[Index]
Monthly Global Tropical Cyclone Tracks July 2009
[Summaries and Track Data] [Prepared by Gary Padgett]
| Tropical
Cyclones
[Index] |
Monthly Global Tropical Cyclone Tracks July 2009 [Summaries and Track Data] [Prepared by Gary Padgett] |
GLOBAL TROPICAL CYCLONE TRACKS - JULY 2009
!!!! IMPORTANT -- PLEASE SEE NOTE AT END OF FILE !!!!
JULY HIGHLIGHTS
---------------
--> Another rather quiet month--a few tropical storms, including one
hurricane and one typhoon in North Pacific
GLOBAL OVERVIEW
---------------
As was the case with June, no tropical cyclones nor significant
tropical LOWs formed in the Southern Hemisphere during July. The only
named storms formed in the North Pacific Ocean--two in the west and
four in the east. Tropical Storms Blanca and Dolores in the Eastern
North Pacific were similar, each forming a few hundred miles to the
south-southwest of Baja California and following northwesterly
trajectories into cooler waters and stable air. Both attained peak
estimated intensities of 45 kts. Hurricane Carlos formed on 10 July
very deep in the tropics near 10N/111W. Carlos moved westward at a low
latitude, never departing from the 10th parallel by more than half a
degree. The storm intensified into a 75-kt hurricane on 12 July before
somewhat mysteriously weakening to 45 kts on the 13th. However, Carlos
recovered and reached a peak intensity of 90 kts on 15 July.
Late in the month, Tropical Depression 06E formed just east of 140W
and moved westward into Honolulu's AOR, becoming Tropical Storm Lana
on 30 July. Lana followed a fairly straight westerly track which took
it well south of Hawaii, reaching a peak intensity of 55 kts late on
31 July before gradually weakening. According to the Wikipedia page
for the 2009 Eastern Pacific season, Lana is only the fourth Central
Pacific tropical cyclone since at least the early 1980s which initially
formed as an Eastern Pacific tropical depression. The others were
Tropical Storm Lala (TD-14E of 1984), Hurricane Iniki (TD-18E of 1992),
and Hurricane Li (TD-08E of 1994).
Three tropical cyclones developed in the Northwest Pacific basin
during July: one tropical depression, one tropical storm, and one
typhoon. The typhoon, Molave, was classified as a typhoon for only
one six-hour period by both JMA and JTWC. Thus, the month of July was
almost typhoon-less in the WestPac, something which hasn't happened since
1998. July of 1999 almost completely went by without a typhoon--Tropical
Storm Olga was upgraded to typhoon status on the final day of the month.
Tropical Storm Soudelor/Gorio pursued a straight west-northwesterly
track from a position several hundred miles northwest of Yap across the
northern tip of Luzon, Hainan Dao, and the Gulf of Tonkin before moving
into southern China. Soudelor was a minimal tropical storm which existed
in a sheared environment and was never able to generate sustained deep
convection around the LLCC. However, it was a prolific rainmaker,
producing upwards of 130 mm of rain in northern Luzon which resulted in
flash flooding and landslides. In the Philippines almost 20,000 people
were affected by the flooding and one person was killed with ten villages
being flooded by the storm. In China, torrential rains in Hainan caused
significant flooding that drowned 15 hikers and left several others
missing. Many roads were destroyed or cut off by landslides and
30 villages were inundated. In Vietnam, the storm also was responsible
for torrential rains with 250 mm being recorded in northern Vietnam and
130 mm in the city of Hanoi. Three persons were killed and thousands of
hectares of cropland were inundated.
Tropical Depression 06W formed on 11 July several hundred miles east
of the northern Philippines and moved on a northwesterly track which
carried it across southern Taiwan and into mainland China. PAGASA named
the system Huaning and upgraded it to tropical storm status on the 13th.
However, JMA and JTWC both treated the system as a 30-kt tropical
depression.
Tropical Storm Molave (named Isang by PAGASA) formed several hundred
miles east of Mindanao around mid-July. After moving initially westward,
the storm embarked on a northwesterly track east of the Philippines which
carried it to the Luzon Strait. The storm turned to a west-northwesterly
heading and intensified, reaching typhoon status shortly before making
landfall in southern China near Hong Kong. As noted above, both JMA and
JTWC classified Molave as a minimal typhoon for only a six-hour period
shortly before landfall. The Hong Kong Observatory also classified
Molave as a typhoon. According to the Wikipedia report, Molave/Isang
was responsible for four deaths.
In the North Indian Ocean basin, one system developed which was
classified as a deep depression by IMD. The system formed early on
20 July in the northern reaches of the Bay of Bengal. The depression
intensified into a deep depression during the day and moved west-
northwestward, moving inland during the evening between Balasore and
Digha. Maximum winds (3-min avg) were estimated at 30 kts.
