April 23, 2016

MOUNTAIN WEATHER FORECAST

Time and Day: 0700 Saturday

The Snapshot:   Breezy, cooler temperatures with light passing rain showers and sun break today; mixed rain and snow tonight with a drying trend beginning tomorrow. 

The Science: Satellite imagery shows spotty showers with patchy clouds over the Cascades this morning.  Some upper-level ridging will provide some clear periods between the showers for most of today.   This ridging will also play a part in keeping the bulk of the moisture west of the crest tomorrow.   Therefore, expect the weekend to have a mixed bag of sun, rain, and snow.  Fitting for the final weekend of the season. 

The Long Range:  Next week will be mostly dry with cooler temperatures.  

P.S. This will be the last official Mountain Weather Forecast for the season.  Have a great summer everyone.

Precipitation Ending at 4am:

Today 24hr water = .25-.5  Snow = 0-2

Tomorrow’s 24hr water = .25 snow = trace

Trend and Timing:
Rain showers today with mixed rain and snow tonight, partial clearing and drying tomorrow.


24hr temperature ending at 4 am tomorrow: 
                                     
Low:  30   High: 40
Freezing level: 6000’  4500’

Trend and Timing:   
Temperatures will climb to near 40 today with freezing temperatures likely early tomorrow morning.   

 
24hr Winds (mph) ending at 4 am tomorrow:
Base:  5-10 W
Ridge Top: 5-15 W

Trend and Timing:
Gusty westerly winds will continue through the next 24 hrs.




jM

April 22, 2016

MOUNTAIN WEATHER FORECAST

Time and Day: 1000 Friday

The Snapshot:   Cooler with periodic rain showers today and tomorrow; mixed rain and snow for Sunday.

The Science:  A low-pressure system off the coast of Oregon will spin bands of showers north today and tomorrow.  Cooler air aloft will also begin to invade, gradually lowering freezing levels through the weekend.  A cold front will bring more steady mixed precipitation and cooler temperatures on Sunday. 

The Long Range:  Next week will start out partly cloudy, dry and cold with some light rain showers expected towards the end of the week.

Precipitation Ending at 4am:

Today 24hr water =  .25 Snow = 0

Tomorrow’s 24hr water = .25-.5  snow =

Trend and Timing:
Light rain showers today and tomorrow. 


24hr temperature ending at 4 am tomorrow: 
                                     
Low:  34   High: 52
Freezing level: 9000’ – 5500.'

Trend and Timing:   
Freezing levels will fall to around 5000’ by early tomorrow morning and then continue to fall to 4000’ on Sunday.
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24hr Winds (mph) ending at 4 am tomorrow:
Base: 0-10 WNW
Ridge Top: 5-10 WNW

Trend and Timing:
Winds begin to strengthen tomorrow with gusty ridge top winds expected tomorrow night into Sunday morning.




jM

April 21, 2016

MOUNTAIN WEATHER FORECAST

Time and Day:  0800 Thursday

The Snapshot:  Clouds roll in today with a chance of light rain and possibly a thunderstorm or two.  Cooler with rain starting tomorrow and lasting through the weekend.  

The Science:  Surface temperatures peaked around 650 yesterday and should climb into the 600 again today.   A cold unstable air mass begins to push in tomorrow with rain showers developing through the weekend. With the cool, moist air hitting the warm, dry air, cumulus build up with thunderstorms will be possible.

Rain showers begin tomorrow and will last through Saturday. More steady light rain can be expected on Sunday.  It doesn’t appear that temperatures will not be low enough to get any snow accumulation, but there could certainly be some snow mixed in.

The Long Range:   Next week will be cooler with periodic rain showers throughout.  

Precipitation Ending at 4am:

Today 24hr water = .10 Snow = 0

Tomorrow’s 24hr water = .25 snow = 0

Trend and Timing:
Rain showers tomorrow and Saturday. 


24hr temperature ending at 4 am tomorrow: 
                                     
Low:  36   High: 62
Freezing level: +- 10,000’ – 7000’

Trend and Timing:   
Temperatures will begin to fall tomorrow with freezing levels dropping to  +- 5000’ on Saturday morning.

 
24hr Winds (mph) ending at 4 am tomorrow:
Base: 0- 5 W
Ridge Top: 0-5  W
Trend and Timing:
 Light easterly flow with shift westerly today.




jM