964
FXUS65 KBOI 042256
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
456 PM MDT SAT JUL 4 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 MONDAY 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 /TUESDAY THROUGH SATURDAY/
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 /00Z SUNDAY THROUGH MONDAY/
ISSUED 449 PM MDT SAT JUL 4 2026
VFR. HIGH DENSITY ALTITUDE THIS EVENING DUE TO HEAT. 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 KBKE TO
KONO THIS EVENING. OTHERWISE, MOSTLY VARIABLE UNDER 12 KT
TONIGHT THROUGH SUNDAY MORNING. WINDS ALOFT AT 10KFT MSL: SW
10-20 KT.
KBOI...VFR UNDER CLEAR SKIES. HIGH DENSITY ALTITUDE THIS EVENING
AND SUNDAY AFTERNOON/EVENING DUE TO HEAT. SURFACE WINDS: NW
7-12 KT, BECOMING SE OR VARIABLE LESS THAN 10 KT OVERNIGHT
THROUGH SUNDAY MORNING.
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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