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!!!!!!!!!!!!!!!!! EXTRA FEATURE !!!!!!!!!!!!!!!!!
REVIEW OF GLOBAL TROPICAL CYCLONE TERMINOLOGY
This extra feature is something which I've included on several
occasions, the last being in the April, 2005, summary. I have updated
a few items based upon changes in basic definitions.
The following is a synopsis of the operational terminology used by
the various TCWCs to describe the different stages of tropical cyclone
development and intensification. This gives the formal terminology
used to refer to a given cyclone in warnings, public advices, and
discussion bulletins. The adjective "severe" is used in several regions
with quite different meanings, and these are defined below if the term
is formally applied to designate an intensity range. In the U. S., the
term may be frequently used to describe the character of a hurricane,
but is not formally used as the descriptor for a given cyclone intensity
range.
In the Atlantic and Northeast Pacific basins, the Saffir/Simpson
Hurricane Wind Scale is utilized to further classify tropical cyclones
with winds exceeding hurricane intensity. This is the same as the older
Saffir/Simpson Scale but with the central pressure and storm surge
descriptors removed. Information on the scale may be found at the
following URL:
http://www.nhc.noaa.gov/aboutsshs.shtml>
The TCWCs in Australia and Fiji also employ a five-category scale to
further classify all tropical cyclones above gale force. The Australian
Cyclone Severity Scale is based upon the peak gusts expected to occur
within a cyclone. Information on this scale may be found at:
http://www.bom.gov.au/weather/cyclone/about/about-tropical-cyclones.shtml#severity>
1. ATLANTIC and NORTHEAST PACIFIC Basins - TPC/NHC (also CPHC)
MSW Averaging Period: 1 minute
Tropical Cyclone - generic term for systems of all intensities
Tropical Disturbance - distinct area of disturbed weather but
usually with no well-defined low-level circulation apparent/
regular advisories not issued/ usually corresponds to Dvorak
ratings less than T2.0
Tropical Depression - fairly well-defined low-level circulation/
MSW less than 34 kts/ Dvorak rating usually T2.0
Tropical Storm - MSW in range of 34-63 kts/ Dvorak rating T2.5,
T3.0, or T3.5
Hurricane - MSW exceeding 63 kts/ Dvorak rating T4.0 or higher
The point at which regular advisories are initiated is a little
subjective. A system with a Dvorak rating of T1.5 might be upgraded
to a tropical depression if it were in a position to affect a populated
area and/or if it seemed to be rapidly intensifying and its development
potential was considered excellent.
2. JTWC for NORTHWEST PACIFIC Basin Only
MSW Averaging Period: 1 minute
Tropical Cyclone - generic term for systems of all intensities
Tropical Disturbance - distinct area of disturbed weather but
usually with no well-defined low-level circulation apparent/
regular advisories not issued/ usually corresponds to Dvorak
ratings of T1.0 or less/ MSW generally less than 25 kts
Tropical Depression - fairly well-defined low-level circulation/
MSW 25-34 kts/ Dvorak rating usually T1.5 - T2.0
Tropical Storm - MSW in range of 34-63 kts/ Dvorak rating T2.5,
T3.0, or T3.5
Typhoon - MSW exceeding 63 kts/ Dvorak rating T4.0 or higher
Super typhoon - MSW reaching or exceeding 130 kts
3. JTWC for NORTH INDIAN OCEAN and SOUTHERN HEMISPHERE
MSW Averaging Period: 1 minute
For the North Indian Ocean and all Southern Hemisphere regions, JTWC
uses only the generic term "Tropical Cyclone" to refer to systems of all
intensities in warning status. Warnings are usually initiated when the
system is forecast to produce gale/tropical storm force winds within
48 hours. In many cases winds are already approaching this threshold
when the first warning is issued and frequently the initial MSW is set
at 35 kts.
4. NORTHWEST PACIFIC Basin - JMA (Japan)
MSW Averaging Period: 10 minutes
Tropical Cyclone - generic term for systems of all intensities
Low-pressure Area - distinct area of disturbed weather but
usually with no well-defined low-level circulation apparent/
regular warnings not issued
Tropical Depression - fairly well-defined low-level circulation/
MSW less than 34 kts
Tropical Storm - MSW in range of 34-47 kts/ Dvorak rating T2.5
or T3.0
Severe Tropical Storm - MSW in range of 48-63 kts/ Dvorak rating
T3.5 or T4.0
Typhoon - MSW exceeding 63 kts/ Dvorak rating T4.5 or higher
The Japanese Meteorological Agency (JMA) is the World Meteorological
Organization's (WMO) official Regional Specialised Meteorological
Centre (RSMC) for the Northwest Pacific Basin. While adhering to
a 10-min averaging period for MSW, JMA normally equates 34 kts to a
Dvorak rating of T2.5; thus, JMA and JTWC agree in principle on the
threshold of tropical storm intensity. However, for very intense
typhoons, JMA's MSW estimates are usually far below those assigned
by JTWC due to a much lower 1-min to 10-min conversion factor for
extreme intensities.
