Convergence Zone, Breezy Conditions in Wake of Cold Front

FastCast—Monday, Jan. 31 to Thursday, Feb. 3:

After over a week of stagnant air and foggy conditions, a frontal system on Sunday brought rain, wind, and mountain snow. Air quality is back safely in the “good” category. 0.15 to 0.8 inches of rain fell across the region, with mountain snow blanketing all the passes. During and behind the front, winds have increased as well. Gusts reached 30-45 mph in the lowlands and 45-55 mph along the Strait of Juan de Fuca. Convergence Zone banding will bring additional rain and mountain snow between Seattle and Arlington (approximately Snoqualmie to Stevens Passes). Up to 2 feet of snow will fall at the passes through Monday night. Breezy conditions, with gusts of 25-40 mph will continue at times through Monday afternoon. Dry conditions will prevail until Wednesday morning, when there is a chance of showers. These may be rain/snow mix showers as Wednesday morning temperatures will be in the upper 20s to low 30s. Drier conditions are expected on Thursday. Expect highs in the low to mid 40s, and lows in the upper 20s to mid 30s through Thursday.

——————————————————————

Continue reading the full blog below!

A frontal system moved through Western Washington on Sunday, bringing rain, wind, and mountain snow. 

The HRRR model below shows predicted snow through Monday evening. 

From Sunday evening to Monday evening, 1-2 feet of snow will fall. A Winter Storm Warning is in effect for the Cascades of King and Snohomish Counties for 8-24 inches of snow. Difficult mountain pass travel is possible through Monday evening. 

In addition, breezy winds will continue through Monday afternoon. Gusts of 25-40 mph are expected. The HRRR forecast at 3 AM Monday is below.

The strongest winds will be north and south of Seattle, especially along the Strait of Juan de Fuca. 

Special weather note: Very cold temperatures occurred in Florida this morning, with lows in the upper teens to low 30s! This is very rare!