Hurricane Isaias Intermediate Advisory Number 13A
NWS National Hurricane Center Miami FL AL092020
800 AM EDT Fri Jul 31 2020
...STRONG WINDS AND HEAVY SQUALLS LASHING THE SOUTHEASTERN BAHAMAS
AND THE TURKS AND CAICOS ISLANDS...
...HURRICANE CONDITIONS EXPECTED TODAY OVER PORTIONS OF THE
SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION
ABOUT 30 MI...50 KM NW OF GREAT INAGUA ISLAND
ABOUT 340 MI...545 KM SE OF NASSAU
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...NW OR 305 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...990 MB...29.24 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
The Tropical Storm Warning for Haiti has been discontinued.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for...
* Northwestern Bahamas including Andros Island, New Providence,
Eleuthera, Abacos Islands, Berry Islands, Grand Bahamas Island, and
* Southeastern Bahamas including the Acklins, Crooked Island, Long
Cay, the Inaguas, Mayaguana, and the Ragged Islands
* Central Bahamas, including Cat Island, the Exumas, Long Island,
Rum Cay, and San Salvador
A Tropical Storm Warning is in effect for...
* Dominican Republic entire southern and northern coastlines
* Turks and Caicos Islands
A Tropical Storm Watch is in effect for...
* East coast of Florida from Ocean Reef to Sebastian Inlet
* Lake Okeechobee
Interests elsewhere along the southeast coast of the United
States should monitor the progress of this system. Additional
watches or warnings may be required for a portion of the Florida
peninsula later today. The Tropical Storm Warning for the
Dominican Republic will likely be discontinued later this morning.
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area. Preparations to protect life
and property should be rushed to completion.
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 800 AM EDT (1200 UTC), the center of Hurricane Isaias was located
by NOAA and Air Force Reserve Hurricane Hunter aircraft near
latitude 21.3 North, longitude 73.9 West. Isaias is moving toward
the northwest near 17 mph (28 km/h), and a generally northwestward
motion with some decrease in forward speed is expected for the next
couple of days followed by a turn toward the north-northwest. On
the forecast track, the center of Isaias will move near or over the
Southeastern Bahamas today. Isaias is forecast to be near the
Central Bahamas tonight, and move near or over the Northwestern
Bahamas and be near or east of the Florida peninsula on Saturday and
Maximum sustained winds are near 80 mph (130 km/h) with higher
gusts. Some strengthening is possible today, and Isaias is expected
to remain a hurricane for the next few days.
Hurricane-force winds extend outward up to 45 miles (75 km) from
the center and tropical-storm-force winds extend outward up to 205
miles (335 km). A private weather observing site at Long Bay Beach
in Providenciales recently reported a sustained wind of 55 mph (86
km/h) and a gust to 59 mph (95 km/h).
Reports from the reconnaissance aircraft indicate that the minimum
central pressure is 990 mb (29.24 inches).