GOT CONVERGENCE

Mountain Weather Forecast -Time: 0900

Holy cow, the GFS models and all of us weather forecasters certainly underestimated what the Puget Sound Convergence Zone is capable of. This morning’s radar shows the convergence zone with plenty of water left in it. Therefore, expect the snow to continue for a few more hours, if not for the rest of the day. High pressure is rising off of the coast, so the precipitation will eventually run out this evening.

Long-term: Now to make things interesting. Tomorrow, a warm front will cause freezing levels to rise, and provide some light snow and maybe a little rain in the base area. Yikes. Let’s hope the models have this wrong too. Cool NW flow returns on Monday with more storms lined up for the middle of next week.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .25 Snow equivalent = 2-5

Total inches of water by noon tomorrow = .25 +
Total inches of snow by noon tomorrow = 3-5

Trend and Timing:
Models have the moisture in the convergence zone running out later this afternoon. Tonight will be mainly dry. More precipitation will arrive with tomorrow’s warm front about mid morning.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 24 High: 30
Freezing level: 2000’ 4000’

Trend and Timing:
Watch for freezing levels to rise through the next 24hrs. Temperatures are expected to climb above freezing during the day tomorrow.


24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 5-10 NW shifting E
Ridge Top: 5-15 NW

Trend and Timing:
Cool NW flow will continue today. Surface winds will shift easterly overnight while winds aloft remain westerly. WSW flow will accompany the warm front tomorrow.