890
FXUS65 KBOI 050620
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1220 AM MDT SUN JUL 5 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- HOT WEATHER WILL CONTINUE THROUGH MONDAY FOLLOWED BY SLIGHT
COOLING MIDWEEK, THEN TRENDING HOTTER AGAIN BEGINNING FRIDAY,
BECOMING EXTREMELY HOT NEXT WEEKEND.
- ISOLATED THUNDERSTORMS OVER HIGHER TERRAIN IN EASTERN OREGON
SUNDAY AFTERNOON AND NIGHT, SPREADING INTO WESTERN IDAHO MONDAY,
THEN ENDING WEST TO EAST TUESDAY.
- BREEZY WINDS EACH AFTERNOON.
SHORT TERM /THROUGH TUESDAY NIGHT/
ISSUED 217 PM MDT SAT JUL 4 2026
HOT WEATHER WILL PEAK SUNDAY AND MONDAY AS WESTERLY FLOW
ALOFT BACKS TO SOUTHWESTERLY. THE INCREASING SOUTHERLY
COMPONENT WILL GRADUALLY DRAW MID-LEVEL MOISTURE NORTHWARD
INTO OUR CWA, RESULTING IN ISOLATED THUNDERSTORMS SUNDAY
AFTERNOON IN HARNEY COUNTY, THEN OVER THE REST OF EASTERN
OREGON SUNDAY NIGHT THROUGH MONDAY NIGHT. A SLIGHT CHANCE
OF THUNDERSTORMS WILL DEVELOP IN WESTERN IDAHO MONDAY
AFTERNOON AND MONDAY NIGHT. DUE TO LOW-LEVEL DRYNESS,
LIGHTNING AND GUSTY OUTFLOW WINDS TO 50 MPH WILL BE THE
PRIMARY THUNDERSTORM THREATS. OUTSIDE OF THUNDERSTORMS, EXPECT
BREEZY CONDITIONS IN EASTERN OREGON THIS EVENING WITH GUSTS
20-35 MPH, WITH SIMILAR GUSTS SUNDAY AFTERNOON BUT IN IDAHO AS
WELL.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
ISSUED 217 PM MDT SAT JUL 4 2026
OVER THE FOUR CORNERS REGION WITH CONTINUED HOT TEMPERATURES
AND SOUTHWEST FLOW OVER THE AREA. RESIDUAL MONSOON MOISTURE
CONTINUES INTO TUESDAY WITH A CHANCE OF THUNDERSTORMS AS A
SHORTWAVE MOVES ACROSS THE PACIFIC NW. WESTERLY FLOW SHUNTS THE
MOISTURE TO THE EAST ON WEDNESDAY AND THURSDAY WITH DRY AND
BREEZY CONDITIONS AND SLIGHTLY COOLER TEMPERATURES. TEMPERATURES
TUESDAY AND WEDNESDAY AROUND 5-10 DEGREES ABOVE NORMAL COOLING
TO NEAR NORMAL ON THURSDAY. THE RIDGE EXPANDS OVER THE AREA ON
FRIDAY BRINGING HOTTER TEMPERATURES FOR NEXT WEEKEND.
AVIATION /06Z SUNDAY THROUGH MONDAY/
ISSUED 1219 AM MDT SUN JUL 5 2026
VFR. ISOLATED THUNDERSTORMS OVER SE OREGON, FAR SW IDAHO, AND
THE CENTRAL IDAHO MOUNTAINS SUNDAY LATE AFTERNOON AND EVENING.
THUNDERSTORMS CAPABLE OF PRODUCING GUSTY OUTFLOWS UP TO 50 KT.
HIGH DENSITY ALTITUDE SUNDAY AFTERNOON/EVENING DUE TO HEAT.
SURFACE WINDS: SW-NW 5-15 KT THIS EVENING. NW VALLEY GUSTS 15-25
KT FROM KBKE TO KONO THIS EVENING. OTHERWISE, MOSTLY VARIABLE
UNDER 12 KT OVERNIGHT THROUGH SUNDAY MORNING. WINDS ALOFT AT
10KFT MSL: SW 10-20 KT.
KBOI...VFR UNDER CLEAR SKIES OVERNIGHT THROUGH MORNING. HIGH
DENSITY ALTITUDE SUNDAY AFTERNOON/EVENING DUE TO HEAT. SURFACE
WINDS: SE OR VARIABLE LESS THAN 10 KT OVERNIGHT THROUGH SUNDAY
MORNING, BECOMING NW 7-12 KT WITH GUSTS UP TO 20 KT IN THE
AFTERNOON.
BOI WATCHES/WARNINGS/ADVISORIES
ID...NONE.
OR...
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....JY
SHORT TERM...LC
LONG TERM....KA
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