529
FXUS65 KBOI 141132
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
532 AM MDT SAT MAR 14 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- STRONG, LOCALLY DAMAGING, WINDS TODAY ALONG AND BEHIND A COLD
FRONT. STRONGEST WINDS ARE EXPECTED IN THE CENTRAL SNAKE RIVER
BASIN AND SOUTH TO THE IDAHO/NEVADA BORDER.
- MUCH COLDER TONIGHT AND SUNDAY, WITH SUB-FREEZING LOW
TEMPERATURES IN ALL AREAS, THEN RAPID WARMING MONDAY.
- AN EARLY SEASON HEAT WAVE WILL BRING RECORD HIGH TEMPERATURES
AREA-WIDE TUESDAY THROUGH FRIDAY.
SHORT TERM /THROUGH MONDAY NIGHT/
ISSUED 339 AM MDT SAT MAR 14 2026
A COLD FRONT, SUPPORTED BY A VERY STRONG IMPULSE ALOFT FROM THE
NORTH PACIFIC, WILL PASS THROUGH OUR CWA TODAY. STRONG OR EVEN
DAMAGING WINDS ARE EXPECTED ALONG AND BEHIND THE FRONT AS IT
PASSES THROUGH EASTERN OREGON LATE MORNING AND WESTERN IDAHO
MIDDAY AND EARLY AFTERNOON. STRONGEST WINDS ARE EXPECTED THIS
AFTERNOON AND EARLY EVENING IN THE SNAKE RIVER BASIN EAST OF
BOISE AND SOUTH TO THE IDAHO/NEVADA BORDER WHERE SUSTAINED
WEST/NORTHWEST WINDS WILL REACH 30 TO 40 MPH WITH GUSTS 50 TO
60 MPH. ALL OTHER ZONES IN OUR CWA WILL BE UNDER A WIND ADVISORY
FOR SUSTAINED WINDS 25 TO 35 MPH AND GUSTS TO 50 MPH. THE
SOUTHWEST IDAHO HIGHLANDS WAS ADDED TO HIGH WIND WARNING. THE
BOISE MOUNTAINS, WEST CENTRAL IDAHO MOUNTAINS, AND UPPER WEISER
RIVER ZONES WERE ADDED TO THE ADVISORY FOR SPORADIC WINDS STRONG
ENOUGH TO BLOW DOWN TREES DURING HEAVY RAIN SHOWERS WITH THE
COLD-FRONTAL PASSAGE. BRIEF BUT HEAVY RAIN AND SNOW SHOWERS ARE
EXPECTED IN NORTHERN AREAS, BUT EVEN SOUTHERN AREAS WILL HAVE
RAIN SHOWERS FOR AN HOUR OR TWO AS THE FRONT PASSES.
MUCH COLDER AIR WILL COME IN BEHIND THE COLD FRONT TONIGHT THROUGH
SUNDAY. THE SNOW LEVEL WILL LOWER ALL THE WAY TO VALLEY FLOORS
OVERNIGHT BUT BY THEN MOST OF THE SHOWERS WILL HAVE ENDED.
LIGHT SNOW SHOWERS OR FLURRIES WILL LINGER ONLY IN THE CENTRAL
IDAHO MOUNTAINS.
THE COLD WEATHER WILL BE BRIEF, WITH THE UPPER TROUGH EXITING
RAPIDLY SOUTHEAST SUNDAY EVENING AND REPLACED BY AN UPPER RIDGE
BUILDING INLAND ACROSS THE WESTERN US. THIS RIDGE WILL BRING
RAPID WARMING TO OUR CWA BEGINNING SUNDAY NIGHT AND CONTINUING
MONDAY LEADING TO RECORD HIGH TEMPERATURES AS EARLY AS TUESDAY.
A WARM FRONT LATE SUNDAY NIGHT/ MONDAY MORNING WILL BRING 1-2
INCHES OF SNOW TO NORTHERN MOUNTAINS, CLEARING LATER MONDAY.
