059
FWUS45 KMSO 171057
SAGMSO
BACKCOUNTRY FORECAST FOR WESTERN MONTANA AND NORTH CENTRAL IDAHO
NATIONAL WEATHER SERVICE MISSOULA MT
357 AM MST SUN FEB 17 2019
DISCUSSION: A MOISTURE STARVED MODIFIED ARCTIC COLD FRONT HAS
PROGRESSED WELL INTO MONTANA OVERNIGHT. THUS SNOWFALL HAS BEEN
MORE LIMITED AND RATHER LOCALIZED WITH THE MISSION, SWAN AND
FLATHEAD RANGES LIKELY RECEIVING THE LIONS SHARE OF MOUNTAIN
ACCUMULATIONS. HOWEVER THE GUSTY EAST WINDS HAVE ALSO
MATERIALIZED IN FULL FORCE THROUGHOUT THESE AREAS, LEADING TO
WIDESPREAD BLOWING AND DRIFTING OF SNOW ALONG WITH LIMITED
VISIBILITY THAT WILL CONTINUE WELL INTO TODAY.
THIS EVENING THE GREATEST THREAT THROUGHOUT THE BACKCOUNTRY WILL
TRANSITION TO COLD TEMPERATURES AND DANGEROUSLY COLD WIND CHILL
READINGS. DECREASING CLOUDS AND WINDS GRADUALLY CALMING DOWN ARE
BOTH EXPECTED MONDAY WHICH WILL LEAD TO A PERIOD OF OPTIMAL
RADIATIONAL COOLING AND EXTREMELY COLD LOW TEMPERATURES ON
TUESDAY MORNING.
ELEVATIONS ABOVE 4,000 FT:
TODAY TONIGHT MON
CLOUD COVER 85% 65% 35%
HI/LO TEMPS 4 TO 22 -23 TO 2 7 TO 18
WINDS(MPH) NE 17G40 NE 15G31 NE 7G21
PRECIP CHC 50 10 0
PRECIP TYPE SNOW SNOW SNO/SHR
LIQUID AMT 0.03 0.01 0.00
SNOW RATIO(SLR) 20:1 20:1 20:1
SNOW AMT(IN) 0-2 0-2 0
SNOW LEVEL 0 0 0
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