330
FXUS65 KBOI 222011
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
211 PM MDT MON JUN 22 2026
KEY MESSAGES
- GRADUALLY HOTTER AND DRIER THROUGH WEDNESDAY. ONLY SLIGHT
COOLING BUT STILL DRY THURSDAY.
- SLIGHT CHANCE OF AFTERNOON THUNDERSTORMS TUESDAY AND WEDNESDAY
SOUTH OF THE ID/NV BORDER, BUT OUTFLOW WINDS MAY REACH SOUTHERN
OWYHEE AND TWIN FALLS COUNTIES.
- MAJOR CHANGE BEGINNING FRIDAY WITH ARRIVAL OF A COLD FRONT AND
SHOWERS, FOLLOWED BY GUSTY WINDS, MORE SHOWERS AND CHANCE OF
THUNDERSTORMS THROUGH SUNDAY. SNOW POSSIBLE AS LOW AS 6500 TO
7000 FEET MSL SATURDAY NIGHT AND SUNDAY.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
GENERALLY CLEAR AND GRADUALLY HOTTER THROUGH WEDNESDAY AS A
LOW-AMPLITUDE PACIFIC UPPER RIDGE COMES INLAND. SLIGHT CHANCE
OF AFTERNOON THUNDERSTORMS TUESDAY AND WEDNESDAY SOUTH OF THE
ID/NV BORDER, BUT OUTFLOW WINDS MAY REACH SOUTHERN OWYHEE AND
TWIN FALLS COUNTIES. LIGHT EAST WINDS TUESDAY, THEN LIGHT TO
MODERATE WEST OR NORTHWEST WINDS WEDNESDAY.
LONG TERM /THURSDAY THROUGH MONDAY/
WARM AND DRY CONDITIONS WILL CONTINUE ON THURSDAY. A SHORTWAVE
TROUGH WILL DIG ACROSS OUR AREA EARLY THURSDAY. THIS PATTERN
WILL STEER SOME SUBTROPICAL MOISTURE INTO THE REGION, BRINGING
SCATTERED SHOWERS/THUNDERSTORMS OVER THE CENTRAL ID MOUNTAINS
AND NEAR THE NV BORDER THURSDAY AFTERNOON/EVENING. GUIDANCE
CONFIDENCE REMAINS STRONG ON A STRONG UPPER LOW DIGGING INTO
THE REGION FROM THE GULF OF ALASKA FRIDAY THROUGH THE WEEKEND.
THIS SYSTEM HAS POTENTIAL TO BRING SIGNIFICANT PRECIPITATION
FRIDAY AND OVER THE WEEKEND. A COLD FRONTAL PASSAGE IS EXPECTED
ON FRIDAY, BRINGING WIDESPREAD SHOWERS/THUNDERSTORMS IN THE
AFTERNOON/EVENING. SATURDAY AND SUNDAY WILL MAINLY SEE SHOWERS/
THUNDERSTORMS OVER HIGHER TERRAIN ON THE ID SIDE. OVERALL, THERE
REMAINS UNCERTAINTY OVER THE EXACT TRACK OF THIS APPROACHING LOW,
BUT THE WEEKEND THROUGH MONDAY WILL HAVE GOOD POTENTIAL FOR WETTING
RAINS AND TEMPERATURES COOLING DOWN TO 10 TO 20 DEGREES BELOW NORMAL.
SNOW IS POSSIBLE ABOVE 6500 FEET MSL NORTH AND 7000 FEET MSL SOUTH
SATURDAY NIGHT AND SUNDAY MORNING.
AVIATION /18Z MONDAY THROUGH TUESDAY/
ISSUED 1124 AM MDT MON JUN 22 2026
VFR WITH CLEAR SKIES. SURFACE WINDS: N-NW 5-15 KT THIS
AFTERNOON WITH GUSTS 20- 25 KT MAINLY EAST OF KBOI. WINDS ALOFT
AT 10KFT MSL: W 10-20 KT.
KBOI...VFR WITH CLEAR SKIES. SURFACE WINDS: NW 7-12 KT WITH
GUSTS UP TO 20 KT DURING THE AFTERNOON, BEFORE LOWERING TO 5-10
KT IN THE EVENING AFTER 02Z.
BOI WATCHES/WARNINGS/ADVISORIES
ID...OR...NONE.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...LC
LONG TERM....JY
AVIATION.....JY
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