680
FXUS65 KBOI 102352
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
552 PM MDT SUN MAY 10 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- BREEZY AND SLIGHTLY COOLER MONDAY.
- VERY HOT TUESDAY. RECORD HIGH TEMPERATURES IN THE MID TO
UPPER 90S IN THE LOWER VALLEYS.
- COOLER BEGINNING WEDNESDAY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS.
SHORT TERM /THROUGH TUESDAY NIGHT/
ISSUED 225 PM MDT SUN MAY 10 2026
WARM, DRY WEATHER TODAY UNDER BROAD UPPER RIDGE. A DRY COLD
FRONT TO OUR NORTHWEST WILL PASS THROUGH EASTERN OR THIS EVENING
AND WESTERN ID OVERNIGHT, MARKED BY INCREASING MID AND HIGH
CLOUDS AND A WIND SHIFT TO WEST/NORTHWEST. PRE-FRONTAL SOUTH OR
EAST WINDS WILL KEEP TONIGHT WARMER THAN LAST NIGHT, BUT MONDAY
SHOULD BE SLIGHTLY COOLER THAN TODAY AND MONDAY NIGHT COOLER
THAN TONIGHT. POST-FRONTAL WEST/NORTHWEST WINDS WILL INCREASE
TO 15 TO 25 MPH ON THE IDAHO SIDE MONDAY, WITH AFTERNOON GUSTS
TO 30 MPH. THE SUPPORTING UPPER LEVEL SHORT WAVE TROUGH WILL
FLATTEN THE MAIN RIDGE MONDAY, BUT AFTER IT EXITS TO OUR EAST
THE RIDGE WILL REBUILD TO EVEN GREATER AMPLITUDE AS IT PASSES
OVER OUR AREA ON TUESDAY. THAT MEANS RECORD HIGH TEMPERATURES
TUESDAY, BUT NOT QUITE AS HOT AS FORECAST YESTERDAY.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
ISSUED 225 PM MDT SUN MAY 10 2026
AN UPPER TROUGH WILL APPROACH THE REGION ON WEDNESDAY WITH
SOUTHERLY FLOW OVER THE AREA. SUBTROPICAL MOISTURE WILL MOVE
NORTHWARD FROM BAJA ON WEDNESDAY, WITH PRECIPITABLE WATER VALUES
REACHING THE 90TH PERCENTILE. THIS COMBINED WITH THE TROUGH
MOVING INLAND WILL TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS
ON WEDNESDAY AFTERNOON AND EVENING. SHEAR VALUES ARE SUFFICIENT
TOO FOR A SEVERE WEATHER THREAT WITH ORGANIZED STRONG STORMS
POSSIBLE. THE TROUGH MOVES INLAND OVER SOUTHEAST OR AND
SOUTHWEST ID ON THURSDAY WITH A CONTINUED CHANCE OF SHOWERS AND
THUNDERSTORMS. MODEL GUIDANCE SHOWS ZONAL FLOW OR WEAK TROUGHING
OVER THE AREA FRIDAY THROUGH THE WEEKEND WITH GENERALLY DRY
CONDITIONS. TEMPERATURES EXPECTED TO BE WELL ABOVE NORMAL
AGAIN ON WEDNESDAY WITH LOWER VALLEYS REACHING INTO THE 90S.
TEMPERATURES WILL TREND DOWN AROUND 10 DEGREES THURSDAY, THEN
COOL TO AROUND SEASON NORMALS BY THE WEEKEND.
AVIATION /00Z MONDAY THROUGH TUESDAY/
ISSUED 529 PM MDT SUN MAY 10 2026
VFR WITH AREAS OF HIGH CEILINGS OVERNIGHT. SURFACE WINDS: S-SE
SHIFTING TO NW WITH GUSTS 25-40 KT BETWEEN 00-03Z ACROSS SE
OREGON AND AFTER 03Z IN SW IDAHO WITH GUSTS 20-30 KT. WINDS
ALOFT 10KFT MSL: W-SW 15-25 KT.
KBOI...VFR. SE WINDS SHIFTING TO THE NW LATE THIS EVENING.
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.....DG
SHORT TERM...LC
LONG TERM....TL
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