November 11, 2013

MOUNTAIN WEATHER FORECAST



Time: 1000
 

The Snapshot: Today will be mostly dry with a few sprinkles possible.  Rain tomorrow with freezing levels well above 5000’ can be anticipated. Dreary wet conditions will continue along the northern Cascade Crest through the middle of the week.      
 

The Science:  A rather large low pressure system tracking north into central BC is the cause of the wet warm weather.   The jet stream is extremely fragmented, making for an unorganized storm track, typical for this time of year. Cooler NW flow develops late Wednesday as high pressure develops off of the California / Oregon coast. This high pressure will likely cut off or push and significant moisture north into Canada over the weekend.         


4-7day Long Range: The week will end under cooler NW. Light rain or snow showers will continue to be possible through the weekend.   



 
24hr Accumulative Precipitation Totals Starting at Noon Today:
 
Water by 4am = lt .10  Snow equivalent = 0
 
Total inches of water by noon tomorrow = .25
Total inches of snow by noon tomorrow = 0
 
Trend and Timing:
Mostly dry conditions will prevail through the night. Light rain will begin early tomorrow and continue through the day.
 
 
 
24hr Base Area Temperatures (F) Starting at Noon Today: 
                                     
Low: 32     High: 45
Freezing level: 4000’     5500’
 
Trend and Timing:
Temperature will rise into the low to mid 40’s by tomorrow.
Freezing levels will remain at or above 5000’ through Wednesday.
 
 
 
24hr Winds Speed (mph)/Direction Starting at Noon Today:
 
Base: 0-5 E shifting SW
Ridge Top: 0-5 E shifting SW
 
 
Trend and Timing:
SW flow will eventually override the east flow tonight.  WSW winds will continue tomorrow.
 

 

 

 

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0800 Start Tues Jan 20th, no ABS