159
FXUS65 KPIH 261923
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
123 PM MDT SUN APR 26 2026
KEY MESSAGES
- COLD OVERNIGHT LOWS CONTINUE INTO EARLY IN THE WORK WEEK. A
FREEZE WARNING IS IN EFFECT FOR TONIGHT.
- WEAK UPPER LEVEL TROUGHING OVER THE NORTHERN ROCKIES WILL
INTERACT WITH MOISTURE MOVING IN FROM THE SOUTH TO GENERATE
SHOWERS AND THUNDERSTORMS TODAY.TROUGHING CONTINUES THROUGH AT
LEAST WEDNESDAY NIGHT.
- AFTERNOON SLIGHT CHANCE RISK OF THUNDERSTORMS OCCURS EVERY DAY
THROUGH AT LEAST THURSDAY.
DISCUSSION
ISSUED AT 123 PM MDT SUN APR 26 2026
WATER VAPOR SATELLITE IMAGERY SHOWS COMPLEX TROUGH EXTENDING
FROM LOW IN CANADA SOUTHWEST TO NORTHERN CALIFORNIA. MULTIPLE
SHORTWAVE FEATURES ARE VISIBLE WITHIN THE LARGER PATTERN.
SHORTWAVE MOVING THROUGH EAST IDAHO TODAY PRODUCING LIGHT
PRECIPITATION ACROSS THE EASTERN HALF OF THE REGION. SNOW LEVELS
ARE ROUGHLY 6500-7000 FT ELEVATION, BUT THE LIQUID AMOUNTS ARE
LIGHT SO EVEN AT HIGHER ELEVATIONS, ACCUMULATIONS REMAIN MEAGER.
NEXT SHORTWAVE FEATURE DROPS THROUGH THE IDAHO PANHANDLE AND
WESTERN MONTANA THIS AFTERNOON AND EVENING, BRINGING ADDITIONAL
SNOW SHOWERS TO HIGHER ELEVATIONS. AGAIN, AMOUNTS REMAIN LIGHT.
ACROSS THE SNAKE PLAIN, CLEARING IS EXPECTED OVERNIGHT BETWEEN
SHORTWAVE FEATURES FOR ANOTHER NIGHT OF COLD TEMPERATURES. NBM
PROBABILITIES SUPPORT > 80% CHANCE OF TEMPERATURES AT OR BELOW
FREEZING FOR A SIGNIFICANT PORTION OF THE SNAKE PLAIN. AREAS
ALONG THE INTERSTATE CORRIDOR HAS SLIGHTLY LESS CHANCES WITH
FORECAST TEMPERATURES JUST ABOVE FREEZING, BUT STILL A GOOD
CHANCE FOR FROST OVERNIGHT. ISSUED ANOTHER FREEZE WARNING GIVEN
THE ZONE COVERAGES OF TEMPERATURES AT OR BELOW 32F.
EAST IDAHO REMAINS UNDER THE INFLUENCE OF THE BROAD COMPLEX
TROUGH THROUGH MID WEEK, WITH CONTINUED UNSETTLED CONDITIONS
MAINLY OVER HIGHER TERRAIN, AND COLD TEMPERATURES NEAR FREEZING
FOR THE SNAKE PLAIN GROWING REGION EACH NIGHT. MODELS SHIFT THE
TROUGH EAST BEGINNING THURSDAY, ALLOWING FOR BRIEF RIDGE OF HIGH
PRESSURE TO TILT ACROSS THE REGION. DRIER CONDITIONS REDEVELOP,
ALONG WITH A MORE CONSISTENT WARMING TREND TO FINISH OUT THE
WORK WEEK. NEXT SYSTEM ARRIVES FOR THE WEEKEND, WITH A RETURN
TO UNSETTLED CONDITIONS.
AVIATION /18Z TAFS THROUGH 18Z MONDAY/
ISSUED AT 1123 AM MDT SUN APR 26 2026
SOME MOISTURE HAS WORKED NORTH INTO EASTERN IDAHO AROUND UPPER
LEVEL LOW AND MAIN IMPACT WILL BE SOME LOWER CEILINGS MAINLY AT
DIJ WITH SOME MVFR CONDITIONS POSSIBLE. EXPECT SOME LIFTING OF
CLOUDS TONIGHT WITH VFR CONDITIONS WIDESPREAD WITH ONLY MID
LEVEL TO HIGH LEVEL CLOUD CEILINGS. GENERAL SLOPE WINDS WITH 10
TO 15 KNOTS IN AFTERNOON AT BYI, IDA AND BYI.
PIH WATCHES/WARNINGS/ADVISORIES
FREEZE WARNING FROM 3 AM TO 10 AM MDT MONDAY FOR IDZ051>055.
DISCUSSION...DMH
AVIATION...GK
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