BULLETIN
Hurricane Sam Advisory Number 10
NWS National Hurricane Center Miami FL AL182021
1100 PM AST Fri Sep 24 2021
...SAM NOW A CATEGORY 2 HURRICANE...
...FORECAST TO BECOME A MAJOR HURRICANE ON SATURDAY...
SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...12.4N 45.9W
ABOUT 1215 MI...1950 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...982 MB...29.00 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 1100 PM AST (0300 UTC), the eye of Hurricane Sam was located
near latitude 12.4 North, longitude 45.9 West. Sam is moving toward
the west-northwest near 14 mph (22 km/h). A motion toward the west
or west-northwest with a decrease in forward speed is expected
over the weekend. A turn toward the northwest is forecast on
Monday.
Maximum sustained winds have increased to near 100 mph (155 km/h)
with higher gusts. Additional strengthening is forecast, and Sam
is expected to become a major hurricane on Saturday.
Sam is a small hurricane. Hurricane-force winds extend outward up
to 15 miles (30 km) from the center and tropical-storm-force winds
extend outward up to 60 miles (95 km).
The estimated minimum central pressure is 982 mb (29.00 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Hurricane Sam Advisory Number 8
NWS National Hurricane Center Miami FL AL182021
1100 AM AST Fri Sep 24 2021
...SAM TAKING A MOMENTARY PAUSE IN STRENGTHENING...
...RAPID INTENSIFICATION FORECAST TO RESUME SOON...
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...11.8N 43.7W
ABOUT 1365 MI...2200 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 1100 AM AST (1500 UTC), the center of Hurricane Sam was located
near latitude 11.8 North, longitude 43.7 West. Sam is moving just
north of due west near 14 mph (22 km/h) and this motion is expected
to continue through tonight. A decrease in forward speed and a
motion toward the west-northwest are expected over the weekend.
Maximum sustained winds remain near 75 mph (120 km/h) with higher
gusts. Rapid intensification is forecast to resume over the next
several days and Sam is likely to become a major hurricane on
Saturday.
Hurricane-force winds extend outward up to 15 miles (30 km) from the
center and tropical-storm-force winds extend outward up to 60 miles
(95 km).
The estimated minimum central pressure is 993 mb (29.33 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Hurricane Sam Advisory Number 7
NWS National Hurricane Center Miami FL AL182021
500 AM AST Fri Sep 24 2021
...SAM IS NOW A HURRICANE...
...RAPID INTENSIFICATION FORECAST TO CONTINUE...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...11.5N 42.2W
ABOUT 1470 MI...2365 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.33 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 11.5 North, longitude 42.2 West. Sam is moving toward
the west near 15 mph (24 km/h) and this motion is expected to
continue through tonight. A decrease in forward speed and a motion
toward the west-northwest are expected over the weekend.
Maximum sustained winds have increased to near 75 mph (120 km/h)
with higher gusts. Rapid intensification is forecast to continue,
and Sam is likely to become a major hurricane tonight or early
Saturday.
Hurricane-force winds extend outward up to 15 miles (30 km) from the
center and tropical-storm-force winds extend outward up to 60 miles
(95 km).
The estimated minimum central pressure is 993 mb (29.33 inches).
HAZARDS AFFECTING LAND
----------------------
None.
ULLETIN
Tropical Storm Sam Advisory Number 5
NWS National Hurricane Center Miami FL AL182021
500 PM AST Thu Sep 23 2021
...SAM CONTINUES TO STRENGTHEN...
...RAPID INTENSIFICATION POSSIBLE OVER THE NEXT SEVERAL DAYS...
SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...11.1N 39.7W
ABOUT 1635 MI...2635 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...1000 MB...29.53 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 Tropical Storm Sam was
located near latitude 11.1 North, longitude 39.7 West. Sam is moving
toward the west near 16 mph (26 km/h) and a general west to
west-northwest motion is expected to continue over the next several
days, with a gradual slowdown in forward motion.
Maximum sustained winds have increased to near 60 mph (95 km/h) with
higher gusts. Rapid intensification is forecast during the next
several days. Sam is forecast to become a hurricane tomorrow morning
and could become a major hurricane by Saturday.
Tropical-storm-force winds extend outward up to 60 miles (95 km)
from the center.
The estimated minimum central pressure is 1000 mb (29.53 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Tropical Storm Sam Advisory Number 4
NWS National Hurricane Center Miami FL AL182021
1100 AM AST Thu Sep 23 2021
...DEPRESSION STRENGTHENS INTO TROPICAL STORM SAM, THE 18TH NAMED
STORM OF THE SEASON...
...NOW FORECAST TO BECOME A HURRICANE TOMORROW...
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...10.9N 38.1W
ABOUT 1745 MI...2805 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...W OR 280 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 1100 AM AST (1500 UTC), the center of Tropical Storm Sam was
located near latitude 10.9 North, longitude 38.1 West. Sam is moving
toward the west near 16 mph (26 km/h) and this general motion is
expected to continue over the next several days, but with a gradual
slowdown in forward motion.
