Update from the National Hurricane Center:
A Hurricane Warning is in effect for the east coast of Florida from Boca Raton to the Volusia/Brevard County Line.
A Hurricane Watch is in effect from the Volusia/Brevard County Line to the Flagler/Volusia County Line and from south of Boca Raton to Hallendale Beach.
A Storm Surge Watch is in effect for the east coast of Florida from Jupiter Inlet to Ponte Vedre Beach.
A Tropical Storm Watch is in effect from the Flagler/Volusia County Line to Ponte Vedre Beach.
A Tropical Storm Warning is in effect for Lake Okeechobee.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Hurricane Warning is in effect for…
* Boca Raton to the Volusia/Brevard County Line Florida
* Northwestern Bahamas
* Southeastern Bahamas
* Central Bahamas
A Hurricane Watch is in effect for…
* Hallendale Beach to south of Boca Raton Florida
* Volusia-Brevard County Line to the Flagler/Volusia County Line
A Storm Surge Watch is in effect for…
* Jupiter Inlet to Ponte Vedre Beach Florida
A Tropical Storm Warning is in effect for…
* Turks and Caicos Islands
* North of Ocean Reef to south of Boca Raton Florida
* Lake Okeechobee
A Tropical Storm Watch is in effect for…
* Flagler/Volusia County Line to Ponte Vedre Beach Florida
Interests elsewhere along the southeast coast of the United States should monitor the progress of Isaias. Additional watches or warnings may be required later tonight and Saturday.
A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion.
A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous.
A Storm Surge Watch means there is a possibility of life-threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov.
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
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At 500 PM EDT (2100 UTC), the center of Hurricane Isaias was located by satellite imagery and Bahamas radar data near latitude 22.6 North, longitude 75.7 West. Isaias is moving toward the northwest near 15 mph (24 km/h), and a general northwestward motion with some decrease in forward speed is expected for the next day or so, followed by a turn toward the north-northwest by late Sunday. On the forecast track, the center of Isaias will continue to move near or over the Southeastern Bahamas this afternoon and evening. Isaias is forecast to be near the Central Bahamas tonight, and move near or over the Northwestern Bahamas Saturday and near the east coast of the Florida peninsula Saturday afternoon through Sunday.
Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Strengthening is expected later tonight and early Saturday, and Isaias is forecast to remain a hurricane for the next couple of days.
Hurricane-force winds extend outward up to 35 miles (55 km) from the center and tropical-storm-force winds extend outward up to 175 miles (280 km). A private weather observing station at Pitts Town Point, Bahamas, recently reported a sustained wind of 37 mph (59 km/h).
The estimated minimum central pressure is 991 mb (29.27 inches).
Key Messages:
1. Hurricane conditions and dangerous storm surge are expected in portions of the Bahamas through Saturday, and Hurricane Warnings are in effect.
2. Hurricane conditions are expected along portions of the Florida east coast late Saturday and Saturday night, and a Hurricane Warning has been issued. Preparations to protect life and property should be rushed to completion.
3. Dangerous storm surge is possible along the Florida east coast from Jupiter Inlet to Ponte Vedra Beach where water rises of 2 to 4 feet above ground level are possible along the immediate coastline and adjacent waterways. Residents in these areas should follow advice given by local emergency officials.
4. Isaias will produce heavy rains and potentially life-threatening flash and urban flooding, especially in low-lying and poorly drained areas across south to east-central Florida, and across the Carolinas to the mid Atlantic. Isolated minor river flooding is possible across the eastern Carolinas and into Virginia early next week.
5. There is a risk of impacts from winds, heavy rainfall, and storm surge spreading along much of the the U.S. east coast through early next week, and interests there should monitor the progress of Isaias and updates to the forecast.
