Operation Storm Watch

Operation Storm Watch

The latest hurricane updates and resources

 

11 AM Advisory: Dorian Now A Strong Cat 4 At 155 MPH

Grand Bahama Island has weakened Dorian which is now a very strong Cat 4 storm with 155 mph winds.

Grand Bahama Island continues to experience catastrophic winds and storm surge as Dorian inches westward...

11:00 AM EDT Mon Sep 2

Location:26.8°N 78.3°W

Moving:W at 1 mph

Min pressure:922 mb

Max sustained:155 mph

Hurricane Dorian Advisory Number 37

NWS National Hurricane Center Miami FL AL052019

1100 AM EDT Mon Sep 02 2019

...GRAND BAHAMA ISLAND CONTINUES TO EXPERIENCE CATASTROPHIC WINDS

AND STORM SURGE AS DORIAN INCHES WESTWARD...

SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION

-----------------------------------------------

LOCATION...26.8N 78.3W

ABOUT 30 MI...50 KM NE OF FREEPORT GRAND BAHAMA ISLAND

ABOUT 110 MI...180 KM E OF WEST PALM BEACH FLORIDA

MAXIMUM SUSTAINED WINDS...155 MPH...250 KM/H

PRESENT MOVEMENT...W OR 280 DEGREES AT 1 MPH...2 KM/H

MINIMUM CENTRAL PRESSURE...922 MB...27.23 INCHES

WATCHES AND WARNINGS

--------------------

CHANGES WITH THIS ADVISORY:

The Storm Surge Warning has been extended northward along the

east coast of Florida to the Flagler/Volusia County Line.

The Storm Surge Watch has been extended northward along the Georgia

coast to the Savannah River.

The Hurricane Warning along the east coast of Florida has been

extended northward to the Flagler/Volusia County Line.

The Hurricane Watch has been extended northward to Altamaha Sound

Georgia.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for...

* Lantana to the Flagler/Volusia County Line

A Storm Surge Watch is in effect for...

* North of Deerfield Beach to south of Lantana

* Flagler/Volusia County Line to the Savannah River

A Hurricane Warning is in effect for...

* Grand Bahama and the Abacos Islands in the northwestern Bahamas

* Jupiter Inlet to the Flagler/Volusia County Line

A Hurricane Watch is in effect for...

* North of Deerfield Beach to Jupiter Inlet

* Flagler/Volusia County Line to the Altamaha Sound Georgia

A Tropical Storm Warning is in effect for...

* North of Deerfield Beach to Jupiter Inlet

A Tropical Storm Watch is in effect for...

* North of Golden Beach to Deerfield Beach

* Lake Okeechobee

A Storm Surge Warning means there is a danger of life-threatening

inundation, from rising water moving inland from the coastline,

during the next 36 hours in the indicated locations. For a

depiction of areas at risk, please see the National Weather

Service Storm Surge Watch/Warning Graphic, available at

hurricanes.gov. This is a life-threatening situation. Persons

located within these areas should take all necessary actions to

protect life and property from rising water and the potential for

other dangerous conditions. Promptly follow evacuation and other

instructions from local officials.

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.

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 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 Tropical Storm Warning means that tropical storm conditions are

expected 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.

Interests elsewhere along southeast coast of the United States

should continue to monitor the progress of Dorian, as additional

watches may be required later today.

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 1100 AM EDT (1500 UTC), the eye of Hurricane Dorian was

located near latitude 26.8 North, longitude 78.3 West. Dorian is

moving very slowly toward the west near 1 mph (2 km/h). A slow

westward to west-northwestward motion is forecast during the next

day or so, followed by a gradual turn toward the northwest and

north. On this track, the core of extremely dangerous Hurricane

Dorian will continue to pound Grand Bahama Island through much of

today and tonight. The hurricane will then move dangerously close

to the Florida east coast late tonight through Wednesday evening and

then move dangerously close to the Georgia and South Carolina coasts

on Wednesday night and Thursday.

Maximum sustained winds are near 155 mph (250 km/h) with higher

gusts. Dorian is an extremely dangerous category 4 hurricane on the

Saffir-Simpson Hurricane Wind Scale. Although gradual weakening is

forecast, Dorian is expected to remain a powerful hurricane during

the next couple of days.

Hurricane-force winds extend outward up to 45 miles (75 km) from the

center and tropical-storm-force winds extend outward up to 140 miles

(220 km).

The estimated minimum central pressure is 922 mb (27.23 inches).

HAZARDS AFFECTING LAND

----------------------

WIND: Catastrophic hurricane conditions continue on Grand Bahama

Island. Do not venture out into the eye, as winds will suddenly

increase after the eye passes.

Hurricane conditions are expected within the Hurricane Warning area

in Florida by late tonight or Tuesday. Hurricane conditions are

possible in the Hurricane Watch area on Wednesday.

Tropical storm conditions are expected within the Tropical Storm

warning area today and Tuesday, and are possible in the Tropical

Storm watch area by tonight.

STORM SURGE: A life-threatening storm surge will raise water levels

by as much as 18 to 23 feet above normal tide levels in areas of

onshore winds on Grand Bahama Island. Near the coast, the surge

will be accompanied by large and destructive waves. Water levels

should very slowly subside on the Abaco Islands during the day.

The combination of a dangerous storm surge and the tide will cause

normally dry areas near the coast to be flooded by rising waters

moving inland from the shoreline. The water could reach the

following heights above ground somewhere in the indicated

areas if the peak surge occurs at the time of high tide...

Lantana to the Savannah River...4 to 7 ft

North of Deerfield Beach to Lantana...2 to 4 ft

Water levels could begin rise well in advance of the arrival of

strong winds. The surge will be accompanied by large and destructive

waves. Surge-related flooding depends on the how close the center of

Dorian comes to the coast, and can vary greatly over short

distances. For information specific to your area, please see

products issued by your local National Weather Service forecast

office.

RAINFALL: Dorian is expected to produce the following rainfall

totals through late this week:

Northwestern Bahamas...12 to 24 inches, isolated 30 inches.

Central Bahamas...Additional 1 to 3 inches, isolated storm totals

of 6 inches.

Coastal Carolinas...5 to 10 inches, isolated 15 inches.

Atlantic Coast from the Florida peninsula through Georgia...4 to 8

inches, isolated 10 inches.

This rainfall may cause life-threatening flash floods.

SURF: Large swells are affecting east-facing shores of the Bahamas

and the Florida east coast, and will spread northward along the

southeastern United States coast during the next few days. These

swells are likely to cause life-threatening surf and rip current

conditions. Please consult products from your local weather office.

TORNADOES: Isolated tornadoes are possible this afternoon into

tonight along the immediate coast of east-central Florida.


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