Atlantic Basin GIS Data

Hurricane Sam Public Advisory


000
WTNT33 KNHC 292050
TCPAT3

BULLETIN
Hurricane Sam Advisory Number  29
NWS National Hurricane Center Miami FL       AL182021
500 PM AST Wed Sep 29 2021

...CATEGORY 4 HURRICANE SAM PASSING WELL TO THE EAST-NORTHEAST OF 
THE NORTHERN LEEWARD ISLANDS...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...20.2N 57.6W
ABOUT 385 MI...620 KM ENE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...130 MPH...215 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...945 MB...27.91 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 500 PM AST (2100 UTC), the center of Hurricane Sam was located
near latitude 20.2 North, longitude 57.6 West. Sam is moving toward
the northwest near 9 mph (15 km/h), and this general motion with an
increase in forward speed is expected during the next couple of
days.  A turn toward the north is forecast by Friday.  On the
forecast track, Sam will continue to pass well to the 
east-northeast of the northern Leeward Islands through tonight.

Maximum sustained winds are near 130 mph (215 km/h) with higher
gusts.  Sam is a category 4 hurricane on the Saffir-Simpson
Hurricane Wind Scale.  Some fluctuations in intensity are expected
during the next couple of days, but Sam is forecast to remain a
major hurricane through late this week.

Hurricane-force winds extend outward up to 40 miles (65 km) from the
center and tropical-storm-force winds extend outward up to 140 miles
(220 km).

An Air Force Reserve Unit Hurricane Hunter aircraft reported a 
minimum central pressure of 945 mb (27.91 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.

SURF:  Swells generated by Sam will impact the Lesser Antilles
during the next several days.  Swells are expected to reach Bermuda
and the Bahamas in a day or so, and then spread to the United
States east coast by this weekend.  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 1100 PM AST.

$$
Forecaster Pasch



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