635 

WHUS56 KSEW 311319

SMWSEW

PZZ173-176-311345-

/O.NEW.KSEW.MA.W.0001.261031T1319Z-261031T1345Z/



BULLETIN - IMMEDIATE BROADCAST REQUESTED

Special Marine Warning

National Weather Service Seattle WA

619 AM PDT Sat Oct 31 2026



The National Weather Service in Seattle has issued a



* Special Marine Warning for...

  Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60

  Nm...

  Waters From James Island To Point Grenville 10 To 60 Nm...



* Until 645 AM PDT.



* At 619 AM PDT, a severe thunderstorm capable of producing

  waterspouts was located 27 nm west of Point Grenville, moving north

  at 10 knots.



  HAZARD...Waterspouts.



  SOURCE...Radar.



  IMPACT...Waterspouts can easily overturn boats and create locally 

           hazardous seas.



* The severe thunderstorm will remain over mainly open waters.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Thunderstorms can produce sudden waterspouts. Waterspouts can easily

overturn boats and create locally hazardous seas. Seek safe harbor

immediately.



&&



LAT...LON 4714 12485 4714 12498 4738 12507 4737 12470

TIME...MOT...LOC 1319Z 185DEG 10KT 4721 12492 



WATERSPOUT...POSSIBLE

HAIL...0.00IN

WIND...<34KTS



$$



HR






412 

FZUS76 KSEW 311335

MWSSEW



Marine Weather Statement

National Weather Service Seattle WA

635 AM PDT Sat Oct 31 2026



PZZ173-176-311345-

/O.EXP.KSEW.MA.W.0001.000000T0000Z-261031T1345Z/

635 AM PDT Sat Oct 31 2026



...THE SPECIAL MARINE WARNING WILL EXPIRE AT 645 AM PDT...



The affected areas were... 

Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm...

Waters From James Island To Point Grenville 10 To 60 Nm...



The thunderstorm has weakened and no longer poses a significant

threat to boaters.



&&



LAT...LON 4714 12485 4714 12498 4738 12507 4737 12470

TIME...MOT...LOC 1335Z 185DEG 10KT 4725 12492 



$$



HPR