Headline:
Special Marine Warning issued November 20 at 2:47PM PST until November 20 at 3:15PM PST by NWS Portland OR
Event:
Special Marine Warning
Urgency:
Immediate
Effective:
November 20, 2024 - 2:47pm
Expires:
November 20, 2024 - 3:15pm
Description:
For the following areas...
Coastal waters from Cape Shoalwater WA to Cape Falcon OR out 10 nm...
Waters from Cape Shoalwater WA to Cape Falcon OR from 10 to 60 nm...
At 247 PM PST, a severe thunderstorm capable of producing waterspouts
was located over Columbia River Buoy 29, moving north at 35 knots.
HAZARD...Waterspouts and wind gusts 34 knots or greater.
SOURCE...Radar indicated.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves.
Locations impacted include...
Columbia River Buoy 29.
Instruction:
Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.
Frequent lightning is occurring with this storm. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.
Area Description:
Coastal waters from Cape Shoalwater WA to Cape Falcon OR out 10 nm; Waters from Cape Shoalwater WA to Cape Falcon OR from 10 to 60 nm
Forcast Office:
NWS Portland OR