[Index]
Monthly Global Tropical Cyclone Tracks April 2011
[Summaries and Track Data] [Prepared by Gary Padgett]
| Tropical
Cyclones
[Index] |
Monthly Global Tropical Cyclone Tracks April 2011 [Summaries and Track Data] [Prepared by Gary Padgett] |
GLOBAL TROPICAL CYCLONE TRACKS - APRIL 2011
!!!! IMPORTANT -- PLEASE SEE INFORMATION AT END OF FILE !!!!
*************************************************************************
ATLANTIC (ATL) - North Atlantic Ocean, Caribbean Sea, Gulf of Mexico
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 located in Miami, Florida. A 1-minute averaging
period is the standard used by all U. S. civilian and military
warning services for tropical cyclone warnings.
Systems Tracked
---------------
Possible Subtropical LOW (Invest 91L) 20 - 24 Apr
*************************************************************************
Storm Name: None Cyclone Number: None Basin: ATL
(Identified aS NRL Invest 91L)
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 20 0600 21.0 N 59.3 W 1012 NCEP reanalysis
11 APR 20 1200 21.3 N 50.9 W 1014
11 APR 20 1800 21.4 N 62.0 W 1012 35 SAT=ST1.5 (NRL winds)
11 APR 21 0000 21.1 N 64.0 W 1012
11 APR 21 0600 21.6 N 63.9 W 1011 35
11 APR 21 1200 21.8 N 63.4 W 1011 35
11 APR 21 1800 22.7 N 63.6 W 1012 35
11 APR 22 0000 24.5 N 62.7 W 1012 35
11 APR 22 0600 25.0 N 62.7 W 1010 SAT=ST1.5
11 APR 22 1200 25.3 N 62.9 W 1010 30 SAT=ST1.5
11 APR 22 1800 26.1 N 63.2 W 1010 35 SAT=ST1.5
11 APR 23 0000 25.0 N 63.2 W 1011
11 APR 23 0600 24.9 N 64.7 W 1011
11 APR 23 1200 23.5 N 65.1 W 1012
11 APR 23 1800 22.3 N 66.4 W 1013
11 APR 24 0000 22.1 N 67.6 W 1013
11 APR 24 0600 22.0 N 68.8 W 1014
11 APR 24 1200 21.4 N 70.0 W Open wave
11 APR 24 1800 21.3 N 72.7 W
Note: Although the NHC considered this an extratropical cyclone, the NOAA
Satellite and Information Service classified this as a subtropical
system of ST=1.5. NRL also reorted winds of 35 kts.
Thanks to Steve Young for sending me the information on Invest 91L.
The above track was based on NCEP reanalysis data. Following is the
track from NRL from 20-22 April:
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 20 1800 23.2 N 60.8 W 35
11 APR 21 0600 23.3 N 62.5 W 35
11 APR 21 1200 23.6 N 62.9 W 35
11 APR 21 1800 24.4 N 63.0 W 35
11 APR 22 0000 25.3 N 63.0 W 35
11 APR 22 1200 26.9 N 62.9 W 30
11 APR 22 1800 26.5 N 64.0 W 35
*************************************************************************
*************************************************************************
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 2011 Pacific
Typhoon Season:
http://en.wikipedia.org/wiki/2011_Pacific_typhoon_season>
Following are links to Michael Padua's storm logs for the April
tropical systems:
http://www.typhoon2000.ph/stormarchives/2011/stormlogs/outsidePAR/01W11_log.htm>
http://www.typhoon2000.ph/stormarchives/2011/stormlogs/01amang11_log.htm>
Systems Tracked
---------------
