[Index]
Southern Hemisphere 2007-2008 Tropical Cyclone Season Review
[Summaries and Track Data] [Prepared by Gary Padgett]
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Cyclones
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Southern Hemisphere 2007-2008 Tropical Cyclone Season Review [Summaries and Track Data] [Prepared by Gary Padgett] |
A REVIEW OF THE 2007-2008 TROPICAL CYCLONE SEASON
FOR THE SOUTHERN HEMISPHERE
Following is a tabular summary of all the tropical depressions
and tropical cyclones which occurred in the Southern Hemisphere
between 1 July 2007 and 30 June 2008 as reported in the Monthly
Global Tropical Cyclone Summaries prepared by the author.
(1) Number - this is the sequential cyclone number assigned by JTWC
in Hawaii.
(2) Name - the name (if any) assigned by the responsible Tropical
Cyclone Warning Centre. For systems in the South Indian Ocean
west of 90E and in the Southwest Pacific east of 160E which were
unnamed, the alphanumeric designator applied by La Reunion or
Fiji, respectively, is given in this column.
(3) Dates - range of dates for which tracking information for the
cyclone is available in the Global Tropical Cyclone Tracks files
prepared by the author. The dates given in most cases refer to
the time the system was in warning status and generally do not
include the pre-depression stages of the disturbance.
(4) Pressure - Lowest central pressure (either estimated or recorded)
during the lifetime of the cyclone. An asterisk (*) following
the pressure indicates the reading was an actual measured
pressure. Central pressure is given in millibars, which is
numerically equivalent to hectopascals.
(5) MSW 1-min avg - maximum 1-minute average sustained windspeed in
knots as assigned by JTWC. An asterisk (*) following the MSW
indicates that it was an actual measured value.
(6) MSW 10-min avg - maximum 10-minute average sustained windspeed
in knots as assigned by the responsible Tropical Cyclone Warning
Centre. An asterisk (*) following the MSW indicates that it was
an actual measured value.
(7) Basins - tropical cyclone basins where the cyclone tracked during
its life:
SWI - Southwest Indian Ocean - West of 90E
AUW - Northwest Australia/Southeast Indian Ocean - 90E to 135E
AUE - Northeast Australia/Coral Sea - 135E to 160E
SPA - South Pacific Ocean - East of 160E
SAT - South Atlantic Ocean
A number in parentheses (e.g. (1) ) following an entry refers to
a note following the entries for the given basin. A separate table
is given for each of the four Southern Hemisphere basins.
Abbreviations for Tropical Cyclone Warning Centres:
JTWC - Joint Typhoon Warning Center, formerly on Guam, now at
Pearl Harbor, Hawaii
MFR - Meteo France Reunion (RSMC La Reunion)
RSMC - Regional Specialised Meteorological Centre
************************************************************************
SOUTHWEST INDIAN OCEAN
JTWC NAME DATES CENT MSW MSW BASIN
NUM PRS 1-MIN 10-MIN
(mb) (kts) (kts)
------------------------------------------------------------------------
--- ----- 21-24 Jul --- 30 -- SWI (1)
01S ----- 27-31 Jul 992 35 40 SWI/AUW (2)
--- (MFR-01) 11-14 Oct 1005 30 25 SWI (3)
04S Bongwe 17-24 Nov 976 65 60 SWI (4)
06S Celina 12-21 Dec 992 35 40 SWI
07S Dama 18-21 Dec 995 50 35 SWI
09S Elnus 30 Dec-05 Jan 994 40 35 SWI
13S Fame 24 Jan-01 Feb 972 80 65 SWI (5)
14S Gula 26 Jan-03 Feb 950 85 85 SWI (6)
16S Hondo 04-25 Feb 906 125 120 SWI
18S Ivan 07-22 Feb 930 115 100 SWI
22S Jokwe 04-15 Mar 930 100 105 SWI
23S Kamba 07-12 Mar 930 110 100 SWI
25S Lola 20-26 Mar 994 45 35 SWI
NOTES:
(1) No warnings were issued by any agency for this system. JTWC
rendered one Dvorak rating of T2.5/2.5, but intensity estimates
from SAB were at T2.5/2.5 for about 24 hours, suggesting that the
system was as least a strong tropical depression and possibly a
minimal tropical storm based on a 1-min avg criterion.
(2) Meteo France issued no warnings on this system. BoM Perth in real
time assigned a peak MSW of 30 kts, but in post-storm analysis the
intensity was upped to 40 kts based upon QuikScat data. Therefore,
the system is now officially considered as an unnamed tropical
cyclone.
(3) JTWC issued no warnings on this system--in the track I prepared I
obtained the 1-min avg MSW values from the JTWC and SAB satellite
fix bulletins.
(4) JTWC's estimated peak 1-min avg MSW of 65 kts was at 19/1800 UTC,
at which time MFR was reporting 50 kts (10-min avg). MFR's peak
10-min avg MSW of 60 kts occurred at 22/0600 UTC, at which time
JTWC was reporting a 1-min avg MSW of 55 kts.
(5) The highest 10-min avg MSW assigned by MFR was 60 kts at 27/0600 and
1200 UTC. The MFR warning issued at 27/1800 UTC, after the center
had moved inland in Madagascar, indicated that Fame had briefly
reached the tropical cyclone stage with winds of 65 kts shortly
before moving onshore.
