Storm News
[Index][Aussie-Wx] |
Australian Weather Mailing List Archives: Tuesday, 8 February 2000 |
From Subject -------------------------------------------------------------------------------------- 001 Anthony Cornelius [cyclone at flatrate.net.au] Heat in Sydney 002 "John Woodbridge" [jrw at pixelcom.net] Heat in Sydney 003 Michael Scollay [michael.scollay at telstra.com. Heat in Sydney 004 Michael Scollay [michael.scollay at telstra.com. Heat in Sydney 005 Paul.Mossman at DWNNICH.OCA.nt.gov.au Monsoon finally starting to kick 006 Desley Absolon [mystyle at bigpond.com.au] Rain, Rain and more Rain 007 Michael Scollay [michael.scollay at telstra.com. Re: Awesome new dust devil pics are up! 008 Paul.Mossman at DWNNICH.OCA.nt.gov.au Rain, Rain and more Rain 009 Phil Bagust [paisley at cobweb.com.au] Re: Awesome new dust devil pics are up! 010 Jimmy Deguara [jdeguara at ihug.com.au] Re: Awesome new dust devil pics are up! 011 Jacob [jacob at iinet.net.au] 1st 40C in Perth City for 2 years today 012 Matt Smith [disarm at braenet.com.au] VIC/NSW Storms 013 Jimmy Deguara [jdeguara at ihug.com.au] Williamtown radar 014 Matt Smith [disarm at braenet.com.au] Williamtown radar 015 Ira Fehlberg [jra at upnaway.com] Awesome new dust devil pics are up 016 Matt Smith [disarm at braenet.com.au] Macca's storm chase! 017 "Jane ONeill" [cadence at rubix.net.au] Melbourne storms 018 peter matters [pmatters at eck.net.au] VIC/NSW Storms -------------------------------------------------------------------------------------- 001 Date: Mon, 07 Feb 2000 23:09:22 +1000 From: Anthony Cornelius [cyclone at flatrate.net.au] X-Mailer: Mozilla 4.6 [en] (Win98; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: UV Readings - was: Re: aus-wx: Heat in Sydney Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com A question on UV readings... I was under the impression that UV was related to cloud? Well - while I normally do my own forecasts at home, when I'm at my dad's farm, I rely on the BoM forecasts via 1196. Anyway - we had a couple of days of rain (this was just after Christmas I *think*), and all the forecasts were for a UV-rating of 14 - extreme, during rain. But then when it decreased to "mostly fine, just the chance of an isolated shower about" - the UV forecast dropped to "8 - high." This confused me - perhaps I have misinterpretted the scale? Anyone with information on this? Keith Barnett wrote: > > Correct me if I'm wrong, but there would have to be a substantial 'ozone > hole' across southeastern Australia for Sydney to be getting extra > UV..as the sun is north of 23 deg S (I think) all year.In other words > the angle of its radiation doesn't take it (the radiation) onto Sydney > if the ozone hole is to Sydney's south. > I'm sure if there was one we would have heard about it by now... -- Anthony Cornelius Queensland Coordinator of the Australian Severe Weather Association (ASWA) (07) 3390 4812 14 Kinsella St Belmont, Brisbane QLD, 4153 Please report severe thunderstorms on our Queensland severe thunderstorm reporting line on (07) 3390 4218 or by going to our homepage at http://www.severeweather.asn.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------------------------------ 002 From: "John Woodbridge" [jrw at pixelcom.net] To: [aussie-weather at world.std.com] Subject: RE: aus-wx: Heat in Sydney Date: Tue, 8 Feb 2000 00:35:40 +1000 X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi All, Just an addendum to all this. The major "burning" influence on Tree Ferns is actually dry air, not solar radiation. Even on merely warm days, very low humidity will cause native Tree Ferns of the genus Cyathea and in particular, Dicksonia, to brown off quite severely. This effect can also been seen as a result of strong Winter Westerly's with again very low humidity. Tree ferns, as per all ferns, have evolved for high humidity environments, and cannot replenish moisture in the leaves to compensate of the evaporative loss when low humidities are encountered. Of course, any day on the East coast with temps in the high 30's usually implies low humidity conditions with off-shore winds. Because of this you simply won't find Tree ferns growing in the open in either Perth or Adelaide, whereas you will find them in full sun positions in both Sydney & Brisbane. The recent hot dry spell here in Brisbane really knocked them around also, even in partly shaded locations. John. >snip My native measure of heat intensity is an ancient tree fern in a sheltered and shaded position in our front yard. The last time that this fern got burned to the extent that it did on Saturday was during February in 1998...Prior to that was the during the bush fires of 1994 and on at least 5 other occasions during its 50-year life. Whether this tree fern is burned or not depends