156 WHUS52 KKEY 180821 SMWKEY GMZ055-075-180845- /O.NEW.KKEY.MA.W.0332.261018T0821Z-261018T0845Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Key West FL 421 AM EDT Sun Oct 18 2026 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... * Until 445 AM EDT. * At 421 AM EDT, a strong thunderstorm with possible waterspouts was located 20 nm southeast of Tortugas Ecological Reserve South, moving south at 5 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...National Weather Service Meteorologist. IMPACT...Waterspouts can quickly form and capsize boats, cause considerable damage to vessels and create suddenly higher waves. Expect wind gusts in excess of 34 knots, suddenly higher waves, frequent lightning, and heavy downpours. * The strong thunderstorm will remain over mainly open waters. 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 2433 8289 2431 8269 2408 8262 2412 8297 TIME...MOT...LOC 0821Z 007DEG 6KT 2425 8280 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ LIW  307 WHMY50 PGUM 180826 SMWGUM PMZ151-180845- /O.NEW.PGUM.MA.W.0028.261018T0826Z-261018T0845Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE TIYAN GU 626 PM CHST SUN OCT 18 2026 THE NATIONAL WEATHER SERVICE IN TIYAN HAS ISSUED A * SPECIAL MARINE WARNING FOR... SOUTHEASTERN GUAM COASTAL WATERS... * UNTIL 645 PM CHST. * AT 626 PM CHST, A SEVERE THUNDERSTORM PRODUCING WATERSPOUTS WAS LOCATED 30 NM SOUTHEAST OF IPAN BUOY, MOVING NORTH AT 30 KNOTS. HAZARD...WATERSPOUTS. SOURCE...RADAR INDICATED. IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. * LOCATIONS IMPACTED INCLUDE... MAINLY OPEN WATERS OF GUAM COASTAL WATERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOVE TO SAFE HARBOR UNTIL HAZARDOUS WEATHER PASSES. && LAT...LON 1289 14530 1301 14514 1351 14499 1357 14525 1296 14534 1295 14534 1293 14532 1292 14532 1290 14530 TIME...MOT...LOC 0826Z 167DEG 29KT 1308 14523 WATERSPOUT...OBSERVED MAX HAIL SIZE...0.00 IN MAX WIND GUST...<34 KTS $$ EM  087 WHMY50 PGUM 180828 SMWGUM PMZ151-180845- /O.NEW.PGUM.MA.W.0029.261018T0828Z-261018T0845Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE TIYAN GU 626 PM CHST SUN OCT 18 2026 THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... GUAM COASTAL WATERS... * UNTIL 645 PM CHST. * AT 626 PM CHST...A SHOWER CAPABLE OF PRODUCING WATERSPOUTS WAS LOCATED OVER SOUTHERN GUAM WATERS OF MOVING NORTH AT 30 KNOTS. HAZARD...WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER. SOURCE...RADAR. IMPACT...WATERSPOUTS CAN CREATE LOCALLY HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * THE SHOWER WILL REMAIN OVER MAINLY OPEN WATERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY. && LAT...LON 1284 14501 1283 14483 1315 14477 1317 14504 TIME...MOT...LOC 0826Z 177DEG 28KT 1291 14492 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ CO  738 WHMY50 PGUM 180835 SMWGUM PMZ151-180900- /O.NEW.PGUM.MA.W.0030.261018T0835Z-261018T0900Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE TIYAN GU 634 PM CHST SUN OCT 18 2026 THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... GUAM COASTAL WATERS... * UNTIL 700 PM CHST. * AT 634 PM CHST...A SHOWER WAS LOCATED OVER NORTHERN GUAM WATERS MOVING NORTHWEST AT 35 KNOTS. HAZARD...WIND GUSTS 34 KNOTS OR GREATER. SOURCE...RADAR. IMPACT...SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * THE SHOWER WILL REMAIN OVER MAINLY OPEN WATERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY. && LAT...LON 1393 14416 1411 14437 1380 14456 1374 14447 TIME...MOT...LOC 0834Z 137DEG 34KT 1382 14446 HAIL...0.00IN WIND...