The meteorological services of other Asian nations issue tropical
cyclone warnings for portions of the Northwest Pacific region,
including the Philippines, Hong Kong, China, Vietnam, Taiwan, and
Korea. Warnings from these weather services are issued independently
of JMA but utilize the same terminology and are usually reasonably
close to JMA's positions and intensity estimates.
5. NORTH INDIAN OCEAN Basin - IMD (Indian Meteorological Department)
MSW Averaging Period: 3 minutes
Zone of disturbed weather - a zone in which the pressure is low
relative to the surrounding region and there are convective
cloud masses which are not organized
Low-pressure Area - an area enclosed by a closed isobar with mean
surface winds less than 17 kts
Depression - well-defined low-level circulation but with MSW
generally less than 28 kts/ Dvorak rating of T1.5
Deep Depression - depression with MSW in range of 28-33 kts/
Dvorak rating of T2.0
Cyclonic Storm - tropical cyclone with MSW in range of 34-47 kts/
Dvorak rating T2.5 - T3.0
Severe Cyclonic Storm - tropical cyclone with MSW in range of
48 - 63 kts/ Dvorak rating of T3.5
Very Severe Cyclonic Storm - tropical cyclone with MSW in the range
of 63 kts - 119 kts/ Dvorak rating T4.0 or higher
Super Cyclonic Storm - tropical cyclone with MSW 120 kts or higher
The Indian Meteorological Department (IMD) is the WMO's RSMC for
the North Indian Ocean (Bay of Bengal and Arabian Sea), although the
meteorological services of other nations may also issue warnings for
portions of the basin. The MSW values reported in warnings are
considered to be over a 3-min averaging period; however, IMD does not
modify the Dvorak scale.
6. SOUTHWEST INDIAN OCEAN Basin (West of 90E)
MSW Averaging Period: 10 minutes
Zone of Disturbed Weather - term used to describe weak, ill-defined
systems with winds generally less than 25 kts and corresponding
to Dvorak ratings of less than T2.0
Tropical Disturbance - MSW usually 25 kts near center/ Dvorak
rating usually T2.0 (Beaufort Force 6) / such systems usually
classified as tropical depressions by most TCWCs
Tropical Depression - MSW in range of 28-33 kts (Beaufort Force 7 -
Dvorak T2.5)
Moderate Tropical Storm - MSW in range of 34-47 kts/ Dvorak rating
of T3.0 - weak T3.5
Severe Tropical Storm - MSW in range of 48-63 kts/ Dvorak rating
of strong T3.5 - T4.0
Tropical Cyclone - MSW in range of 64-89 kts/ Dvorak rating of
T4.5 - T5.5
Intense Tropical Cyclone - MSW in range of 90-115 kts/ Dvorak
rating T6.0 - T6.5
Very Intense Tropical Cyclone - MSW exceeding 115 kts/ Dvorak
rating T7.0 - T8.0
The WMO's RSMC for the South Indian region is Meteo France on the
French island of La Reunion; however, names are actually assigned by the
Sub-regional Tropical Cyclone Advisory Centres on Mauritius (east of 55E)
and Madagascar (west of 55E). The La Reunion TCWC employs a conversion
factor of 0.88 to convert the 1-minute MSW Dvorak scale to an equivalent
10-minute average scale. (Prior to the 1999-2000 season, the conversion
factor used was 0.80.)
7. AUSTRALIAN REGION (longitude 90E eastward to longitude 160E)
MSW Averaging Period: 10 minutes
Tropical LOW - term is used to describe disturbances ranging from
diffuse, ill-defined low-pressure areas all the way to well-
organized tropical depressions with MSW up to 33 kts
Tropical Cyclone - MSW in range of 34-63 kts/ Dvorak rating ranging
from a strong T2.5/weak T3.0 to T4.0
Severe Tropical Cyclone - MSW exceeding 63 kts/ Dvorak T4.5 or
higher
Warnings in the Australian Region are issued by three separate TCWCs
at Brisbane (Queensland), Perth (Western Australia), and Darwin
(Northern Territory) with Darwin being the RSMC for the region. In
addition to these, a TCWC at Port Moresby, Papua New Guinea (formerly
an Australian territory) issues warnings for a small portion of the
region near and east of the island of New Guinea, and a TCWC at Jakarta,
Indonesia, issues warnings for the region west of 125E and north of
10S. The Papua New Guinea and Indonesian regions have an extremely low
incidence of tropical cyclone occurrences.
