158
FWUS45 KMSO 221104
SAGMSO
BACKCOUNTRY FORECAST FOR WESTERN MONTANA AND NORTH CENTRAL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
404 AM MST TUE JAN 22 2019
DISCUSSION: A PRETTY BORING, FEATURELESS DAY IS IN STORE TODAY,
WEATHER-WISE. THIS WILL CHANGE COME TONIGHT, AS AMPLE MOISTURE
MOVES IN FROM THE WEST AND BRINGS ANOTHER ROUND OF MODERATE TO
HEAVY MOUNTAIN SNOWFALL THROUGH THE DAY WEDNESDAY. ACCOMPANYING
THE MOISTURE WILL BE STRONG UPPER LEVEL FLOW THAT WILL KEEP WINDS
CRANKING IN THE RIDGETOPS. NORTHWEST MONTANA MOUNTAIN RANGES WILL
SEE LITTLE IN THE WAY OF SNOW LEVEL FLUCTUATIONS, HOWEVER WEST
CENTRAL MONTANA AND CENTRAL IDAHO WILL HAVE TO DEAL WITH WAVERING
SNOW LEVELS AS THEY CREEP INTO THE 4500-5500 FEET RANGE WEDNESDAY
AFTERNOON AND EVENING. THIS MAY RESULT IN A RAIN/SNOW MIX OR VERY
WET, HEAVY SNOWFALL FOR MIDSLOPES IN THE BITTERROOTS,
RATTLESNAKE, AND CLEARWATER MOUNTAINS. A COLD FRONT IS EXPECTED
WEDNESDAY NIGHT/THURSDAY MORNING, WHICH WILL PUSH SNOW LEVELS BACK
DOWN TO VALLEY FLOORS.
THURSDAY, EXPECT LIGHT TO MODERATE - BUT STILL VERY PERSISTENT -
SNOW TO CONTINUE ACROSS THE REGION UNDER MOIST NORTH TO
NORTHWESTERLY FLOW.
ELEVATIONS ABOVE 4,000 FT:
TODAY TONIGHT WED
CLOUD COVER 75% 90% 95%
HI/LO TEMPS 21 TO 29 17 TO 24 25 TO 35
WINDS(MPH) SW 17G43 SW 18G41 W 14G45
PRECIP CHC 50 100 100
PRECIP TYPE SNO/SHR SNOW SNOW
LIQUID AMT 0.05 0.28 0.40
SNOW RATIO(SLR) 19:1 17:1 17:1
SNOW AMT(IN) 0-3 4-9 6-10
SNOW LEVEL 500 2000 2500
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