911
FXUS65 KBOI 051640
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1040 AM MDT TUE MAY 5 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- WINDY CONDITIONS THIS AFTERNOON WITH NORTHERLY WINDS.
- ISOLATED AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS TODAY
OVER THE MOUNTAINS OF S IDAHO AND SE OREGON, OTHERWISE DRY.
- ABOVE NORMAL TEMPERATURES CONTINUE WITH 10-15 DEGREES ABOVE
NORMAL BY NEXT WEEK.
SHORT TERM /THROUGH THURSDAY NIGHT/
ISSUED 406 AM MDT TUE MAY 5 2026
NORTHERLY FLOW WILL CONTINUE OVER THE AREA AS A TROUGH REMAINS
OVER SOUTHERN CA, WITH COOL AIR EAST OF THE ROCKIES AND A RIDGE
OVER SW BRITISH COLUMBIA. AIR FLOW WILL CONVERGE OVER THE
CENTRAL ID MOUNTAINS AND MAGIC VALLEY, AS AIR FROM EASTERN OR
CONVERGES WITH AIR FROM EASTERN ID AND MT MOVING DOWN THE SNAKE
BASIN. THIS CONVERGENCE ZONE FAVORS ISOLATED SHOWERS AND
THUNDERSTORMS TUESDAY AFTERNOON. ELSEWHERE WINDY NORTHERLY
CONDITIONS EXPECTED TUESDAY AFTERNOON WITH GUSTS OF 30 TO 40
MPH. NORTHWEST FLOW CONTINUES INTO THURSDAY WITH DRY AND BREEZY
CONDITIONS DURING THE AFTERNOON. TEMPERATURES RANGE AROUND 5 TO
10 DEGREES ABOVE NORMAL IN THE SHORT TERM.
LONG TERM /FRIDAY THROUGH TUESDAY/
ISSUED 406 AM MDT TUE MAY 5 2026
A DRY COLD FRONT WILL MOVE THROUGH THE AREA ON FRIDAY AFTERNOON,
BRINGING BREEZY CONDITIONS AND LOWERING TEMPERATURES TO NEAR
NORMAL. THEN THE UPPER LEVEL RIDGE REDEVELOPS OVER THE WESTERN
US, WITH THE WARMEST TEMPERATURES OF THE SEASON BY NEXT MONDAY
AND TUESDAY. TEMPERATURES RISE 15 TO 20 DEGREES ABOVE NORMAL WITH
HIGHS OF 85 TO 90 DEGREES IN THE SNAKE BASIN.
AVIATION /18Z TUESDAY THROUGH WEDNESDAY/
ISSUED 1034 AM MDT TUE MAY 5 2026
VFR. AREAS OF SMOKE. ISOLATED SHOWERS/THUNDERSTORMS ACROSS THE
HIGHER TERRAIN OF SOUTHEAST OREGON AND CENTRAL ID MOUNTAINS
THIS AFTERNOON AND EVENING. 30% CHANCE OF THUNDERSTORMS
AFFECTING KTWF/KJER BETWEEN 05/22Z AND 06/02Z. GUSTY ERRATIC
OUTFLOW WINDS POSSIBLE WITH THE STRONGER STORMS. SURFACE WINDS:
W-NW 15-25 KT WITH GUSTS UP TO 35 KT THROUGH THE EVENING.
BECOMING LIGHT AND VARIABLE OVERNIGHT. WINDS ALOFT AT 10K FT
MSL: N 15-30 KT.
KBOI...VFR. CUMULUS BUILDUPS EAST OF TERMINAL THIS AFTERNOON.
SURFACE WINDS: NW 15-20 KT WITH GUSTS AROUND 30 KT THIS
AFTERNOON. BECOMING SE 10-20KT AFTER 06/08Z.
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.....JR
SHORT TERM...KA
LONG TERM....KA
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