>34KTS $$ CO  256 FZUS72 KKEY 180838 MWSKEY Marine Weather Statement National Weather Service Key West FL 438 AM EDT Sun Oct 18 2026 GMZ055-075-180845- /O.CON.KKEY.MA.W.0332.000000T0000Z-261018T0845Z/ 438 AM EDT Sun Oct 18 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 445 AM EDT... For the following areas... Straits of Florida from Halfmoon Shoal to 20 nm west of Dry Tortugas out 60 nm... At 438 AM EDT, a strong thunderstorm was located 21 nm southeast of Tortugas Ecological Reserve South, moving south at 5 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. The strong thunderstorm will remain over mainly open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for wind gusts in excess of 34 knots, steep and fast-building seas, frequent lightning strikes, and blinding downpours. Stay low or go below, and make sure all on board are wearing life jackets. && LAT...LON 2433 8289 2431 8269 2408 8262 2412 8297 TIME...MOT...LOC 0838Z 007DEG 6KT 2422 8280 HAIL...0.00IN WIND...>34KTS $$ LIW  576 FZUS72 KKEY 180843 MWSKEY Marine Weather Statement National Weather Service Key West FL 443 AM EDT Sun Oct 18 2026 GMZ055-075-180853- /O.EXP.KKEY.MA.W.0332.000000T0000Z-261018T0845Z/ 443 AM EDT Sun Oct 18 2026 ...THE SPECIAL MARINE WARNING WILL EXPIRE AT 445 AM EDT... && LAT...LON 2433 8289 2431 8269 2408 8262 2412 8297 TIME...MOT...LOC 0843Z 007DEG 6KT 2422 8280 $$ LIW  212 WHMY50 PGUM 180846 SMWGUM PMZ151-180915- /O.NEW.PGUM.MA.W.0031.261018T0846Z-261018T0915Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE TIYAN GU 646 PM CHST SUN OCT 18 2026 THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... GUAM COASTAL WATERS... * UNTIL 715 PM CHST. * AT 646 PM CHST...A SHOWER CAPABLE OF PRODUCING WATERSPOUTS WAS LOCATED OVER SOUTHERN GUAM WATERS MOVING NORTH AT 30 KNOTS. HAZARD...WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER. SOURCE...RADAR. IMPACT...WATERSPOUTS CAN CREATE LOCALLY HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * THE SHOWER WILL REMAIN OVER MAINLY OPEN WATERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY. && LAT...LON 1272 14505 1306 14490 1312 14517 1277 14521 1269 14510 TIME...MOT...LOC 0846Z 167DEG 29KT 1277 14512 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ CO  798 FZUS72 KKEY 180848 MWSKEY Marine Weather Statement National Weather Service Key West FL 448 AM EDT Sun Oct 18 2026 GMZ055-075-180915- 448 AM EDT Sun Oct 18 2026 ...A STRONG THUNDERSTORM SOUTHEAST OF THE DRY TORTUGAS... The areas affected include... Straits of Florida from Halfmoon Shoal to 20 nm west of Dry Tortugas out 60 nm... At 447 AM EDT, National Weather Service meteorologists detected a strong thunderstorm, capable of producing wind gusts near 30 knots. This thunderstorm was located 23 nm southeast of Tortugas Ecological Reserve South, moving south at 10 knots. The strong thunderstorm will remain over mainly open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for thunderstorms with wind gusts near 30 knots, locally rough and confused seas, occasional lightning strikes, and potentially blinding downpours. Get to a safe port as quickly, and as safely as possible. When downpours reduce visibility, slow down. && LAT...LON 2426 8290 2420 8268 2399 8268 2408 8303 $$ LIW  152 WHMY50 PGUM 180849 SMWGUM PMZ151-180915- /O.NEW.PGUM.MA.W.0032.261018T0849Z-261018T0915Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE TIYAN GU 648 PM CHST SUN OCT 18 2026 THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A * SPECIAL MARINE WARNING FOR... GUAM COASTAL WATERS... * UNTIL 715 PM CHST. * AT 648 PM CHST...A SHOWER CAPABLE OF PRODUCING WATERSPOUTS WAS LOCATED OVER EASTERN GUAM WATERS MOVING NORTH AT 30 KNOTS. HAZARD...WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER. SOURCE...RADAR. IMPACT...WATERSPOUTS CAN CREATE LOCALLY HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY HIGHER WINDS AND SUDDENLY HIGHER WAVES. * THE SHOWER WILL REMAIN OVER MAINLY OPEN WATERS. PRECAUTIONARY/PREPAREDNESS ACTIONS... WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY HAZARDOUS SEAS. SEEK SAFE HARBOR IMMEDIATELY. && LAT...LON 1317 14522 1314 14513 1352 14494 1358 14521 TIME...MOT...LOC 0848Z 167DEG 29KT 1318 14517 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ CO