497
FXUS65 KBOI 160601
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1201 AM MDT TUE JUN 16 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- ABOVE NORMAL TEMPERATURES THROUGH NEXT WEEKEND WITH TUESDAY
AND FRIDAY BEING THE HOTTEST DAYS.
- THE HOT TEMPERATURES TUESDAY AND WEDNESDAY WILL BE
ACCOMPANIED BY GUSTY WINDS AND VERY DRY CONDITIONS.
- A CHANCE OF SHOWERS AND THUNDERSTORMS RETURNS TO THE AREA
FRIDAY AND SATURDAY.
SHORT TERM /THROUGH THURSDAY NIGHT/
ISSUED 240 PM MDT MON JUN 15 2026
THE HEAT WILL REACH ITS PEAK ON TUESDAY WITH HIGH TEMPERATURES
INTO THE MID-90S ACROSS THE LOWER SNAKE PLAIN. A FEW SITES COULD
CLOSE IN ON 100F ALONG THE ID/OR BORDER AND AROUND HAGERMAN IN
THE SNAKE PLAIN. WINDS RAMP UP TUESDAY AFTERNOON REACHING 15 TO
25 MPH WITH GUSTS 30 TO 40 MPH. A PASSING UPPER WAVE WILL BRING
A WEAK FRONT ACROSS THE AREA TUESDAY NIGHT, AND THE POST
FRONTAL PRESSURE GRADIENT WILL MAINTAIN BREEZY WINDS ALONG THE
I-84 CORRIDOR THROUGH THE NIGHT. WHILE TUESDAY IS DRY
(PRECIPITABLE WATER VALUES IN THE 40TH %TILE), EVEN DRIER AIR
WILL MOVE IN BEHIND THE FRONT ON WEDNESDAY (PW DROPS TO 5TH
%TILE). WINDS REMAIN GUSTY ACROSS THE SNAKE PLAIN IN RESPONSE TO A
DEEPENING SURFACE LOW OVER EASTERN ID. AREAS FROM MOUNTAIN HOME
TO TWIN/JEROME WILL SEE TO AROUND 40 MPH WEDNESDAY AFTERNOON AND
EVENING. SIMILAR TO TUESDAY THE DRY AND WINDY PATTERN WILL
RESULT IN CRITICAL FIRE WEATHER CONDITIONS IN THE S-CENTRAL
SNAKE PLAIN. WEDNESDAY IS 5-10 DEGREES COOLER, THOUGH STILL
ABOUT 5 DEGREES ABOVE NORMAL.
LONG TERM /FRIDAY THROUGH TUESDAY/
ISSUED 240 PM MDT MON JUN 15 2026
AS THE HIGH PRESSURE RIDGE BUILDS, TEMPERATURES CLIMB THURSDAY
AND FRIDAY UP TO 10 TO 15 DEGREES ABOVE NORMAL BY FRIDAY. THIS
WILL MAKE FRIDAY VERY COMPARABLE TO THE HOT TEMPERATURES
FORECAST FOR TOMORROW. THE HEAT ON FRIDAY WILL BRING VERY LOW
AFTERNOON 5 TO 10% MINIMUM RHS ACROSS THE AREA, ESPECIALLY IN
LOWER ELEVATIONS.
AS THE DRY HEAT SETTLES IN, AN UPPER LEVEL TROUGH WILL MOVE INTO
THE AREA FOR THE WEEKEND. WHILE IT WILL INTRODUCE SOME
SLIGHTLY COOLER TEMPERATURES, IT WILL ALSO BRING A CHANCE OF
PRECIPITATION. THUNDERSTORMS IN SOUTHEAST OREGON AND ALONG THE
IDAHO-NEVADA BORDER FRIDAY EVENING POSE A CRITICAL FIRE WEATHER
THREAT, AND COULD PRODUCE OUTFLOW WINDS UP TO 40 MPH BASED ON
LONG RANGE FORECAST SOUNDINGS. BEHIND THE MAIN TROUGH AXIS,
WINDS ARE FORECAST TO RAMP UP ACROSS THE UPPER SNAKE RIVER PLAIN
OVER THE WEEKEND. SHOWERS AND THUNDERSTORMS MOVE INTO IDAHO ON
SATURDAY. TEMPERATURES BEGIN TO CLIMB AGAIN NEXT MONDAY AS A
RIDGE BUILDS BEHIND THE TROUGH.
AVIATION /06Z TUESDAY THROUGH WEDNESDAY/
ISSUED 1200 AM MDT TUE JUN 16 2026
VFR WITH HIGH CLOUDS OVERNIGHT. HOT TEMPERATURES WILL CAUSE HIGH
DENSITY ALTITUDES ACROSS THE AREA TUESDAY AFTERNOON. SURFACE WINDS:
LIGHT AND VARIABLE OVERNIGHT, BECOMING W-NW 10-20 KT GUSTING 25-30
KT TUESDAY AFTERNOON. WINDS ALOFT AT 10KFT MSL: NW 10-20 KT.
KBOI...VFR. HIGH DENSITY ALTITUDE TUESDAY AFTERNOON. SURFACE WINDS:
LIGHT AND VARIABLE OVERNIGHT, BECOMING NW 10-20 KT LATE TUESDAY
MORNING INTO AFTERNOON. GUSTS NW 25-30 KT AFTER 17/01Z.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....JDS
SHORT TERM...DG
LONG TERM....JM
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