FastCast—Saturday, Oct. 30 to Monday, Nov. 1:
After the Puget Sound area was drenched by 1-3 inches of rain since Thursday morning, we will begin to dry out this weekend. Chilly nights and sunny days are expected, with highs in the mid-upper 50s and lows in the 30s. Frost and freezing temperatures are possible in outlying areas. Breezy northerly winds gusting 15-30 mph are possible on Saturday, strongest closer to Puget Sound. Clouds increase on Monday morning, and up to 0.2” of rain is possible by late Monday night. Highs on Monday reach the upper 50s, with lows in the low 40s.
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What an active few days! Western Washington has been drenched due to an atmospheric river. Below are precipitation totals from Thursday to Friday.
Totals generally ranged between 1.5 and 2.75 inches, except 3-7 inches in the mountains. Rivers north of I-90 rose rapidly and flooded, with the Skagit, Snoqualmie, and Snohomish still in flood stage at 10 PM Friday, along with the commonly flooded Skokomish River that drains the SW Olympic slopes near Hood Canal.
Urban flooding was observed around the area as well, especially as a slow-moving frontal rain and dropped around 0.5-0.75” of rain within one hour (around 4:30-5:30 PM). To see a video of urban flooding in Federal Way, click here.
With no more rain likely in October, the month will end with rainfall far above average. Totals of 5-6.5” were recorded in the Lowlands, with 7-20” on the coast.
Additionally, this rainfall has caused most of Western Washington to be removed from drought coverage on the US Drought Monitor’s latest update.
Severe, exceptional, and extreme drought still remains across the majority of Eastern Washington. More rain in Eastern Washington will help to mitigate the drought, which has decreased, but not nearly enough. West of the mountains, moderate drought and abnormally dry conditions remain from approximately Mount Rainier southward and in the San Juan Islands and the coastline of the northern inland waters.
Expect a sunny weekend, with highs in the mid-upper 50s and chilly lows in the 30s. Breezy northerly winds gusting up to 30 mph are possible on Saturday, strongest near Puget Sound. Clouds & showers arrive by Monday afternoon, with rain totaling up to 0.2”. A cloudy day is likely on Tuesday, then more showers arrive by Wednesday afternoon.
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