on two factors 1) The ambient temperature and 2) the reflected solar radiation intensity. Each factor on its own has never been enough to burn this fern in it's 50+ year life, according to the now deceased original owners of our home. But when both heat and the reflected solar radiation strike with maximum intensity, as was Saturday, February 5, 2000, it is very damaging to this fern. On this occasion, the burning was more severe than in both 1994 and 1998. Michael Scollay +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 003 Date: Tue, 08 Feb 2000 10:37:32 +1100 From: Michael Scollay [michael.scollay at telstra.com.au] Organization: Telstra Strategy & Research X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Heat in Sydney Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com John Woodbridge wrote: > > Hi All, > > Just an addendum to all this. The major "burning" > influence on Tree Ferns is actually dry air, not > solar radiation...[snip] Thanks for that explanation, John. I suppose rather than the "dryness" of air, it's the rate of evapouration which is the "killer of tree ferns" since in Sydney, some of our dryest days, from the RH perspective, are in late winter when the temperature is about the high teens, but there is much more evapouration at a higher RH when the temperature is about the high thirties during a hot summer's day...Last Saturday was complicated by both extreme UV and extremely dry air. Michael Scollay mailto:michael.scollay at telstra.com.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------------------------------ 004 Date: Tue, 08 Feb 2000 11:06:14 +1100 From: Michael Scollay [michael.scollay at telstra.com.au] Organization: Telstra Strategy & Research X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Heat in Sydney Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Michael Scollay wrote: > > John Woodbridge wrote: > > > > Hi All, > > > > Just an addendum to all this. The major "burning" > > influence on Tree Ferns is actually dry air, not > > solar radiation...[snip] > > Thanks for that explanation, John. I suppose rather than > the "dryness" of air, it's the rate of evapouration which > is the "killer of tree ferns" since in Sydney, some of our > dryest days, from the RH perspective, are in late winter > when the temperature is about the high teens, but there > is much more evapouration at a higher RH when the > temperature is about the high thirties during a hot > summer's day...Last Saturday was complicated by both > extreme UV and extremely dry air. I must be extremely confused:-) Just what is the correct term that decribes the evapourative potential of a given air mass in given conditions? Relative Humidity (RH) doesn't seem to be the correct measure on its own. Absolute Humidity neither...We need a term that combines both the "radiative evapourative potential" (i.e. the warming of a surface by both direct and reflected solar radiation that aids evapouration), the wind velocity or "forced evapourative potential" (i.e. if air is not moving in theory, it will gradually increase its RH as water is evaporated. A continuing source of moving "dry air" aids a sustained rate of evapouration) and Relative Humidity which is a function of the ambient air temperature... Michael Scollay mailto:michael.scollay at telstra.com.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------------------------------ 005 From: Paul.Mossman at DWNNICH.OCA.nt.gov.au To: " - *aussie-weather at world.std.com" [aussie-weather at world.std.com] Subject: aus-wx: Monsoon finally starting to kick Date: Tue, 8 Feb 2000 11:08:00 +0930 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id UAA28058 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Howdy all. It is pelting down here atm. Seems that the monsoon finally has decided to arrive. Paul at Darwin. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 006 Date: Tue, 08 Feb 2000 11:50:14 +1000 From: Desley Absolon [mystyle at bigpond.com.au] X-Mailer: Mozilla 4.04 [en] (Win95; I) To: aussie-weather at world.std.com Subject: aus-wx: Rain, Rain and more Rain Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all, Can ya hear that????? We have an Iron Roof and it is pelting so hard you can hardly hear yourself think....fan.bloody.tastic!!!!!!! Looks like the 'wet' might have commenced in Cairns!! Obviously - as the local BoM in their informal spot on local talk-back radio predicted yesterday that 'the influences for creating heavy rain had dissipated' and we would only get showers ......yeah right!!!!!!!! Unofficially my mother has an old rain gauge and lives in Whitfield - inner suburb of Cairns - and has recorded approximately 14 inches in the 48 hours from Saturday 6am to this morning. Plenty of local flooding - two primary schools closed.