LONG TERM /TUESDAY THROUGH SATURDAY/
ISSUED 339 AM MDT SAT MAR 14 2026
THE LONG TERM IS CONSISTENTLY HOT AND DRY AS STRONG UPPER LEVEL
RIDGE BRINGS AN EARLY HEAT WAVE. TUESDAY WILL BE 15 TO 20
DEGREES ABOVE NORMAL, AS FOLLOWING DAYS RISE TO 20 TO 25 DEGREES
ABOVE NORMAL. LOCATIONS IN THE VALLEYS WILL SEE AFTERNOON HIGH
TEMPERATURES IN THE UPPER 70S TO LOW 80S. TEMPERATURES IN DESERT
HIGHLANDS WILL BE A FEW DEGREES COOLER, AND MUCH COOLER IN THE
MOUNTAINS OF CENTRAL IDAHO DOWN TO THE UPPER 50S AND LOWER 60S.
IN FACT, SOME PARTS OF THE SNAKE RIVER CANYON WILL SEE AFTERNOON
TEMPERATURES APPROACHING THE 90 DEGREE MARK LATE IN THE WEEK.
DAILY HIGH TEMPERATURE RECORDS WILL BE THREATENED AT ALL SITES
EACH DAY IN THE LONG TERM. NOT ONLY WILL WE THREATEN DAILY
RECORDS, BUT WE WILL ALSO CHALLENGE THE WARMEST MAXIMUM
TEMPERATURES EVER RECORDED FOR THE MONTH OF MARCH. WE MAY EVEN
SEE OUR EARLIEST 80 DEGREE DAY IN BOISE. FOR HISTORICAL CONTEXT,
THE WARMEST DAY IN MARCH FOR BOISE, IDAHO, WAS 82 DEGREES SET
ON MARCH 26TH 1877, AND THE EARLIEST 80 DEGREE DAY WAS MARCH
19TH 1997. WINDS REMAIN MILD, AND SKIES WILL STAY PARTLY CLOUDY.
AFTERNOON RELATIVE HUMIDITY VALUES ARE EXPECTED TO RANGE FROM
20 TO 30% IN THE LOWLANDS AND 30 TO 50% IN THE MOUNTAINS.
AVIATION /12Z SATURDAY THROUGH SUNDAY/
ISSUED 530 AM MDT SAT MAR 14 2026
A COLD FRONT WILL BRING A BAND OF SHOWERS, MOVING FROM NW-SE
THIS MORNING. THE FRONT EXITS THE AREA MID-DAY. LOCALIZED MVFR
CONDITIONS IN PRECIP, HEAVIER PRECIP RATES POSSIBLE IN MOUNTAINS.
SCATTERED SHOWERS REMAIN THIS AFTERNOON BEHIND THE FRONT. LLWS
AHEAD OF THE COLD FRONT. LESS THAN A 10% CHANCE OF LIGHTNING IN
SHOWERS ALONG THE FRONT. SNOW LEVELS: 5-6 KFT MSL LOWERING TO
VALLEY FLOORS BEHIND THE FRONT THIS EVENING. SURFACE WINDS:
BECOMING W-NW 15-30 KT WITH GUSTS TO 25-50 KT STRONGEST NEAR
KTWF/KJER. WINDS ALOFT AT 10KFT MSL: W 35-55 KT
KBOI...LLWS THIS MORNING AHEAD OF A COLD FRONT. LIGHT TO
MODERATE RAIN IN SHOWERS ALONG THE FRONT, CLEARING BY THIS
AFTERNOON AS POST-FRONTAL WINDS INCREASE TO NW 20-30 KT WITH
GUSTS UP TO 40 KT. CLEARING THIS EVENING AS WINDS CALM.
SUNDAY OUTLOOK...VFR UNDER MID-HIGH CLOUDS. CEILINGS LOWERING
AND SHOWERS RETURNING TO NE OREGON AND THE CENTRAL ID MTNS LATE
SUN/PM. SURFACE WINDS: W-NW 5-15 KT.
BOI WATCHES/WARNINGS/ADVISORIES
ID...WIND ADVISORY FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR
IDZ011>013-029-033.
HIGH WIND WARNING FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR
IDZ014>016-028-030.
OR...WIND ADVISORY FROM NOON MDT /11 AM PDT/ TODAY TO 9 PM MDT /8
PM PDT/ THIS EVENING FOR ORZ061>064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....JM
SHORT TERM...LC
LONG TERM....JM
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