The Australian centres avoid use of the term "tropical depression" in
public advices primarily to reduce possible confusion with the use of
the term "depression" in association with extratropical systems; and
also possibly because until recently (early 1990's), in the Southwest
Indian Ocean Basin, a "tropical depression" meant any system with winds
up to 63 kts (hurricane force). The Australian TCWCs utilize a
conversion factor of 0.88 or 0.90 to modify the 1-minute Dvorak scale to
an equivalent 10-minute average scale.
In the Australian Region to qualify as a tropical cyclone a tropical
LOW must be accompanied by gales surrounding more than 50% of the center
of circulation for a period of at least six hours. In order to insure
that adequate warnings are provided, it is not at all unusual for a
system to be named as a tropical cyclone, but later reduced to tropical
LOW status after a careful post-storm analysis reveals that this spatial
distribution of gales criterion was not met, e.g., Isobel and Odette,
2007, and Gabrielle, 2009.
8. SOUTH PACIFIC Basin (east of longitude 160E)
MSW Averaging Period: 10 minutes
Tropical Disturbance - distinct area of disturbed weather but
usually with no well-defined low-level circulation apparent/
regular advisories not issued/ usually corresponds to Dvorak
ratings less than T2.0
Tropical Depression - fairly well-defined low-level circulation/
MSW less than 34 kts/ Dvorak rating usually T2.0 or weak T2.5
Tropical Cyclone - MSW exceeding 33 kts/ Dvorak rating of
strong T2.5/T3.0 to T4.0
Severe Tropical Cyclone - MSW exceeding 63 kts/ Dvorak T4.5 or
higher
The TCWC at Nadi, Fiji, is the RSMC for the South Pacific basin
but the meteorological service of New Zealand (Wellington) issues
warnings for systems that move (or very rarely form) south of latitude
25S. The Fiji TCWC employs a 1-minute to 10-minute MSW conversion
factor of 0.90 when adjusting the Dvorak scale.
A tropical system can have associated gales and still be classified
as a tropical depression if the gales are well-removed from the center.
In such cases the gales are usually found in only one or two quadrants.
Prior to 2000, the WMO Region V definition of a tropical cyclone required
that gales surround the center, but the definition was changed to allow
classification as a tropical cyclone if gales were present near the
center and likely to persist, even if in only one quadrant.
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NORTHEAST PACIFIC (NEP) - North Pacific Ocean East of Longitude 180
Sources of Information
----------------------
The track coordinates, central pressure and 1-minute average
maximum sustained wind values were obtained from the operational
forecast/advisories issued by the Tropical Prediction Center/National
Hurricane Center in Miami, Florida, for locations east of longitude
140W, and from the Central Pacific Hurricane Center in Honolulu,
Hawaii, for locations west of longitude 140W. A 1-minute averaging
period is the standard used by all U. S. civilian and military
warning services for tropical cyclone warnings.
Following is the link to the Wikipedia page for the 2009 Eastern
Pacific Hurricane Season:
http://en.wikipedia.org/wiki/2009_Pacific_hurricane_season>
Systems Tracked
---------------
Tropical Storm BLANCA (03E) 06 - 09 Jul
Hurricane CARLOS (04E) 10 - 16 Jul
Tropical Storm DOLORES (05E) 15 - 17 Jul
Tropical Storm LANA (06E) 30 Jul - 03 Aug
*************************************************************************
Storm Name: BLANCA Cyclone Number: 03E Basin: NEP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 06 0600 16.7 N 111.2 W 1006 30
09 JUL 06 1200 17.1 N 111.7 W 1004 35
09 JUL 06 1800 17.7 N 112.5 W 1000 40
09 JUL 07 0000 18.0 N 113.4 W 998 45
09 JUL 07 0600 18.3 N 114.1 W 998 45
