X-Sender: nzts.nz at pop3.caverock.net.nz X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.3 (32) Date: Thu, 03 Aug 2000 00:35:49 +1200 To: aussie-weather at world.std.com From: John Gaul Subject: aus-wx: Unusual Sferic Sounds Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com At 20:06 2/08/00 +1000, you wrote: >Hi John > >The others have pretty much covered the story. As well as the weak trough >there was loads of moisture at the surface, in fact too much as the storm >structure was hidden by low scud clouds mostly. It was around 18C too, not >bad for a humid winter day. The storms were not cold air CB's for classic >spring stuff. > >Michael > > > Hi Micheal Was the sound of the sferic different to an artificial sound of static electricity? Lightning sferic does sound different to artificial electicity arcing. I have heard of ball lightning occuring in anticyclonic conditions when the upper atmosphere has been unstable. I did hear of an instance at Westport on the west coast of the South Island where ball lightning was reported " darting around over the clothes line" one day in the 1960's during unseasonableby fine weather there. A strong sulphur smell was emitted after the ball exploded. John Gaul NZ Thunderstorm Society +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: nzts.nz at pop3.caverock.net.nz X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.3 (32) Date: Thu, 03 Aug 2000 00:22:54 +1200 To: aussie-weather at world.std.com From: John Gaul Subject: Re: aus-wx: How on Earth? Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com At 17:58 2/08/00 +1000, you wrote: >John, > >If you looked closely at yesterdays chart you'll find that actually >there was a trough diping into the high, and it was being fed with >moisture from the east of the high. > >There are obviously more complex reasons aswell which you'll find >briefly discussed in Patrick Tobin's post from yesterday morning. > >Andrew. > YES. I did notice that. I wish we would get interesting weather over here JG NZTS >John Gaul wrote: >> >> How on earth can you get get thunderstorms, inclement weather when you have >> a dirty great anticyclone sitting over you. >> We dream of action as the cold fronts move over here but nothing happens >> You are so lucky there in Oz >> >> John Gaul >> NZ Thunderstorm Soc. >> >> >TOP PRIORITY FOR IMMEDIATE BROADCAST >> >SEVERE THUNDERSTORM WARNING >> >BUREAU OF METEOROLOGY >> >NEW SOUTH WALES REGIONAL OFFICE Issued at 1542 on Tuesday the 1st of >> >August 2000 >> >This warning affects people in the Wollongong Local Government Area. >> > >> >This warning is current from 15:40 until 16:40. >> > >> >Storms are currently located near Lake Avon and are forecast to move >> >towards the northeast reaching the Appin Road within the next hour. >> > >> >Large hailstones and heavy rainfall are possible. >> > >> >The STATE EMERGENCY SERVICE advises that as storms approach people >> >should: >> > * put vehicles under cover >> > * move indoors away from windows >> > >> >During and after the storm people should: >> > * beware of fallen trees and power lines >> > * keep away from creeks and drains as you may be swept away >> > >> >The RTA recommends motorists switch their lights & wipers on & slow down >> >in >> >the wet. >> > >> >If your house is damaged contact your local SES unit, listed under "S" >> >in >> >the white pages, for emergency assistance. Don't use the telephone >> >during >> >storms. >> > >> >TV CRAWL: Severe Thunderstorm Warning current for the Wollongong Local >> >Government Area. >> > >> >NOT FOR BROADCAST: This warning will be updated within the next hour. >> >The >> >Bureau and SES would appreciate it being broadcast regularly during this >> >period. >> >-- >> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Godsman, Andrew AG" To: "'aussie-weather at world.std.com'" Subject: aus-wx: More Illawarra Thunder Date: Tue, 1 Aug 2000 15:01:59 +1000 X-Mailer: Internet Mail Service (5.5.2448.0) Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com A little further to the last email, There seems to be a very moist NE flow developing along the Illawarra, with at least three large Cu going to maybe as high as 4-5,000m with a little backshearing evident on an anvil above Mt Kiera. Another cell has matured near Robertson, but very little is obvious down that way a/c low level cloud cover. This is the source of the anvil given the odd rumble of thunder at the moment. There also seems to be a cell developing over the Camden/Cambelltown area. Just took some digital piccies. If anyone wants them, please reply to agam at smartchat.net.au. How great is this, dry, dumping snow last Thursday, thunderies today. Happy days are here again, Andrew G EOM NOTICE - This message contains information intended only for the use of the addressee named above. It may also be confidential and/or privileged. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify postmaster at bhp.com. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Godsman, Andrew AG" To: "'aussie-weather at world.std.com'" Subject: aus-wx: Another Wollongong Chase Report Date: Wed, 2 Aug 2000 07:45:29 +1000 X-Mailer: Internet Mail Service (5.5.2448.0) Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Here we go, here we go... The day started out innocently enough, but around 2:30pm while walking outside to the canteen I noticed anvil above and heard thunder shortly after. I quickly grabbed the digital camera and made an excuse about taking piccies of our waste water treatment plant before going for a walk. The scene along the Illawarra escarpment was great. It was very dark around Robertson way, with no features visible, but it was from this direction that the anvil was coming. The lower level winds were very moist from the NE with lots of low cloud which usually fogs up the escarpment (about 500m elevation). Further along, closer to Mount Kembla was a nicely developing cell, which was just starting to show a backshearing anvil as I took a couple of photos. Also, further up the coast, probably around Cambelltown/Camden area was another cell in a slightly earlier stage of development, ie no anvil. The prevailing upper winds seemed to be from the SW judging by the anvil direction, but mid level winds! ! ! seemed N, maybe it was hard to read, but that was my impression looking at clouds at different levels. So back into the office with some light rain, I decided it was time to leave work for the half hour ride home. By this stage it was 3:30pm, and I was treated to a few CG's from the storm west of Mt Kembla, which seemed to be travelling north at a rate which matched my progress by bicycle. The rain got progressively heavier as I neared home at North Wollongong, and thunder was quite regular overhead, which I must assume was from anvil crawlers. I arrived home just after 4:00pm, attempted to take a couple of lightening shots from my balcony, which was no good. As the storm seemed to clear Mt Ousley I decided to chase the back of it north. Arriving near the top of Mt Ousley, traffic slowed, and there was a layer of hail all over the road. The first accident on southbound lanes was slowing things up. As I was driving, I was taking pictures, some with the digital camera I had brought home from work, others with my 35mm. Over the top of Mt Ousely and I was treated to a surreal mammatus shot and heaps more hail, but the storm was getting away. An overturned car under the Picton Rd overpass again slowed traffic as the hail started coming down again. Just after this I was stopped in the northbound lanes by two lanes of traffic refusing to go past the scene of a 15 car accident on the southbound lanes. Some people even stopped in the emergency lane, stopping any progress, even for emergency vehicles arriving at the scene. Whi! ! ! le I was stopped, hail began falling quite heavily as the last of the storm went overhead, most hail was up to around 8-10mm in diameter. Finally traffic was driven on by the police and I got to Bulli tops in time for a spectacular lightening show. The storm had travelled out to sea, off the Bellambi/Wonoona area. The hail shafts off the back seemed to be falling from anvil rather than cb. The lightening seemed to be increasing in frequency as well. But the storm shape interested me. The front end seemed much lower than the rear, with a solid precipitation shaft to define it from the surrounding low cloud. Hopefully the long exposure photos I took will turn out today. I hung around for about half an hour, until dark, and my last shot on the film. Making my way home was very painful, it took 25 minutes to crawl 1km to Bulli Pass. In this time another electrically active storm neared from the west, and light hail was beginning to fall as I came down Bulli Pass. Then it was an easy drive home, with hail apparent in the median strip along the Northern Distributor near Corrimal, as tedrils of mist floated out across the road. Then the lightening continued at home for another hour, some within 600m (2 sec between cg and boom). Also, a very heavy period of rain with some light hail to finish off the show at around 7:30pm. All in all, a very good day, which I hope I get better photographic results than last week. The digital shots look okay this morning. Also, some quite nice looking cb's off the coast this morning, with anvils. So with a forecast for developing showers about lunchtime, I can only hope for something akin to yesterday to again develop, as I have the car today. Over and out. Andrew Godsman EOM NOTICE - This message contains information intended only for the use of the addressee named above. It may also be confidential and/or privileged. If you are not the intended recipient of this message you are hereby notified that you must not disseminate, copy or take any action in reliance on it. If you have received this message in error please notify postmaster at bhp.com. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "clyve herbert" To: Subject: Re: aus-wx: Strange lightning static on Radio Date: Wed, 2 Aug 2000 23:23:54 +1000 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all about this strange electrical noise ,i was videoing an active night storm here in Geelong in Jan 99 with frequent lightning and very close cgs when i video; i also have my very cheap and very sensitive am radio near by ;as i panned my camera a lightning strike occurred just 300m away and struck a substation the very loud crackle was followed by a prolonged gravelly discharge on the am radio which coincided with the sub station powerflash the whole thing lasted about 7or 8 seconds. regards Clyve H ----- Original Message ----- From: Andrew Wall To: Sent: Wednesday, August 02, 2000 9:58 PM Subject: Re: aus-wx: Strange lightning static on Radio > Just putting in by 2c worth, > > I very much doubt that Ball lightning was the cause of the spurious > emission detected on the radio. > > There is no evidence that it was such a thing, unless the ball lighting was > actually seen. My idea is that at some point the lightning strike had made > contact with the water, maybe this was obscured by rain, or something, or > would it be possible that you had some sort of interference from a nearby > source, which just happened to start at the same time as the lightning. > > You might want to try and go back to the area and set up everything the way > you had it that night, same frequency as well, and just listen and see if > you can hear the same noise. > > Andrew Wall > > > At 09:37 PM 8/1/00 +1000, you wrote: > >I drove to Port Kembla this evening to watch the lightning over the sea. Had > >the radio tuned to AM as usual to hear the discharges. > > > >During one very long bolt that stretched across the sky the radio sparked as > >normal but was immediately followed by about 15 seconds of noise no unlike a > >large piston motorbike passing and fading into the distance. The noise was > >quite loud. > > > >Michael Thompson > >http://thunder.simplenet.com > > > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of your > > message. > > -----------------------jacob at iinet.net.au------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Pearce" To: Subject: Re: aus-wx: How on Earth? Date: Wed, 2 Aug 2000 23:42:00 +1000 X-Mailer: Microsoft Outlook Express 4.72.3110.1 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com John, I think you'll find you do get interesting weather over there. I was born in NZ and lived there for about 10 years of my life so have a bit of local knowledge still, although now definitely call myself an Aussie! NZ has its fair share of decent weather: for example, the frequency of extratropical cyclones that affect mainly the North Island, but also to a lesser extent the east coast of the South Island in summer and autumn months. Also, from memory, the east coast of the North Island gets its fair share of summer time storms. Not to mention the fact that tornadoes are also relatively frequent there during the warmer months. Despite the fact the weather appears boring, you can always learn something from it, and it doesn't really help to continually complain that one country gets less interesting weather than another - Aus and NZ have completely different climates, so will naturally have different weather. Happy weather watching Matt +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "clyve herbert" To: Subject: Re: aus-wx: Spillane eddy over Melbourne this morning?????? Date: Wed, 2 Aug 2000 23:34:34 +1000 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Bussy Anabatic is a diurnal flow of air up a slope found mainly during the afternoon;katabatic is a flow of air down the slope coursed by night cooling therefore the cooler air drains to lower areas this katabatic outflow can also be the reverse flow of a sea breeze sometimes known as a land breeze at night and is usually weaker than the sea breeze. interestingly a type of katabatic flow running towards coastal areas of Antarctica from the interior plataeu can reach speeds of 