Time and Day: 0730 Monday
The Snapshot: What a nice coating of white this morning. Snow tapering off today, more snow arrives
late tomorrow night and continues into Wednesday, heavy rain on Friday changing
to snow over the weekend.
The Science: A low-pressure system tracking
through Oregon is spinning a nice circle of snow showers up into the Cascade
this morning. The barometric pressure has
begun to rise which will eventually bring and end to the precipitation
today. The next frontal system enters the
mountains late tomorrow night with moderate snow beginning early Wednesday morning. 8-14” of snow will be possible for Stevens
Pass by the end of the day on Wednesday.
I will calculate storm totals for Wednesday with fresh models later today.
Long Range: Thursday will be in between
systems with a warm front moving over the region on Friday. Friday’s storm will have a southwest fetch of
moisture and freezing levels in the 5500-6500’ range. Thus expect moderate to heavy rain. Cooler air
filters in on Saturday and Sunday with snow possible.
The NW jet stream will continue to drive storms into
the PNW into next week.
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Precipitation
ending at 4am:
Today’s
24hr Water = .10 Snow = trace
Tomorrow’s 24hr Water = .25 Snow
= 2-4
Trend and Timing:
Showers will end today. Snow begins around midnight tomorrow night.
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24hr temperature ending at 4 am tomorrow:
Low: 28 High:
40
Freezing level: +-5000.'
Trends and Timing:
Freezing levels will fluctuate between 4500 and
5500 feet through tomorrow.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E
Ridge Top: 5-10 E shifting W
Trend and Timing:
East flow this morning will shift westerly
tomorrow.
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JM
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