09 JUL 07 1200 18.7 N 115.4 W 999 40
09 JUL 07 1800 19.5 N 116.2 W 1002 35
09 JUL 08 0000 20.1 N 117.3 W 1002 35
09 JUL 08 0600 20.6 N 118.5 W 1004 30
09 JUL 08 1200 20.8 N 119.6 W 1005 30
09 JUL 08 1800 21.1 N 120.5 W 1006 25
09 JUL 09 0000 21.4 N 121.4 W 1006 25
09 JUL 09 0300 21.5 N 121.9 W 1006 25
*************************************************************************
Storm Name: CARLOS Cyclone Number: 04E Basin: NEP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 10 0600 10.0 N 111.0 W 1007 25
09 JUL 10 1200 10.3 N 112.4 W 1007 30
09 JUL 10 1800 10.2 N 113.4 W 1005 35
09 JUL 11 0000 10.4 N 114.6 W 1000 45
09 JUL 11 0600 10.4 N 115.7 W 994 55
09 JUL 11 1200 10.3 N 116.3 W 994 55
09 JUL 11 1800 10.5 N 117.2 W 984 70
09 JUL 12 0000 10.5 N 118.4 W 980 75
09 JUL 12 0600 10.4 N 119.6 W 980 75
09 JUL 12 1200 10.4 N 120.4 W 984 70
09 JUL 12 1800 10.3 N 121.3 W 990 60
09 JUL 13 0000 10.2 N 122.3 W 994 50
09 JUL 13 0600 10.2 N 123.6 W 1000 45
09 JUL 13 1200 9.8 N 124.7 W 997 45
09 JUL 13 1800 9.5 N 125.6 W 994 55
09 JUL 14 0000 9.6 N 126.5 W 994 55
09 JUL 14 0600 9.7 N 126.9 W 994 55
09 JUL 14 1200 9.9 N 127.3 W 978 80 Upgraded at 1000Z
09 JUL 14 1800 10.0 N 127.9 W 978 85
09 JUL 15 0000 10.0 N 128.4 W 972 90
09 JUL 15 0600 10.1 N 128.8 W 972 90
09 JUL 15 1200 10.2 N 129.3 W 978 75
09 JUL 15 1800 10.1 N 130.4 W 994 55 Downgraded at 2100Z
09 JUL 16 0000 10.2 N 131.5 W 1000 45
09 JUL 16 0600 10.1 N 132.9 W 1004 25
09 JUL 16 1200 9.8 N 134.3 W 1005 25
09 JUL 16 1800 9.4 N 135.7 W 1007 25
09 JUL 16 2100 9.4 N 136.4 W 1007 25
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Storm Name: DOLORES Cyclone Number: 05E Basin: NEP
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 15 0000 13.5 N 113.5 W 1006 30
09 JUL 15 0600 13.9 N 114.2 W 1006 30
09 JUL 15 1200 14.6 N 115.1 W 1005 35 Upgraded at 1500Z
09 JUL 15 1800 15.9 N 116.1 W 1003 40
09 JUL 16 0000 16.7 N 116.9 W 1000 45
09 JUL 16 0600 17.8 N 118.4 W 1000 45
09 JUL 16 1200 18.5 N 119.7 W 1002 35
09 JUL 16 1800 19.0 N 121.9 W 1006 25
09 JUL 17 0000 19.4 N 123.4 W 1006 25
09 JUL 17 0300 19.6 N 124.1 W 1006 25
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Storm Name: LANA Cyclone Number: 06E Basin: NEP
(Name assigned by CPHC, Honolulu)
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 30 1200 11.9 N 138.9 W 1008 30
09 JUL 30 1800 12.1 N 140.6 W 1005 35
09 JUL 31 0000 12.6 N 142.3 W 998 50
09 JUL 31 0600 13.0 N 143.9 W 997 50
09 JUL 31 1200 13.4 N 145.5 W 1000 45
09 JUL 31 1800 13.6 N 147.0 W 995 55
09 AUG 01 0000 14.0 N 148.5 W 1004 45
09 AUG 01 0600 14.3 N 149.5 W 1004 45
09 AUG 01 1200 14.6 N 151.0 W 1004 45
09 AUG 01 1800 14.4 N 152.6 W 1008 45
09 AUG 02 0000 14.4 N 154.4 W 1008 45
09 AUG 02 0600 14.4 N 155.9 W 1008 45
09 AUG 02 1200 14.4 N 157.4 W 1008 45
09 AUG 02 1800 14.4 N 158.3 W 1008 45
09 AUG 03 0000 14.4 N 160.1 W 1010 30
09 AUG 03 0600 14.5 N 161.4 W 1010 30
09 AUG 03 1200 14.8 N 162.9 W 1010 25
09 AUG 03 1500 14.9 N 163.6 W 1010 25
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NORTHWEST PACIFIC (NWP) - North Pacific Ocean West of Longitude 180
Sources of Information
----------------------
The track coordinates and 1-minute average maximum sustained wind
values in general were taken from operational warnings issued by the
Joint Typhoon Warning Center (JTWC) of the U. S. Air Force and Navy,
located at Pearl Harbor, Hawaii. The central pressure and 10-minute
average maximum sustained wind estimates for most systems were obtained
from warnings issued by the Japanese Meteorological Agency (JMA), which
is the World Meteorological Organization's Regional Specialised Meteor-
ological Centre for the basin. In a few instances, information from
warnings issued by other Asian warning centers may have been utilized.