200kph+! not bad regards Clyve Herbert. ----- Original Message ----- From: bussie To: Sent: Wednesday, August 02, 2000 5:49 PM Subject: Re: aus-wx: Spillane eddy over Melbourne this morning?????? > Don't mean to be the ignoramus here but, what does katabatic mean?? > > Bussy > > ----- Original Message ----- > From: Rod Aikman > To: > Sent: Friday, July 28, 2000 12:54 PM > Subject: Re: aus-wx: Spillane eddy over Melbourne this morning?????? > > > > Hi everyone, > > Speaking of local geographical effects on wind patterns under > > certain weather conditions inspires me to mention a particular wind effect > > that is often experienced here (Bendigo). > > During summer, under clear anticyclonic light southerly to > > south-easterly surface wind flows, the maximum temperature will reach the > > high twenties to thirty degree range. A short while after sunset, or a > > little after 9.00pm in January, the very light southerly to south-easterly > > wind will freshen right up to around 20-25 km/h, and remain at this force > > for a couple of hours, before moderating back to virtually calm conditions > > around midnight. > > Just after sunset, the most rapid cooling takes place under dry air, > > light wind, clear sky conditions, and it is this rapid cooling that I > think > > sets up a katabatic effect, in that the cooler air near the surface slides > > down the northern slopes of the dividing range and re-inforces the slight > > south to south-east surface flow. > > > > Rod Aikman > > Golden Square, > > Bendigo, Vic. > > > > > > Hi Robert > > From my limited study of this phenomenon the Spillane eddy requires the > > positioning of an anticyclone towards the south of Victoria and a low > level > > east flow pattern the development though appears rather complex and may be > > associated with complicated katabatic effects across the Port Phillip bay > > area ie the mean katabatic flow over northern parts of the bay is usually > > from a north direction but on the west side of the bay mostly from a west > > or north west angle the easterly flow may also be enhanced by channelling > > through the Latrobe valley area , what you saw may have been a local > > katabatic effect with the distant stacks just above the low level cold > > outflow boundary layer i have seen this effect at the shell refinery corio > > where the highest stack moves from an east direction and lower stacks from > a > > west direction in early morning situations its all interesting stuff > > regards Clyve H > > ----- Original Message ----- > > From: Robert Goler > > To: > > Sent: Thursday, July 27, 2000 2:48 PM > > Subject: aus-wx: Spillane eddy over Melbourne this morning?????? > > > > > > > > > > Hi all > > > > > > Can anyone shed some light on this one? > > > > > > I live one floor from the top of a 12 storey building in Clayton (about > > > 20km SE of Melbourne CBD) and my view is to the west. This morning was > > the > > > second morning where I noticed the smoke from neighbouring smoke stacks > > > blowing southward, while on the west side of the bay, the smoke from > > > those smoke stacks was blowing to the north. Looking at the MSL > analysis > > > and the cumulus cloud motions showed a southerly flow present, although > > > this was barely noticeable at ground level as I walked to uni. > > > > > > Q. I was wondering if this caused by the effects of the Spillane eddy? > > > (Er, this is a cyclonic circulation centered on Melbourne bound by the > > > ranges to the north and east and west, and forms under stable > conditions. > > > Bob Crowder's book shows a satellite image of this and mentions it > > briefly > > > in the section on air pollution.) > > > > > > Or is it simply caused by the geography of my area? At the moment, I'm > > > trying to get a hold of an elevation map of the region here, as I'm not > > > quite sure where everything is. Incidently, this cannot be explained by > > > wind shear in the vertical as the sounding doesn't show this dramatic > 180 > > > degree turn. > > > > > > I should point out that smoke stacks to the south showed no east-west > > > deviation, and seemed to be blowing away, while those to the > > > north-northwest also had no east-west deviation, but due to their > > > distance, I was unable to say for certain that these were blowing > towards > > > me. > > > > > > I indirectly got in touch with the BoM, but they say that the southerly > > > flow was too fast for the Spillane eddy to form. > > > > > > The first time I saw this was on June 27 in the morning, which had a > > > very similar synoptic situation over Victoria. It was quite noticeable > > > around 9 through to about 10am, but by 10:30, the smoke