Recent sallite wind data indicates maximum sustained winds have
increased to near 50 mph (85 km/h) with higher gusts. Additional
strengthening is forecast over the next several days, and Sam is now
forecast to become a hurricane tomorrow and be near major hurricane
intensity by the end of the weekend.
Tropical-storm-force winds extend outward up to 45 miles (75 km)
from the center.
The estimated minimum central pressure is 1003 mb (29.62 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Tropical Depression Eighteen Advisory Number 2
NWS National Hurricane Center Miami FL AL182021
1100 PM AST Wed Sep 22 2021
...TROPICAL DEPRESSION EXPECTED TO TAKE ITS TIME CROSSING THE
TROPICAL ATLANTIC...
...LOTS OF TIME TO MONITOR...
SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...10.2N 35.0W
ABOUT 1955 MI...3150 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
DISCUSSION AND OUTLOOK
----------------------
At 1100 PM AST (0300 UTC), the center of Tropical Depression
Eighteen was located near latitude 10.2 North, longitude 35.0 West.
The depression is moving toward the west near 15 mph (24 km/h), and
this general motion is expected to continue through early Friday.
A slower motion toward the west-northwest is expected later on
Friday and continuing into the weekend.
Maximum sustained winds are near 35 mph (55 km/h) with higher gusts.
Strengthening is forecast during the next few days, and the
depression could become a tropical storm on Thursday. It is then
forecast to become a hurricane over the weekend.
The estimated minimum central pressure is 1008 mb (29.77 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Tropical Storm Rose Advisory Number 11
NWS National Hurricane Center Miami FL AL172021
500 PM AST Tue Sep 21 2021
...ROSE HOLDING ON AS A TROPICAL STORM....
SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...22.5N 37.7W
ABOUT 1000 MI...1605 KM WNW OF THE CABO VERDE ISLANDS
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...NW OR 320 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...1008 MB...29.77 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 Tropical Storm Rose was
located near latitude 22.5 North, longitude 37.7 West. Rose is
moving toward the northwest near 10 mph (17 km/h). The storm
should gradually turn toward the north during the next couple of
days and move more to the northeast on Friday.
Maximum sustained winds remain near 40 mph (65 km/h) with higher
gusts. Rose could decay into a tropical depression this evening and
degenerate into a remnant low by Friday.
Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center.
The estimated minimum central pressure is 1008 mb (29.77 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Tropical Storm Rose Advisory Number 9
NWS National Hurricane Center Miami FL AL172021
500 AM AST Tue Sep 21 2021
...ROSE BEGINS TO WEAKEN...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...21.0N 36.4W
ABOUT 880 MI...1420 KM WNW OF THE CABO VERDE ISLANDS
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...NW OR 325 DEGREES AT 20 MPH...31 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 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 Tropical Storm Rose was
located near latitude 21.0 North, longitude 36.4 West. Rose is
moving toward the northwest near 20 mph (31 km/h). A slower
northwestward motion is expected during the next couple of days
followed by a turn to the north.
Maximum sustained winds have decreased to near 45 mph (75 km/h)
with higher gusts. Continued slow weakening is expected during the
next few days.
Tropical-storm-force winds extend outward up to 90 miles (150 km)
from the center.
The estimated minimum central pressure is 1006 mb (29.71 inches).
HAZARDS AFFECTING LAND
----------------------
None.
BULLETIN
Tropical Storm Peter Advisory Number 11
NWS National Hurricane Center Miami FL AL162021
500 AM AST Tue Sep 21 2021
...DISORGANIZED PETER PASSING TO THE NORTH OF THE VIRGIN ISLANDS...
SUMMARY OF 500 AM AST...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...19.6N 63.8W
ABOUT 105 MI...170 KM NNW OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...W OR 265 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
Interests in the northern Leeward Islands, Virgin Islands, and
Puerto Rico should monitor the progress of this system.
DISCUSSION AND OUTLOOK
----------------------
At 500 AM AST (0900 UTC), the center of Tropical Storm Peter was
located near latitude 19.6 North, longitude 63.8 West. Peter is
moving toward the west near 12 mph (19 km/h). A west-northwest
motion is expected to resume later today and continue for the next
day or two. A turn to the north with a decrease in forward speed
is expected later this week. On the forecast track, the center of
Peter will pass north of the Virgin Islands and Puerto Rico today.
Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Slow weakening is forecast during the next few days.
Tropical-storm-force winds extend outward up to 175 miles (280 km)
from the center.
The estimated minimum central pressure is 1007 mb (29.74 inches).
HAZARDS AFFECTING LAND
----------------------
RAINFALL: Rainfall around the southern periphery of Tropical Storm
Peter could produce additional rainfall totals of 1 to 4 inches,
with storm total accumulations up to 6 inches, across portions of
the Northern Leeward Islands, including portions of the Virgin
Islands, as well as Puerto Rico and the northern portions of
Hispaniola through Thursday morning. This rainfall may lead to areas
of urban and small stream flooding.
SURF: Swells generated by Peter are affecting the northern Leeward
Islands and Puerto Rico, and will continue spreading westward to
Hispaniola later today and the Bahamas on Wednesday. These swells
could cause life-threatening surf and rip current conditions. Please
consult products from your local weather office.