The center position coordinates from JMA and other centers were com-
pared with those from JTWC and annotations made in the Remarks column
when the differences in general amounted to 40-50 nm or more.
Michael V. Padua of Naga City in the Philippines, owner of the
Typhoon 2000 website, sends me cyclone tracks based upon warnings
issued by the Japanese Meteorological Agency and the Philippines'
Atmospheric, Geophysical & Astronomical Services Administration
(PAGASA). A special thanks to Michael for his efforts.
Following is the link to the Wikipedia page for the 2009 Pacific
Typhoon Season. A detailed report for Tropical Storm Soudelor/Gorio
is available.
http://en.wikipedia.org/wiki/2009_Pacific_typhoon_season>
Following are links to Michael Padua's storm logs for the July
NWP systems:
http://www.typhoon2000.ph/stormarchives/2009/stormlogs/07gorio09_log.htm>
http://www.typhoon2000.ph/stormarchives/2009/stormlogs/08huaning09_log.htm>
http://www.typhoon2000.ph/stormarchives/2009/stormlogs/09isang09_log.htm>
http://www.maybagyo.ph/stormarchives/2009/stormlogs/07gorio09_log.htm>
http://www.maybagyo.ph/stormarchives/2009/stormlogs/08huaning09_log.htm>
http://www.maybagyo.ph/stormarchives/2009/stormlogs/09isang09_log.htm>
Systems Tracked
---------------
Tropical Storm SOUDELOR (05W / 0905 / GORIO) 09 - 12 Jul
Tropical Depression (06W / HUANING) 11 - 14 Jul
Typhoon MOLAVE (07W / 0906 / ISANG) 14 - 19 Jul
*************************************************************************
Storm Name: SOUDELOR Cyclone Number: 05W Basin: NWP
PAGASA Internal Name: GORIO JMA Tropical Storm Number: 0905
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 09 0600 18.2 N 125.6 E 1000 30 PAGASA warnings
09 JUL 09 1200 18.2 N 124.3 E 1000 30
09 JUL 09 1800 18.5 N 122.3 E 1000 25 30 PAGASA: 19.2N/121.2E
09 JUL 10 0000 18.7 N 120.7 E 1000 30 30 PAGASA: 18.8N/118.6E
09 JUL 10 0600 19.2 N 119.8 E 1000 30 10-min MSW from JMA
09 JUL 10 1200 19.4 N 119.1 E 1000 30 30
09 JUL 10 1800 19.5 N 117.5 E 998 30 30 JMA: 19.5N/116.7E
09 JUL 11 0000 19.7 N 115.7 E 998 35 30
09 JUL 11 0600 20.2 N 114.0 E 996 30 35
09 JUL 11 1200 20.2 N 112.8 E 996 30 35
09 JUL 11 1800 20.0 N 112.0 E 996 35 35
09 JUL 12 0000 20.4 N 110.4 E 996 30 35
09 JUL 12 0600 20.7 N 108.6 E 998 25 35
09 JUL 12 1200 21.0 N 107.0 E 998 30 JMA bulletin/Inland
*************************************************************************
Storm Name: None Cyclone Number: 06W Basin: NWP
PAGASA Internal Name: HUANING JMA Tropical Storm Number: None
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 11 0000 16.0 N 129.0 E 1006 25 JMA bulletins
09 JUL 11 0600 17.0 N 130.0 E 1006 25
09 JUL 11 1200 18.0 N 129.0 E 1006 25
09 JUL 11 1800 18.0 N 128.0 E 1006 25
09 JUL 12 0000 18.8 N 126.8 E 1000 30 PAGASA warnings
09 JUL 12 0600 19.7 N 125.4 E 1000 30
09 JUL 12 1200 20.6 N 124.3 E 1000 30 JMA: 20.0N/125.5E
09 JUL 12 1800 22.1 N 122.9 E 1000 30 JMA: 20.0N/124.4E
09 JUL 13 0000 22.1 N 122.5 E 1000 25 30 JMA: 21.2N/122.4E
09 JUL 13 0600 22.8 N 121.3 E 1000 30 30 See Note
09 JUL 13 1200 23.6 N 119.8 E 1000 25 30 JMA: 23.1N/119.4E
09 JUL 13 1800 24.2 N 119.4 E 1000 30 30 JMA: 23.7N/118.8E
09 JUL 14 0000 26.0 N 119.0 E 1002 25 25 JMA: 26.0N/118.0E
Note: PAGASA upgraded Huaning to a 35-kt tropical storm at 13/0000 UTC.
