875
FXUS65 KPIH 100436
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1036 PM MDT SUN AUG 9 2026
KEY MESSAGES
- RED FLAG WARNINGS FOR THE CENTRAL MOUNTAINS AND THE SNAKE
RIVER PLAIN/SHOSHONE REGION MONDAY AFTERNOON INTO EARLY
EVENING DUE TO LOW RELATIVE HUMIDITY AND BREEZY WINDS.
- VERY SMALL CHANCE FOR AN ISOLATED (VIRGA) SHOWER OR STORM
MONDAY AFTERNOON, MAINLY IN THE SOUTH HILLS.
- WILDFIRE SMOKE WILL CONTINUE TO IMPACT THE AREA ON AND OFF FOR
THE NEXT FEW DAYS. EXPECT DECREASED AIR QUALITY AT TIMES WITH
AN AIR QUALITY ADVISORY REMAINING IN EFFECT FOR CUSTER COUNTY.
DISCUSSION
ISSUED AT 156 PM MDT SUN AUG 9 2026
SHORT TERM IMPACTS WILL AGAIN BE SOME AIR QUALITY ISSUES WITH
SMOKE PERSISTING THROUGHOUT ALL OF SOUTHEAST IDAHO TO SOME
EXTENT. WILL REMAIN VERY HOT THROUGH TUESDAY WITH LOW ELEVATION
HIGHS REMAINING IN THE 90S BUT THINK TRIPLE DIGIT HIGHS ARE DONE
FOR NOW. WILL HAVE SOME CONVECTIVE ACTIVITY BUT VERY ISOLATED
THIS AFTERNOON AND EVENING AND MONDAY MAINLY IN THE SOUTHERN
MOUNTAINS. AFTERNOONS BOTH TODAY AND MONDAY WILL BE BREEZY WITH
WIDESPREAD 20 TO 30 MPH GUSTS ESPECIALLY ON MONDAY AFTERNOON.
OTHER ISSUE WILL BE A PATTERN CHANGE EXPECTED WEDNESDAY THROUGH
NEXT WEEKEND WITH WETTER AND COOLER CONDITIONS EXPECTED. HAVE
MUCH HIGHER CHANCE OF SHOWERS AND THUNDERSTORMS THURSDAY THROUGH
SUNDAY. HIGH TEMPERATURES ARE EXPECTED TO BE WELL BELOW NORMAL
AS WELL MID WEEK THROUGH NEXT WEEKEND FOR A CHANGE AS WELL.
MAINLY 70S AND 80S WITH SOME DAYS IN THE 60S MOUNTAINS.
AVIATION /06Z TAFS THROUGH 06Z TUESDAY/
ISSUED AT 1019 PM MDT SUN AUG 9 2026
EXPECT VFR CONDITIONS AT ALL TAF SITES THROUGH THE PERIOD. KEPT
SMOKE VISIBILITIES AT 6 MILES OR ABOVE THROUGH MONDAY. BRIEF
MVFR CONDITIONS DUE TO SMOKE IS POSSIBLE FOR BYI, PIH, AND IDA
IN THE MORNING UNDER A HIGH PRESSURE INVERSION. SUN COULD SEE
REDUCED VIS IMPACTS IN THE MID TO LATE MORNING INTO TOMORROW
AFTERNOON. MAIN IMPACT, OTHER THAN OCCASIONAL SMOKE VISIBILITY
RESTRICTIONS, WILL BE INCREASE IN WINDS MONDAY AFTERNOON AFTER
18Z. EXPECT 20 TO 25 KNOT GUSTS AT PIH, IDA, DIJ AND SUN. WINDS
BACK OFF IN THE EARLY EVENING TOMORROW.
FIRE WEATHER
UPDATE ISSUED AT 1019 PM MDT SUN AUG 9 2026
ELEVATED FIRE WEATHER CONDITIONS WILL PERSIST THROUGH THE FIRST
PART OF THIS WEEK DUE TO THE COMBINATION OF CRITICAL MINIMUM RH
VALUES AND GUSTY WINDS. WINDS CONTINUE TO BE MARGINAL ACROSS
MUCH OF THE REGION WITH HIGHER CONFIDENCE IN WINDS REACHING
CRITICAL THRESHOLDS TOMORROW WITH GUSTS TO 25 TO 30 MPH ACROSS
FIRE WEATHER ZONES 410, 425, 475, AND 476. RED FLAG WARNINGS
WERE ALLOWED TO EXPIRE THIS EVENING FOR ZONES 475 AND 476. RED
FLAG WARNINGS WERE ISSUED FOR MONDAY AFTERNOON INTO EARLY
EVENING FOR ZONES 410, 425, 475, AND 476. WE ANTICIPATE MORE
ISOLATED POCKETS OF RED FLAG CONDITIONS TO MATERIALIZE
ELSEWHERE, AS WELL.
A DEEPENING TROUGH ALONG THE PACIFIC COAST WILL CONTINUE TO
GRADUALLY FLATTEN THE RIDGE OF HIGH PRESSURE OVER IDAHO,
RESULTING IN A GRADUAL COOL-DOWN THROUGH LATE THIS WEEK. DAYTIME
HIGHS WILL RETURN TO AROUND NORMAL BY THE MIDDLE OF THIS WEEK,
TURNING COOLER THAN NORMAL LATE WEEK. MONSOON MOISTURE WILL
RETURN FOR THE LATTER HALF OF THIS WEEK, RAISING HUMIDITIES
ABOVE CRITICAL THRESHOLD BEGINNING WEDNESDAY.
AIR QUALITY
ISSUED AT 209 AM MDT SAT AUG 8 2026
AN AIR QUALITY ADVISORY REMAINS IN EFFECT FOR CUSTER COUNTY
THROUGH MONDAY AFTERNOON DUE TO AIR QUALITY EXPECTED TO REMAIN
IN THE "MODERATE" TO "UNHEALTHY FOR SENSITIVE GROUPS"
CATEGORIES.
PIH WATCHES/WARNINGS/ADVISORIES
RED FLAG WARNING FROM 2 PM TO 9 PM MDT MONDAY FOR IDZ410-425-
475-476.
AIR QUALITY ALERT UNTIL 3 PM MDT MONDAY FOR IDZ068>074.
DISCUSSION...GK
AVIATION...TW
FIRE WEATHER...CROPP/TW
AIR QUALITY...AMM
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