485
FXUS65 KPIH 020448
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1048 PM MDT WED APR 1 2026
KEY MESSAGES
- IMPACTFUL WINTER WEATHER: A WINTER WEATHER ADVISORY IS IN
EFFECT FOR THE CENTRAL MOUNTAINS AND EASTERN HIGHLANDS, WHERE
IMPACTFUL SNOW IS EXPECTED THROUGH TOMORROW.
- HIGH-ELEVATION SNOWFALL: ACCUMULATIONS OF 6 TO 10 INCHES ARE
PROBABLE FOR MOUNTAIN PASSES, WITH UP TO 1 TO 2 FEET POSSIBLE
ON THE HIGHEST PEAKS, PARTICULARLY IN THE SAWTOOTHS AND BEAR
RIVER RANGE.
- WINDY THURSDAY: A WIND ADVISORY IS IN EFFECT FOR THE SNAKE
PLAIN, MAGIC VALLEY, TETON VALLEY, AND SOUTH HILLS FOR GUSTS
UP TO 50 MPH.
- HOLIDAY WEEKEND WARM-UP: FOLLOWING A COLD AND WET THURSDAY, A
HIGH-PRESSURE RIDGE WILL USHER IN A SIGNIFICANT WARMING TREND,
WITH 70-DEGREE TEMPERATURES POSSIBLE BY EARLY NEXT WEEK.
DISCUSSION
ISSUED AT 222 PM MDT WED APR 1 2026
AFTERNOON SATELLITE IMAGERY REVEALS WELCOME BREAKS IN THE CLOUD
COVER, ALLOWING TEMPERATURES TO CLIMB INTO THE 50S IN AREAS
SEEING SUSTAINED SUNSHINE. THIS REPRIEVE WILL BE SHORT- LIVED,
HOWEVER, AS CLOUDS RETURN QUICKLY THIS EVENING AHEAD OF AN
APPROACHING UPPER-LEVEL LOW MOVING INLAND FROM THE PACIFIC
COAST. THIS FEATURE WILL SERVE AS THE PRIMARY DRIVER FOR A
PERIOD OF ACTIVE WEATHER ACROSS EASTERN IDAHO OVER THE NEXT 12
TO 36 HOURS.
AS THE SYSTEM MOVES OVERHEAD TOMORROW, A SHARP COLD FRONT WILL
PUSH THROUGH THE REGION DURING THE EARLY TO MID-MORNING HOURS.
HIGH-RESOLUTION GUIDANCE SUGGESTS THIS FRONT MAY COINCIDE WITH
THE MORNING COMMUTE ALONG THE INTERSTATE CORRIDORS, BRINGING A
RAPID TRANSITION FROM RAIN TO SNOW. WHILE OVERNIGHT RAINFALL
WILL SATURATE THE GROUND, THE ARRIVAL OF THE COLD FRONT WILL
DRIVE SNOW LEVELS DOWN TO VALLEY FLOORS. SIGNIFICANT VALLEY
ACCUMULATIONS APPEAR UNLIKELY DUE TO MARGINAL TEMPERATURES AND
WET ROADS, BUT A FEW TENTHS OF AN INCH REMAIN POSSIBLE,
ESPECIALLY IF CONVECTIVE ELEMENTS DEVELOP ALONG THE FRONTAL
BOUNDARY. BEHIND THE FRONT, TEMPERATURES WILL STRUGGLE, WITH
AFTERNOON HIGHS ONLY REACHING THE MID-30S TO LOWER 40S.
THE MOST SUBSTANTIAL IMPACTS WILL BE FOCUSED IN THE HIGH
COUNTRY, WHERE A WINTER WEATHER ADVISORY HAS BEEN ISSUED FOR THE
CENTRAL MOUNTAINS AND EASTERN HIGHLANDS. WHILE ELEVATIONS
AROUND 6,500 FEET—INCLUDING STANLEY, KETCHUM, AND ISLAND
PARK—CAN EXPECT 3 TO 6 INCHES OF SNOW, THE HEAVIEST TOTALS WILL
BE FOUND ABOVE 8,000 FEET. MOUNTAIN PASSES IN THE 6,500–8,500
FOOT RANGE ARE PROGGED TO RECEIVE 6 TO 10 INCHES, WHILE THE
HIGHEST PEAKS OF THE SAWTOOTHS COULD SEE 1 TO 2 FEET OF FRESH
ACCUMULATION DUE TO FAVORABLE UPSLOPE FLOW. COMPOUNDING THE
WINTER WEATHER WILL BE WIDESPREAD WINDS OF 25 TO 35 MPH, WITH
GUSTS POTENTIALLY REACHING 50 MPH ACROSS THE SNAKE PLAIN AND
SOUTH HILLS, MAKING FOR A GENERALLY UNPLEASANT DAY ACROSS THE
REGION.
