Hurricane

Atlantic Tropical Weather Outlook

September 27, 2021

000

ABNT20 KNHC 272342

TWOAT

Tropical Weather Outlook

NWS National Hurricane Center Miami FL

800 PM EDT Mon Sep 27 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane

Sam, located several hundred miles east of the northern Leeward

Islands.

A well-defined low pressure system associated with the remnants of

Peter is located a few hundred miles east of Bermuda. Although

shower and thunderstorm activity is currently disorganized,

environmental conditions are expected to remain marginally

conducive for a short-lived tropical depression to form tonight or

Tuesday while the system moves northeastward at about 10 mph. By

Wednesday, however, conditions are expected to become unfavorable

for further de...

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Hurricane Sam Graphics

September 27, 2021

5-Day Uncertainty Track last updated Mon, 27 Sep 2021 20:51:44 GMT



Wind Speed Probabilities last updated Mon, 27 Sep 2021 20:51:44 GMT

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Hurricane Sam Forecast Discussion Number 21

September 27, 2021

Issued at 500 PM AST Mon Sep 27 2021

000
WTNT43 KNHC 272051
TCDAT3

Hurricane Sam Discussion Number 21
NWS National Hurricane Center Miami FL

AL182021
500 PM AST Mon Sep 27 2021

Sam's weakening trend ended earlier today, with the intensity likely
bottoming out between the issuance of the previous advisory and now.
Over the past few hours, microwave data and satellite imagery
indicate that the inner core and eyewall of the hurricane are making
a comeback. There is now a clear eye in visible imagery, convective
cloud tops colder than -65 degrees C wrap completely around the
center, and the convective mass is becoming more circular once
again. An Air Force Reserve Hurricane Hunter aircraft currently
investigating Sam indicates the central pressure has dropped to 957
mb, with peak...

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Hurricane Sam Public Advisory Number 21

September 27, 2021

Issued at 500 PM AST Mon Sep 27 2021

026
WTNT33 KNHC 272049
TCPAT3

BULLETIN
Hurricane Sam Advisory Number 21
NWS National Hurricane Center Miami FL

AL182021
500 PM AST Mon Sep 27 2021

...SAM BEGINNING TO REGROUP AFTER WEAKENING...
...SOME REINTENSIFICATION EXPECTED THROUGH TONIGHT...

SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...16.3N 52.7W
ABOUT 700 MI...1125 KM E OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H
PRESENT MOVEMENT...NW OR 315 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...957 MB...28.26 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 Hu...

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Summary for Hurricane Sam (AT3/AL182021)

September 27, 2021

...SAM BEGINNING TO REGROUP AFTER WEAKENING... ...SOME REINTENSIFICATION EXPECTED THROUGH TONIGHT...
As of 5:00 PM AST Mon Sep 27
the center of Sam was located near 16.3, -52.7
with movement NW at 9 mph.
The minimum central pressure was 957 mb
with maximum sustained winds of about 120 mph.

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Hurricane Sam Forecast Advisory Number 21

September 27, 2021

Issued at 2100 UTC MON SEP 27 2021

000
WTNT23 KNHC 272048
TCMAT3

HURRICANE SAM FORECAST/ADVISORY NUMBER 21
NWS NATIONAL HURRICANE CENTER MIAMI FL

AL182021
2100 UTC MON SEP 27 2021

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

HURRICANE CENTER LOCATED NEAR 16.3N 52.7W AT 27/2100Z
POSITION ACCURATE WITHIN 15 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT

8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 957 MB
EYE DIAMETER 15 NM
MAX SUSTAINED WINDS 105 KT WITH GUSTS TO 130 KT.
64 KT....... 25NE 20SE 20SW 20NW.
50 KT....... 40NE 30SE 30SW 35NW.
34 KT....... 90NE 90SE 60SW 70NW.
12 FT SEAS..120NE 90SE 90SW 120NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCAT...

