Atlantic Basin Tropical Cyclones

Hurricane Sam Public Advisory


000
WTNT33 KNHC 050231
TCPAT3

BULLETIN
Hurricane Sam Advisory Number  50
NWS National Hurricane Center Miami FL       AL182021
300 AM GMT Tue Oct 05 2021

...SAM STILL A HURRICANE BUT EXPECTED TO TRANSITION INTO A POWERFUL
POST-TROPICAL CYCLONE SOON...


SUMMARY OF 300 AM GMT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...47.7N 40.2W
ABOUT 610 MI...980 KM E OF CAPE RACE NEWFOUNDLAND
ABOUT 1330 MI...2140 KM SW OF REYKJAVIK ICELAND
MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H
PRESENT MOVEMENT...NNE OR 30 DEGREES AT 29 MPH...46 KM/H
MINIMUM CENTRAL PRESSURE...965 MB...28.50 INCHES


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


DISCUSSION AND OUTLOOK
----------------------
At 300 AM GMT (0300 UTC), the center of Hurricane Sam was located
near latitude 47.7 North, longitude 40.2 West. Sam is moving toward
the north-northeast near 29 mph (46 km/h).  This general motion
should continue overnight with a decrease in forward speed.  A
slow east-northeastward motion is forecast to begin by late today,
and a northeastward motion is expected Wednesday and Wednesday
night.

Maximum sustained winds have decreased to near 85 mph (140 km/h)
with higher gusts.  Although gradual weakening is forecast during
the next few days, Sam is expected to transition into a powerful
post-tropical cyclone over the north Atlantic within the next 6-12
hours.

Hurricane-force winds extend outward up to 80 miles (130 km) from
the center and tropical-storm-force winds extend outward up to 460
miles (740 km).

The estimated minimum central pressure is 965 mb (28.50 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, portions of the Bahamas, and
southeastern Newfoundland through midweek.  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 900 AM GMT.

$$
Forecaster Blake



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