869
NZUS99 KBOI 261213
TXTSFD
IDAHO STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
513 AM MST FRI DEC 26 2025
A POTENT PACIFIC COLD FRONT IS SWEEPING ACROSS IDAHO TODAY, BRINGING A RETURN
TO ACTIVE WINTER WEATHER CHARACTERIZED BY GUSTY WINDS AND WIDESPREAD
PRECIPITATION THAT WILL TRANSITION FROM RAIN TO SNOW AS SNOW LEVELS CRASH TO
VALLEY FLOORS ACROSS MUCH OF THE CENTRAL AND NORTHERN PANHANDLE BY THIS
EVENING. WINTER DRIVING CONDITIONS ARE EXPECTED ON MOUNTAIN PASSES STATEWIDE,
PARTICULARLY LOOKOUT AND LOLO PASSES, WHILE THE SNAKE RIVER PLAIN AND SOUTHWEST
VALLEYS WILL SEE GUSTY WINDS AND A MIX OF RAIN AND WET SNOW. AS THE TROUGH
EXITS TO THE EAST ON SATURDAY, PRECIPITATION WILL TAPER OFF, PAVING THE WAY FOR
A STRONG HIGH PRESSURE RIDGE TO BUILD OVER THE REGION STARTING SUNDAY. THIS
SHIFT IN THE PATTERN WILL REINTRODUCE STABLE CONDITIONS FOR THE FIRST HALF OF
NEXT WEEK, TRAPPING COLD AIR IN THE VALLEYS AND LIKELY LEADING TO PERSISTENT
INVERSIONS, AREAS OF DENSE FOG, AND LOW STRATUS CLOUDS IN THE SNAKE PLAIN AND
SHELTERED VALLEYS WHILE MOUNTAIN ELEVATIONS EXPERIENCE SUNNIER AND MILDER
CONDITIONS.
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