Upcoming Atmospheric River Weather Statement
General Observation: The second atmospheric river of the season is forecasted to bring heavy rains to our region Friday. At this time, the river is expected to crest below flood stage at all forecast points, with the exception of the South Fork of the Nooksack at Saxon Bridge which may experience minor flooding. You can check the most current weather forecasts and projected Nooksack River levels on our website at www.whatcomcounty.us/floodforecast.
While the likelihood of flooding is low, all residents, particularly in low-lying areas that are subject to flooding, should be reviewing their flood preparation plans, be clear about exit routes, and prepare for the possibility of flooding.
Significant Issues:
There are currently no issues anticipated with the incoming storm system.
Potential Impacts and Timing
This second Atmospheric River of the season will impact the region Thursday evening through Saturday morning.
The National Weather Service considers this a potentially “moderate” rainfall and wind event. Wind and rain will begin late Thursday, with the heaviest rains expected Friday and Saturday.
The National Weather Service says the highest chance for flooding is along the Skokomish, Snoqualmie and Stillaguamish Rivers.
Environment Canada has issued a Special Weather Statement for the Fraser Valley including Chilliwack and Abbotsford, for heavy rain and strong winds, but have not issued any statements regarding flooding and has said this atmospheric river is expected to be similar in strength to the most recent event on Sunday, October 30.
The heavy rain may lead to flooding in low-lying areas, underpasses, and areas with poor drainage (e.g. clogged storm drains). Ponding of water on roadways and poor visibility will lead to difficult travel conditions
Puget Sound Energy (PSE) is anticipating high winds up to 50 mph from 5 p.m. this afternoon to 8 a.m. Friday. PSE is closely watching the weather forecast and are prepared to respond to potential power outages in our service area.
Whatcom County Actions
Both Whatcom County Public Works River and Flood Division and the Whatcom County Sheriff’s Office Division of Emergency Management are actively monitoring conditions throughout the Nooksack watershed and are prepared to take action(s) should conditions change.