832
FXUS65 KBOI 241154
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
554 AM MDT FRI APR 24 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- LIGHT MOUNTAIN SNOW SHOWERS AND BREEZY WINDS TODAY.
- WIDESPREAD FROST AND AREAS OF FREEZING TEMPERATURES LATE
TONIGHT INTO SATURDAY MORNING.
- REMAINING UNSETTLED THROUGH THE WEEKEND AND INTO EARLY NEXT
WEEK. TEMPERATURES WILL GRADUALLY WARM TOWARD NORMAL BY MID
WEEK.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED 238 AM MDT FRI APR 24 2026
AN UPPER LOW WILL REMAIN OVER THE NORTHERN PLAINS / SOUTHERN
CANADA THROUGH THE SHORT TERM. A WEAK SHORTWAVE TROUGH WILL
DIVE DOWN THE BACKSIDE OF THE LOW TODAY AND CLIP THE NORTHERN
PART OF OUR AREA. THIS WILL PRODUCE SCATTERED SNOW SHOWERS
ACROSS THE WEST-CENTRAL IDAHO MOUNTAINS WITH DRY CONDITIONS
ELSEWHERE. DESPITE SNOW LEVELS ON MOUNTAIN VALLEY FLOORS, ANY
ACCUMULATIONS WILL BE MINIMAL. HIGHS TODAY WILL BE 5-10 DEGREES
BELOW NORMAL. WINDS WILL BE BREEZY THIS AFTERNOON ACROSS
SOUTHERN IDAHO WITH GUSTS 20-35 MPH. WITH A COOL AIRMASS IN
PLACE, LIGHT WINDS, AND MOSTLY CLEAR SKIES, TEMPERATURES WILL
DIP TO NEAR OR BELOW FREEZING TONIGHT IN AGRICULTURAL VALLEYS.
A FREEZE WATCH REMAINS IN EFFECT FOR THESE AREAS.
ADDITIONAL SHORTWAVE ENERGY DROPPING DOWN THE BACKSIDE OF THE
LOW WILL MERGE WITH A BROAD UPPER LEVEL TROUGH OVER CALIFORNIA
OVER THE WEEKEND. THE RESULTANT BROAD TROUGH OVER THE PACIFIC
NORTHWEST WILL KEEP TEMPERATURES COOL WITH A 20-50% CHANCE OF
SHOWERS OVER THE HIGHER TERRAIN ALONG WITH A 10% CHANCE OF
THUNDERSTORMS EACH AFTERNOON. SNOW LEVELS WILL BE 4000-5500
FEET, WITH MINOR ACCUMULATIONS POSSIBLE ON HIGHER PEAKS. WINDS
WILL BE LIGHTER ON SATURDAY, THEN BREEZY AGAIN SUNDAY AS SURFACE
LOW PRESSURE MOVES OVER EASTERN IDAHO. AREAS OF FROST WILL
DEVELOP SATURDAY AND SUNDAY NIGHTS, BUT LOWS SHOULD NOT BE AS
COLD AS TONIGHT.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED 238 AM MDT FRI APR 24 2026
A BROAD UPPER LEVEL TROUGH WILL REMAIN OVER THE PACIFIC
NORTHWEST ON MONDAY AND TUESDAY, FOLLOWED BY UPPER LEVEL RIDGING
WEDNESDAY THROUGH FRIDAY. A 20-50% CHANCE OF SHOWERS, HIGHEST
CHANCE OVER THE MOUNTAINS, AND A 10% CHANCE OF THUNDERSTORMS
WILL CONTINUE ON MONDAY. PRECIPITATION CHANCES WILL BEGIN TO
TREND LOWER TUESDAY, THEN SETTLE AT AROUND 20% OVER THE
MOUNTAINS EACH AFTERNOON LATE WEEK WITH LOWER CHANCES ELSEWHERE.
RIDGING WILL BRING WARMER TEMPERATURES, INCREASING TO NEAR OR
SLIGHTLY ABOVE NORMAL BY MID TO LATE WEEK. WINDS WILL BE LIGHTER
UNDER THIS PATTERN.
AVIATION /12Z FRIDAY THROUGH SATURDAY/
ISSUED 544 AM MDT FRI APR 24 2026
MAINLY VFR. SCATTERED SNOW SHOWERS TODAY OVER THE WEST-CENTRAL
ID MTNS, MAINLY EAST OF KMYL. BRIEF MVFR/IFR CONDITIONS AND
MOUNTAIN OBSCURATION IN SNOW SHOWERS. SURFACE WINDS: NW-N 10-20
KT, GUSTS TO 30 KT KMUO EAST TO THE MAGIC VALLEY TERMINALS.
WINDS ALOFT AT 10KFT MSL: NW-N 15-30 KT.
KBOI...VFR. SURFACE WINDS: NW 10-15 KT WITH GUSTS UP TO 25 KT.
WEEKEND OUTLOOK...GENERALLY VFR. SCATTERED SHOWERS DEVELOPING
OVER THE HIGHER TERRAIN EACH AFTERNOON. BRIEF MVFR/IFR CONDITIONS
AND MOUNTAIN OBSCURATION IN SHOWERS. ISOLATED RAIN SHOWERS OVER
THE VALLEYS. SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS NEAR THE NV
BORDER. SNOW LEVELS 4-6KFT MSL. SURFACE WINDS: VARIABLE 10 KT
OR LESS SATURDAY, W-NW 5-15 KT SUNDAY WITH GUSTS TO 25 KT KMUO
EAST TO THE MAGIC VALLEY TERMINALS.
BOI WATCHES/WARNINGS/ADVISORIES
ID...FREEZE WATCH FROM LATE TONIGHT THROUGH SATURDAY MORNING FOR
IDZ012-014-016.
OR...FREEZE WATCH FROM LATE TONIGHT THROUGH SATURDAY MORNING FOR
ORZ064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....ST
SHORT TERM...ST
LONG TERM....ST
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