Discussion: As advertised, two progressively stronger Pacific storms will begin to affect the Cascade Mountains today. This morning’s radar shows the leading edge of the precipitation just about to reach the mountains.
Long-term: Heavy snow is expected to continue through Monday.
24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .5-.75 Snow equivalent = 6-10
Total inches of water by noon tomorrow = +.75
Total inches of snow by noon tomorrow = 8-12
Trend and Timing:
The snow will intensify through the day with convergence conditions setting up late tonight or early tomorrow morning. There will be a very short break tomorrow morning with the next front hitting mid day. Another +1” of water is expected by early Monday morning.
24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 20 High: 26
Freezing level: 1500’ 2500’
Trend and Timing:
The first front is a warm front, so expect temperatures to rise as the front passes. Freezing levels will remain well below 4000’ through the weekend.
24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 E, shifting W and strengthening after 10pm
Ridge Top: 0-10 E shifting W and strengthening overnight.
Trend and Timing:
Winds will also be a factor with strong westerlies likely accompanying the convergence flow tonight and early tomorrow morning. 20+ ridge top winds will be possible during the early morning hours.
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