Special Marine Warning
Special Marine Warning
GMZ034-055-075-170630-
/O.NEW.KKEY.MA.W.0334.250917T0529Z-250917T0630Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Key West FL
129 AM EDT Wed Sep 17 2025
The National Weather Service in Key West has issued a
* Special Marine Warning for...
Straits of Florida from Halfmoon Shoal to 20 nm west of Dry
Tortugas out 60 nm...
Gulf of America including Dry Tortugas and Rebecca Shoal Channel...
* Until 230 AM EDT.
* At 129 AM EDT, a strong thunderstorm was located 11 nm southeast of
Tortugas Ecological Reserve South, moving west at 15 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...National Weather Service Meteorologist.
IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher
waves, frequent lightning, and heavy downpours.
* Locations in the warning include...
Tortugas Ecological Reserve South.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare for wind gusts in excess of 34 knots, steep and fast-building
seas, frequent lightning, and blinding downpours. Stay low or go
below, and make sure all on board are wearing life jackets.
&&
LAT...LON 2452 8329 2449 8272 2415 8272 2412 8329
TIME...MOT...LOC 0529Z 107DEG 17KT 2428 8298
HAIL...0.00IN
WIND...>34KTS
$$
AP
Special Marine Warning
GMZ035-044-054-170600-
/O.NEW.KKEY.MA.W.0333.250917T0523Z-250917T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Key West FL
123 AM EDT Wed Sep 17 2025
The National Weather Service in Key West has issued a
* Special Marine Warning for...
Hawk Channel and Straits of Florida from west end of Seven Mile
Bridge to Halfmoon Shoal out 20 nm...
Gulf of America from west end of Seven Mile Bridge to Halfmoon
Shoal out to 5 fathoms...
* Until 200 AM EDT.
* At 123 AM EDT, a strong thunderstorm was located near Cosgrove
Shoal Light, moving west at 15 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...National Weather Service Meteorologist.
IMPACT...Expect wind gusts in excess of 34 knots, suddenly higher
waves, frequent lightning, and heavy downpours.
* Locations in the warning include...
Cosgrove Shoal Light and Marquesas Keys.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor as quickly, and as safely as
possible. When downpours reduce visibility, slow down.
&&
LAT...LON 2460 8228 2457 8211 2456 8211 2457 8210
2455 8200 2442 8207 2444 8234
TIME...MOT...LOC 0523Z 099DEG 17KT 2450 8215
HAIL...0.00IN
WIND...>34KTS
$$
AP
Coastal Flood Statement
Coastal Hazard Message
National Weather Service Key West FL
1033 PM EDT Tue Sep 16 2025
FLZ076-171000-
/O.CON.KKEY.CF.S.0003.000000T0000Z-250917T1000Z/
Monroe Upper Keys-
1033 PM EDT Tue Sep 16 2025
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT...
* WHAT...Minor saltwater flooding.
* WHERE...Upper Florida Keys.
* WHEN...Through late tonight.
* IMPACTS...Minor saltwater flooding of low elevation streets and
lots is likely. Some storm drains will overflow, and some
seawalls and docks will be overtopped. Boaters can expect less
clearance under fixed bridges. Motorists should remember that
persistent puddles around the times of high tide are almost
certain to contain a mix of saltwater. Little improvement is
expected, even at lower tides.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
$$
MJV
Short Term Forecast
Short Term Forecast
National Weather Service Key West FL
1256 AM EDT Wed Sep 17 2025
FLZ077-078-GMZ032-035-043-044-053>055-072>075-170600-
Monroe Middle Keys-Monroe Lower Keys-
Bayside and Gulfside from Craig Key to west end of Seven Mile Bridge-
Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal
out to 5 Fathoms-
Hawk Channel from Craig Key to west end of Seven Mile Bridge out to
the reef-
Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
Straits of Florida from Craig Key to west end of Seven Mile Bridge
out 20 NM-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal out 20 NM-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas
out 20 NM-
Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out-
Straits of Florida from Craig Key to west end of Seven Mile Bridge
20 to 60 NM out-
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 NM out-
Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas
20 to 60 NM out-
Including the Communities of Marathon and Key West
1256 AM EDT Wed Sep 17 2025
.NOW...
Through 2 am, scattered showers with embedded thunderstorms will
move southwest to west at 5 to 10 knots through the distant Straits
mainly south of the Dry Tortugas, and the nearshore waters of the
Lower Keys. The stronger activity will be capable of blinding
downpours, wind gusts of near 25 knots, and frequent lightning
strikes.
$$