- kept my daughter home from High School as there was so much surface water around - ..was a chance that the northern highway would close with the high tide this morning but that seems to have been avoided. Landslides on the Gillies and Kuranda ranges. Gillies closed, Kuranda open. Huge amounts of rain around Tully. Local radio this morning indicated that a creek in Tully had broken it's banks and there was water through the town. Local residents phoning in reported 11 inches overnight in the Tully area. All we need now is a little circular disturbance around Cat 3 in the Coral Sea to complete the picture!! Desley in Cairns. Desley Absolon wrote: > Hi Everyone > > Further to the lovely low in the Coral Sea - 'The Wet' - or at least a portion > of it fell on Cairns over the weekend. Unofficial report to 9.00 am yesterday > (Saturday) - 104mm in Cairns City..just showers throughout yesterday and > overnight...until 5.30 this morning when the clouds opened... I recorded 190 mm > to 12 Noon.... cleared a little this afternoon and then cloud burst once > more...haven't checked the gauge...but the frogs are going off....about time > too!!!! > > Desley in Cairns > > Bill Webb wrote: > > > Hi James and List > > > > Noticed the low - which BoM are calling a trough, presumably to prevent > > spooking the locals - on Townsville BS radar loop this morning. It has > > certainly stirred up the shower activity in the area. > > > > Proserpine 27.5mm to 0600 EST yesterday, > > A further 41mm this morning. > > > > Reported falls up to 340mm near Mackay, and 40 to 100+mm common on the > > Central Coast, and more to come no doubt as the system drifts south and > > west. > > > > Keeping the temperatures down though - some southerners might look to come > > north for the summer the way things are looking down there ! > > > > Winds off shore gusting to 50knots, but mainly 20 to 30 according to BoM - > > no off shore fishing today ! Might chase a barramundi up a creek seeing the > > season opened Feb. 1 last, and try for a mud crab or two. Oh woe. > > > > Then again, there are a few prawns about too .......... decisions, > > decisions. > > > > Sun's shining - catch ya later. > > > > Bill > > Proserpine NQ > > > > ----- Original Message ----- > > From: James Chambers> > To: aus-wx > > Sent: Friday, February 04, 2000 11:39 PM > > Subject: aus-wx: Coral Sea Low > > > > > Hi all > > > > > > I got myself out of my sickbed to go online and check the satpics and > > radar. > > > I was surprised to see quite a well developed low in the Coral Sea near > > > Willis Island. > > >snip > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > 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------------------------------ 007 Date: Tue, 08 Feb 2000 12:54:15 +1100 From: Michael Scollay [michael.scollay at telstra.com.au] Organization: Telstra Strategy & Research X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Re: Awesome new dust devil pics are up! Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Ira Fehlberg wrote on Mon, 07 Feb 2000 12:16:19 +0800: > > I have posted some new pics to my site, they are Johns pics that he took > from chasing them for a week near Mildura recently. He saw about 600 whilst > chasing for just a few hours everyday and they are worth a look believe me. > Some of em look just like the base of small tornadoes, John also shot anout > 2hrs worth of video. Its at http://www.upnaway.com/~jra/weather.html then > click on the dust devil button below the picture of the month. Indeed, they are awesome. Thanks! I wonder whether the formation of Decent Dust Devils (DDDs:-) is closely related to tornados from supercell thunderstorms. My scant knowledge of gliding combined with the extensive experience of glider pilots from the Bathurst Soaring Club gives "observed" evidence of rotating thermals in clear air during both cloudless days and also some way underneath fair weather cumulus clouds. This rotation appears to combine with intensive thermal activity from ground level to set an entire column of air into rotation giving both a structure and appearance of a DDD very similar, if not identical to a tornado. One question remains however, that is the direction of rotation which is difficult to judge from the still photographs. Perhaps John and Ira have some comments about this. Michael Scollay mailto:michael.scollay at telstra.com.