Atlantic Basin Tropical Cyclones

Hurricane Sam Public Advisory


000
WTNT33 KNHC 030844
TCPAT3

BULLETIN
Hurricane Sam Advisory Number  43
NWS National Hurricane Center Miami FL       AL182021
500 AM AST Sun Oct 03 2021

...SAM CONTINUES TO WEAKEN AS IT MOVES NORTHEASTWARD OVER THE
OPEN NORTH ATLANTIC...
...EXPECTED TO BECOME A LARGE AND POWERFUL POST-TROPICAL LOW
PRESSURE SYSTEM ON MONDAY...


SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...37.3N 55.9W
ABOUT 665 MI...1070 KM SSW OF CAPE RACE NEWFOUNDLAND
MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H
PRESENT MOVEMENT...NE OR 45 DEGREES AT 17 MPH...28 KM/H
MINIMUM CENTRAL PRESSURE...960 MB...28.35 INCHES


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


DISCUSSION AND OUTLOOK
----------------------
At 500 AM AST (0900 UTC), the center of Hurricane Sam was located
near latitude 37.3 North, longitude 55.9 West.  Sam is moving toward
the northeast near 17 mph (28 km/h).  This general motion with an
increase in forward speed is expected during the next few days.  On
the forecast track, Sam will move over the far North Atlantic well 
to southeast and east of Newfoundland.

Maximum sustained winds decreased to near 105 mph (165 km/h) with 
higher gusts.  Further weakening is forecast during the next few 
days, and Sam is expected 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 960 mb (28.35 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 1100 AM AST.

$$
Forecaster Stewart



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