Winter Storm Warnings and Advisories in much of the western US. Windchill advisories in North Dakota and Minnesota with values down to -30 F/-34 C.
NWS Rapid City, South Dakota:
...SNOW AND ARCTIC AIR ON THE WAY...
.AN ARCTIC COLD FRONT WILL SLIDE SOUTH ACROSS THE AREA TODAY...WITH
TEMPERATURES DROPPING THIS AFTERNOON. AN UPPER LEVEL SYSTEM WILL
CROSS THE REGION THIS AFTERNOON THROUGH EARLY MONDAY...BRINGING
WIDESPREAD SNOWFALL. SNOWFALL AMOUNTS OF 2 TO 4 INCHES ARE
EXPECTED ACROSS THE ADVISORY AREA BY LATE MONDAY MORNING.
TEMPERATURES WILL DROP TO NEAR OR BELOW ZERO MONDAY MORNING...WITH
WIND CHILL VALUES OF 5 BELOW TO 20 BELOW ZERO LATE TONIGHT AND
MONDAY MORNING.
NWS Missoula, Montana:
A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST /10 PM
PST/ THIS EVENING.
* IMPACTS/TIMING: SNOW WITH MODERATE TO HEAVY RATES OF 1 TO 2
INCHES OR MORE PER HOUR WILL CONTINUE THROUGH THIS MORNING.
TRAVEL WILL BE DANGEROUS AT TIMES DUE TO SLICK SNOW COVERED
ROADS...PERIODS OF HEAVY SNOW...AND REDUCED VISIBILITY.
* SNOW ACCUMULATIONS: 4 TO 8 INCHES IN THE VALLEYS... 10 TO 15
INCHES IN THE HIGHER TERRAIN AND OVER LOLO AND LOST TRAIL
PASSES. AMOUNTS COULD BE LOCALLY HIGHER.
NWS Pocatello, Idaho:
A WINTER STORM WARNING FOR MODERATE TO HEAVY SNOW AND BLOWING SNOW REMAINS
IN EFFECT UNTIL 5 PM MST THIS AFTERNOON.
* TIMING...THROUGH THIS AFTERNOON.
* SNOWFALL...AN ADDITIONAL 2 TO 4 INCHES IN THE MOUNTAINS FROM
NEAR GALENA SUMMIT THROUGH THE STANLEY AREA. THE REST OF THE
WARNING AREA WILL SEE UP TO 2 INCHES.
* IMPACTS...SNOW AND GUSTY WINDS WILL CREATE HAZARDOUS
CONDITIONS AT TIMES ESPECIALLY OVER PASSES AND THROUGH HIGHER
ELEVATION AREAS. PREVIOUS HEAVY SNOWFALL FROM THE CHRISTMAS
STORM WILL INCREASE THE LIKELIHOOD OF BLOWING AND DRIFTING
SNOW AND LOW VISIBILITY.
NWS Grand Junction, Colorado:
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MST MONDAY...
* TIMING...LIGHT SNOW WILL DEVELOP THIS MORNING WITH THE GREATEST
ACCUMULATIONS EXPECTED TO OCCUR TONIGHT INTO MONDAY.
* SNOW ACCUMULATION...10 TO 16 INCHES.
* WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 35 MPH...BECOMING
NORTHEAST TO EAST ON MONDAY AND WEAKENING.
* IMPACTS...ACCUMULATING SNOW WILL IMPACT TRAVEL ACROSS THE
MOUNTAINS. AREAS OF BLOWING SNOW TODAY AND TONIGHT WILL REDUCE
VISIBILITY AT TIMES.