334
FXUS65 KBOI 020610
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1210 AM MDT THU APR 2 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- MODERATE TO HEAVY RAIN AND MOUNTAIN SNOW TONIGHT, WITH MINOR
ACCUMULATIONS OF WET SNOW ABOVE 5000 FT.
- STRONG COLD FRONT THIS EVENING IN EASTERN OREGON AND LATE
TONIGHT IN WESTERN IDAHO, WITH A NARROW BAND OF HEAVY SHOWERS
AND SCATTERED THUNDERSTORMS ALONG THE FRONT.
- VERY WINDY WITH WESTERLY GUSTS UP TO 45 MPH IN THE CAMAS
PRAIRIE AND WESTERN MAGIC VALLEY THURSDAY.
SHORT TERM /THROUGH SATURDAY NIGHT/
ISSUED 147 PM MDT WED APR 1 2026
AREAS OF MODERATE TO HEAVY RAIN AND MOUNTAIN SNOW, AND ISOLATED
THUNDERSTORMS, THE REST OF TODAY AND THIS EVENING AHEAD OF A
STRONG PACIFIC COLD FRONT MOVING INLAND. HI-RES MODELS DEPICT THE
COLD FRONT CLEARLY AS IT PASSES THROUGH OUR CWA TONIGHT, CROSSING
THE OR/ID BORDER AROUND MIDNIGHT MDT, THROUGH THE BOISE METRO 1-2
AM MDT THURSDAY, AND JEROME/TWIN FALLS 4-5 AM THURSDAY. THE FRONT
WILL BRING AN ABRUPT WIND SHIFT FROM SOUTHEAST TO WEST/NORTHWEST,
WITH ABOUT AN HOUR OF HEAVY SHOWERS AND SCATTERED THUNDERSTORMS.
COLD AIR BEHIND THE FRONT WILL LOWER THE SNOW LEVEL TO VALLEY
FLOORS, WITH RAIN LIKELY CHANGING TO WET SNOW BEFORE ENDING IN THE
UPPER TREASURE VALLEY, BUT ACCUMULATING AROUND AN INCH IN THE
MAGIC VALLEY. OVERNIGHT PCPN IN THE SNAKE BASIN SHOULD TOTAL .25
TO .50 INCH, WITH HEAVIER AMOUNTS IN THE IDAHO MOUNTAINS NORTH OF
THE SNAKE BASIN. PRE-FRONTAL RAIN MAY BE HEAVY ENOUGH TO BRING
ROCKS AND MUD DOWN STEEP TERRAIN ONTO ROADS LIKE THE BANKS-LOWMAN
ROAD. PERSONS SHOULD ROADS BELOW STEEP TERRAIN UNTIL PCPN
DECREASES THURSDAY MORNING. TOTAL PCPN (WATER EQUIVALENT) TONIGHT
THROUGH THURSDAY MORNING SHOULD BE 0.75 TO 1.50 INCH IN THE
MOUNTAINS, INCLUDING 3 TO 6 INCHES OF SNOW, BUT LOCALLY UP TO 15
INCHES ON THE HIGHER PEAKS. POST-FRONTAL WEST WINDS WILL INCREASE
TO 45 MPH IN THE WESTERN MAGIC VALLEY AND CAMAS PRAIRIE THURSDAY
MORNING AND CONTINUE ALL DAY. A WIND ADVISORY IS IN EFFECT THERE
FROM 9 AM MDT THURSDAY TO 9 PM MDT. CLEARING SKIES AND DECREASING
WINDS WILL ALLOW COLD NIGHTTIME LOW TEMPS THURSDAY NIGHT AND
FRIDAY NIGHT. FRIDAY WILL BE MOSTLY SUNNY AND ABOUT 10 DEGREES
WARMER THAN THURSDAY.
LONG TERM /SUNDAY THROUGH THURSDAY/
ISSUED 147 PM MDT WED APR 1 2026
GUIDANCE REMAINS IN GOOD AGREEMENT THAT HIGH PRESSURE SATURDAY
THROUGH TUESDAY WILL BRING A WARMING AND DRYING TREND.
TEMPERATURES 5-10 DEGREES ABOVE NORMAL THIS WEEKEND REACH
10-15 DEGREES ABOVE NORMAL BY EARLY NEXT WEEK. AFTERNOON HIGHS
IN LOWER ELEVATIONS WILL BE IN THE LOWER 70S MONDAY AND TUESDAY.
LIGHT WINDS AND CLEAR SKIES PERSIST IN THIS PERIOD. WEDNESDAY A
WEAK UPPER LEVEL LOW MOVES THROUGH, BRINGING SLIGHTLY COOLER
TEMPERATURES AND WETTER WEATHER. MODEL SOLUTIONS WIDELY VARY ON
THE STRENGTH OF THE LOW, BUT EVEN THE STRONGEST 10% OF SOLUTIONS
BRING ONLY LIGHT RAIN SHOWERS AND 20-30 MPH GUSTS.
AVIATION /06Z THURSDAY THROUGH FRIDAY/
ISSUED 1206 AM MDT THU APR 2 2026
A STRONG COLD FRONTAL PASSAGE WILL BRING MODERATE RAIN/SNOW SHOWERS
AND GUSTY W-NW WINDS OVERNIGHT. MVFR-IFR CONDITIONS IN HEAVIER
SHOWERS. IFR-LIFR CONDITIONS OVER MOUNTAINS THROUGH EARLY MORNING.
MOUNTAINS OBSCURED. SNOW LEVELS WILL FALL QUICKLY TO VALLEY FLOORS
BEHIND THE FRONT. SNOW SHOWERS POSSIBLE OVER ALL SITES OVERNIGHT
THROUGH MORNING. SURFACE WINDS: SW-SE 5-15 KT, SHIFTING W-NW 10-15
KT WITH GUSTS TO 30 KT ALONG THE FRONT AFTER 08Z. WINDS ALOFT AT
10KFT MSL: SW 25-40 KT THEN W-NW 40-50 KT AFTER 12Z.
KBOI...LOW VFR WITH SHOWERS CONTINUING THROUGH THE NIGHT. A STRONG
COLD FRONT PASSAGE OVERNIGHT WILL BRING RAIN/SNOW SHOWERS AND W-NW
WINDS 10-15 KT WITH GUSTS 25-30 KT.
WEEKEND OUTLOOK...A HIGH PRESSURE SYSTEM WILL BRING A DRY AND
CLEAR WEEKEND, WITH WINDS SW-SE UNDER 10 KT THROUGH
SATURDAY/SUNDAY. PATCHY FOG POSSIBLE IN SHELTERED MOUNTAIN
VALLEYS SATURDAY MORNING.
BOI WATCHES/WARNINGS/ADVISORIES
ID...WIND ADVISORY FROM 9 AM THIS MORNING TO 9 PM MDT THIS EVENING
FOR IDZ016-028-030.
OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....JY
SHORT TERM...LC
LONG TERM....JM
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