Time and Day: 0720 Sunday
The Snapshot: Moderate snow during the day Sunday and early
Monday, ending Monday midday.
Current Observations: 2”
of snow in the past 24 hours brings our season snow total to 201”! Temperatures are in the mid 20’s
across the mountain and winds are light out of the east. The barometer is
falling slowly as the front approaches.
The Science: The low pressure cell that has
been parked offshore spinning moderate bands of snow our way the past few days
is moving inland today. The warm front is beginning to affect the coast and
should cross the crest mid-morning. Winds will be strong in western Washington
from the SW, which will likely not be noticeable at Stevens Pass. After the
trough passes mid-afternoon, winds will shift to westerly and become gusty.
Westerly upper level flow Sunday night and Monday morning will support
orographic showers with a brief period of moderate to heavy snow possible early
Monday morning.
The Long Range: Snow showers end midday Monday,
with clearing skies likely. The next strong system arrives Tuesday morning with
rising freezing levels (3-4,000’) and heavy snow possible. The weather remains
active through next weekend.
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24hr Precipitation ending at 4am:
Today 24hr water: .5-.75 Snow:
6-8”
Tomorrow’s 24hr water: .25-.5 Snow:
4-6”
Trend and Timing:
Light to moderate snow Sunday, with a
brief break overnight before moderate snow begins again in the early Monday
morning hours. Most of Day 2 snow will be a continuation of Day 1.
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24hr temperature
ending at 4am:
Low: 23 High: 30
Free air freezing level: 2,000
Trend and Timing:
There will be some daytime warming and
a bit of warm(er) air Sunday mid-morning, but overall temps should remain
steady through Monday.
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24hr Winds (mph) ending at 4am:
Base: E 5-10, then W 10-15
Ridge Top: E 10-15, then SW/W 20-30 and gusty
Trend and Timing:
Light east winds in advance of the
front, shifting to SW midday and W overnight, becoming moderate to strong and
gusty.
DV
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