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------------------------------ 008 From: Paul.Mossman at DWNNICH.OCA.nt.gov.au To: " - *aussie-weather at world.std.com" [aussie-weather at world.std.com] Subject: Re: aus-wx: Rain, Rain and more Rain Date: Tue, 8 Feb 2000 12:03:46 +0930 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id VAA06919 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Indeed it must be wet there!! Rainfall figures (BOM) for the week are Cairns - 640 mm Cairns Ap - 493mm Tully - 793mm!!!!! that is just amazing!! No wonder its Australias wetest town. Wonder how Mt Bellenden-Kerr's total is going! mystyle at bigpond.com.au at SMTP at world.std.com on 08/02/2000 11:56:10 AM Please respond to aussie-weather at world.std.com at SMTP Sent by: aussie-weather-approval at world.std.com To: aussie-weather at world.std.com at SMTP cc: Subject: aus-wx: Rain, Rain and more Rain Hi all, Can ya hear that????? We have an Iron Roof and it is pelting so hard you can hardly hear yourself think....fan.bloody.tastic!!!!!!! Looks like the 'wet' might have commenced in Cairns!! Obviously - as the local BoM in their informal spot on local talk-back radio predicted yesterday that 'the influences for creating heavy rain had dissipated' and we would only get showers ......yeah right!!!!!!!! Unofficially my mother has an old rain gauge and lives in Whitfield - inner suburb of Cairns - and has recorded approximately 14 inches in the 48 hours from Saturday 6am to this morning. Plenty of local flooding - two primary schools closed.- kept my daughter home from High School as there was so much surface water around - ..was a chance that the northern highway would close with the high tide this morning but that seems to have been avoided. Landslides on the Gillies and Kuranda ranges. Gillies closed, Kuranda open. Huge amounts of rain around Tully. Local radio this morning indicated that a creek in Tully had broken it's banks and there was water through the town. Local residents phoning in reported 11 inches overnight in the Tully area. All we need now is a little circular disturbance around Cat 3 in the Coral Sea to complete the picture!! Desley in Cairns. Desley Absolon wrote: > Hi Everyone > > Further to the lovely low in the Coral Sea - 'The Wet' - or at least a portion > of it fell on Cairns over the weekend. Unofficial report to 9.00 am yesterday > (Saturday) - 104mm in Cairns City..just showers throughout yesterday and > overnight...until 5.30 this morning when the clouds opened... I recorded 190 mm > to 12 Noon.... cleared a little this afternoon and then cloud burst once > more...haven't checked the gauge...but the frogs are going off....about time > too!!!! > > Desley in Cairns > > Bill Webb wrote: > > > Hi James and List > > > > Noticed the low - which BoM are calling a trough, presumably to prevent > > spooking the locals - on Townsville BS radar loop this morning. It has > > certainly stirred up the shower activity in the area. > > > > Proserpine 27.5mm to 0600 EST yesterday, > > A further 41mm this morning. > > > > Reported falls up to 340mm near Mackay, and 40 to 100+mm common on the > > Central Coast, and more to come no doubt as the system drifts south and > > west. > > > > Keeping the temperatures down though - some southerners might look to come > > north for the summer the way things are looking down there ! > > > > Winds off shore gusting to 50knots, but mainly 20 to 30 according to BoM - > > no off shore fishing today ! Might chase a barramundi up a creek seeing the > > season opened Feb. 1 last, and try for a mud crab or two. Oh woe. > > > > Then again, there are a few prawns about too .......... decisions, > > decisions. > > > > Sun's shining - catch ya later. > > > > Bill > > Proserpine NQ > > > > ----- Original Message ----- > > From: James Chambers > > To: aus-wx > > Sent: Friday, February 04, 2000 11:39 PM > > Subject: aus-wx: Coral Sea Low > > > > > Hi all > > > > > > I got myself out of my sickbed to go online and check the satpics and > > radar. > > > I was surprised to see quite a well developed low in the Coral Sea near > > > Willis Island. > > >snip > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > 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------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 009 X-Sender: paisley at mail.cobweb.com.au Date: Tue, 8 Feb 2000 13:19:22 +0930 To: aussie-weather at world.std.com From: Phil Bagust [paisley at cobweb.com.au] Subject: Re: aus-wx: Re: Awesome new dust devil pics are up! Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com >Ira Fehlberg wrote on Mon, 07 Feb 2000 12:16:19 +0800: >> >> I have posted some new pics to my site, they are Johns pics that he took >> from chasing them for a week near Mildura recently. He saw about 600 whilst >> chasing for just a few hours everyday and they are worth a look believe me. >> Some of em look just like the base of small tornadoes, John also shot anout >> 2hrs worth of video. Its at http://www.upnaway.com/~jra/weather.html then >> click on the dust devil button below the picture of the month. Golly, darken the sky in the shot of that big one and you've got an F5! ;) Love the fine structure to - do I see the DD equivalent of suction vorticies in a few of those shots?? Phil 'Paisley' Bagust paisley at cobweb.com.au http://www.chariot.net.au/~paisley2 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 010 X-Sender: jdeguara at pop.ihug.com.au X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.2 Date: Tue, 08 Feb 2000 16:48:00 +1100 To: aussie-weather at world.std.com From: Jimmy Deguara [jdeguara at ihug.com.au] Subject: Re: aus-wx: Re: Awesome new dust devil pics are up! Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Michael and others, I won't comment on the relationship between dust devils and supercell tornadoes (although I think the dynamics are different) However, after a talk to Tim Crugeon who was on the list during last year suggested he had information sources suggesting stronger dust devils can reach F2 status. Now that is very strong. There have been documented evidence of WA and SA dust devils causing roof damage to houses. Not bad heh. Jimmy Deguara At 12:54 8/02/00 +1100, you wrote: >Ira Fehlberg wrote on Mon, 07 Feb 2000 12:16:19 +0800: > > > > I have posted some new pics to my site, they are Johns pics that he took > > from chasing them for a week near Mildura recently. He saw about 600 whilst > > chasing for just a few hours everyday and they are worth a look believe me. > > Some of em look just like the base of small tornadoes, John also shot anout > > 2hrs worth of video. Its at http://www.upnaway.com/~jra/weather.html then > > click on the dust devil button below the picture of the month. > >Indeed, they are awesome. Thanks! I wonder whether the formation >of Decent Dust Devils (DDDs:-) is closely related to tornados from >supercell thunderstorms. My scant knowledge of gliding combined >with the extensive experience of glider pilots from the Bathurst >Soaring Club gives "observed" evidence of rotating thermals in >clear air during both cloudless days and also some way underneath >fair weather cumulus clouds. This rotation appears to combine with >intensive thermal activity from ground level to set an entire >column of air into rotation giving both a structure and appearance >of a DDD very similar, if not identical to a tornado. One question >remains however, that is the direction of rotation which is >difficult to judge from the still photographs. Perhaps John and >Ira have some comments about this. > >Michael Scollay mailto:michael.scollay at telstra.com.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------------------------------ 011 X-Sender: jacob at mail.iinet.net.au X-Mailer: QUALCOMM Windows Eudora Pro Version 4.1 Date: Tue, 08 Feb 2000 14:25:51 +0800 To: aussie-weather at world.std.com From: Jacob [jacob at iinet.net.au] Subject: aus-wx: 1st 40C in Perth City for 2 years today Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Very hot in Perth today, the 2:15pm obs just showed Perth City at 40.0C, this is the first time since the 28th February, 1998, when it got to 41.1 that the city has made it to 40. It was also the hottest February night in 3 years last night, with the temperature only getting down to 25.1C. BOM was only going for 33C today, expecting an early seabreaze, but we've had E winds all day so far, even right on the coast at Swanbourne its still blowing an E wind, with the temp there at 39.2C, but seabreaze should be in on the coast soon. Also interesting to note, Adelaide also a had a hot day today, its not often due to the way the weather systems run, that both cities get hot days on the same day. Jacob +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 012 X-Sender: disarm at braenet.com.au (Unverified) X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Tue, 08 Feb 2000 17:55:49 +1100 To: aussie-weather at world.std.com From: Matt Smith [disarm at braenet.com.au] Subject: aus-wx: VIC/NSW Storms Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Nice line of storms developing extending SE/NW across VIC at the moment, and up into west NSW with some action down SE NSW south of Canberra as well. Matt Smith +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 013 X-Sender: jdeguara at pop.ihug.com.au X-Mailer: QUALCOMM Windows Eudora Pro Version 4.2.2 Date: Tue, 08 Feb 2000 18:06:36 +1100 To: aussie-weather at world.std.com From: Jimmy Deguara [jdeguara at ihug.com.au] Subject: aus-wx: Williamtown radar Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I am starting to wonder about the Williamtown radar. Is there low level stuff around in the area or is the radar drunk?? It did this yesterday as well indicating an area of shower activity. Normally I can see signs of it from where I live here at Schofields. Even the satpics don't really show clouds consitent with the rainfall indicated - particularly today. Any comments? Jimmy Deguara +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 