261
FXUS65 KBOI 220915
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
315 AM MDT SUN MAR 22 2026
KEY MESSAGES
- WARM, SLIGHTLY ABOVE NORMAL TEMPERATURES AND DRY CONDITIONS WILL
CONTINUE THROUGH THE MIDDLE OF NEXT WEEK.
- ANOTHER COLD FRONT WILL MOVE THROUGH THE REGION MIDWEEK,
BRINGING MOUNTAIN SHOWERS AND SLIGHTLY COOLER TEMPERATURES.
SHORT TERM /THROUGH TUESDAY NIGHT/
LIGHTER WINDS AND COOLER TEMPERATURES ARE EXPECTED TODAY,
ESPECIALLY COMPARED TO THE RECORD SHATTERING TEMPERATURES LAST
WEEK. VALLEY HIGHS WILL REACH THE LOW 60S, STILL 3-5 DEGREES
ABOVE NORMAL FOR THIS TIME OF YEAR. DRY AND PARTLY CLOUDY SKIES
WILL CONTINUE AS A RIDGE OF HIGH PRESSURE BUILDS BACK IN OVER
THE REGION THROUGH MONDAY. TEMPERATURES WILL CLIMB TO 10-15
DEGREES ABOVE NORMAL ON MONDAY AND TUESDAY, PEAKING ON TUESDAY
AHEAD OF ANOTHER WEEK FRONTAL PASSAGE. LATE TUESDAY, AN
ATMOSPHERIC RIVER WILL MOVE INTO THE PACIFIC NORTHWEST. THIS
WILL INCREASE CHANCES OF SHOWERS (30-50%) AND COOL TEMPERATURES
SLIGHTLY ACROSS HIGH ELEVATIONS IN SOUTHEAST OREGON AND IN THE
WEST CENTRAL ID MOUNTAINS. MODELS REMAIN CONSISTENT IN THE
NORTHWARD PROGRESSION OF THE BULK OF THE MOISTURE, SO CONFIDENCE
IS LOW IN ANY MEANINGFUL SHIFT TO THE WEATHER IN AREA VALLEYS
DURING THE SHORT TERM PERIOD.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
THE GULF OF ALASKA UPPER-LEVEL TROUGH WILL CONTINUE TO CAUSE
PRECIPITATION CHANCES AND GUSTY WINDS UNTIL LATE WEDNESDAY/EARLY
THURSDAY. AN EMBEDDED UPPER-LEVEL SHORTWAVE WILL MOVE A COLD
FRONT THROUGH THE AREA WEDNESDAY AFTERNOON INTO EVENING, WITH
PRECIPITATION CHANCES (30-50%) LIMITED TO HIGHER ELEVATIONS IN
OUR NORTHERN ZONES. SNOW LEVELS START AROUND 8000 FT MSL WHEN
PRECIPITATION BEGINS, BEFORE LOWERING TO NEAR 3000 FT MSL BY
PRECIPITATION ENDING. BEGINNING THURSDAY, THE UPPER-LEVEL RIDGE
LOOKS TO REBUILD OVER THE WESTERN CONUS AND BRING TEMPERATURES
ABOVE NORMAL AGAIN (WITH TEMPS 5-10 DEGREES ABOVE AVERAGE BY
SATURDAY). BY SUNDAY, ONE CLUSTER SOLUTION AND SOME
DETERMINISTIC MODEL RUNS HINT AT AN UPPER-LEVEL TROUGH MOVING
ONSHORE INTO THE PACIFIC NW, BRINGING PRECIPITATION AND COOLER
TEMPERATURES.
AVIATION /06Z SUNDAY THROUGH MONDAY/
ISSUED 1120 PM MDT SAT MAR 21 2026
VFR CONDITIONS WITH SCATTERED HIGH CLOUD COVERAGE OVERNIGHT.
WINDS WILL BE NW 10 KT OR LESS OVERNIGHT THROUGH SUNDAY MORNING,
EXCEPT 10-15 KT WITH GUSTS TO 25 KT OVER KMUO, KTWF, AND KJER.
WINDS ALOFT AT 10K FEET: W 30-40 KT.
KBOI...VFR. SURFACE WINDS W-NW 10 KT OR LESS OVERNIGHT THROUGH
THE AFTERNOON.
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...SA
LONG TERM....CH
AVIATION.....JY
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