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FXUS65 KPIH 080343
AFDPIH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE POCATELLO ID
943 PM MDT FRI AUG 7 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.
- WARMING TREND HAS BEGUN WITH HIGHS APPROACHING 100 DEGREES IN
THE LOWER ELEVATIONS FRIDAY THROUGH THE WEEKEND. A HEAT
ADVISORY IS IN EFFECT FOR THE SOUTH HILLS, RAFT RIVER REGION,
FRANKLIN/EASTERN ONEIDA REGION, EASTERN MAGIC VALLEY, SNAKE
RIVER PLAIN, SHOSHONE/LAVA BEDS, ARCO MUD LAKE DESERT, MARCH
AND ALBION HIGHLANDS, BLACKFOOT MOUNTAINS THROUGH LATE
SATURDAY.
- NO PRECIPITATION IN THE FORECAST FOR THIS WEEK, BUT INCREASING
POTENTIAL FOR MONSOON MOISTURE TO RETURN VERY LATE NEXT WEEK.
SOME COOLING MID WEEK NEXT WEEK THROUGH THE END OF NEXT WEEK.
DISCUSSION
ISSUED AT 1246 PM MDT FRI AUG 7 2026
MAIN IMPACT IS THE RETURN OF EXTREME HEAT WITH HEAT ADVISORIES
IN EFFECT FOR A GOOD PORTION OF SOUTHEAST IDAHO THROUGH
SATURDAY. HIGH TEMPERATURES APPROACHING 100 IN MANY AREAS THIS
AFTERNOON AS WELL AS SATURDAY AFTERNOON WITH MOST AREAS MID TO
UPPER 90S IN THE ADVISORY AREA. STILL HAVE SOME WILDFIRE SMOKE
IN THE REGION IN AND OUT TO VARYING DEGREES WITH AN AIR QUALITY
ALERT IN CUSTER COUNTY. FORECAST GRIDS HAVE DRY CONDITIONS WITH
SLIGHT COOLING INTO THE MIDDLE OF NEXT WEEK WITH A SLIGHT CHANCE
OF SHOWERS AND THUNDERSTORMS RETURNING NEXT THURSDAY AND FRIDAY
MAINLY IN THE SOUTHEAST MOUNTAINS. WINDS NOT EXPECTED TO BE
OVERLY STRONG THROUGH THE PERIOD WITH SOME HIGH ELEVATION GUSTS
UPWARDS OF 25 MPH TOMORROW AND SUNDAY.
AVIATION /00Z TAFS THROUGH 00Z SUNDAY/
ISSUED AT 934 PM MDT FRI AUG 7 2026
SOME MID- AND HIGH LEVEL CLOUDINESS IS EXPECTED TO DEVELOP
DURING THE AFTERNOON AND EARLY EVENING OVER EACH AND EVERY
AIRDROME ON SAT. THE UPPER LEVEL RIDGE THAT HAS DOMINATED THE
WEATHER FOR OVER A WEEK IS STARTING TO DETERIORATE AND SHIFT
EASTWARD. TSRA MADE IT TO THE ID-UT BORDER ON FRI AFTERNOON, AND
THIS AREA WILL PUSH INTO SOUTHERN ID ON SAT, SO THERE IS
ACTUALLY A VCSH FOR KBYI. BUT IT WOULD HAVE A HARD TIME PUSHING
FARTHER NORTH WITH THE UPPER LEVEL WIND STRONGLY OUT OF THE WEST
OVER THE REMAINDER OF THE REGION. THIS MID- AND HIGH LEVEL
MOISTURE COULD DEVELOP SOME CIGS, BUT AT THAT ELEVATION THEY ARE
NOT IMPACTFUL. MOSTLY LIKELY CIG AIRPORTS ARE KPIH AND KBYI.
WILDFIRE FU CONTINUES TO BE AN ISSUE. HOWEVER, GROWING
INSTABILITY IN THE AFTERNOON SHOULD KEEP FU FROM IMPACTING VSBY
MUCH IN THAT TIME OF DAY, SAVE PERHAPS FOR KSUN WHEN THE WIND
SHIFTS TO THE SOUTH AND PUSHES THE FU INTO THE WOOD RIVER
VALLEY. KPIH AND KIDA HAVE A RISK IN THE MORNING BEFORE THE
INVERSION BREAKS.
WIND IS EXPECTED TO BE SOMEWHAT STRONGER IN THE AFTERNOON, WITH
G20KT OR G25KT POSSIBLE WITH SUSTAINED OF 15KT AT MOST
LOCATIONS. AFTERNOON DIRECTION SHOULD BE BASED ON SLOPE-VALLEY
PHENOMENON AND NOT AN ISSUE OF CROSS WIND.
FIRE WEATHER
ISSUED AT 206 AM MDT FRI AUG 7 2026
HIGH PRESSURE DIRECTLY OVER EASTERN IDAHO TODAY CONTINUES OUR TREND
OF TEMPERATURES HEATING UP, MIN RHS DROPPING TO CRITICALLY LOW
LEVELS, AND BREEZY WINDS OF 15 TO 25 MPH. WIND GUSTS EACH AFTERNOON
WILL REMAIN VERY CLOSE TO CRITICAL FIRE WEATHER CONDITIONS AROUND 20
TO 25 MPH IN THE CENTRAL MOUNTAINS, SO WILL CONTINUE TO EVALUATE RED
FLAG WARNING POTENTIAL FOR SATURDAY AND SUNDAY AFTERNOONS AS THESE
WINDS INCREASE SLIGHTLY. AT THIS POINT, SUNDAY LOOKS LIKE IT MIGHT
BE THE DAY TO WATCH FOR MORE WIDESPREAD CRITICAL FIRE WEATHER
CONDITIONS. NEXT WEEK, TROUGHING OVER THE WEST BEGINS TO HELP OUR
TEMPERATURES COOL SLIGHTLY EACH DAY AND BRING MIN RHS BACK INTO THE
15 TO 25 PERCENT RANGE UNLIKE THE 10-15 PERCENT RANGE WE'RE SITTING
IN TODAY AND THROUGH THE WEEKEND.
AIR QUALITY
ISSUED AT 1246 PM MDT THU AUG 6 2026
AN AIR QUALITY ADVISORY IS NOW IN EFFECT THROUGH FRIDAY AFTERNOON
FOR BONNEVILLE, BUTTE, CLARK, CUSTER, FREMONT, JEFFERSON, MADISON,
AND TETON COUNTIES DUE TO AIR QUALITY BEING "UNHEALTHY FOR SENSITIVE
GROUPS." ELSEWHERE, ALERTS HAVE BEEN LIFTED DUE TO IMPROVEMENTS TO
"MODERATE" AIR QUALITY.
PIH WATCHES/WARNINGS/ADVISORIES
HEAT ADVISORY UNTIL 11 PM MDT SATURDAY FOR IDZ051>059-062.
AIR QUALITY ALERT UNTIL 3 PM MDT MONDAY FOR IDZ068>074.
RED FLAG WARNING FROM 1 PM TO 9 PM MDT SATURDAY FOR IDZ475-476.
DISCUSSION...GK
AVIATION...MESSICK
FIRE WEATHER...CROPP
AIR QUALITY...CROPP
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