February 27, 2013

Mountain Weather Forecast -Time: 0900

Get out and ride today if possible, because the conditions will drastically change tomorrow. A warm front will move up from the southwest tomorrow morning. This will generate rising freezing levels and eventually rain to all elevations of the resort by the end of the day.

Long-range: Avalanche conditions will become extreme with a significant rain on snow event possible tomorrow night and into Friday. The moisture will lift north of Stevens Pass on Friday for a relatively dry evening. There is much uncertainty about what this storm will leave in its wake for the weekend; so I will leave that for tomorrow or Friday’s forecast.

24hr Accumulative Precipitation Totals Starting at Noon Today:
Water by 4am = .10 Snow equivalent = 1-2

Total inches of water by noon tomorrow = .5+
Total inches of snow by noon tomorrow = 3-6

Trend and Timing:
Light snow will develop tonight. The snow will intensify tomorrow morning and then switch to rain sometime mid to late afternoon. Rain totals by Friday morning could exceed +2” or water.

24hr Base Area Temperatures (F) Starting at Noon Today:
Low: 26 High: 38
Freezing level: 3000’ 5500’

Trend and Timing:
East flow will help keep surface temperatures at or just below freezing until noon or so tomorrow. Freezing levels are expected to rise above 4000’ early afternoon tomorrow. Freezing levels will continue to rise to around 5500’ and stay high through Friday and maybe even Saturday.

24hr Winds Speed (mph)/Direction Starting at Noon Today:
Base: 0-5 E
Ridge Top: 0-10 SE

Trend and Timing:
East flow will develop today. Westerly flow will eventually kick in tomorrow afternoon and strengthen.



J.Meriwether

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