705
FXUS65 KBOI 042011
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
211 PM MDT MON MAY 4 2026
KEY MESSAGES
- ABOVE NORMAL TEMPERATURES INTO NEXT WEEKEND. SLIGHTLY COOLER
TUESDAY AND WEDNESDAY BUT WARMER AGAIN THURSDAY THROUGH
SUNDAY.
- ISOLATED AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS TODAY
AND TUESDAY NEAR THE ID/NV BORDER AND IN SOUTH-CENTRAL IDAHO.
- WINDY THIS AFTERNOON AND AGAIN TUESDAY AFTERNOON, ESPECIALLY
IN THE SNAKE BASIN IN IDAHO, WITH TUESDAY THE WINDIER DAY.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
AT 2 PM MDT CONVECTIVE CLOUDS WERE FORMING ALONG AND SOUTH OF
THE ID/NV BORDER BUT DRY NORTH-NORTHEASTERLY FLOW ALOFT SHOULD
LIMIT OR PREVENT THEM FROM GETTING ANY MORE THAN A FEW MILES
ACROSS THE BORDER INTO SOUTHERN IDAHO (OWYHEE AND TWIN FALLS
COUNTIES). AN UPPER LOW IN CALIFORNIA WILL MAKE CLOSEST APPROACH
TO OUR CWA THIS EVENING THEN GO INTO THE SOUTHERN GREAT BASIN
TUESDAY. TUESDAY AFTERNOON WILL HAVE A SLIGHTLY BETTER (15-25
PERCENT) CHANCE OF SHOWERS AND THUNDERSTORMS THAN THIS EVENING
IN TWIN FALLS, JEROME, AND CAMAS COUNTIES AS A DEFORMATION ZONE
PASSES DIRECTLY OVER THAT AREA. WEDNESDAY SHOULD BE DRIER AGAIN.
GUSTY NORTH OR NORTHWEST WINDS 15-25 MPH WITH GUSTS TO 30 MPH
THIS AFTERNOON, AND 20-30 MPH WITH GUSTS TO 40 MPH TUESDAY
AFTERNOON, WILL CREATE PATCHY BLOWING DUST AND LOCALLY REDUCED
VISIBILITY IN THE SNAKE BASIN AND SOUTHERN MALHEUR AND HARNEY
COUNTIES. TUESDAY AND WEDNESDAY WILL ALSO BE SEVERAL DEGREES
COOLER THAN TODAY UNDER NORTHERLY FLOW ALOFT. LINGERING SURFACE
WIND TONIGHT WILL RAISE MIN TEMPS A FEW DEGREES, BUT WEDNESDAY
MORNING LOOKS 5-10 DEGREES COOLER AFTER WINDS DIE DOWN TUESDAY
EVENING.
LONG TERM /THURSDAY THROUGH MONDAY/
AN UPPER LEVEL RIDGE WILL CONTINUE TO BUILD OVER THE WESTERN UNITED
STATES THROUGH NEXT WEEK. WARM AND DRY CONDITIONS WILL CONTINUE,
WITH TEMPERATURES ABOUT 5-15 DEGREES ABOVE NORMAL THROUGH NEXT WEEK.
A WEAK SHORTWAVE TROUGH WILL MOVE THROUGH THE REGION ON SATURDAY,
COOLING TEMPERATURES OFF A FEW DEGREES AND BRINGING A 20-30% CHANCE
OF PRECIPITATION TO HIGH TERRAIN OVER THE REGION. BY SUNDAY, THE
RIDGE WILL BUILD BACK IN OVER THE REGION, BRINGING A RETURN TO WARM
TEMPERATURES OVER 80F IN THE LOWER ELEVATION VALLEYS. CURRENTLY, THE
TREASURE VALLEY WILL SEE A 30-40% CHANCE OF REACHING 90F BY NEXT
MONDAY AFTERNOON.
AVIATION /18Z MONDAY THROUGH TUESDAY/
ISSUED 1140 AM MDT MON MAY 4 2026
VFR WITH WITH MOSTLY CLEAR SKIES THROUGH THE DAY. PATCHY VALLEY
SMOKE IN THE BOISE MOUNTAINS. ISOLATED SHOWERS/THUNDERSTORMS
WILL RETURN NEAR THE NV BORDER AND HIGH TERRAIN OF SW ID IN THE
AFTERNOON/EVENING. SURFACE WINDS: W-NW 10-20 KT WITH GUSTS TO
25 KT IN THE AFTERNOON, CONTINUING OVERNIGHT. WINDS ALOFT AT 10K
FT MSL: NW-NE 15-30 KT.
KBOI...VFR WITH SOME HIGH CLOUDS INCREASING THROUGH THE DAY.
SURFACE WINDS: NW 8-13 KT WITH GUSTS UP TO 20 KT.
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
SHORT TERM...LC
LONG TERM....SA
AVIATION.....SA
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