stacks on this > > > side became erratic in nature, and eventually adopted a northward flow, > > > thus matching the western side and the synoptic pattern. This would be > > > explained by convective heating breaking this 'eddy'. > > > > > > I took photos showing the opposing motions of the smoke stack, but the > > > lack of contrast made the smoke stack in the distance invisible in the > > > scan. However, it can be seen well in the prints. > > > > > > So, does anyone have an idea? > > > > > > > > > Cheers > > > > > > -- > > > > > > Robert A. Goler > > > > > > E-mail robert at mail.maths.monash.edu.au > > > http://www.maths.monash.edu.au/~robert/ > > > > > > Department of Mathematics and Statistics > > > Monash University > > > Clayton, Vic 3800 > > > Australia > > > > > > -- > > > > > > > > > > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > > To unsubscribe from aussie-weather send e-mail > > to:majordomo at world.std.com > > > with "unsubscribe aussie-weather your_email_address" in the body of > your > > > message. > > > > -----------------------jacob at iinet.net.au------------------------------ > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail > to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of your > > message. > -----------------------jacob at iinet.net.au------------------------------ > > > > ________________________________________________________________________ > > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of your > > message. > > -----------------------jacob at iinet.net.au------------------------------ > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Originating-IP: [203.109.250.96] From: "Paul Graham" To: aussie-weather at world.std.com Subject: aus-wx: Tornado NW of Tamworth last summer Date: Wed, 02 Aug 2000 14:56:02 GMT X-OriginalArrivalTime: 02 Aug 2000 14:56:02.0353 (UTC) FILETIME=[C6AFCA10:01BFFC91] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone, A friend at uni was telling me today that on her geology field trip last summer she spotted a tornado associated with a thunderstorm somewhere NW of Tamworth. I'll see if I can get some more details and post them to the list in due course. - Paul G. ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Originating-IP: [203.109.250.97] From: "Paul Graham" To: aussie-weather at world.std.com Subject: Re: aus-wx: Strange static on Radio Date: Wed, 02 Aug 2000 15:23:44 GMT X-OriginalArrivalTime: 02 Aug 2000 15:23:44.0899 (UTC) FILETIME=[A5A42D30:01BFFC95] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Close up, the electro-magnetic field created by the lightning can induce large voltages/currents in nearby conductors. Where I used to live, I had a long wire antenna for short-wave. Each time we had a storm where there were close CG strikes, I would see a spark jump from the antenna lead to the ground connection. Also, once a friend came home after a thunderstorm to find a power extension cord all black and melted on the floor. The cord was not connected to anything but it was plugged into the mains and the switch had been left on. What must have happened is similar to my antenna situation with a spark induced by a near-by lightning strike, shorthing out the cable and allowing maximum current to flow through from the mains! Back to the strange static detected on the AM radio, another possible cause is a geo-magnetic storm. When I used to listen toa lot of short wave radio during the last solar cycle maximum in 1989/1990, I would notice the so called "short-wave fadeouts" would be preceded by a general rise in the background noise (static) levels - it would start gradually and then rise quite rapidly until you couldn't hear any other signals, then it would gradually diminish until it was relatively quiet again. I checked the recent solar flare list and it doesn't seem to be the case this time around so maybe it was just a nearby motor cycle or car engine - something more mundane? - Paul G. >Hi all > about this strange electrical noise ,i was videoing an active night >storm >here in Geelong in Jan 99 with frequent lightning and very close cgs when >i >video; i also have my very cheap and very sensitive am radio near by ;as i >panned my camera a lightning strike occurred just 300m away and struck a >substation the very loud crackle was followed by a prolonged gravelly >discharge on the am radio which coincided with the sub station powerflash >the whole thing lasted about 7or 8 seconds. regards Clyve H >----- Original Message ----- >From: Andrew Wall >To: >Sent: Wednesday, August 02, 2000 9:58 PM >Subject: Re: aus-wx: Strange lightning static on Radio > > > > Just putting in by 2c worth, > > > > I very