540
FXUS65 KBOI 282131
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
231 PM MST SAT FEB 28 2026
SHORT TERM...TONIGHT THROUGH MONDAY NIGHT
PACIFIC SYSTEM WILL
MOVE ENE-WARD ACROSS OUR SOUTHERN ZONES TONIGHT AND SUNDAY WITH
SCATTERED SHOWERS (20-40% COVERAGE), WEAKENING AS IT MOVES AWAY
FROM MAIN UPPER LOW NEAR 40/135. WE ALSO HAVE ISOLATED THUNDER-
STORMS (10% COVERAGE) NEAR THE NEVADA BORDER THIS EVENING.
SHOWERS WILL INCREASE IN THE SOUTHERN HALF OF OUR CWA SUNDAY
NIGHT AND MONDAY AS THE MAIN UPPER LOW COMES INLAND THROUGH
NORTHERN CALIFORNIA AND ACROSS NORTHERN NEVADA. SNOW LEVELS
WILL STAY ABOVE 7000 FEET MSL IN SOUTHERN AREAS (WHERE THE PCPN
IS). TEMPS WILL STAY MILD, MORE LIKE MID-APRIL THAN EARLY MARCH.
MONDAY WILL BE THE WARMEST DAY IN THE SHORT TERM WITH HIGHS 60
TO 65 IN THE TREASURE VALLEY AND SOUTHERN MALHEUR COUNTY. MONDAY
NIGHT WILL BE 8-14 DEGREES COOLER THAN THE PREVIOUS NIGHTS
UNDER CLEARING SKIES. WINDS WILL BE LIGHT AND VARIABLE THROUGH
MONDAY MORNING EXCEPT 20-30 MPH OUTFLOW GUSTS FROM STRONGER
SHOWERS. WINDS WILL BECOME WEST-NORTHWEST 10-15 MPH LATER MONDAY
BEHIND THE DEPARTING SYSTEM.
LONG TERM...TUESDAY THROUGH SATURDAY
TUESDAY WILL BE DRY AND
CLEAR WITH TEMPERATURES ABOUT 10 DEGREES ABOVE NORMAL. THE
UPPER LEVEL RIDGE RESPONSIBLE WILL QUICKLY MOVE EAST BY TUESDAY
NIGHT. CLOUDS INCREASE AHEAD OF AN APPROACHING TROUGH AND COLD
FRONT. THE FRONTAL PASSAGE REDUCES SNOW LEVELS TO 3500-4500 FT
MSL BY THURSDAY MORNING, WITH WIDESPREAD PRECIPITATION EXPECTED
LATE WEDNESDAY MORNING THROUGH THE EVENING. SCATTERED
PRECIPITATION CONTINUES WEDNESDAY NIGHT THROUGH THURSDAY AS THE
MOIST NORTHWESTERLY FLOW BEHIND THE FRONTAL REMAINS UNSETTLED.
BUILDING HIGH PRESSURE IN THE NORTH PACIFIC STEADILY DECREASES
PRECIPITATION CHANCES EACH DAY.
AVIATION
VFR AND OVERCAST. CLOUDS AND SHOWERS CONTINUE TO DEVELOP
ACROSS SE OR AND SW ID THROUGH THIS EVENING. AS PRECIPITATION
INCREASES EXPECT SNOW LEVELS TO RISE TO 7-8 KFT MSL, CEILINGS
DROPPING TO LOW VFR-MVFR, AND A 10% CHANCE OF LIGHTNING NEAR THE
NV BORDER THIS AFTERNOON. SURFACE WINDS: VARIABLE 5-15 KT.
WINDS ALOFT AT 10KFT MSL: W-SW 15-25 KT.
KBOI...VFR AND A LESS THAN 10% CHANCE OF PRECIPITATION THIS
AFTERNOON. WIND STAYS LIGHT AND VARIABLE, FAVORING NW THIS AFTERNOON.
SUNDAY OUTLOOK...SHOWERS EXPANDING NORTHWARD SUNDAY. MVFR-IFR
DEVELOPING IN MTN SNOW AND HEAVIER RAIN SHOWERS WITH SNOW LEVELS
6-8 KFT MSL. ANOTHER 10% CHANCE OF AFTERNOON LIGHTNING IN SE OR
AND ALONG THE NV-ID BORDER. SURFACE WINDS: SW-SE 5-15 KT, GUSTS
UP TO 30 KT WITH STORMS.
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...LC
LONG TERM....JM
AVIATION.....JM
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