Time and Day: 0630
Tuesday
The Snapshot: This cold, clear and breezy weather will
continue for most of the remaining week. A change to warmer and wetter weather is expected to begin over the
weekend.
The Science: Temperatures will climb to a balmy 12-150
today as the cold air mass settles in.
Gusty ridge top and down slope (western slopes) winds will strengthen
today as pressure gradients tighten over the next 12-24hrs. This cold
air is a result of what is known as the Frazer River outflow effect: Cold arctic air streaming into eastern
Washington from the Canadian Frazer River valley. Low pressure to the south and the high
pressure stuck in Gulf of Alaska is responsible for the increased pressure
gradients and thus the breezy gap winds.
The end of the
week will be slightly warmer and less windy as the gradients ease and warmer
marine air tries to make its way into the mix.
The Long Range: A change to warmer and wetter weather begins
over the weekend with the next winter storm developing off of NW coast.
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Precipitation
Ending at 4am:
Today 24hr water = 0 Snow
= 0
Tomorrow’s 24hr water
= 0 snow = 0
Trend and Timing:
No precip expected for
the remainder of the week.
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24hr temperature ending at 4 am tomorrow:
Low: 0 High:
15
Freezing level: Sea
Level
Trend and Timing:
Cold temperatures will
continue through tomorrow with gradual warming heading into the weekend.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 5-10 E
Ridge Top: 10-20 E
Trend and Timing:
East/offshore winds
will increase today with gust +25mph gust on the upper ridges likely.
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jM
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