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Hurricane Sam Forecast Advisory Number 21

September 27, 2021

Issued at 2100 UTC MON SEP 27 2021

ZCZC MIATCMAT3 ALL
TTAA00 KNHC DDHHMM

HURRICANE SAM FORECAST/ADVISORY NUMBER 21
NWS NATIONAL HURRICANE CENTER MIAMI FL

AL182021
2100 UTC MON SEP 27 2021

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

HURRICANE CENTER LOCATED NEAR 16.3N 52.7W AT 27/2100Z
POSITION ACCURATE WITHIN 15 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT

8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 957 MB
EYE DIAMETER 15 NM
MAX SUSTAINED WINDS 105 KT WITH GUSTS TO 130 KT.
64 KT....... 25NE 20SE 20SW 20NW.
50 KT....... 40NE 30SE 30SW 35NW.
34 KT....... 90NE 90SE 60SW 70NW.
12 FT SEAS..120NE 90SE 90SW 120NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENT...

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Atlantic Tropical Weather Outlook

September 27, 2021

751

ABNT20 KNHC 271906 CCB

TWOAT

Tropical Weather Outlook...Corrected

NWS National Hurricane Center Miami FL

200 PM EDT Mon Sep 27 2021

Corrected geographic reference for the remnants of Peter

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane

Sam, located several hundred miles east of the Lesser Antilles.

The area of low pressure associated with the remnants of Peter is

located a few hundred miles east of Bermuda. The low has become

better defined today, and the shower and thunderstorm activity has

become a little better organized. Any further increase in

organization could result in the formation of a short-lived tropical

depression, while it moves northeastward at about 10 mph. By

Wednesday, ...

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Atlantic Tropical Weather Outlook

September 27, 2021

000

ABNT20 KNHC 271857 CCA

TWOAT

Tropical Weather Outlook...Corrected

NWS National Hurricane Center Miami FL

200 PM EDT Mon Sep 27 2021

Corrected geographic reference for the remnants of Peter

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane

Sam, located several hundred miles east of the Lesser Antilles.

The area of low pressure associated with the remnants of Peter is

located a few miles east of Bermuda. The low has become better

defined today, and the shower and thunderstorm activity has become a

little better organized. Any further increase in organization could

result in the formation of a short-lived tropical depression, while

it moves northeastward at about 10 mph. By Wednesday, environme...

read more »

Atlantic Tropical Weather Outlook

September 27, 2021

000

ABNT20 KNHC 271751

TWOAT

Tropical Weather Outlook

NWS National Hurricane Center Miami FL

200 PM EDT Mon Sep 27 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane

Sam, located several hundred miles east of the Lesser Antilles.

The area of low pressure associated with the remnants of Peter has

become better defined today, and the shower and thunderstorm

activity has become a little better organized. Any further

increase in organization could result in the formation of a

short-lived tropical depression, while it moves northeastward at

about 10 mph. By Wednesday, environmental conditions are expected

to become unfavorable for further development.

* Formation chance through 48 hours...medium....

read more »

Atlantic Tropical Weather Outlook

September 27, 2021

000

ABNT20 KNHC 271751

TWOAT

Tropical Weather Outlook

NWS National Hurricane Center Miami FL

200 PM EDT Mon Sep 27 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane

Sam, located several hundred miles east of the Lesser Antilles.

The area of low pressure associated with the remnants of Peter has

become better defined today, and the shower and thunderstorm

activity has become a little better organized. Any further

increase in organization could result in the formation of a

short-lived tropical depression, while it moves northeastward at

about 10 mph. By Wednesday, environmental conditions are expected

to become unfavorable for further development.

* Formation chance through 48 hours...medium....

read more »

Hurricane Sam Graphics

September 27, 2021

5-Day Uncertainty Track last updated Mon, 27 Sep 2021 15:00:56 GMT



Wind Speed Probabilities last updated Mon, 27 Sep 2021 15:00:56 GMT

read more »

Hurricane Sam Forecast Discussion Number 20

September 27, 2021

Issued at 1100 AM AST Mon Sep 27 2021

759
WTNT43 KNHC 271459
TCDAT3

Hurricane Sam Discussion Number 20
NWS National Hurricane Center Miami FL

AL182021
1100 AM AST Mon Sep 27 2021

Sam appeared weaker on satellite images earlier this morning, and
the eye was not apparent in visible or infrared satellite imagery.
However, a 27/0741 UTC SSMIS pass still showed a well-defined eye.
Recent visible and infrared images from the past couple of
hours however, show that the structure is becoming better organized
again, with the eye again becoming apparent on visible satellite.