Tropical Depression (01W) 31 Mar - 04 Apr
Tropical Depression (02W / AMANG) 03 - 07 Apr
*************************************************************************
Storm Name: None Cyclone Number: 01W Basin: NWP
PAGASA Internal Name: None JMA Tropical Storm Number: None
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 MAR 31 1800 9.0 N 112.0 E 1008 20 Low pressure area
11 APR 01 0000 9.0 N 112.0 E 1004 25 JMA bulletins
11 APR 01 0600 9.0 N 111.0 E 1004 25
11 APR 01 1200 9.0 N 112.0 E 1004 25
11 APR 01 1800 9.0 N 111.0 E 1004 25
11 APR 02 0000 9.3 N 111.3 E 1006 25 30 JMA: 8.7N/111.3E
11 APR 02 0600 9.3 N 111.2 E 1004 25 30
11 APR 02 1200 9.2 N 111.1 E 1004 25 30 JMA: 9.5N/111.7E
11 APR 02 1800 9.5 N 111.6 E 1006 30 30
11 APR 03 0000 9.3 N 111.8 E 1006 30 30
11 APR 03 0600 9.1 N 111.7 E 1004 25 30 JMA: 9.1N/111.7E
11 APR 03 1200 9.0 N 112.4 E 1004 30 JMA bulletins
11 APR 03 1800 9.0 N 113.0 E 1006 25
11 APR 04 0000 8.0 N 113.0 E 1008 25
11 APR 04 0600 8.0 N 114.0 E 1008 25
*************************************************************************
Storm Name: None Cyclone Number: 02W Basin: NWP
PAGASA Internal Name: AMANG JMA Tropical Storm Number: None
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 03 0000 11.0 N 130.0 E 1004 20 Low pressure
11 APR 03 0600 9.6 N 131.7 E 1002 30 JMA bulletins
11 APR 03 1200 10.1 N 132.2 E 1002 30
11 APR 03 1800 11.0 N 132.8 E 1000 30
11 APR 04 0000 11.6 N 133.4 E 1002 30
11 APR 04 0600 12.6 N 134.5 E 1002 30
11 APR 04 1200 12.9 N 135.8 E 1002 30
11 APR 04 1800 13.8 N 137.1 E 1002 30
11 APR 05 0000 15.4 N 139.1 E 1002 30 30 JTWC Warnings
11 APR 05 0600 16.1 N 141.1 E 1002 30 30
11 APR 05 1200 16.5 N 143.0 E 1002 30 25 Becoming XT
11 APR 05 1800 17.0 N 145.0 E 1002 30 25 JMA: 16.0N/144.0E
11 APR 06 0000 17.6 N 146.8 E 1004 25 25 JMA: 17.0N/147.0E
11 APR 06 0600 17.0 N 148.0 E 1004 25 JMA bulletins
11 APR 06 1200 17.0 N 149.0 E 1004 25
11 APR 06 1800 18.0 N 151.0 E 1004 Extratropical
11 APR 07 0000 19.0 N 152.0 E 1008
*************************************************************************
*************************************************************************
SOUTHWEST INDIAN OCEAN (SWI) - South Indian Ocean West of Longitude 90E
Sources of Information
----------------------
The track coordinates as well as the central pressure and 10-minute
average maximum sustained wind estimates were obtained from warnings
issued by Meteo France's Tropical Cyclone Warning Centre on Reunion
Island (MFR), which is the World Meteorological Organization's Regional
Specialised Meteorological Centre for the basin. The 1-minute average
maximum sustained wind estimates were taken from warnings issued by the
Joint Typhoon Warning Center (JTWC) of the U. S. Air Force and Navy,
located at Pearl Harbor, Hawaii. The center position coordinates from
JTWC were compared with those from MFR and annotations made in the
Remarks column when the differences in general amounted to 40-50 nm
or more.