(6) In the JMV file, JTWC has upped Gula's peak 1-min avg MSW to 100 kts.
************************************************************************
NORTHWEST AUSTRALIA / SOUTHEAST INDIAN OCEAN
JTWC NAME DATES CENT MSW MSW BASIN
NUM PRS 1-MIN 10-MIN
(mb) (kts) (kts)
------------------------------------------------------------------------
03S Lee-Ariel 13-22 Nov 980 65 50 AUW/SWI (1)
08S Melanie 27 Dec-02 Jan 964 60 60 AUW
--- ----- 31 Dec-02 Jan 994 -- 30 AUW
10S Helen 03-06 Jan 975 45 50 AUW
17S ----- 04-10 Feb 992 40 30 AUW (2)
19S Nicholas 12-20 Feb 944 80 80 AUW
21S Ophelia 27 Feb-07 Mar 972 65 60 AUW
26S Pancho 24-30 Mar 938 95 90 AUW
28S Rosie 20-25 Apr 980 45 50 AUW
29S Durga 22-25 Apr 988 40 40 AUW (3)
NOTES:
(1) TC Lee formed in the Australian Region and moved westward into the
Southwest Indian Ocean basin, where it was renamed Arial by Mauritius.
Both BoM Perth and Metro France estimated the peak 10-min avg MSW at
50 kts.
(2) BoM Perth forecast peripheral gales for this system, but it was not
named as it did not meet the structural requirements for a tropical
cyclone that gales be wrapped around more than 50% of the center for
at least six hours.
(3) TC Durga formed north of 10S in the AOR of the Jakarta TCWC, which
became operational in January, 2008, and was the first cyclone to be
named by that agency.
************************************************************************
NORTHEAST AUSTRALIA / CORAL SEA
JTWC NAME DATES CENT MSW MSW BASIN
NUM PRS 1-MIN 10-MIN
(mb) (kts) (kts)
------------------------------------------------------------------------
02P Guba 12-19 Nov 970 75 75 AUE (1)
--- ----- 27 Dec-04 Jan 995 -- 50 AUE (2)
--- ----- 11-13 Feb --- -- 50 AUE (3)
20P ----- 28 Feb-01 Mar 999 35 30 AUE (4)
NOTES:
(1) The name Guba was assigned by the TCWC at Port Moresby, Papua New
Guinea.
(2) This LOW was not a tropical cyclone, but was perhaps at least
partially a hybrid system.
(3) System was not a tropical cyclone but rather a vigorous monsoon LOW.
(4) Brisbane treated this system as a tropical LOW with peripheral gales.
JTWC issued only two warnings, and the significant deltas between
JTWC's and Brisbane's center fixes suggest that JTWC was perhaps
following a different LLCC.
************************************************************************
SOUTH PACIFIC OCEAN
JTWC NAME DATES CENT MSW MSW BASIN
NUM PRS 1-MIN 10-MIN
(mb) (kts) (kts)
------------------------------------------------------------------------
--- (03F) 24 Nov-02 Dec 999 -- 30 SPA (1)
05P Daman 03-10 Dec 925 105 105 SPA (2)
--- (05F) 10-16 Dec 1000 -- 30 SPA (3)
11P Elisa 07-12 Jan 980 45 50 SPA
--- (08F) 09-14 Jan 998 -- 25 SPA
--- (09F) 12-13 Jan 999 -- 25 SPA
12P Funa 15-20 Jan 930 105 95 SPA
--- (11F) 19-24 Jan 992 -- 30 SPA (4)
15P Gene 26 Jan-09Feb 945 100 85 SPA
24P (14F) 19-23 Mar 998 35 30 SPA
--- (15F) 04-07 Apr 1002 -- 30 SPA (3)
27P (16F) 17-19 Apr 998 35 30 SPA (5)
NOTES:
(1) Dvorak satellite intensity estimates on 1 December reached T2.5/2.5
from JTWC and T3.0/3.0 from SAB, suggesting that the system was
possibly a minimal tropical storm based on a 1-min avg MSW criterion.
(2) Dr. Karl Hoarau estimates that Daman reached a peak 1-min avg MSW of
130 kts at 1800 UTC 6 December.
(3) Some peripheral gales associated with this system.
(4) System was a large, monsoon-gyre circulation with an extensive area
of peripheral gales at times reaching storm force. A Brisbane
bulletin on the 22nd noted that the system was similar to the famous
June, 1994, storm which destroyed a cruising fleet.
(5) Dvorak ratings from CPHC and Brisbane reached T3.0/3.0 early on the
18th. JTWC's ratings peaked at T2.5/2.5 at 17/2330 UTC and were
coming down by 18/0530 UTC. The highest noted from SAB was T2.0/2.0.
The satellite intensity estimates from CPHC and Brisbane seem to
support this system being a minimal "10-min avg" tropical cyclone.
RSMC Nadi did forecast peripheral gales for the system.
************************************************************************
Prepared by Gary Padgett
E-mail: [email protected]
Home Phone: 334-222-5327
|
Document: summ2007-2008.htm
Updated: 19th November 2008 |
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