378 

WHMY50 PGUM 182348

SMWGUM

PMZ151-190030-

/O.NEW.PGUM.MA.W.0034.261018T2348Z-261019T0030Z/



BULLETIN - IMMEDIATE BROADCAST REQUESTED

SPECIAL MARINE WARNING

NATIONAL WEATHER SERVICE TIYAN GU

947 AM CHST MON OCT 19 2026



THE NATIONAL WEATHER SERVICE IN TIYAN GUAM HAS ISSUED A



* SPECIAL MARINE WARNING FOR...

  GUAM COASTAL WATERS...



* UNTIL 1030 AM CHST.



* AT 945 AM CHST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING 

  WATERSPOUTS WAS LOCATED OVER EASTERN GUAM COASTAL WATERS ...MOVING 

  NORTH AT 25 KNOTS.



  HAZARD...WIND GUSTS TO NEARLY 50 KNOTS AND FREQUENT LIGHTNING. 

           WATERSPOUTS POSSIBLE.



  SOURCE...RADAR.



  IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY 

           HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY 

           HIGHER WINDS AND SUDDENLY HIGHER WAVES.



* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY OPEN WATERS.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE 

EXPECTED.



FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT ON THE 

OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED 

METAL OBJECTS.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



MOVE TO SAFE HARBOR IMMEDIATELY AS GUSTY WINDS AND HIGH WAVES ARE

EXPECTED.



FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF CAUGHT ON THE

OPEN WATER STAY BELOW DECK IF POSSIBLE...KEEP AWAY FROM UNGROUNDED

METAL OBJECTS.



&&



LAT...LON 1419 14443 1387 14495 1372 14489 1385 14499

      1347 14560 1292 14529 1323 14472 1338 14476

      1353 14494 1371 14484 1341 14463 1324 14466

      1348 14424 

TIME...MOT...LOC 2347Z 140DEG 23KT 1321 14483 



WATERSPOUT...POSSIBLE

HAIL...0.00IN

WIND...49KTS



$$



DD/TM