389
FXUS65 KPIH 131040
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
340 AM MST TUE JAN 13 2026
KEY MESSAGES
- DRY WEATHER CONTINUES INTO NEXT WEEK
- INVERSION CONDITIONS PERSIST WITH LIMITED FOG/STRATUS
- OVERALL SLOW WARMING TREND THROUGHOUT THIS WEEK
SHORT TERM /THROUGH WEDNESDAY/
ISSUED AT 1155 PM MST MON JAN 12 2026
ONLY IMPACTS WILL BE PATCHY FOG IN THE EXTREME SOUTHEAST IDAHO
VALLEYS THIS MORNING AND LATE TUESDAY NIGHT AND ALSO UNDER THE
STRONG HIGH PRESSURE WILL SEE A DEGRADATION OF AIR QUALITY
THROUGH THE WEEK. AN AIR STAGNATION ADVISORY IS IN EFFECT FOR
PARTS OF THE SNAKE RIVER PLAIN INCLUDING POCATELLO AND BLACKFOOT
AND AMERICAN FALLS AND SOUTHEAST VALLEYS NEAR THE UTAH BORDER
INCLUDING PRESTON AND MALAD CITY. HIGH TEMPERATURES TODAY MAINLY
IN THE 30S TO LOWER 40S WITH LOWS OVERNIGHT TUESDAY NIGHT INTO
WEDNESDAY MORNING IN THE TEENS AND 20S. WILL HAVE LIGHT WINDS
TODAY AND TONIGHT.
LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/
ISSUED AT 1151 AM MST MON JAN 12 2026
THERE IS STILL NO POTENTIAL FOR PRECIPITATION THROUGH THE
WEEKEND, AND THIS EVEN EXTENDS INTO NEXT WEEK. WE DO SEE THE
RIDGE SHIFTING WEST A BIT BY THE END OF THIS WEEK, WHICH MAY
KICK UP THE WIND A BIT AND ALSO TURN THE PATTERN MORE NORTHERLY
OR NORTH-NORTHWEST OVER THE STATE. THE CURRENT BLEND OF MODELS
DOESN'T REALLY SHOW ANY PROLONGED TREND DOWNWARD, AND MAINTAINS
TEMPERATURES SLOWLY WARMING UP. THE CONCERN THERE IS UNTIL WE
GET INVERSIONS TO TRULY BREAK, IT MAY BE TOO AGGRESSIVE WITH
WARMER TEMPERATURES. WITH THE FLOW ALSO TURNING MORE NORTHERLY
AGAIN, THE BLEND MAY NOT BE CAPTURING ANY TYPE OF COOLDOWN VERY
WELL AT ALL. WE MAY NEED TO MAKE ADJUSTMENTS TO TEMPERATURES IN
THE COMING DAYS.
AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/
ISSUED AT 339 AM MST TUE JAN 13 2026
VFR CONDITIONS LIKELY TO PREVAIL THROUGH THE PERIOD WITH LIGHT
WINDS AND PRECIP FREE CONDITIONS EXPECTED TO CONTINUE ACROSS
EASTERN IDAHO. WILL LIKELY SEE SOME MID/HIGH LEVEL CLOUDS
STREAKING ACROSS THE REGION AT TIMES BUT SHOULD BE OF LITTLE
IMPACT.
AIR QUALITY
ISSUED AT 1155 PM MST MON JAN 12 2026
AN AIR STAGNATION ADVISORY IS IN EFFECT THIS WEEK AS UNDER
STRONG HIGH PRESSURE WILL SEE A GRADUAL DEGRADATION OF AIR
QUALITY.
PIH WATCHES/WARNINGS/ADVISORIES
AIR STAGNATION ADVISORY UNTIL NOON MST SUNDAY FOR IDZ054-059.
SHORT TERM...GK
LONG TERM...KEYES
AVIATION...GK
AIR QUALITY...GK
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