Flood watch for the Nooksack in Whatcom County

Flood watch
National weather service Seattle Wa
501 am pst Mon Jan 11 2010

A strong frontal system will bring periods of heavy rain to the Olympics and north Cascades through Tuesday...and possibly into Wednesday. Strong southerly low level winds will produce the heaviest rain over the south slopes of the Olympics and over the far north Cascades. This weather system will be warm with the snow level above 6000 feet over the Olympics and above 5000 feet over the north Cascades.

Clallam-Grays Harbor-Jefferson-Mason-Whatcom-
501 am pst Mon Jan 11 2010

Flood watch remains in effect from noon pst today through Wednesday afternoon...

The flood watch continues for* Portions of western Washington...including the following Counties... Grays harbor...Clallam...Jefferson...Whatcom.. Mason.

 From noon pst today through Wednesday afternoon

 This is a strong wet frontal system. Low level southerly winds  40 to 65 knots will produce strong upslope flow over the Olympics. Between 4 and 6 inches of rain may fall in the Olympic Mountains through Tuesday afternoon. This will likely drive the Skokomish river above flood stage later today and potentially push the Bogachiel river above flood stage late tonight or Tuesday morning. Other rivers and streams draining off of the Olympics may also reach flood stage late tonight or Tuesday morning.

 Heavy rain is also expected over the far north cascades around the Mount Baker area. 3 to 4 inches of rain may fall through Tuesday afternoon. Flooding is possible on the Nooksack River system late tonight or Tuesday morning...but it is not yet certain.

Precautionary/preparedness actions...

A flood watch means there is a potential for flooding based on the current forecasts. Those living in areas prone to flooding  should be prepared to take action should flooding develop.

Monitor forecasts from the national weather service for the latest updates or warnings.

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