430
FXUS65 KBOI 081958
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
158 PM MDT FRI MAY 8 2026
KEY MESSAGES
- WARM AND DRY SATURDAY, TURNING HOTTER SUNDAY AS LOWER
ELEVATIONS COULD SEE FIRST 90 DEGREE DAY OF THE YEAR.
- HEAT PEAKS ON TUESDAY WITH TEMPERATURES 15-25 DEGREES ABOVE
NORMAL. LOWER ELEVATIONS WILL REACH THE LOW-MID 90S.
- NOT AS HOT WITH A SLIGHT CHANCE OF PRECIPITATION IN THE
MOUNTAINS STARTING WEDNESDAY.
SHORT TERM /THROUGH SUNDAY NIGHT/
SEEING SOME BANDS OF MOSTLY HIGH CLOUDS AHEAD OF AN UPPER
TROUGH MOVING INTO THE PAC NW THIS AFTERNOON. DRY CONDITIONS
WILL ACCOMPANY THE TROUGH AND A SURFACE FRONT AS IT CROSSES THE
REGION TONIGHT. THE FRONT WILL PUSH THROUGH SE OREGON THIS
EVENING, BRINGING WIND GUSTS TO 35 MPH IN THE TYPICALLY WINDIER
SPOTS OF NORTHERN MALHEUR AND BAKER COUNTIES. THE FRONT AND
WINDS WILL WORK THROUGH THE LOWER-MIDDLE SNAKE PLAIN OVERNIGHT,
KEEPING IT BREEZY AS WINDS GUST TO 30 MPH. SATURDAY WILL BE THE
COOLEST DAY FOR MOST SITES AS THE SHORTWAVE TROUGH MOVES EAST
AND AN UPPER RIDGE AMPLIFIES OVER CENTRAL OR/WA. THE WARM AIR
MASS UNDER THE BUILDING RIDGE WILL SHIFT INTO OUR REGION ON
SUNDAY, BRINGING AN ABRUPT WARMUP. AS WINDS BECOME EASTERLY,
HIGH TEMPERATURES ON SUNDAY WILL PUSH TO 15-20 DEGREES ABOVE
NORMAL. THIS WILL PUT LOWER ELEVATION SITES NEAR 90 AND MOUNTAIN
VALLEYS INTO THE UPPER 70S.
LONG TERM /MONDAY THROUGH FRIDAY/
NEAR RECORD TEMPERATURES ARE ANTICIPATED THIS COMING WEEK, AS
HIGH PRESSURE BUILDS IN OVER THE WESTERN UNITED STATES. THE
WARMEST DAY OF THE WEEK (AND SO FAR THIS YEAR) LOOKS TO COME
TUESDAY, WITH TEMPERATURES PUSHING 25 DEGREES ABOVE NORMAL. IT
IS WORTH MENTIONING THAT WATER TEMPERATURES WILL STILL BE
RUNNING COLD, SO CONSIDER TAKING EXTRA PRECAUTIONS IF
PARTICIPATING IN WATER RECREATION.
THE PATTERN BECOMES LESS CERTAIN IN IT'S PROGRESSION AFTER
WEDNESDAY. THE BULK OF THE UNCERTAINTY LIES IN THE PROGRESSION
OF AN UPPER-LEVEL TROUGH, AND WHETHER OR NOT IT CLOSES OFF
INTO A LOW OFF THE COAST OF CALIFORNIA, OR STAYS IN THE FLOW
ALOFT AND CROSSES OUR AREA. IN EITHER CASE, A SOUTHERLY PUSH OF
MOISTURE WILL LEAD TO SLIGHT CHANCES OF PRECIPITATION AND
PERHAPS EVEN SOME THUNDER OVER HIGHER TERRAIN COME
WEDNESDAY/THURSDAY. TEMPERATURES WILL BEGIN TO TREND COOLER
BEYOND TUESDAY, BECOMING MORE SEASONABLE BY FRIDAY.
AVIATION /18Z FRIDAY THROUGH SATURDAY/
ISSUED 1110 AM MDT FRI MAY 8 2026
VFR. SURFACE WINDS: W-NW 10-20 KT WITH GUSTS TO 20-30 KT THIS
AFTERNOON, STRONGEST NEAR KTWF/KJER. THEN VARIABLE 5-10 KT
OVERNIGHT, EXCEPT W-SW 10-15 KT WITH GUSTS TO 20-25 KT NEAR
KTWF/KJER. WINDS ALOFT AT 10KFT MSL: W-NW 10-20KT.
KBOI...VFR. SURFACE WINDS: NW 8-12 KT WITH GUSTS TO 20 KT THIS
AFTERNOON. THEN NW 5-10 KT OVERNIGHT.
WEEKEND OUTLOOK...VFR. SURFACE WINDS W-NW 5-10KT WITH GUSTS UP
TO 25 KT NEAR KMUO/KTWF/KJER SATURDAY AFTERNOON/EVENING,
BECOMING SW-SE 5- 15KT SUNDAY. A COLD FRONT LATE SUNDAY WILL
RETURN NW GUSTS OF 20-30 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...DG
LONG TERM....NF
AVIATION.....NF
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