Time and Day: 0900 Monday

The Snapshot: Thickening clouds and colder with very light snow today; mixed rain and snow tomorrow.

 

The Science:  As expected, the high pressure ridge has weakened and shifted east.  This has opened the door for a low pressure system to reach the region.   Radar shows a stratus layer of clouds with light scattered snow showers entering the mountains this morning.  A strong temperature gradient divided by the Cascade Crest will build strong easterly flow through tomorrow.  A warm front followed by a cold front will create a mixed rain and snow event tomorrow with snow on Wednesday.   

 

4-7day Long Range:  The week will trend colder and dryer under developing northerly flow. 

Precipitation: Water by 4am = .10  Snow = 0-1 24hr total inches of water ending at noon tomorrow = <.25 24hr total inches of snow ending at noon tomorrow = 1-3   Trend and Timing: Light snow showers expected through the night with little accumulation.  Snow changing to mixed rain and snow tomorrow afternoon.

Base Temp and Freezing levels:  Low:  22   High: 26 Freezing level: 2500’    3500’   Trends and Timing Freezing levels are +- 2000’ east of the summit and +- 4000’ along the western slopes.  Freezing levels rise to 5000’ by tomorrow night.

Winds (mph) Base: 5-10 E Ridge Top: 5-15 ESE   Trend and Timing: Strong easterly winds this morning will weaken later today.  East flow will continue through tomorrow and shift westerly early Wednesday.