Since neither JTWC nor JMA upgraded this system at that time to tropical
storm status, beginning with 13/0000 UTC the 10-min avg MSW values in the
above track are taken from JMA's warnings.
*************************************************************************
Storm Name: MOLAVE Cyclone Number: 07W Basin: NWP
PAGASA Internal Name: ISANG JMA Tropical Storm Number: 0906
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 14 0000 9.0 N 133.0 E 1006 25 JMA bulletin
09 JUL 14 0600 9.2 N 131.2 E 1000 30 PAGASA warnings
09 JUL 14 1200 10.5 N 130.2 E 1000 30
09 JUL 14 1800 11.8 N 129.4 E 1000 30 JMA: 12.0N/131.0E
09 JUL 15 0000 14.5 N 127.6 E 1000 30 JMA: 13.0N/129.0E
09 JUL 15 0600 14.6 N 127.7 E 1002 25 30
09 JUL 15 1200 15.2 N 127.5 E 1000 25 30 JMA: 14.7N/127.2E
09 JUL 15 1800 15.7 N 126.6 E 998 35 30 JMA: 14.7N/126.4E
09 JUL 16 0000 16.5 N 125.9 E 998 35 30 JMA: 16.1N/125.2E
09 JUL 16 0600 17.0 N 125.1 E 998 35 30
09 JUL 16 1200 17.5 N 124.5 E 996 35 35
09 JUL 16 1800 18.5 N 124.2 E 994 35 40 JMA: 17.9N/123.9E
09 JUL 17 0000 18.5 N 123.3 E 992 45 45
09 JUL 17 0600 19.5 N 122.5 E 985 45 50
09 JUL 17 1200 20.6 N 121.2 E 975 60 60
09 JUL 17 1800 21.0 N 119.2 E 975 60 60
09 JUL 18 0000 21.3 N 118.3 E 975 60 60
09 JUL 18 0600 21.7 N 117.2 E 975 55 60
09 JUL 18 1200 22.3 N 115.9 E 975 65 65
09 JUL 18 1800 22.5 N 114.0 E 980 60 60 Moving inland in China
09 JUL 19 0000 23.0 N 112.4 E 990 40 40
09 JUL 19 0600 23.0 N 111.0 E 994 30 JMA bulletin
Note: PAGASA upgraded Isang to tropical storm status at 15/1200 UTC.
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NORTH INDIAN OCEAN (NIO) - Bay of Bengal and Arabian Sea
Sources of Information
----------------------
The track coordinates and 1-minute average maximum sustained wind
values in general were taken from operational warnings issued by the
Joint Typhoon Warning Center (JTWC) of the U. S. Air Force and Navy,
located at Pearl Harbor, Hawaii. Occasionally some information may
have been gleaned from the daily tropical weather outlooks and other
bulletins issued by the Indian Meteorological Department (IMD), which
is the World Meteorological Organization's Regional Specialised Meteor-
ological Centre for the basin.
The reported maximum sustained winds are based on a 1-minute
averaging period, which is used by all U. S. civilian and military
weather services for tropical cyclone warnings. For synoptic
observations in the North Indian Ocean region, both 10-minute and
3-minute average winds are employed, but IMD makes no attempt to
modify the Dvorak scale for estimating tropical cyclone intensity;
hence, a 1-minute average MSW is implied.
SPECIAL NOTE!!! I have changed the header in the second MSW column
to reflect a 3-min avg MSW. This is what the India Meteorological
Department uses as their standard. They do not modify the Dvorak
scale, but consider the reported MSW to be a 3-min avg. The
difference between a true 1-min avg MSW and 3-min avg MSW would be
expected to be essentially negligible. I made this change in order
to have a column available to report IMD's intensity estimates, out
of consideration for the fact that the office is the WMO's official
RSMC for the North Indian Ocean basin. For the Northwest Pacific
basin and the entire Southern Hemisphere, the 10-min avg MSW column
provides a place to report the RSMC's intensity estimate for comparison
purposes with JTWC's 1-min avg MSW.
Following is the link to the Wikipedia page for the 2009 North
Indian Ocean Cyclone Season:
http://en.wikipedia.org/wiki/2009_North_Indian_Ocean_cyclone_season>
Systems Tracked
---------------
Deep Depression 20 Jul
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Storm Name: None Cyclone Number: None Basin: NIO
(System classified as a 'deep depression' by IMD)
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 3-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
09 JUL 20 0300 21.0 N 88.5 E 992 25
09 JUL 20 1200 21.0 N 88.0 E 988 30
09 JUL 20 1800 21.6 N 87.2 E 992 30 Just inland
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SOURCES OF TROPICAL CYCLONE INFORMATION
The purpose of this section is to list some websites where many and
varied types of tropical cyclone information are archived. Many readers
will know about these already, but for the benefit of those who don't,
I wanted to include them.