014 X-Sender: disarm at mail.braenet.com.au X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Tue, 08 Feb 2000 18:36:39 +1100 To: aussie-weather at world.std.com From: Matt Smith [disarm at braenet.com.au] Subject: Re: aus-wx: Williamtown radar Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I think its playing up Jimmy... it showed showers out to sea yesterday as you indicated but there was nothing really out there. I did see some towers going up to my far SW though about 2 hours ago though. Matt >I am starting to wonder about the Williamtown radar. Is there low level >stuff around in the area or is the radar drunk?? It did this yesterday as >well indicating an area of shower activity. Normally I can see signs of it >from where I live here at Schofields. Even the satpics don't really show >clouds consitent with the rainfall indicated - particularly today. > >Any comments? > >Jimmy Deguara > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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------------------------------ 015 X-Sender: jra at upnaway.com X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Tue, 08 Feb 2000 16:14:32 +0800 To: aussie-weather at world.std.com From: Ira Fehlberg [jra at upnaway.com] Subject: aus-wx: Awesome new dust devil pics are up Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com To answer a few questions, yep im pretty sure John said that the dust devils rotated mostly clockwise but some went anticlockwise, only a few i think. There seems to be a few types of them and in the video john shot the big wide ones definatly have multiple voritcies in them, its quite easy to see on video. The smaller ones seem to be faster and taller tho. I have a report up on a dust devil that damaged homes here in perth back in 96. its at http://members.xoom.com/wastorms/willy.html Ira Fehlberg >Golly, darken the sky in the shot of that big one and you've got an F5! ;) >Love the fine structure to - do I see the DD equivalent of suction >vorticies in a few of those shots?? > >Phil 'Paisley' Bagust >paisley at cobweb.com.au >http://www.chariot.net.au/~paisley2 > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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------------------------------ 016 X-Sender: disarm at braenet.com.au (Unverified) X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Tue, 08 Feb 2000 19:46:48 +1100 To: aussie-weather at world.std.com From: Matt Smith [disarm at braenet.com.au] Subject: aus-wx: Macca's storm chase! Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Heya's Just got a call from Andrew Macdonald.. he is on a cell NE of Seymour, he can see a very nice cloud lowering (he is on the back end of the storm) which may be a possible wall cloud ! He also said he could see some rotation in the updraught as well. CG's were frequent whilst talking to him on the phone, but the lack of roads moving NE may cut his chase short.. see what happens anyway Matt Smith +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ 017 From: "Jane ONeill" [cadence at rubix.net.au] To: "Aussie Weather" [aussie-weather at world.std.com] Subject: aus-wx: Melbourne storms Date: Tue, 8 Feb 2000 21:19:38 +1100 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I've put a couple of video stills up from this afternoon just to remind you that Melbourne hasn't forgotten how to host a good-looking storm (or 8) - real pics are much better & Andrew has pics of a rotating wall cloud at his end of the line - he took the NW end & I took the SW....anyway, just to keep your interest, go to http://www.rubix.net.au/~cadence/8_2_00.htm Pics, radar etc up by the end of the weekend I hope. Enjoy, Jane ------------------------------------------------------- Jane ONeill ASWA - Victoria Australian Severe Weather Assocn (ASWA Inc.) Melbourne Storm Chasers Email: cadence at rubix.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------------------------------ 018 Date: Tue, 08 Feb 2000 09:42:41 +1100 From: peter matters [pmatters at eck.net.au] X-Mailer: Mozilla 4.7 [en] (Win98; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: VIC/NSW Storms Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all, Peter here. I have some vid cam shots of these storms taken from Broadford/Seymour. Will cut them and email them to Jane tomorrow. Cheers Didjman Matt Smith wrote: > Nice line of storms developing extending SE/NW across VIC at the moment, > and up into west NSW with some action down SE NSW south of Canberra as well. > > Matt Smith > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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------------------------------
Document: 000208.htm
Updated: 12 February 2000 |
[Australian Severe Weather index] [Copyright Notice] [Email Contacts] |