Following is the link to the Wikipedia page for the 2010-2011
Southwest Indian Ocean Cyclone Season:
http://en.wikipedia.org/wiki/2010%E2%80%9311_South-West_Indian_Ocean_cyclone_season>
Systems Tracked
---------------
Subtropical Depression (MFR-09) 12 - 17 Apr
*************************************************************************
Storm Name: None Cyclone Number: None Basin: SWI
MFR Tropical Disturbance Number: 09 (NRL Invest 94S)
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 12 0000 24.9 S 50.3 E 1007 NRL pressures
11 APR 12 0600 25.0 S 50.2 E 1007
11 APR 12 1200 24.8 S 50.2 E 1006
11 APR 12 1800 25.2 S 50.1 E 1007
11 APR 13 0000 25.1 S 49.9 E 1007
11 APR 13 0600 25.6 S 50.0 E 1007
11 APR 13 1200 27.9 S 48.6 E 1001 40 Initial MFR warning
11 APR 13 1800 28.6 S 48.7 E 1000 40
11 APR 14 0000 29.1 S 48.3 E 999 40
11 APR 14 0600 29.6 S 47.7 E 999 40
11 APR 14 1200 30.5 S 47.7 E 998 40
11 APR 14 1800 31.5 S 47.4 E 999 40
11 APR 15 0000 32.2 S 47.0 E 995 40
11 APR 15 0600 32.8 S 47.3 E 987 50
11 APR 15 1200 33.8 S 47.5 E 985 50
11 APR 15 1800 34.8 S 48.4 E 986 50
11 APR 16 0000 35.7 S 49.0 E 992 45 Locally 50 kts NW quad
11 APR 16 0600 37.0 S 49.6 E 995 35 Locally 45 kts E semi.
11 APR 16 1200 39.8 S 50.8 E 1002 NCEP re-analysis
11 APR 16 1800 40.3 S 52.6 E 1005
11 APR 17 0000 43.1 S 56.7 E 1007
11 APR 17 0600 45.1 S 62.6 E 1007
Note: The pre and post-warning portions of the above track were sent to
the author by Steve Young. Following is a short write-up of this system
by Steve:
"On April 9 a diffuse area of low pressure moved from Mozambique into the
Indian Ocean. By the 12th a circulation formed north of the initial
system and was quasi-stationary near 25S/50E. Designated Investigative
Area 94S, the system drifted southeastward. Although the NRL considered
this a weak system (15 kts, 1010 mb), reanalysis data indicated a
stronger system with central pressure of 997 mb or less. Following
extratropical transisition, the system continued to track southeastward,
being absorbed into a frontal system on April 17. At one time, there
were indications that this was a subtropical depression (ST=2.0) with
winds of 25-30 kts."
It should be noted that SAB rendered Hebert/Poteat ratings as high as
ST 3.0 on 15 April.
*************************************************************************
*************************************************************************
NORTHWEST AUSTRALIA/SOUTHEAST INDIAN OCEAN (AUW) - Longitude 90E to 135E
Sources of Information
----------------------
The track coordinates as well as the central pressure and 10-minute
average maximum sustained wind estimates were obtained from warnings
issued by the Tropical Cyclone Warning Centres at Perth, Western
Australia, and Darwin, Northern Territory. The 1-minute average
maximum sustained wind estimates were taken from warnings issued by
the Joint Typhoon Warning Center (JTWC) of the U. S. Air Force and
Navy, located at Pearl Harbor, Hawaii. The center position coordinates
from JTWC were compared with those from the Australian centres and
annotations made in the Remarks column when the differences in general
amounted to 40-50 nm or more.
Following is the link to the Wikipedia page for the 2010-2011
Australian Region Cyclone Season:
http://en.wikipedia.org/wiki/2010%E2%80%9311_Australian_region_cyclone_season>
Systems Tracked
---------------
Tropical Cyclone ERROL (29U / 21S) 14 - 18 Apr
*************************************************************************
Storm Name: ERROL Cyclone Number: 21S Basin: AUW
(Name assigned by Darwin TCWC - Australian LOW 29U)
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 14 0600 12.0 S 126.0 E 1000 30
11 APR 14 1200 12.5 S 126.3 E 1000 25
11 APR 14 1800 12.4 S 126.4 E 1000 30
11 APR 15 0000 12.7 S 126.1 E 996 40 35 Named TC Errol
11 APR 15 0600 12.5 S 125.8 E 996 40
11 APR 15 1200 12.6 S 126.0 E 996 45 40
11 APR 15 1800 12.2 S 125.4 E 997 40
11 APR 16 0000 11.7 S 125.1 E 989 50 50
11 APR 16 0600 11.3 S 124.7 E 986 50 55
11 APR 16 1200 11.0 S 124.7 E 986 55 55 JTWC: 11.5S/124.5E
11 APR 16 1800 11.1 S 124.4 E 991 50 50
11 APR 17 0000 10.9 S 124.1 E 993 45 45 Jakarta warnings
11 APR 17 0600 11.0 S 124.0 E 999 40
11 APR 17 1200 11.0 S 123.2 E 1001 40 35 JTWC: 10.1S/125.1E
11 APR 17 1800 10.6 S 123.6 E 1001 35
11 APR 18 0000 10.2 S 123.5 E 1003 35 30 Ex-TC
11 APR 18 1200 9.9 S 123.1 E 30
*************************************************************************
*************************************************************************
SOUTH PACIFIC (SPA) - South Pacific Ocean East of Longitude 160E
Sources of Information
----------------------
The track coordinates as well as the central pressure and 10-minute
average maximum sustained wind estimates were obtained from warnings
issued by the Tropical Cyclone Warning Centres at Nadi, Fiji, and
Wellington, New Zealand. The 1-minute average maximum sustained wind
estimates were taken from warnings issued by the Joint Typhoon Warning
Center (JTWC) of the U. S. Air Force and Navy, located at Pearl Harbor,
Hawaii. The center position coordinates from JTWC were compared with
those from the Southern Hemisphere centres and annotations made in the
Remarks column when the differences in general amounted to 40-50 nm
or more.
