569
NZUS99 KBOI 220421
TXTSFD
IDAHO STATE FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
921 PM MST SUN DEC 21 2025
WET AND WINDY WEATHER CONTINUES THROUGH THE MIDDLE OF THE WEEK AS MOIST ZONAL
FLOW CONTINUES TO DRIVE THE OVERALL PATTERN WITH MULTIPLE WEATHER SYSTEMS.
WARM AIR FROM THE SOUTHWEST WILL CONTINUE TO BRING WIDESPREAD VALLEY RAIN AND
MOUNTAIN SNOW THROUGH MONDAY. SIGNIFICANT MOUNTAIN SNOW ACCUMULATION IS LIKELY
THROUGH TUESDAY, WITH MULTIPLE INCHES OF RAINFALL/LIQUID EQUIVALENT AND
MULTIPLE FEET OF SNOW FOR RIDGES AND PASSES. LOWER ELEVATIONS COULD SEE
LOCALIZED FLOODING AND ROCK SLIDE CONCERNS IN STEEP DRAINAGES. SNOW LEVELS
FLUCTUATE BETWEEN 3-5 KFT MSL AND 6-8 KFT MSL AS MULTIPLE FRONTS PASS THROUGH,
BUT REMAIN LOWER TO THE NORTH AND HIGHER TO THE SOUTH.
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