Time and Day: 0700 Tuesday
The Snapshot: Snow
until noon or so today then changing to rain then back to snow tonight, snow
showers continue tomorrow. The wind will also be a factor tonight and early tomorrow morning. Warm
and wet weather continues through the weekend.
The Science: 5” snow has fallen
thus far with a few more inches likely before it shifts to rain. Cool easterly flow influence should keep the
moisture as snow until the approaching warm front passes east of the crests
around noon or so. Freezing levels are
expected to rise to around 6000’ in the wake of the front and then fall tonight
with the arrival of the trailing cold front.
The moisture shifts to showers tonight with a brief break in the precipitation
during the day tomorrow. Another strong front
with +- 4000’ freezing levels enters the scene tomorrow night with more snow
and rain.
The Long Range: Several
storms are lined up to impact the PNW through the weekend. The storm
track gradually shifts southerly progressively trending warmer. In other words, rain will be the main feature
on Friday and Saturday.
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Precipitation Ending at 4am:
Today 24hr water = 1-1.25 Snow = 5-10
Tomorrow’s 24hr water = .5 snow = 2-4
Trend and Timing:
Snow is expected to change to rain
this afternoon and then back to snow after 7 pm
tonight. The moisture shifts to
intermittent showers tomorrow.
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24hr temperature
ending at 4 am tomorrow:
Low: 30 High:
38
Freezing level: 4000’ - 6000’ – 4000’
Trend and Timing:
Freezing levels spike to 6000’ today
and then fall to 4000’ after 7 pm
tonight.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-5 E shifting W
Ridge Top: 0-10
SSE shifting SW
Trend and Timing:
The wind will shift to SW then W this
afternoon. Watch for high post frontal
winds tonight and early tomorrow morning.
Models have 50knot winds peaking between 2 am and 4 am tomorrow
morning and then diminishing through the day.
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jM
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