235
FXUS65 KPIH 192220
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
420 PM MDT TUE MAY 19 2026
KEY MESSAGES
- FROST AND FREEZE CONDITIONS CONTINUE AGAIN INTO WEDNESDAY
MORNING.
- GRADUAL WARMING TREND IS UNDERWAY THIS WEEK.
- BEST CHANCE FOR SHOWERS AND THUNDERSTORMS WEDNESDAY AND
THURSDAY AFTERNOONS.
DISCUSSION
ISSUED AT 134 PM MDT TUE MAY 19 2026
GENERAL "TROUGHINESS" REMAINS OVER EASTERN IDAHO TODAY, CONTINUING
OUR MILDLY UNSETTLED PATTERN. ANY PRECIPITATION CHANCES TODAY AND
FAIRLY LIMITED TO THE HIGHER ELEVATIONS FARTHER NORTH. AFTERNOON
WIND GUSTS WILL FALL INTO THE 20-25 MPH RANGE FOR MOST. LIGHT WINDS
AND PARTLY CLOUD CONDITIONS OVERNIGHT WILL KEEP US A FEW DEGREES
WARMER THAN THIS MORNING WAS, SO HAVE GONE WITH A FREEZE WARNING FOR
THE MUD LAKE/ARCO DESERT ZONE WHERE TEMPERATURES WILL BE BETWEEN 29
AND 32 DEGREES AND FROST ADVISORY FOR THE REST OF OUR SNAKE RIVER
PLAIN ZONES WHERE TEMPERATURES WILL BE BETWEEN 33 AND 37 DEGREES.
AFTER WEDNESDAY MORNING, WE MIGHT GET A BREAK FROM FROST/FREEZE
PRODUCTS ON THURSDAY MORNING, THOUGH THE MUD LAKE/ARCO DESERT ZONE
WILL BE CLOSE ONCE AGAIN. ONE SHORTWAVE MOVES OUT OF THE AREA ON
WEDNESDAY FOR A LOW TO DROP SOUTH OF OUT CANADA AND INTO NORTHERN
MONTANA LATE WEDNESDAY INTO THURSDAY. THE TROUGHING ASSOCIATED WITH
THAT LOW WILL IMPACT US LATE WEDNESDAY INTO THURSDAY, BRINGING AN
INCREASING CHANCE FOR SHOWERS AND THUNDERSTORMS, PARTICULARLY IN THE
CENTRAL MOUNTAINS, EASTERN HIGHLANDS, AND UPPER SNAKE RIVER PLAIN.
PRECIPIATION WILL SPREAD SOUTHEAST THROUGH WEDNESDAY NIGHT AND ANY
THURSDAY ACTIVITY WOULD BE IN THE EASTERN AND SOUTHEASTERN
HIGHLANDS. THIS OVERNIGHT MOVEMENT OF MOISTURE WILL BRING SOME LIGHT
SNOW TO THE MOUNTAIN TOPS, BUT IMPACTS TO TRAVEL IS NOT EXPECTED.
BY THURSDAY, WINDS WILL SWING AROUND TO BE OUT OF THE NORTH AND COOL
US OFF A FEW DEGREES FROM THE MID AND UPPER 60S ON WEDNESDAY TO THE
LOW AND MID 60S ON THURSDAY. GIVEN THE NORTHERLY WINDS, WE MAY NEED
A LAKE WIND ADVISORY, TOO, BUT IT IS BORDERLINE. BY FRIDAY MORNING,
TEMPERATURES WILL BE CHILLY AGAIN, RANGING FROM THE LOW 30S TO LOW
40S FOR MOST. BUT DRIER CONDITIONS ARE BACK BY FRIDAY MORNING, TOO,
AND WILL STAY MOSTLY DRY THROUGH THE HOLIDAY WEEKEND WITH
TEMPERATURES CLIMBING INTO THE MID 70S TO LOW 80S BY SATURDAY AND
MORE 80S ON SUNDAY AND MEMORIAL DAY.
AVIATION /00Z TAFS THROUGH 00Z THURSDAY/
ISSUED AT 420 PM MDT TUE MAY 19 2026
MOST OF THE HEAT OF THE DAY CLOUDS SHOULD DISSIPATE THIS EVENING.
WINDS EXPECTED TO GO MAINLY LIGHT AS WELL. SHOULD SEE SLIGHTLY
STRONGER WINDS FOR WEDNESDAY WITH A FEW MORE CLOUDS AS WELL IN
THE AFTERNOON.
PIH WATCHES/WARNINGS/ADVISORIES
FROST ADVISORY FROM 3 AM TO 9 AM MDT WEDNESDAY FOR IDZ051-
053>055.
FREEZE WARNING FROM 3 AM TO 9 AM MDT WEDNESDAY FOR IDZ052.
DISCUSSION...AMM
AVIATION...13
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