Time and Day: 0700
Friday
The Snapshot: Continued dry but a bit warmer today. An active weather pattern begins tomorrow
night and lasts through the middle of next
week.
The Science: High cirrus
clouds will begin to move in later today in response to the developing change. Warmer air aloft will override and trap the cold surface
air in the eastern basin; this will force east flow to redevelop later today
with an inverted temperature profile. (warmer air above with cold air mixing at the
surface)
The low-pressure system strengthening off the NW
coast is expected to spin several frontal bands into the PNW starting tomorrow
night. Snow with east flow holding freezing
levels low will show up tomorrow afternoon.
Just a few inches of snow is likely tomorrow night into Sunday morning.
The main event
happens on Sunday with a strong warm front driving up from the SW. This will bring heavy precipitation and
rising freezing levels to the region. Details
of this event are still in question, but snow with a mixture of rain or
freezing rain will be part of the conversation for Sunday.
The Long Range: Cooler with snow showers will be on the
docket for the first half of next week.
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Precipitation
Ending at 4am:
Today 24hr water = 0 Snow = 0
Tomorrow’s 24hr water
= .25 snow = 2-4
Trend and Timing:
Light snow begins late
tomorrow afternoon.
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24hr temperature ending at 4 am tomorrow:
Low: 14 High:
22
Freezing level: +-2500’
Trend and Timing:
East flow will hold
surface temperature below freezing into early Sunday morning.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 5-10 E
Ridge Top: 5-15 E
Trend and Timing:
Westerly winds this
morning will shift easterly later today.
East flow will strengthen tomorrow and shift southerly on Sunday.
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jM
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