Following is the link to the Wikipedia page for the 2010-2011
South Pacific Cyclone Season:
http://en.wikipedia.org/wiki/2010%E2%80%9311_South_Pacific_cyclone_season>
Systems Tracked
---------------
Tropical Depression (14F) 09 - 11 Apr
Tropical Depression (15F) 15 - 16 Apr
*************************************************************************
Storm Name: None Cyclone Number: None Basin: SPA
Fiji Tropical Disturbance Number: 14F
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 09 2100 19.0 S 171.0 E 1007
11 APR 10 0600 17.3 S 170.0 E 1005
11 APR 10 1800 19.5 S 171.0 E 1005
11 APR 10 2100 20.6 S 172.7 E 1005
11 APR 11 0000 21.2 S 172.8 E 1005
11 APR 11 0600 21.6 S 173.6 E 1005
11 APR 11 1800 23.4 S 175.6 E 1008
11 APR 11 2100 23.9 S 175.6 E 1008
*************************************************************************
Storm Name: None Cyclone Number: None Basin: SPA
Fiji Tropical Disturbance Number: 15F
Date Time Lat Lon Cent MSW MSW Remarks
(GMT) Press 1-min 10-min
(mb) (kts) (kts)
-------------------------------------------------------------------------
11 APR 15 1800 20.7 S 159.6 E 1003
11 APR 15 2100 22.4 S 160.9 E
11 APR 16 0000 23.0 S 160.6 E 1000 30
11 APR 16 0600 23.4 S 161.9 E 1000 35 Gales NE quad
11 APR 16 1200 23.8 S 163.0 E 1000 30
11 APR 16 1800 24.7 S 164.6 E 999 30
11 APR 16 2100 25.0 S 165.9 E 1000 30
*************************************************************************
*************************************************************************
********** SPECIAL NOTE **********
I now have some assistants who are helping to prepare the monthly
tropical cyclone files, and I'd like to thank them for their willing-
ness to assist me. Kevin Boyle, of Stoke-on-Trent, UK, will be
preparing the tracks for Northwest Pacific basin tropical cyclones
during the most active part of the NWP season from June through
December.
Michael Bath, of McLeans Ridges, New South Wales, Australia, is now
preparing the track files for Australian Region and South Pacific
tropical cyclones. Also, Steve Young sends me tracks with data for
the pre-warning and post-warning stages of tropical cyclones in all
basins, prepared primarily from NCEP re-analysis data or else taken
from NRL files.
A very special thanks is due to Kevin, Michael and Steve for their
assistance.
*************************************************************************
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:
http://www.usno.navy.mil/JTWC>
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]
Kevin Boyle [email protected]
Michael Bath [email protected]
SIGNIFICANT CONTRIBUTIONS BY:
Michael V. Padua [email protected]
[email protected]
Steve Young [email protected]
*************************************************************************
*************************************************************************
*************************************************************************
|
Document: trak1104.htm
Updated: 14 June 2011 |
[Australian Severe Weather index] [Copyright Notice] [Email Contacts] [Search This Site] |