much doubt that Ball lightning was the cause of the spurious > > emission detected on the radio. > > > > There is no evidence that it was such a thing, unless the ball lighting >was > > actually seen. My idea is that at some point the lightning strike had >made > > contact with the water, maybe this was obscured by rain, or something, >or > > would it be possible that you had some sort of interference from a >nearby > > source, which just happened to start at the same time as the lightning. > > > > You might want to try and go back to the area and set up everything the >way > > you had it that night, same frequency as well, and just listen and see >if > > you can hear the same noise. > > > > Andrew Wall > > > > > > At 09:37 PM 8/1/00 +1000, you wrote: > > >I drove to Port Kembla this evening to watch the lightning over the >sea. >Had > > >the radio tuned to AM as usual to hear the discharges. > > > > > >During one very long bolt that stretched across the sky the radio >sparked >as > > >normal but was immediately followed by about 15 seconds of noise no >unlike a > > >large piston motorbike passing and fading into the distance. The noise >was > > >quite loud. > > > > > >Michael Thompson > > >http://thunder.simplenet.com > > > > > > > > > >+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > > To unsubscribe from aussie-weather send e-mail >to:majordomo at world.std.com > > > with "unsubscribe aussie-weather your_email_address" in the body of >your > > > message. > > > >-----------------------jacob at iinet.net.au------------------------------ > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail >to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of >your > > message. > > -----------------------jacob at iinet.net.au------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Les Crossan" To: Subject: Re: aus-wx: Strange lightning static on Radio Date: Wed, 2 Aug 2000 17:11:20 +0100 Organization: Cosmic EuroCon X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com ----- Original Message ----- From: McDonald To: Sent: Wednesday, August 02, 2000 9:43 AM Subject: Re: aus-wx: Strange lightning static on Radio > I don't know if we are thinking about the same thing but I notice this > regularly when very close strikes hit. I get a whining sort of static That's precipitation static - most noticable with AM radios with valve (tube) or MOSFET front ends - goes something like this: "zzzzzzzzzzzzzeeeeeeeeeeeeeee" then a crackle during the lightning strike. It's really noticable on electrostatic meters when theres a large excursion to -2500V/m prior to the strike (ties up with the noise) then a rapid fall when the lightning occurs. Les (UK) +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Thu, 03 Aug 2000 19:25:28 +1000 From: Keith Barnett X-Mailer: Mozilla 4.6 [en] (Win95; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Unusual Sferic Sounds Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I have often heard about the sulphur smells that accompany storms, even tornados. In fact I vividly recall a day in (I think) January 1961 when although there weren't storms there had been heavy rain periods or showers from deep convective cumulus in an easterly stream. Late one afternoon after one such downpour, there was a terrible smell of rotten egg gas. I thought at the time it had something to do with the French nuclear tests in the Pacific (they were in the open air), after reading all sorts of press hype, and was scared I was breathing in radioactive gases (I was only 13 or so)!. But my question to anyone is, what is the cause of the smell? Presumably it's the effect of lightning causing a chemical interaction, perhaps a peculiar form of nitric oxide being generated by fusion of nitrogen and oxygen molecules? John Gaul wrote: A strong sulphur smell was emitted after > the ball exploded. > > John Gaul > NZ Thunderstorm Society > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Michael Thompson" To: Subject: Re: aus-wx: Unusual Sferic Sounds Date: Thu, 3 Aug 2000 20:44:07 +1000 Organization: X-Mailer: Microsoft Outlook Express 5.00.2014.211 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com The sound was different, louder and deeper. Michael ----- Original Message ----- From: John Gaul To: Sent: Wednesday, 2 August 2000 22:35 Subject: aus-wx: Unusual Sferic Sounds > At 20:06 2/08/00 +1000, you wrote: > >Hi John > > > >The others have pretty much covered the story. As well as the weak trough > >there was loads of moisture at the surface, in fact too much as the storm > >structure was hidden by low scud clouds mostly. It was around 18C too, not > >bad for a humid winter day. The storms were not