Alert archive / Florida / Special Marine Warnings in 2021

Special Marine Warning 330, NWS Key West, FL

December 21, 2021

NWS Key West, FL issued this special marine warning at Dec 21, 2021, 10:48 AM EST. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 21, 2021, 10:48 AM EST (15:48 UTC)
Expired: Dec 21, 2021, 11:45 AM EST
In force: 57 min
Issued by: NWS Key West, FL
Area: Storm-based polygon
Hail: 0.0 in
Wind: 34.0 mph

What forecasters said that day

The local office's own words before this special marine warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Key West, FL wrote its last area forecast discussion before this special marine warning went out at Dec 21, 3:44 AM EST, 7 hours 4 minutes earlier.

Area forecast discussion, Dec 21, 3:44 AM EST, 7 hours 4 minutes before

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Hazardous weather outlook, Dec 21, 5:12 AM EST, 5 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Key West FL
512 AM EST Tue Dec 21 2021

FLZ076>078-GMZ031>035-042>044-052>055-072>075-221015-
Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys-
Florida Bay including Barnes Sound, Blackwater Sound, and
Buttonwood Sound-
Bayside and Gulf side from Craig Key to west end of Seven Mile
Bridge-
Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out
and beyond 5 fathoms-
Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel-
Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 Fathoms-
Hawk Channel from Ocean Reef to Craig Key out to the reef-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out
to the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
Straits of Florida from Ocean Reef to Craig Key out 20 NM-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
Straits of Florida from Craig Key to west end of Seven Mile
Bridge 20 to 60 NM out-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry
Tortugas 20 to 60 NM out-
512 AM EST Tue Dec 21 2021

This Hazardous Weather Outlook is for the Florida Keys and
adjacent coastal waters.

.DAY ONE...TODAY AND TONIGHT
Showers and thunderstorms will develop ahead of an approaching
frontal boundary. Moderate to heavy rain fall is expected and
frequent lightning over the coastal waters and islands. A few
strong to marginally severe thunderstorms may bring brief winds
gust up to 50 mph early this morning. Weather conditions will
begin to improve late tonight as the frontal boundary moves south
of the Keys.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Dry and fair weather conditions will begin on Wednesday and
continue through the remainder of the long-term period.

.SPOTTER INFORMATION STATEMENT...

In the hours before

Local storm report, Dec 21, 8:34 AM EST, 2 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
834 AM EST TUE DEC 21 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0811 AM     MARINE TSTM WIND 14 NW KEY WEST          24.72N 81.92W
12/21/2021  M43 MPH          GMZ033             FL   MESONET

            AT 811AM EST A WIND GUST OF 43 MPH, OR 37 KTS, WAS
            OBSERVED BY THE WEATHERFLOW MESONET SITE AT SMITH SHOLE
            LIGHT.

&&

DE SOLO

Local storm report, Dec 21, 9:57 AM EST, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
957 AM EST TUE DEC 21 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 AM     TSTM WND GST     10 SW KEY WEST          24.46N 81.88W
12/21/2021  M39 MPH          GMZ044             FL   C-MAN STATION

            AT 830 AM EST A WIND GUST OF 39 MPH, OR 34 KTS, WAS
            OBSERVED BY THE C-MAN STATION AT SAND KEY.

0901 AM     TSTM WND GST     14 NW KEY WEST          24.72N 81.91W
12/21/2021  M40 MPH          GMZ033             FL   MESONET

            AT 901 AM EST A WIND GUST OF 40 MPH, OR 35 KTS, WAS
            OBSERVED BY THE WEATHERFLOW MESONET SITE AT SMITH SHOLE
            LIGHT.

&&

DE SOLO

The office that day

Everything else NWS Key West, FL issued on the same UTC day.

Issued	Product	Office	Lasted
Dec 21, 1:32 AM EST	Special Marine Warning	KEY	13 min
Dec 21, 1:56 AM EST	Special Marine Warning	KEY	29 min
Dec 21, 2:24 AM EST	Special Marine Warning	KEY	43 min
Dec 21, 4:55 AM EST	Small Craft Advisory	KEY	24 hr
Dec 21, 10:06 AM EST	Special Marine Warning	KEY	54 min
Dec 21, 11:41 AM EST	Special Marine Warning	KEY	64 min
Dec 21, 11:44 AM EST	Special Marine Warning	KEY	61 min
Dec 21, 12:40 PM EST	Special Marine Warning	KEY	65 min

Nearby

Special Marine Warnings in Florida, 2021 Every special marine warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.