022
FXUS65 KPIH 090403
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
1003 PM MDT SAT AUG 8 2026
KEY MESSAGES
- 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.
- HEAT ADVISORY CONTINUES THROUGH THIS EVENING FOR THE EASTERN
MAGIC VALLEY, SOUTH HILLS, AND SNAKE RIVER PLAIN. EXPECT
SLIGHT COOLING SUNDAY WITH A COOLING TREND THROUGH THE WEEK.
- WILL SEE BETTER CHANCE FOR PRECIPITATION THURSDAY INTO NEXT
WEEKEND.
- VERY SMALL CHANCE FOR AN ISOLATED SHOWER OR STORM THIS
AFTERNOON, MAINLY IN THE SOUTH HILLS.
DISCUSSION
ISSUED AT 201 PM MDT SAT AUG 8 2026
HOT CONDITIONS REMAIN IN PLACE TODAY WITH LOW ELEVATIONS IN THE
MID TO UPPER 90S WITH LOCALIZED AREAS REACHING 100. HEAT
ADVISORY FOR MUCH OF THE AREA REMAINS IN EFFECT UNTIL 11 PM.
ONLY VERY LOW CHANCE OF SHOWERS AND THUNDERSTORMS IN SOUTHERN
MOUNTAINS. GENERAL DRY CONDITIONS EXPECTED THROUGH MID WEEK WITH
A COOLING TREND AS UPPER RIDGE FLATTENS A BIT WITH MORE OF A
WESTERLY PUSH. AREAS OF SMOKE WILL REMAIN FOR THE NEXT COUPLE OF
DAYS AS WELL WITH CUSTER COUNTY STILL IN AN AIR QUALITY
ADVISORY. BY LATE WEEK FLOW ALOFT BECOMES MORE SOUTHWESTERLY
WHICH MAY ALLOW SOME OF THE MONSOONAL MOISTURE TO RETURN WITH A
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE GRIDS THURSDAY
THROUGH NEXT SATURDAY. TEMPERATURES FALL TO BELOW NORMAL WITH
THE EXPECTED CLOUD COVER THURSDAY THROUGH SATURDAY AS WELL WITH
LOW ELEVATIONS IN THE UPPER 70S AND 80S AND MOUNTAINS MAINLY
UPPER 60S AND 70S.
AVIATION /00Z TAFS THROUGH 00Z MONDAY/
ISSUED AT 957 PM MDT SAT AUG 8 2026
SOME MID-LEVEL MOISTURE HAS WORKED ITS WAY INTO EASTERN IDAHO.
THIS MAY LEAD TO SOME LIGHT SHOWERS IN THE KPIH AREA, BUT IT
SHOULDN'T AFFECT VSBY. THE VSBY AT KSUN MAY BE AFFECTED BY SMOKE
FROM CENTRAL IDAHO WILDFIRES AND OTHER POINTS WEST.
CIG IS POSSIBLE AT KPIH IN THE EARLY TO MID-MORNINGS, BUT STILL
MID-LEVEL AT WORST.
WIND IS DRIVEN BY SLOPE-VALLEY PHENOMENON WITH WIND UP TO 15KT
POSSIBLE. BUT A LOT OF THE DOWNSLOPE HOURS ARE LIKELY VRB AND
LESS THAN 5KT.
FIRE WEATHER
ISSUED AT 118 PM MDT SAT AUG 8 2026
ELEVATED FIRE WEATHER CONDITIONS ARE ANTICIPATED THROUGH THE FIRST
PART OF NEXT WEEK DUE TO THE COMBINATION OF CRITICAL MINIMUM RH
VALUES AND GUSTY WINDS. WHILE MIN RH WILL LARGELY RANGE 10 TO 15
PERCENT THROUGHOUT THE PERIOD, WINDS WILL BE MARGINAL ACROSS MUCH OF
THE REGION. CONFIDENCE IN WINDS REACHING THRESHOLD IS HIGHER ACROSS
FIRE WEATHER ZONES 475 AND 476, WHERE WIDESPREAD GUSTS TO AT LEAST
25 MPH ARE EXPECTED WITH GUSTS REACHING 30 MPH ALONG RIDGELINES.
THEREFORE, A RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THROUGH 9
PM TODAY FOR THE TWO AFOREMENTIONED ZONES. UPON EXPIRATION, THE RED
FLAG WARNING WILL NEED TO BE REISSUED TO ACCOUNT FOR THIS EXTENDED
PERIOD OF DRY AND BREEZY CONDITIONS. WINDS WILL INCREASE SLIGHTLY
SUNDAY AND MONDAY, WHICH IS WHEN WE EXPECT MORE POCKETS OF RED FLAG
CONDITIONS TO MATERIALIZE ELSEWHERE, AS WELL. A RED FLAG WARNING MAY
BE WARRANTED FOR FWZ 410 ON MONDAY DUE TO MORE WIDESPREAD 30 MPH
WIND GUSTS.
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 UPCOMING WEEK. DAYTIME
HIGHS WILL RETURN TO AROUND NORMAL BY MID-WEEK, TURNING COOLER THAN
NORMAL LATE WEEK. DRY CONDITIONS WILL LINGER FOR ANOTHER WEEK OR SO,
WITH MODELS INDICATING THE RETURN OF MONSOON MOISTURE BY THE LATTER
HALF OF NEXT WEEK.
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
HEAT ADVISORY UNTIL 11 PM MDT THIS EVENING FOR IDZ051>059-062.
AIR QUALITY ALERT UNTIL 11 PM MDT THIS EVENING FOR IDZ068>074.
AIR QUALITY ALERT FROM NOON TO 9 PM MDT SUNDAY FOR IDZ068>074.
RED FLAG WARNING FROM NOON TO 9 PM MDT SUNDAY FOR IDZ475-476.
DISCUSSION...GK
AVIATION...MESSICK
FIRE WEATHER...CROPP
AIR QUALITY...AMM
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