567
FXUS65 KBOI 171109
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
ISSUED BY NATIONAL WEATHER SERVICE SALT LAKE CITY UT
509 AM MDT THU JUL 17 2025
SHORT TERM...TODAY THROUGH SATURDAY NIGHT
TODAY AND FRIDAY,
AN UPPER LEVEL RIDGE OVER THE SOUTHWESTERN US WILL SHIFT TO THE NORTH.
THIS WILL BRING HOTTER TEMPERATURES, WITH HIGHS AROUND 5
DEGREES ABOVE NORMAL. THIS WILL PLACE HIGH TEMPERATURES IN THE
LOWER VALLEYS IN THE MID 90S TO AROUND 100 DEGREES.. AN UPTICK
IN MID-LEVEL MOISTURE WILL ACCOMPANY THIS PATTERN AS THE FLOW
ALOFT BECOMES MORE SOUTHWESTERLY. THIS WILL BRING A 20% CHANCE
OF SHOWERS AND THUNDERSTORMS TO THE HIGHER TERRAIN ALONG THE
ID/NV BORDER EACH AFTERNOON AND EVENING, WITH LESSER CHANCES
(10% OR LOWER) ELSEWHERE. STORMS MAY PRODUCE GUSTY WINDS 40-50
MPH. MEANWHILE, AN UPPER LEVEL TROUGH OVER THE PACIFIC NORTHWEST
WILL START TO MOVE INLAND ON SATURDAY. THIS WILL BRING A FEW
DEGREES OF COOLING TO THE AREA. THE TROUGH WILL ENHANCE WEST TO
SOUTHWEST FLOW ALOFT TODAY THROUGH SATURDAY, ALLOWING BREEZY
CONDITIONS WITH GUSTS 15-30 MPH, HIGHEST ACROSS THE CENTRAL ID
MOUNTAINS, TO DEVELOP EACH AFTERNOON AS WINDS ALOFT MIX DOWN TO
THE SURFACE. REGIONAL FIRES WILL CONTINUE TO SEND SMOKE INTO OUR
AREA AT TIMES OVER THE NEXT COUPLE OF DAYS.
LONG TERM...SUNDAY THROUGH THURSDAY
THE UPPER LEVEL TROUGH
WILL PERSIST OVER THE PACIFIC NORTHWEST EARLY NEXT WEEK, THEN
SLOWLY MOVE EAST BY THE MIDDLE OF NEXT WEEK. THIS WILL BRING
TEMPERATURES A FEW DEGREES BELOW NORMAL, WARMING BACK TO NEAR
NORMAL BY THURSDAY. THE CORE OF THE TROUGH AND MOST ACCOMPANYING
PRECIPITATION SHOULD REMAIN TO OUR NORTH, BUT A SLIGHT CHANCE
(15-25%) OF SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER NORTHERN
AREAS MONDAY AND TUESDAY, WITH LOWER CHANCES SOUTH. THE TROUGH
WILL KEEP AFTERNOON WINDS BREEZY THROUGH THE PERIOD.
AVIATION
MAINLY VFR. PATCHY SMOKE, MAINLY ALOFT. SMOKE IN SE OREGON
MAY RESULT IN BRIEF MVFR CONDITIONS THIS MORNING AT KBNO. HIGH
DENSITY ALTITUDE DUE TO HOT AFTERNOON TEMPERATURES. ISOLATED
THUNDERSTORMS ALONG THE ID-NV BORDER AND NEAR KTWF THIS
AFTERNOON AND EARLY EVENING. GUSTS UP TO 40 KT POSSIBLE NEAR
STORMS. SURFACE WINDS: LIGHT AND VARIABLE EARLY THIS MORNING,
BECOMING W-NW 5-15 KT THIS AFTERNOON WITH GUSTS TO 25 KT ACROSS
THE CENTRAL ID MOUNTAINS. WINDS ALOFT AT 10KFT MSL: W 15-25 KT.
KBOI...VFR AND CLEAR. SMOKE ALOFT POSSIBLE THIS MORNING, BUT UNLIKELY TO
LOWER TO MVFR CONDITIONS. SURFACE WINDS: SE 3-8 KT THIS
MORNING, THEN NW 8-12 KT WITH GUSTS 15-20 KT THIS AFTERNOON.
WEEKEND OUTLOOK…ISOLATED THUNDERSTORMS ALONG ID/NV BORDER FRIDAY
AFTERNOON. OTHERWISE, MOSTLY CLEAR EXCEPT FOR OCCASIONAL SMOKE.
SURFACE WINDS: W-NW 5-15 KT, WITH AFTERNOON GUSTS 15-25 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...ST
LONG TERM....ST
AVIATION.....ST
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