181
FXUS65 KBOI 192106
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
206 PM MST WED FEB 19 2025
SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT
RAIN AND SNOW ARE
FALLING IN THE REGION, WITH PERSISTENT COLD AIR LINGERING IN
LOW ELEVATION VALLEYS NEAR ONTARIO, OR KEEPING THE PREDOMINANT
PRECIPITATION TYPE TODAY AS SNOW. AS OF 1:30PM, ONTARIO AND
BURNS, OR HAS SWITCHED BACK TO RAIN. WITH PERIODS OF A RAIN-SNOW
MIX LIKELY THROUGH THE AFTERNOON. BREEZY SOUTHEAST WINDS ARE
ALLOWING FOR RAIN SHADOWING IN THE UPPER TREASURE VALLEY,
KEEPING BOISE-NAMPA MOSTLY DRY THIS AFTERNOON. RAIN AND
OVERNIGHT SNOW WILL CREEP BACK INTO THE METRO AREA AS THE WINDS
DIE DOWN THIS EVENING. SNOW WILL CONTINUE IN HIGHER ELEVATIONS
ABOVE ABOUT 4000 FEET, WITH A SWITCH TO RAIN AND GRAUPEL FOR
MOUNTAIN VALLEYS BELOW 4500-5500 FEET AS CONVECTIVE SHOWERS
MOVE IN BEHIND THE INITIAL WARM FRONT THIS EVENING. SNOW TOTALS
AROUND 2-4 INCHES WILL OCCUR BY TOMORROW MORNING FOR HIGHER
ELEVATION MOUNTAINS. THANKS TO THE DECREASING PRECIPITATION,
THE WINTER WEATHER ADVISORY WAS ALLOWED TO EXPIRE AT THIS
AFTERNOON, WITH IMPROVING CONDITIONS CONTINUING THROUGH THE
AFTERNOON AS THE SYSTEM EXITS TO OUR EAST. CLEARING OVERNIGHT
WILL ALLOW FOR PATCHY FOG TO FORM AS WELL, MAINLY IN SHELTERED
VALLEYS IN THE WEST CENTRAL AND BLUE MOUNTAINS. A FEW SNOW
SHOWERS WILL LINGER NEAR THE ID-NV BORDER AND OVER THE CENTRAL
ID MOUNTAINS OVERNIGHT INTO EARLY THURSDAY MORNING. BY THURSDAY
AFTERNOON, MOST OF THE PRECIPITATION WILL EXIT THE REGION, WITH
LIGHT NORTHEAST WINDS CONTINUING THROUGH FRIDAY MORNING. A WEAK
SYSTEM WILL BEGIN TO MOVE INTO HARNEY-BAKER COUNTY LATE FRIDAY
NIGHT, BRINGING WARMER TEMPERATURES AND RAIN BELOW ABOUT
4000-5000 FEET AND LIGHT SNOW TO HIGHER ELEVATIONS.
LONG TERM...SATURDAY THROUGH WEDNESDAY
GUIDANCE REMAINS
CONSISTENT WHICH RAISES CONFIDENCE THAT A MOIST PACIFIC PLUME WILL
BRING WIDESPREAD PRECIPITATION ACROSS OUR AREA LATE THIS WEEKEND,
MAINLY TARGETING THE NORTHERN TIER. PRELIMINARY PRECIP TOTALS OF
OVER AN INCH ARE DEPICTED IN THE HIGHER ELEVATIONS. SNOW LEVELS
APPEAR TO BE WELL ABOVE VALLEY FLOORS, LIMITING THE HEAVIER SNOWFALL
TO ELEVATIONS ABOVE 6000 FEET. AN UPPER TROUGH THEN MOVES THROUGH
LATE MONDAY THROUGH TUESDAY, ONCE AGAIN TAKING AIM ON OUR NORTHERN
AREAS (BAKER COUNTY AND CENTRAL IDAHO). SNOW LEVELS ARE LOWER, DOWN
TO AROUND 4000-5000 FEET - STILL WELL ABOVE LOWER VALLEYS. A HIGH-
AMPLITUDE UPPER RIDGE THEN FOLLOWS ON WEDNESDAY FOR DRY CONDITIONS.
THERE IS GOOD AGREEMENT AMONG THE ENSEMBLES THAT TEMPERATURES WILL
BE ABOVE NORMAL MONDAY THROUGH WEDNESDAY, WITH HIGHS IN THE 50S
ACROSS THE SOUTHERN VALLEYS - INCLUDING THE SNAKE PLAIN.
AVIATION
WIDESPREAD MVFR AND LOCAL IFR CONDITIONS IN RAIN AND
SNOW. MOUNTAINS OBSCURED. PRECIPITATION DIMINISHING FROM WEST TO
EAST OVERNIGHT. SNOW LEVELS 3500-5500 FEET MSL, LOWERING TO 3000-
4000 FEET MST BEHIND A COLD FRONT TONIGHT. SURFACE WINDS: GENERALLY
E TO S 5-15 KT WITH GUSTS TO 25 KT, SHIFTING TO THE W-NW TONIGHT.
WINDS ALOFT AT 10KFT MSL: W-SW 20-35 KT SHIFTING TO THE N-NW TONIGHT.
KBOI...VFR WITH OCCASIONAL MVFR CONDITIONS IN RAIN. RAIN MAY MIX
WITH SNOW THIS EVENING BEFORE ENDING BY THU/06Z. SURFACE WINDS: SE 5-
15 KT, GUSTING TO AROUND 20 KT, SHIFTING TO THE NW LESS THAN 10 KT
AFTER THU/02Z.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...SA
LONG TERM....BW
AVIATION.....BW
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