Alert archive / Florida / Special Marine Warnings in 2021

Special Marine Warning 14, NWS Key West, FL

April 12, 2021

NWS Key West, FL issued this special marine warning at Apr 12, 2021, 2:11 AM EDT. It was in force for 50 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: Apr 12, 2021, 2:11 AM EDT (06:11 UTC)
Expired: Apr 12, 2021, 3:01 AM EDT
In force: 50 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 Apr 11, 10:06 PM EDT, 4 hours 5 minutes earlier.

Area forecast discussion, Apr 11, 10:06 PM EDT, 4 hours 5 minutes before

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Hazardous weather outlook, Apr 11, 4:56 AM EDT, 21 hours 15 minutes before

Hazardous Weather Outlook
National Weather Service Key West FL
456 AM EDT Sun Apr 11 2021

FLZ076>078-GMZ031>035-042>044-052>055-072>075-121000-
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-
456 AM EDT Sun Apr 11 2021

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

.DAY ONE...TODAY AND TONIGHT

Scattered strong to marginally severe thunderstorms will be
possible across the Florida Keys and the surrounding coastal
waters late this afternoon and tonight, with the potential for a
significant squall line to move southward through the Keys waters
during the evening hours. The primary thunderstorm hazards will
be strong winds and cloud to surface lightning strikes. There is
the potential for locally damaging winds with any thunderstorms,
especially if a squall line moves through the area.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Isolated thunderstorms will be possible across the Florida Keys
and the surrounding coastal waters on Monday. The primary
thunderstorm hazards will be cloud to surface lightning strikes
and locally gusty winds. Conditions may be favorable for an island
cloud line to develop on Monday, with the potential for
waterspouts across the nearshore waters.

Otherwise, no hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

In the hours before

Local storm report, Apr 11, 8:11 PM EDT, 6 hours before

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Local storm report, Apr 11, 9:02 PM EDT, 5 hours 9 minutes before

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Local storm report, Apr 11, 9:26 PM EDT, 4 hours 45 minutes before

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Local storm report, Apr 11, 9:33 PM EDT, 4 hours 38 minutes before

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The office that day

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

Issued	Product	Office	Lasted
Apr 11, 8:12 PM EDT	Special Marine Warning	KEY	63 min
Apr 12, 1:19 AM EDT	Special Marine Warning	KEY	56 min
Apr 12, 5:31 AM EDT	Special Marine Warning	KEY	59 min
Apr 12, 6:25 AM EDT	Special Marine Warning	KEY	65 min
Apr 12, 6:32 AM EDT	Special Marine Warning	KEY	58 min
Apr 12, 7:04 AM EDT	Special Marine Warning	KEY	26 min
Apr 12, 7:19 AM EDT	Special Marine Warning	KEY	18 min
Apr 12, 7:28 AM EDT	Special Marine Warning	KEY	62 min
Apr 12, 7:34 AM EDT	Special Marine Warning	KEY	56 min
Apr 12, 7:43 AM EDT	Special Marine Warning	KEY	47 min
Apr 12, 8:32 AM EDT	Special Marine Warning	KEY	43 min
Apr 12, 8:40 AM EDT	Special Marine Warning	KEY	35 min
Apr 12, 9:16 AM EDT	Special Marine Warning	KEY	29 min
Apr 12, 9:45 AM EDT	Special Marine Warning	KEY	30 min
Apr 12, 10:44 AM EDT	Small Craft Advisory	KEY	6 hr

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.