THANKFULLY, THIS SYSTEM IS PROGRESSIVE. THE UPPER LOW IS
FORECAST TO SHIFT QUICKLY INTO WYOMING BY FRIDAY, ALLOWING
PRECIPITATION TO TAPER OFF AND SKIES TO BEGIN CLEARING. WHILE
FRIDAY REMAINS BELOW SEASONAL NORMS, IT WILL BE NOTABLY MILDER
THAN THURSDAY BEFORE A MORE ROBUST WARMING TREND TAKES HOLD FOR
THE WEEKEND. STRONG HIGH PRESSURE WILL DOMINATE THE
INTERMOUNTAIN WEST THROUGH EARLY NEXT WEEK, ENSURING DRY
CONDITIONS AND A RAPID CLIMB IN TEMPERATURES. VALLEY HIGHS IN
THE 60S THIS WEEKEND ARE EXPECTED TO GIVE WAY TO THE 70S BY
MONDAY AND TUESDAY. LOOKING FURTHER AHEAD, THE PATTERN MAY
BECOME UNSETTLED AGAIN BY MID-WEEK, THOUGH SIGNIFICANT
UNCERTAINTY REMAINS REGARDING THE TIMING AND STRENGTH OF ANY
SUBSEQUENT DISTURBANCES.
AVIATION /06Z TAFS THROUGH 06Z FRIDAY/
ISSUED AT 1039 PM MDT WED APR 1 2026
THUNDERSTORMS HAVE ENDED BUT SEVERAL WAVES OF SHOWERS WILL MOVE
THROUGH OVERNIGHT THROUGH 5 AM. DID DROP CEILINGS TO MVFR LEVELS
AS WELL IN THE 06 TO 09Z TIME FRAME. HAVE -SHRA AT ALL SITES
THROUGH 09Z. BIG FORECAST PROBLEM IS IF AND WHEN PRECIPITATION
CHANGES TO SNOW AFTER COLD FRONTAL PASSAGE. HAVE A MIX AT SUN
AFTER 09Z AND A MIX AFTER 13Z AT IDA AND PIH AND AT BYI AFTER
11Z. FOR DIJ CHANGED TO SNOW AFTER 12Z. DRY LOW LEVEL AIR DOES
MOVE IN QUICKLY POST COLD FRONT WHICH SHOULD END PRECIPIATION
PRETTY QUICKLY BEFORE 18Z AND ONLY LEFT PRECIPIATION IN AT DIJ.
HAVE SNOW BACK AT IDA AND DIJ AFTER 03Z THURSDAY NIGHT AS
CONVERGENCE ZONE IS POSSIBLE IN WRAP AROUND WAVE. ONLY HAVE
VCSH AT PIH. DROPPED VISIBILITY TO AS LOW AS 3 MILES IN THE SNOW
AND RAIN/SNOW MIX THURSDAY MORNING. OTHER BIG IMPACT WILL BE
WINDS AFTER 12Z WITH SUSTAINED 25 TO 30 KNOTS AT BYI, PIH AND
IDA WITH GUSTS 30 TO 40 KNOTS. GENERALLY 15 KNOTS AT SUN ANT DIJ
WITH GUSTS UP TO 25 KNOTS. OVERALL NOT A GOOD DAY ON THURSDAY
FOR GENERAL AVIATION.
PIH WATCHES/WARNINGS/ADVISORIES
WIND ADVISORY FROM 8 AM TO 9 PM MDT THURSDAY FOR IDZ051>057-
065.
WINTER WEATHER ADVISORY UNTIL NOON MDT FRIDAY FOR IDZ060-063-
064-066.
WINTER WEATHER ADVISORY UNTIL 6 PM MDT THURSDAY FOR IDZ071>074.
DISCUSSION...MCKAUGHAN
AVIATION...GK
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