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Potential Tropical Cyclone NINE (Text)


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BULLETIN
Potential Tropical Cyclone Nine Intermediate Advisory Number 5A
NWS National Hurricane Center Miami FL       AL092020
200 PM AST Wed Jul 29 2020
 
...DISTURBANCE BRINGING HEAVY RAINFALL AND GUSTY WINDS TO THE 
LEEWARD ISLANDS...THE U.S. AND BRITISH VIRGIN ISLANDS...AND PUERTO 
RICO...
 
 
SUMMARY OF 200 PM AST...1800 UTC...INFORMATION
----------------------------------------------
LOCATION...16.2N 64.7W
ABOUT 105 MI...165 KM S OF ST. CROIX
ABOUT 180 MI...285 KM SSE OF SAN JUAN PUERTO RICO
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 23 MPH...37 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
 
The government of the Dominican Republic has issued a Tropical 
Storm Warning along the south coast of the Dominican Republic west 
of Cabo Caucedo to the border with Haiti.

The government of Antigua has discontinued the Tropical Storm 
Warning for Antigua and Barbuda. 

The government of France has discontinued the Tropical Storm 
Warning for Martinique and Guadeloupe. 
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
 
A Tropical Storm Warning is in effect for...
* Puerto Rico, Vieques, Culebra
* U.S. Virgin Islands
* British Virgin Islands
* Montserrat, St. Kitts, Nevis, and Anguilla
* St. Martin, and St. Barthelemy
* Saba and St. Eustatius
* St. Maarten
* Dominican Republic entire southern and northern coastlines 
* North coast of Haiti from Le Mole St Nicholas eastward to the
northern border with the Dominican Republic
* Turks and Caicos Islands
* Southeastern Bahamas including the Acklins, Crooked Island, Long
Cay, the Inaguas, Mayaguana, and the Ragged Islands
 
A Tropical Storm Watch is in effect for...
* Central Bahamas, including Cat Island, the Exumas, Long Island,
Rum Cay, and San Salvador
 
Interests in the northwestern Bahamas and Cuba should monitor the
progress of this system.
 
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.
 
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.
 
For storm information specific to your area in the United
States, including possible inland watches and warnings, please
monitor products issued by your local National Weather Service
forecast office. For storm information specific to your area
outside of the United States, please monitor products issued by
your national meteorological service.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 200 PM AST (1800 UTC), the disturbance was centered near latitude
16.2 North, longitude 64.7 West. The system is moving toward the
west-northwest near 23 mph (37 km/h), and this general motion with a
reduction in forward speed is expected over the next few days.  On
the forecast track, the system will move near or just south of
Puerto Rico later today and tonight, near or over Hispaniola on
Thursday, and near or over eastern Cuba on Friday.
 
Maximum sustained winds are near 45 mph (75 km/h) with higher
gusts. Some increase in strength is forecast through tonight, with
weakening likely on Thursday due to land interaction.  Some
restrengthening is possible by this weekend.  A wind gust of 44 
mph (71 km/h) was recently reported at the Luis Munoz Marin 
International Airport in San Juan. A wind gust of 44 mph mph (71 
km/h) was also reported at St. Thomas in the U.S. Virgin Islands 
within the past few hours. In St. Maarten, a wind gust to 51 mph 
(81 km/h) was observed late this morning. 
 
Environmental conditions are expected to be conducive for
additional development, and a tropical storm is forecast to form
later today or tonight.
* Formation chance through 48 hours...high ...90 percent
* Formation chance through 5 days...high...90 percent  

Tropical-storm-force winds extend outward up to 275 miles (445 km)
primarily to the north and northeast of the center.
 
The estimated minimum central pressure is 1006 mb (29.71 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Potential Tropical Cyclone Nine can be found in
the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO
header WTNT44 KNHC, and on the web at
www.hurricanes.gov/text/MIATCDAT4.shtml.
 
WIND:  Tropical storm conditions are moving across portions of the
Leeward Islands and will spread across the U.S. and British Virgin
Islands and Puerto Rico this afternoon through Thursday morning.
These conditions are forecast to reach portions of the Dominican
Republic and Haiti within the warning area early Thursday, and the
southeastern Bahamas and Turks and Caicos Thursday afternoon.
Tropical storm conditions are possible in the watch areas on
Thursday and Friday.
 
RAINFALL:  The disturbance is expected to produce the following rain
accumulations:
 
Across the northern Leeward Islands, British and U.S. Virgin
Islands: 3 to 6 inches.
 
Across Puerto Rico: 3 to 6 inches, with isolated maximum totals of
10 inches.
 
Across the Dominican Republic, northern Haiti, and Turks and Caicos:
3 to 6 inches, with isolated maximum totals of 8 inches.
 
Across the Inagua Islands: 4 to 8 inches, with isolated totals of 12
inches.
 
These rainfall amounts may lead to life-threatening flash flooding
and mudslides, as well as potential riverine flooding beginning
today.  Urban and small stream flooding is expected for the U.S.
Virgin Islands and eastern Puerto Rico.
 
SURF:  Swells generated by Potential Tropical Cyclone Nine will be
affecting portions of the Leeward Islands, the Virgin Islands and
Puerto Rico during the next day or two. These swells are forecast to
reach the north coast of the Dominican Republic, the Turks and
Caicos Islands and the southeastern Bahamas tonight or Thursday.
These swells are likely to cause life-threatening surf and rip
current conditions.  Please consult products from your local
weather office.
 
 
NEXT ADVISORY
-------------
Next complete advisory at 500 PM AST.
 
$$
Forecaster Brown
 
NNNN

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Page last modified: Wednesday, 21-Oct-2020 12:09:36 UTC