A NOAA Hurricane Hunter aircraft has made one pass through the
hurricane so far and found that the central pressure has risen to
about 966 mb. The current intensity estimate is reduced slightly
to 110 kt. The aircraft...

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Hurricane Sam Public Advisory Number 20

September 27, 2021

Issued at 1100 AM AST Mon Sep 27 2021

769
WTNT33 KNHC 271453
TCPAT3

BULLETIN
Hurricane Sam Advisory Number 20
NWS National Hurricane Center Miami FL

AL182021
1100 AM AST Mon Sep 27 2021

...HURRICANE HUNTER AIRCRAFT CURRENTLY INVESTIGATING SAM...

SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...15.7N 52.1W
ABOUT 745 MI...1200 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...125 MPH...205 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...966 MB...28.53 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 latit...

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Summary for Hurricane Sam (AT3/AL182021)

September 27, 2021

...HURRICANE HUNTER AIRCRAFT CURRENTLY INVESTIGATING SAM...
As of 11:00 AM AST Mon Sep 27
the center of Sam was located near 15.7, -52.1
with movement NW at 8 mph.
The minimum central pressure was 966 mb
with maximum sustained winds of about 125 mph.

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Hurricane Sam Public Advisory Number 20

September 27, 2021

Issued at 1100 AM AST Mon Sep 27 2021

ZCZC MIATCPAT3 ALL
TTAA00 KNHC DDHHMM

BULLETIN
Hurricane Sam Advisory Number 20
NWS National Hurricane Center Miami FL

AL182021
1100 AM AST Mon Sep 27 2021

...HURRICANE HUNTER AIRCRAFT CURRENTLY INVESTIGATING SAM...

SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...15.7N 52.1W
ABOUT 745 MI...1200 KM ESE OF THE NORTHERN LEEWARD ISLANDS
MAXIMUM SUSTAINED WINDS...125 MPH...205 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...966 MB...28.53 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
nea...

read more »

Summary for Hurricane Sam (AT3/AL182021)

September 27, 2021

...HURRICANE HUNTER AIRCRAFT CURRENTLY INVESTIGATING SAM...
As of 11:00 AM AST Mon Sep 27
the center of Sam was located near 15.7, -52.1
with movement NW at 8 mph.
The minimum central pressure was 966 mb
with maximum sustained winds of about 125 mph.

read more »

Hurricane Sam Forecast Advisory Number 20

September 27, 2021

Issued at 1500 UTC MON SEP 27 2021

000
WTNT23 KNHC 271452
TCMAT3

HURRICANE SAM FORECAST/ADVISORY NUMBER 20
NWS NATIONAL HURRICANE CENTER MIAMI FL

AL182021
1500 UTC MON SEP 27 2021

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

HURRICANE CENTER LOCATED NEAR 15.7N 52.1W AT 27/1500Z
POSITION ACCURATE WITHIN 15 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT

7 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 966 MB
MAX SUSTAINED WINDS 110 KT WITH GUSTS TO 135 KT.
64 KT....... 25NE 20SE 20SW 20NW.
50 KT....... 40NE 30SE 30SW 35NW.
34 KT....... 90NE 90SE 60SW 80NW.
12 FT SEAS..120NE 90SE 120SW 120NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 15.7N 52.1W...

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Hurricane Sam A Category 4 Storm
Hurricane Sam A Category 4 Storm

September 27, 2021

...SAM EXPECTED TO BE A MAJOR HURRICANE FOR SEVERAL DAYS...
HURRICANE HUNTER AIRCRAFT TO INVESTIGATE SAM LATER TODAY…

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Atlantic Tropical Weather Outlook

September 27, 2021

000

ABNT20 KNHC 271152 CCA

TWOAT

Tropical Weather Outlook...Corrected

NWS National Hurricane Center Miami FL

800 AM EDT Mon Sep 27 2021

Corrected formation chances to medium in last two paragraphs

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane

Sam, located several hundred miles east of the Lesser Antilles.

An elongated area of low pressure associated with the remnants of

Peter is located a few hundred miles east-southeast of Bermuda.

Showers and thunderstorms associated with this system have changed

little in organization since yesterday. However, environmental

conditions are marginally conducive for some further development,

and Peter could briefly become a tropical depression again during

th...

read more »