Time and Day: 0710 Sunday
The Snapshot:
Light snow showers, mostly cloudy, and benign temperatures today and tomorrow.
The Science
Current Observations:
Light snow started overnight, with
a trace on the ground. Temperatures are typical for mid-March with 26 degrees
on the upper mountain and 30 in the base area. Winds are light to moderate on
ridge tops from the west. The barometer climbed slightly yesterday and is
holding steady around 1013 millibars.
The Forecast:
A large scale, but weak low pressure center is situated over Northern
Oregon/Washington this morning. It will remain relatively stationary today and
begin to drift south overnight. It should become an open trough by Monday and
basically cease to exist. In the meantime, it will spin very light bands of
moisture through the Cascades and draw relatively cool air into our region.
Snow showers should end Monday morning.
The Long Range: Tuesday looks to bring a short-lived high pressure ridge, for a mostly
sunny and warm day. An elongated trough forms in the Pacific on Wednesday,
driving southerly flow into the forecast area. Increasing clouds Tuesday night
and Wednesday are likely, with moisture entering the region Wednesday
afternoon. Freezing levels initially look high, 5-6,000’, but lower
significantly by Friday.
24hr values daily 4am to 4am.
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Precipitation:
Sunday’s 24hr
water: .10 Snow:
1-2”
Monday’s 24hr
water: <.10 Snow:
trace-1”
Trend and Timing:
Light
snow showers ending Sunday midday, possible again Sunday night.
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Temperature:
Low: 25 High:
33
Freezing level: 3,000
Trend and Timing:
Daytime
warming is inevitable this time of year, but it will be brief before good
cooling Sunday night.
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Winds
Base: W 5-10
Ridge Top: W 10-15
Trend and Timing:
Light
to moderate west winds Sunday and Sunday night.
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