145
FXUS65 KBOI 020900
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
300 AM MDT WED APR 2 2025
SHORT TERM...TODAY THROUGH FRIDAY NIGHT
GRADUAL WARMING AND DRYING
THROUGH FRIDAY AS THE MAIN UPPER TROUGH OVER THE INTERIOR NORTHWEST
US SLOWLY WEAKENS. SCATTERED SNOW SHOWERS OVER THE MOUNTAINS TODAY,
AND AGAIN THURSDAY IN THE CENTRAL IDAHO MOUNTAINS BUT FEWER THAN
TODAY. STILL ENOUGH INSTABILITY FOR ISOLATED THUNDERSTORMS OVER
THE MOUNTAINS LATE TODAY AND AGAIN LATE THURSDAY. HIGH TEMPS WILL
INCREASE ABOUT TWO DEGREES PER DAY WHILE LOWS HOLD GENERALLY STEADY.
WINDS WILL BE NORTHWEST THROUGH FRIDAY 5 TO 15 MPH IN THE NIGHTS
AND MORNINGS, 10 TO 20 MPH IN THE AFTERNOONS, EXCEPT 20 MPH WITH
AFTERNOON GUSTS TO 35 MPH IN THE SNAKE BASIN EAST OF BOISE.
LONG TERM...SATURDAY THROUGH WEDNESDAY
AN UPPER LEVEL RIDGE
IS EXPECTED TO BUILD ACROSS THE NORTHWEST REGION THROUGH SATURDAY,
CONTINUING A WARM AND DRY TREND OVER THE WEEKEND WITH DAYTIME
TEMPERATURES IN THE 60S AND 70S ACROSS THE VALLEYS, AND SNOW
LEVELS IN THE 5000-6000 FT RANGE OVER THE ENTIRE AREA. A
SHORTWAVE TROUGH IS EXPECTED TO MOVE INTO THE REGION ON MONDAY,
SLIGHTLY COOLING TEMPERATURES AND BRINGING SHOWERS AND CHANCE
OF THUNDERSTORMS MONDAY AFTERNOON/EVENING. SNOW LEVELS WILL BE
EXPECTED TO RISE TO 6000-7000 FT RANGE, AND SNOWFALL IS
GENERALLY NOT EXPECTED OVER THE AREA EARLY NEXT WEEK. FOLLOWING
THIS BRIEF TROUGH PASSAGE, A LONGWAVE RIDGE IS EXPECTED TO MOVE
INTO THE AREA THROUGH TUESDAY AND WEDNESDAY, RETURNING ABOVE
NORMAL TEMPERATURES AND DRIER CONDITIONS UNTIL THE END OF THE
EXTENDED FORECAST PERIOD.
AVIATION
MAINLY VFR. SCATTERED SHOWERS AFTER 02/17Z WILL CREATE
PERIODS OF MVFR/IFR, FAVORING HIGHER TERRAIN. SHOWERS WILL BE
CAPABLE OF GRAUPEL, ISOLATED LIGHTNING, AND OUTFLOW WINDS UP TO
20-30 KT. SNOW LEVELS 3K-4K FEET MSL. MOUNTAINS OBSCURED AT
TIMES. SURFACE WINDS: LIGHT AND VARIABLE, BECOMING W-NW 5-15 KT
WITH GUSTS AROUND 25 KT BY LATE MORNING. WINDS ALOFT AT 10KFT:
N-NW 10-20 KT.
KBOI...GENERALLY VFR. SHOWERS DEVELOPING THIS AFTERNOON OVER
BOISE FOOTHILLS CREATING MTN OBSCURATION. A 10% CHANCE OF MVFR
RAIN/GRAUPEL SHOWERS HITTING KBOI TERMINAL. SURFACE WINDS: LIGHT
NW, INCREASING TO NW 8-14 KT WITH GUSTS AROUND 20 KT BY THIS
AFTERNOON.
HYDROLOGY
A FLOOD WARNING CONTINUES ON THE SILVIES RIVER NEAR
BURNS/OR DUE TO SNOWMELT AND A BREACHED LEVEE, ALTHOUGH THE
RIVER ITSELF IS FORECAST TO RECEDE BELOW 12.0 FLOOD STAGE THIS
MORNING. COOL WEATHER WILL LIMIT SNOWMELT THROUGH FRIDAY, BUT
WARMER WEATHER THIS WEEKEND SHOULD INCREASE SNOWMELT AGAIN.
AFTER BRIEF COOLING MONDAY AND TUESDAY ANOTHER WARM PERIOD AND
MORE SNOWMELT IS EXPECTED NEXT WEEK.
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....JY
AVIATION.....SH
HYDROLOGY....LC
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