November 3, 2017

MOUNTAIN WEATHER FORECAST

Time and Day: 0700 Friday

The Snapshot: The snow showers will linger in the mountains today and taper off tonight.  Tomorrow will start out cold and dry with a chance of light snow tomorrow night and Sunday.  More storms developing for the middle of next week.
    
The Science  

Current Observations: 6” of snow with .41” of water fell during the last 24hrs.      
It is 280f at the base and 23f on the upper ridge, the Rh is 91%, the barometer is 1005mb and steady, winds are light and out of the southeast. 

This mornings radar has fairly dry sky’s over the mountains with most of the moisture confined to the west.  The atmosphere will remain fairly unstable, so occasional snow showers through the weekend will be likely.

The featured topic for the weekend will be the early season cold snap.  Cold air flowing in through the Frazer River gap will bring freezing levels down to +- 1000’.   Sunday’s early morning low temperatures could hit the mid to lower teens and even possible single digits by Monday.  There is a system tracking across the southern portion of the state on Sunday but not much moisture is expected to reach Stevens Pass.

The Long Range:  Next week will start out cold, dry and partly clear.  A low-pressure cell tracking down the BC coast will bring warmer temperatures and moisture to the region starting on Wednesday.  This could be a nice snow producer for the Cascades so stays tuned at those details develop.     

24hr Precipitation ending at 4 am:
Today 24hr water: .25 snow: 1-3
Tomorrow’s 24hr water: lt.25   snow: 1-2

Trend and Timing:
Light snow showers will persist through Sunday. 


24hr temperature ending at 4 am: 
Low:18     High: 26
Freezing level: 4000’ – 1500’

Trend and Timing:   
Freezing levels will fall today and bottom out at 1000’ or lower on Sunday/Monday.

 
24hr Winds (mph) ending at 4am:
Base: 0-10 E
Ridge Top: 5-10 E

Trend and Timing:
East flow is expected to develop and strengthen today.



jM

No comments: