Atlantic Basin Tropical Cyclones

Hurricane Sam Public Advisory


468 
WTNT33 KNHC 011743
TCPAT3

BULLETIN
Hurricane Sam Intermediate Advisory Number 36A
NWS National Hurricane Center Miami FL       AL182021
200 PM AST Fri Oct 01 2021

...AIR FORCE HURRICANE HUNTERS INDICATE THAT SAM IS MAINTAINING 
CATEGORY 4 STRENGTH...
...CORE OF THE HURRICANE EXPECTED TO PASS WELL EAST OF BERMUDA
TONIGHT...


SUMMARY OF 200 PM AST...1800 UTC...INFORMATION
----------------------------------------------
LOCATION...29.1N 61.9W
ABOUT 280 MI...450 KM SE OF BERMUDA
MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H
PRESENT MOVEMENT...N OR 355 DEGREES AT 21 MPH...33 KM/H
MINIMUM CENTRAL PRESSURE...937 MB...27.67 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for...
* Bermuda

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.

For storm information specific to your area, please monitor
products issued by your national meteorological service.


DISCUSSION AND OUTLOOK
----------------------
At 200 PM AST (1800 UTC), the eye of Hurricane Sam was located
near latitude 29.1 North, longitude 61.9 West. Sam is moving toward
the north near 21 mph (33 km/h).  A turn toward the north-northeast,
at a slightly slower forward speed, is expected by tonight, followed
by a northeastward motion Saturday night through Monday.  On the
forecast track, the center of Sam will pass well to the east of
Bermuda tonight.

Data from the Air Force Hurricane Hunters indicate that maximum 
sustained winds remain near 150 mph (240 km/h) with higher gusts.  
Sam is a category 4 hurricane on the Saffir-Simpson Hurricane Wind 
Scale.  Although fluctuations in intensity are still possible today, 
weakening is forecast during the next couple of days.  However, Sam 
is expected to remain a major hurricane through at least Saturday 
night.

Hurricane-force winds extend outward up to 60 miles (95 km) from
the center and tropical-storm-force winds extend outward up to 205
miles (335 km).

The minimum central pressure based on data from the Air Force 
Hurricane Hunters is 937 mb (27.67 inches).


HAZARDS AFFECTING LAND
----------------------
Key messages for Sam can be found in the Tropical Cyclone Discussion
under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the
web at hurricanes.gov/graphics_at3.shtml?key_messages.

WIND:  Tropical storm conditions are possible on Bermuda beginning
tonight or early Saturday.

SURF:  Swells generated by Sam will impact the northern Leeward
Islands and the Greater Antilles, including Puerto Rico, during the
next couple of days.  Swells are expected to reach Bermuda and the
Bahamas this afternoon, and then spread to the United States east
coast and Atlantic Canada on Saturday.  These swells could 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 Cangialosi/Nepaul




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