cold air CB's for classic > >spring stuff. > > > >Michael > > > > > > > > Hi Micheal > Was the sound of the sferic different to an artificial sound of static > electricity? > Lightning sferic does sound different to artificial electicity arcing. > > I have heard of ball lightning occuring in anticyclonic conditions when the > upper atmosphere has been unstable. I did hear of an instance at Westport > on the west coast of the South Island where ball lightning was reported " > darting around over the clothes line" one day in the 1960's during > unseasonableby fine weather there. A strong sulphur smell was emitted after > the ball exploded. > > > John Gaul > NZ Thunderstorm Society > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Michael Thompson" To: Subject: Re: aus-wx: Strange lightning static on Radio Date: Thu, 3 Aug 2000 20:46:39 +1000 Organization: X-Mailer: Microsoft Outlook Express 5.00.2014.211 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com This noise came directly following the normal spark noise of the discharge. There was no other AM noise prior. Michael > > > > I don't know if we are thinking about the same thing but I notice this > > regularly when very close strikes hit. I get a whining sort of static > > That's precipitation static - most noticable with AM radios with valve > (tube) or MOSFET front ends - goes something like this: > > "zzzzzzzzzzzzzeeeeeeeeeeeeeee" then a crackle during the lightning strike. > It's really noticable on electrostatic meters when theres a large excursion > to -2500V/m prior to the strike (ties up with the noise) then a rapid fall > when the lightning occurs. > > Les (UK) > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: nzts.nz at pop3.caverock.net.nz X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.3 (32) Date: Thu, 03 Aug 2000 19:55:53 +1200 To: aussie-weather at world.std.com From: John Gaul Subject: aus-wx: Maybe the Anticyclone Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com AHA ! Very quiet in Australia especially the along the east coast. Maybe the anticyclone is doing what it is supposed to !?!?!? Looks as though that upper level trough is moving towards Auckland. They are predicting thunder showers up there tomorrow, how lucky for them. By the way we got a good frost here in Christchurch this morning. I recorded a screen minimum temperature of minus 4.7. Coldest so far this year. Bits of frost around at noon here. Another good frost due tonight which is good because it has been so mild here. July was about 3 degrees above the mean here at my site. John Gaul NZ Thunderstorm Society - more than just thunder +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Thu, 3 Aug 2000 04:50:21 -0700 (PDT) From: Mario Paul Subject: aus-wx: radar fixed To: weather Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi All, Just a public thankyou to michael fewings for fixing my radar problems!I'm very grateful and keep up the great work! :) ....mario __________________________________________________ Do You Yahoo!? Kick off your party with Yahoo! Invites. http://invites.yahoo.com/ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: astroman at mail.chariot.net.au X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Thu, 03 Aug 2000 21:28:06 +0930 To: aussie-weather at world.std.com From: Andrew Wall Subject: aus-wx: 150km/h winds with Tornado near Adelaide 20th of July Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone, I received an article by post, on a tornado that went through the Woodchester area at night on the 20th of July, 2000. I will do a write up on it and add it to the site. Basically the tornado damage path was 200m wide by 10km long. It damaged a few houses ripping off roofs, bending and twisting metal, broke trees in half and ripped some of them up also. I will see if I can get copies of the photo's if possible... regards Andrew +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Thu, 03 Aug 2000 22:18:45 +1000 From: Matthew Smith X-Mailer: Mozilla 4.73 [en] (Win98; U) X-Accept-Language: en To: aussie-weather at world.std.com Subject: aus-wx: August 1 severe storm report and photos! Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone I just finished a report on the severe storm that affected Wollongong on Tuesday, with photos kindly submitted from Andrew Godsman and a mate of mine in Ulladulla, also a couple of sat pics and radar and things. http://www.sydneystormchasers.com/2000/August1.htm I have a couple of photos of the storm still in the camera, when there developed ill add them to the report. Enjoy! Matt Smith http://www.sydneystormchasers.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------