Atlantic Basin Tropical Cyclones

Hurricane Sam Public Advisory


000
WTNT33 KNHC 252038
TCPAT3

BULLETIN
Hurricane Sam Advisory Number  13
NWS National Hurricane Center Miami FL       AL182021
500 PM AST Sat Sep 25 2021

...SAM RAPIDLY INTENSIFIES TO A CATEGORY FOUR HURRICANE...
...SOME ADDITIONAL STRENGTHENING EXPECTED THROUGH TONIGHT...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...13.3N 48.5W
ABOUT 1025 MI...1655 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...140 MPH...220 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...943 MB...27.85 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 13.3 North, longitude 48.5 West. Sam is moving toward
the west-northwest near 10 mph (17 km/h). A slower motion to the
west-northwest is expected over the weekend, followed by a turn to
the northwest on Monday.

Maximum sustained winds have increased to near near 140 mph
(220 km/h) with higher gusts.  Sam is now a category 4 hurricane on
the Saffir-Simpson Hurricane Wind Scale.  Additional strengthening
is expected through tonight. Some fluctuations in the hurricane's
intensity are then possible early next week.

Sam remains a small hurricane.  Hurricane-force winds extend
outward up to 30 miles (45 km) from the center and
tropical-storm-force winds extend outward up to 105 miles (165 km).

The estimated minimum central pressure is 943 mb (27.85 inches).


HAZARDS AFFECTING LAND
----------------------
SURF:  Swells generated by Sam are forecast to reach the Lesser
Antilles early next week. 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 Beven



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