1/4/2011 Weather
24HR SNAPSHOT starting at NOON today
Water- .25 -.5 Snow 3-6
Freezing levels - 2000' rising to 4500'
Winds - 5-15 WSW
General Discussion: A warm front approaching the coast will bring warmer air and moisture to the PNW tonight and tomorrow. Snow and rain with snow showers on the tail end of the storm will all be possible during the next few days.
Long-term: A cold front will arrive late Thursday night which will bring cooler air and tapering precipitation on Friday. The weekend looks dry as of now.
TRENDS AND TIMING
Precipitation: Snow is expected to develop after 4pm today. Snow will fall through the night and change to rain/snow mix below 5000’ and possible all rain at Pass level during the day tomorrow. With cool air still trapped in the eastern basin, snow amounts will depend on when, and at what elevation, the warm air mixes.
Freezing levels: The upper atmosphere will begin to warm up today as warm SW air overrides the cooler air to the east. Freezing levels will reach pass level mid day tomorrow and continue to rise to 5000’ through the day.
Winds: Winds will shift westerly and strengthen through the next 24hrs Strong ridge top winds will ramp up tomorrow evening.
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