(1) Aircraft Reconnaissance Information
---------------------------------------
Various types of messages from reconnaissance aircraft may be
retrieved from the following FTP site:
ftp://ftp.nhc.noaa.gov/pub/products/nhc/recon/>
Information regarding how to interpret the coded reconnaissance
messages may be found at the following URL:
http://www.nhc.noaa.gov/reconlist.shtml>
Links are also included to websites with further information about the
U. S. Air Force 53rd Weather Reconnaissance Squadron and the NOAA Air-
craft Operations Center.
(2) Archived Advisories
-----------------------
All the advisory products (public advisories, forecast/advisories,
strike probabilities, discussions, various graphics) issued by TPC/NHC
are archived on TPC's website. For the current year (using 2004 as an
example), the archived products can be found at:
http://www.nhc.noaa.gov/archive/2004/index.shtml>
Links to tropical products archives for earlier years are available at
the following URL:
http://www.nhc.noaa.gov/pastall.shtml>
JTWC warnings for past storms are archived on the NRL Monterrey website:
http://www.nrlmry.navy.mil/tc_pages/tc_home.html>
On the NRL site, the link to past years can be found in the upper left
corner of the screen.
I am not aware at the moment of any other TCWC which archives all
its tropical cyclone warning/advisory products for public access, but
if I learn of any, I will add them to this list.
(3) Satellite Imagery
---------------------
Satellite images of tropical cyclones in various sensor bands are
available on the NRL Monterrey and University of Wisconsin websites,
courtesy of Jeff Hawkins and Chris Velden and their associates. The
links are:
http://www.nrlmry.navy.mil/tc_pages/tc_home.html>
http://cimss.ssec.wisc.edu/tropic/tropic.html>
On the NRL site, the link to past years can be found in the upper left
corner of the screen. For the CIMSS site, a link to data archives is
located in the lower left portion of the screen.
Additional tropical satellite imagery, along with looping ability for
composite microwave imagery for the Western Hemisphere north of the
equator, can be found at:
(1) For the Eastern North Pacific:
http://www.ssd.noaa.gov/PS/TROP/trop-epac.html>
(2) For the Atlantic, Gulf of Mexico and Caribbean Sea:
http://www.ssd.noaa.gov/PS/TROP/trop-atl.html>
(4) Cyclone Tracking Information
--------------------------------
There is a U. S. Navy site that tracks tropical cyclones at 6-hourly
intervals which often includes pre and post-advisory positions. The
link to the site is:
http://www.nrlmry.navy.mil/atcf_web/doc_archives/>
Steve Young has compiled many of these tracks onto a single webpage
which is very user-friendly:
http://home.earthlink.net/~shy9/tc1.htm>
*************************************************************************
*************************************************************************
!!!!!! IMPORTANT NOTE - PLEASE READ !!!!!!
To repeat the caveat which is included in the Author's Note
at the end of the cyclone summaries--the tropical cyclone tracks
I prepare are based upon the operational warnings/advisories/
advices/bulletins which are issued by the various tropical cyclone
warning agencies around the world. Users of these tracks should
be aware that they are preliminary and subject to revision during
post-seasonal analyses of the cyclones by the forecasters and
analysts at the several warning centers.
For the Atlantic and Northeast Pacific basins, official tropical
cyclone reports and "best tracks" can be found at the website of
the Tropical Prediction Center/National Hurricane Center:
http://www.nhc.noaa.gov>
The Joint Typhoon Warning Center's website contains links to their
Annual Tropical Cyclone Reports which include that agency's "best
tracks" for tropical cyclones in the Northwest Pacific basin, the
North Indian Ocean, and the Southern Hemisphere:
https://metocph.nmci.navy.mil/jtwc.php>
SPECIAL NOTE: Back issues of the global tropical cyclone summaries
and monthly cyclone track files can be obtained at the following
websites:
ftp://ftp.aoml.noaa.gov/hrd/pub/landsea/padgett/>
http://australiasevereweather.com/cyclones/>
http://www.typhoon2000.ph>
http://mpittweather.com>
PREPARED BY:
Gary Padgett [email protected]
SIGNIFICANT CONTRIBUTIONS BY:
Michael V. Padua [email protected]
[email protected]
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Document: trak0907.htm
Updated: 26th August 2009 |
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