079
FXUS65 KPIH 311126
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
426 AM MST SAT JAN 31 2026
KEY MESSAGES
- TEMPERATURES WILL STEADILY CLIMB THROUGH THE WEEKEND, WITH
MANY AFTERNOON HIGHS REACHING THE 40S AND LOWER 50S BY SUNDAY.
- AFTER A BRIEF RELATIVE COOLDOWN MONDAY AND TUESDAY, THE DRY
AND WARMING TREND RETURNS THROUGH THE END OF THE WEEK.
- STAGNANT AIR MASS WILL REMAIN IN PLACE THROUGH THE WEEKEND.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED AT 129 AM MST SAT JAN 31 2026
UPPER LEVEL RIDGE WILL AMPLIFY TODAY AND TOMORROW, RESULTING IN
GRADUAL WARMING EACH DAY AND DRY CONDITIONS AREAWIDE. WIDESPREAD
DAYTIME TEMPERATURES WILL REACH MORE THAN 10 DEGREES ABOVE
CLIMATOLOGICAL NORMS, WARMING INTO THE 40S AND EVEN 50S ACROSS THE
SOUTH HILLS AND RAFT RIVER REGIONS. WHILE PATCHY FOG REMAINS
POSSIBLE, MID-AND HIGH-LEVEL CLOUDS CONTINUE TO LIMIT DEVELOPMENT.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED AT 117 PM MST FRI JAN 30 2026
A PAIR OF WEAK AND DRY SHORTWAVES BRIEFLY FLATTEN THE RIDGE FOR
MONDAY AND TUESDAY, BUT MOISTURE ASSOCIATED WITH THESE FEATURES
APPEARS TO REMAIN TOO FAR NORTH TO IMPACT EAST IDAHO. THE
WARMING TREND STALLS TEMPORARILY FOR BOTH MONDAY AND TUESDAY IN
RESPONSE TO THESE FEATURES, THEN RETURNS THROUGH THE REMAINDER
OF THE WEEK. BY THE END OF THE WEEK, MODEL PROBABILITIES SUGGEST
THE CHANCE FOR DAYTIME HIGHS EXCEEDING 50 DEGREES IS GREATER
THAN 65% FOR ALMOST THE ENTIRETY OF THE SNAKE PLAIN AND
SURROUNDING VALLEYS.
AVIATION /12Z TAFS THROUGH 12Z SUNDAY/
ISSUED AT 423 AM MST SAT JAN 31 2026
VFR CONDITIONS FORECAST THROUGH THE PERIOD UNDER AMPLIFYING
RIDGE. CLOUDS FORECAST TO SCATTER THROUGH THE FIRST PART OF
TODAY AND WINDS WILL REMAIN LIGHT.
AIR QUALITY
ISSUED AT 117 PM MST FRI JAN 30 2026
RIDGE OF HIGH PRESSURE REBUILDS FOR THE WEEKEND, STRENGTHENING
SURFACE BASED INVERSIONS AND INCREASING THE POTENTIAL FOR
POLLUTANT TRAPPING. A PAIR OF WEAK SHORTWAVES MAY BE ENOUGH TO
TEMPORARILY BREAK DOWN INVERSIONS MONDAY AND TUESDAY, BUT THE
RIDGE REDEVELOPS FOR THE LATTER HALF OF THE WEEK, AND STAGNANT
CONDITIONS ARE LIKELY TO RETURN.
PIH WATCHES/WARNINGS/ADVISORIES
AIR STAGNATION ADVISORY UNTIL NOON MST MONDAY FOR IDZ054-059.
SHORT TERM...CROPP
LONG TERM...DMH
AVIATION...CROPP
AIR QUALITY...DMH
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