The Whatcom County Sheriff’s Office division of Emergency Management shared this update on Sunday evening rain, landslide and river conditions:
Rain is back to a normal pattern, and the freezing level is coming down, however the problems caused by the rain over the last couple days has resulted in rising rivers, lowland flooding and the closure of Chuckanut Drive due to a slide. Whatcom County will continue to see effects through at least Monday, principally from Ferndale to the mouth of the Nooksack.
Whatcom should see another round of rain on Monday with up to one-half inch of additional accumulation possible. The ground is saturated so lowland flooding and urban flooding is likely. Drivers across Whatcom County should be extra careful of water and debris over roadways, particularly in low-lying areas.
Nooksack River: According Whatcom County Public Works, water is beginning to over top some roads in the county. There have been, and may continue to be, road closures and water/debris over roads in the many locations. Areas from Ferndale to the mouth of the Nooksack, including the City of Ferndale and the Lummi Peninsula, may well see problems occurring overnight Sunday, with the potential closure of Slater Road. The Hannagan at Lynden may see water over the road over Sunday night. Whatcom County Public Works is monitoring roads, and has taken measures to ensure that road closed signs can be put up as required. Drivers who use Slater Road and Marine Drive should be extra careful of water over the road.
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Roads: A current list of roads closed/impacted can be found at the Whatcom County Public Works website at http://apps2.whatcomcounty.us/onlineapps/roadclosures/. Chuckanut Drive remains closed after a Sunday morning slide of about 20-30 yards of material and as of early Sunday afternoon the hillside was still shedding rocks. The Washington State Department of Transportation is planning to keep the road closed overnight and clean up the rock and review Monday morning.
Weather: The National Weather Service flood warning continues, and has been extended, for Ferndale until late Monday. The small craft advisory has been extended until early Monday morning. There should be no other tidal effects.