800
NZUS99 KBOI 311643
TXTSFD
IDAHO STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
943 AM MST WED DEC 31 2025
HIGH PRESSURE REMAINS OVER THE REGION MAINTAINING STRONG VALLEY INVERSIONS AND
STAGNANT AIR ACROSS THE STATE. A TRANSITION TO A MORE ACTIVE WEATHER PATTERN
BEGINS IN THE AFTERNOON ON JANUARY 1ST AS A WARM FRONT MOVES NORTHWARD BRINGING
RAIN TO MUCH OF SOUTHERN IDAHO AND A WINTERY MIX TO NORTHERN AND CENTRAL
IDAHO. SNOW LEVELS WILL RISE SIGNIFICANTLY ON FRIDAY, REACHING 6000 TO 8000
FEET IN SOUTHERN IDAHO AND 3500 TO 5000 FEET IN THE IDAHO PANHANDLE, LEADING TO
A TRANSITION TO RAIN FOR MOST POPULATED AREAS. GUSTY WINDS ARE EXPECTED TO
DEVELOP FRIDAY INTO SATURDAY, ESPECIALLY ACROSS SOUTHERN AND CENTRAL IDAHO, AS
A STRONGER PACIFIC SYSTEM APPROACHES THE COAST. THIS UNSETTLED PATTERN WILL
PERSIST THOUGH EARLY NEXT WEEK WITH PERIODS OF RAIN AND MOUNTAIN SNOW, WHILE
TEMPERATURES GENERALLY TREND 5 TO 10 DEGREES ABOVE SEASONAL NORMALS.
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