Special Marine Warning
NWS Key West FL ยท US
Details
Special Marine Warning Issued September 18 At 5:26PM EDT Until September 18 At 6:00PM EDT By NWS Key West FL
- Event
- Special Marine Warning
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Immediate
- Severity
- Severe
- Certainty
- Likely
- Response
- Avoid
Description
Overview
SMWKEY The National Weather Service in Key West has issued a * Special Marine Warning for... Gulf Waters from East Cape Sable to Chokoloskee 20 to 60 nm out and beyond 5 fathoms... Gulf of America from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 fathoms... Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef... * Until 600 PM EDT. * At 526 PM EDT, a strong thunderstorm was located over Smith Shoal Light, moving southwest at 10 knots.
Hazard
Wind gusts 34 knots or greater.
Source
National Weather Service Meteorologist.
Impacts
Expect wind gusts in excess of 34 knots, suddenly higher waves, frequent lightning, and heavy downpours. * Locations in the warning include... Smith Shoal Light, Northwest Channel Buoy 1, and Cottrell Key.
Instructions
Boaters should seek safe harbor as quickly, and as safely as possible. When downpours reduce visibility, slow down. Intense and continuous lightning is occurring with this storm. Stay low, or go below. Lower VHF antenna, outriggers, fishing rods, and umbrellas.
Affected areas
- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms
- Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms
- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef
Public contact
- Issuer
- NWS Key West FL
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~1m16s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M2V6N81P00MTYAQ74NPEEWW7
- Identifier
- urn:oid:2.49.0.1.840.0.1b801088d87d2f1053b661aa7d0f2489faa8faf9.001.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS Key West FL
- AWIPS ID
- CAPKEY
- NWWS sequence
- nwws_processor.5756
- WMO heading
- XOUS52
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- United States (US)
- WMO bulletin number
- 52
Event codes
| Name | Value |
|---|---|
| SAME | SMW |
| NationalWeatherService | MAW |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | SMWKEY |
| WMOidentifier | WHUS52 KKEY 182126 |
| eventMotionDescription | 2026-09-18T21:26:00-00:00...storm...061DEG...12KT...24.69,-81.97 |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.KKEY.MA.W.0279.260918T2126Z-260918T2200Z/ |
| eventEndingTime | 2026-09-18T18:00:00-04:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Gulf of America from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms
- Gulf of America from West End of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms
- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef
| Name | Value |
|---|---|
| SAME | 077033 |
| SAME | 077035 |
| SAME | 077044 |
| UGC | GMZ033 |
| UGC | GMZ035 |
| UGC | GMZ044 |
- Polygons
- 24.72,-81.67 24.51,-81.9 24.73,-82.24 24.93,-81.9 24.72,-81.67