532
FXUS65 KBOI 180019
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
619 PM MDT FRI JUL 17 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- SHOWERS/THUNDERSTORMS ACROSS SOUTH-CENTRAL IDAHO AND THE
CENTRAL IDAHO MOUNTAINS THROUGH LATE EVENING. STORMS WILL BE
CAPABLE OF HEAVY RAINFALL, GUSTY OUTFLOW WINDS AND SMALL HAIL.
- DRIER THIS WEEKEND WITH AREAS OF SMOKE ACROSS SOUTHEAST
OREGON, EXPANDING INTO SOUTHWEST IDAHO THIS WEEKEND AND INTO
NEXT WEEK.
- HOT TEMPERATURES THROUGH NEXT WEEK, WITH VALLEY HIGHS IN THE
UPPER 90S TO AROUND 100 DEGREES.
- SHOWERS/THUNDERSTORMS INCREASE NEXT WEEK WITH HEAVY RAINFALL
POSSIBLE.
SHORT TERM /THROUGH SUNDAY NIGHT/
ISSUED 306 PM MDT FRI JUL 17 2026
THUNDERSTORMS OVER W-CENTRAL IDAHO THIS EVENING WILL DISSIPATE
BY SUNSET. THE STORMS WILL BRING HEAVY RAIN, WITH GUSTY WINDS
AND SMALL HAIL POSSIBLE. WITH DEW POINTS 50S TO LOW 60S GUSTY
WINDS HAVE BEEN HARDER TO COME BY FROM THUNDERSTORMS. THE
WEEKEND WILL SEE DRIER CONDITIONS DEVELOP AS THE DEEPER MOISTURE
SHIFTS EAST OF THE REGION. OUTSIDE OF ISOLATED HIGH TERRAIN
THUNDERSTORMS IN W-CENTRAL IDAHO, THE AREA WILL DRY OUT THROUGH
SUNDAY. OTHERWISE IT WILL REMAIN HOT AND WE'LL SEE A INCREASE IN
SMOKE COVERAGE DUE TO WESTERLY SURFACE WINDS.
LONG TERM /MONDAY THROUGH FRIDAY/
ISSUED 306 PM MDT FRI JUL 17 2026
AFTER THE DRIER WEEKEND, ANOTHER SURGE OF MONSOON MOISTURE WILL
ARRIVE EARLY NEXT WEEK ACROSS SOUTHEAST OREGON AND SOUTHWEST
IDAHO. THIS WILL BRING A RETURN OF AIR MASS DRIVEN THUNDERSTORM
DEVELOPMENT. OUTSIDE OF EMBEDDED WAVES, CONVECTION WILL
INITIATE OVER HIGHER TERRAIN DURING THE AFTERNOON, DISSIPATING
WITH SUNSET. THE POTENTIAL FOR HEAVY RAIN AND FLOODING WILL
INCREASE AS PRECIPITABLE WATER AMOUNTS REACH 1.25 INCHES AND
SOUTHERN STEERING FLOW ALOFT WEAKENS TOWARDS MID-WEEK. LOWER
ELEVATION TEMPERATURES REMAIN IN THE UPPER 90S TO NEAR 100
THROUGH THE WEEK. SMOKE WILL LIKELY CONTINUE TO IMPACT MUCH OF
THE AREA THROUGH NEXT WEEK, ESPECIALLY ACROSS SE OREGON.
AVIATION /00Z SATURDAY THROUGH SUNDAY/
ISSUED 613 PM MDT FRI JUL 17 2026
MAINLY VFR. SCATTERED/NUMEROUS SHOWERS AND THUNDERSTORMS
CONTINUING THIS EVENING THROUGH ABOUT 03Z, MAINLY OVER SOUTH-
CENTRAL/CENTRAL ID. LOCALIZED MVFR/IFR AND MOUNTAIN OBSCURATION
IN THUNDERSTORMS. OUTFLOW GUSTS TO 35 KT POSSIBLE FROM STORMS.
HIGH DENSITY ALTITUDE DUE TO HEAT THROUGH THE EVENING UNTIL
SUNDOWN. AREAS OF DENSE SMOKE IN SE OREGON REDUCING VISIBILITY,
ESPECIALLY VICINITY OF KBNO AND KBKE. SURFACE WINDS OUTSIDE OF
STORMS: SW-NW 5-15 KT THIS EVENING, BECOMING MOSTLY NW OR
VARIABLE 5-12 KT AFTER SUNSET. VALLEY GUSTS UP TO 25 KT NEAR
KBKE AND KONO TONIGHT THROUGH EARLY MORNING. WINDS ALOFT AT
10KFT MSL: S 10-20 KT.
KBOI...MAINLY VFR. A 15% CHANCE OF THUNDERSTORMS WITHIN 10 MILES
OF THE TERMINAL THROUGH AROUND 02Z THIS EVENING. THUNDERSTORMS
CAPABLE OF OUTFLOW GUSTS TO 30 KT AND BRIEF HEAVY RAIN. HIGH
DENSITY ALTITUDE DUE TO HEAT THROUGH SUNDOWN. W-NW SURFACE
WINDS WITH SMOKE/HAZE FROM SE OREGON INCREASING SATURDAY.
WEEKEND OUTLOOK...ISOLATED SHOWERS/THUNDERSTORMS OVER SOUTH-
CENTRAL ID AND THE CENTRAL ID MTNS SATURDAY AFTERNOON. MOUNTAIN
OBSCURATION FROM STORMS. HIGH DENSITY ALTITUDE DUE TO HEAT.
AREAS OF SMOKE REDUCING VISIBILITY MOSTLY ACROSS SE OREGON AND
NEAR THE OR/ID BORDER IN SW IDAHO. SURFACE WINDS OUTSIDE OF
STORMS: SW-NW 5-15 KT, AFTERNOON GUSTS 15-25 KT.
BOI WATCHES/WARNINGS/ADVISORIES
ID...OR...AIR QUALITY ALERT UNTIL NOON PDT MONDAY FOR ORZ061-062.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....NF
SHORT TERM...DG
LONG TERM....DG
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