327
FXUS65 KBOI 240929
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
329 AM MDT TUE MAR 24 2026
KEY MESSAGES
- NEAR RECORD TEMPERATURES CONTINUE THROUGH WEDNESDAY, WITH
VALLEY HIGHS IN THE MID 70S.
- GUSTY WINDS AND VERY DRY CONDITIONS WILL BRING ELEVATED FIRE
DANGER NEAR THE NEVADA BORDER ON TUESDAY AND WEDNESDAY
AFTERNOON.
- MOUNTAIN SHOWERS THROUGH WEDNESDAY. GUSTY WINDS WITH A COLD
FRONT PASSAGE WEDNESDAY NIGHT FOLLOWED BY BREEZY AND COOLER
CONDITIONS ON THURSDAY.
SHORT TERM /THROUGH THURSDAY NIGHT/
TODAY AND WEDNESDAY WILL BRING WELL ABOVE NORMAL TEMPERATURES AS
UPPER RIDGING DRAWS A WARMER AIR MASS NORTHWARDS. MOST LOWER
ELEVATIONS OF SE OREGON AND SW IDAHO WILL REACH INTO THE 70S
TODAY, WITH WARMER SITES APPROACHING 80. THIS COULD RESULT IN
RECORD HIGHS AT SEVERAL CLIMATE SITES IN THE REGION (SEE PNSBOI
PRODUCT FOR FURTHER DETAILS). THICKER CLOUD COVER AND THE
CHANCE FOR PRECIPITATION WILL KEEP BAKER COUNTY AND THE
W-CENTRAL IDAHO MTNS A BIT COOLER. AN APPROACHING COLD FRONT ON
WEDNESDAY WILL TAKE 5-10 DEGREES OFF HIGH TEMPERATURES ACROSS SE
OREGON, WHILE SW IDAHO HOLDS ON TO NEAR RECORD WARMTH FOR ONE
MORE DAY.
GUSTY SOUTHERLY WINDS (25-45 MPH) WILL ACCOMPANY WARM AND DRY
CONDITIONS TODAY, ESPECIALLY ACROSS OPEN RANGELAND OF SE OREGON
AND SW IDAHO SOUTH OF THE SNAKE RIVER. WHILE STILL VERY EARLY IN
THE SEASON THESE CONDITIONS, COUPLED WITH RECENT WARM AND DRY
WEATHER WILL HEIGHTEN THE FIRE DANGER ALONG THE NV BORDER.
FURTHER NORTH, BAKER COUNTY AND THE W-CENTRAL IDAHO MTNS WILL BE
ON THE PERIPHERY OF HEAVIER PRECIPITATION THAT SETS UP ALONG
THE NORTHERN EDGE OF THE UPPER RIDGE. THESE AREAS WILL SEE A
30-60% CHANCE OF SHOWERS THROUGH WEDNESDAY. TOTAL RAINFALL WILL
BE LIGHT (MOSTLY LESS THAN 0.10 INCHES), THOUGH THE GRADIENT
WILL BE TIGHT WITH MUCH HIGHER TOTALS IN THE NORTHERN WALLOWAS
AND NORTH OF THE MAIN FORK OF THE SALMON RIVER. SNOW LEVELS
DURING THE PRECIPITATION WILL BE ABOVE 8000 FEET.
A COLD FRONTAL PASSAGE WEDNESDAY NIGHT WILL BE MOSTLY DRY WITH
ONLY THE W-CENTRAL IDAHO MTNS CARRYING A 30-50% CHANCE OF
SHOWERS. EVEN WITH THE OVERNIGHT TIMING, EXPECT GUSTY WINDS TO
40 MPH ALONG THE I-84 CORRIDOR FROM BAKER CITY TO TWIN/JEROME.
THURSDAY WILL SEE GUSTY NORTHWEST WINDS ACCOMPANY A 10-25 DEGREE
DROP IN TEMPERATURES FROM WEDNESDAY.
LONG TERM /FRIDAY THROUGH TUESDAY/
MILD AND DRY WEATHER RETURNS FOR THE WEEKEND AS A LOW AMPLITUDE
RIDGE BRINGS SOUTHWEST FLOW ALOFT. TEMPERATURES WILL WARM 5-10
DEGREES THUR-FRI AND FRI-SAT, WITH A FEW MORE DEGREES ADDED ON
FOR SUNDAY. BY SUNDAY AFTERNOON HIGHS WILL AGAIN BE 10 TO 15
DEGREES ABOVE NORMAL (LOW-MID 70S IN THE VALLEYS, AROUND 60 IN
MTN VALLEYS). THERE WILL BE PERIODS OF CLOUD COVER ACCOMPANYING
THE WARMING TEMPERATURES, BUT OTHERWISE IT'S DRY. MONDAY WILL
SEE PRECIPITATION CHANCES INCREASE OVER THE MTNS AS AN UPPER
TROUGH APPROACHES THE PAC NW. OPERATIONAL AND AI SOLUTIONS SHOW
THE TROUGH ADVANCING INTO THE PAC NW ON TUESDAY WITH INCREASING
CHANCES OF PRECIPITATION OVER THE REGION. A 15-30% CHANCE OF
SHOWERS OVER THE MTNS ON MONDAY, OVERSPREADS THE ENTIRE AREA BY
TUESDAY AFTERNOON. TEMPERATURES WILL COOL SOME HEADING INTO
NEXT WEEK, BUT LIKELY REMAIN AT OR ABOVE NORMAL.
AVIATION /06Z TUESDAY THROUGH WEDNESDAY/
ISSUED 1206 AM MDT TUE MAR 24 2026
VFR. ISOLATED TO SCATTERED RAIN SHOWERS BEGINNING TUESDAY
MORNING, WITH AREAS OF MOUNTAIN OBSCURATION NORTH OF KBNO-KONO-
KSUN. VARIABLE SURFACE WINDS UP TO 10 KT TONIGHT, BECOMING SW-
SE 10-20 KT TUESDAY AFTERNOON WITH GUSTS UP TO 30KT IN EASTERN
OR. WINDS ALOFT AT 10 KFT: W-SW 25-40 KT INCREASING TO W-SW
35-50KT BY 21Z/TUESDAY.
KBOI...VFR. ISOLATED RAIN SHOWERS POSSIBLE (5-10% CHANCE) TUESDAY
MORNING. SURFACE WINDS SE 5-10KT.
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....DG
AVIATION.....CH
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