Atlantic Basin Tropical Cyclones

Hurricane Sam Public Advisory


906 
WTNT33 KNHC 031446
TCPAT3

BULLETIN
Hurricane Sam Advisory Number  44
NWS National Hurricane Center Miami FL       AL182021
1100 AM AST Sun Oct 03 2021

...SAM MOVING NORTHEASTWARD OVER THE OPEN NORTH ATLANTIC...
...EXPECTED TO BECOME A LARGE AND POWERFUL POST-TROPICAL LOW
PRESSURE SYSTEM ON MONDAY...


SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...37.7N 54.6W
ABOUT 625 MI...1010 KM S OF CAPE RACE NEWFOUNDLAND
MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H
PRESENT MOVEMENT...NE OR 50 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...964 MB...28.47 INCHES


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


DISCUSSION AND OUTLOOK
----------------------
At 1100 AM AST (1500 UTC), the eye of Hurricane Sam was located near 
latitude 37.7 North, longitude 54.6 West. Sam is moving toward
the northeast near 16 mph (26 km/h).  A northeastward motion at 
a faster forward speed is expected over the next couple of days.  
The cyclone is forecast to slow down over the north Atlantic around 
midweek. 

Maximum sustained winds are near 100 mph (155 km/h) with higher 
gusts.  Gradual weakening is forecast during the next few days, and 
Sam is expected to transition into a powerful post-tropical cyclone 
on Monday.

Hurricane-force winds extend outward up to 45 miles (75 km) from the
center and tropical-storm-force winds extend outward up to 240 miles
(390 km).

The estimated minimum central pressure is 964 mb (28.47 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.

SURF:  Swells generated by Sam will impact the northern Leeward
Islands, the Greater Antilles, the Bahamas, the eastern United
States and Atlantic Canada for the next couple of days.  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 Brown




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