939
FXUS65 KBOI 282044
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
244 PM MDT FRI MAR 28 2025
SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT
A WEAK SHORTWAVE WILL
TRACK ACROSS EAST OR INTO SOUTHWEST ID THIS AFTERNOON, AND WILL
LINGER OVER THE CENTRAL ID MOUNTAINS INTO TONIGHT. THIS WILL BRING
LIGHT RAIN AND SNOW TO THE AREA, WITH SNOW LEVELS REMAINING AROUND
5000-6000' MSL. AS THE MAIN WAVE MOVES EAST THIS AFTERNOON, SOME
PARTIAL CLEARING THIS AFTERNOON WILL DESTABILIZE THE ATMOSPHERE,
WITH SCATTERED SHOWERS DEVELOPING THIS AFTERNOON AND EVENING ACROSS
EASTERN OR AND SOUTHWEST ID FROM THE SNAKE BASIN SOUTH. SOME OF THE
SHOWERS MAY PRODUCE THUNDER, GRAUPEL AND GUSTY WINDS UP TO 35 MPH
DURING THE AFTERNOON AND EVENING. CONDITIONS START TO DRY OUT MIDDAY
SATURDAY LASTING INTO SUNDAY. NEXT SYSTEM ARRIVES LATE SUNDAY INTO
MONDAY WITH PRECIPITATION BECOMING WIDESPREAD LATE SUNDAY NIGHT INTO
MONDAY MORNING. SNOW LEVELS LINGER AROUND 4000-5500' MSL WITH THIS
SYSTEM.
LONG TERM...MONDAY THROUGH FRIDAY
A LARGE UPPER LEVEL TROUGH WILL
BRING COOL AND UNSETTLED CONDITIONS THROUGH THE EXTENDED. THE FIRST
SYSTEM WILL BRING SHOWERS TO THE AREA ON MONDAY WITH A GREATER THAN
70% CHANCE OF PRECIPITATION IN ALL AREAS. A LOW (LESS THAN 15%)
CHANCE OF THUNDERSTORMS WILL DEVELOP AHEAD OF THE TROUGH AXIS AND
COLD FRONT ON MONDAY. SNOW LEVELS WILL GENERALLY BE 4000-5500 FT
MSL. WINDS WILL BE GUSTY ON MONDAY, ESPECIALLY ACROSS PORTIONS OF
SOUTHEAST OREGON AND FAR SOUTHWEST IDAHO NEAR THE NEVADA BORDER
WHERE GUSTS TO AROUND 50 MPH ARE POSSIBLE. THE COLD FRONT WILL PUSH
THROUGH MONDAY NIGHT WITH PRECIPITATION DECREASING BY TUESDAY
MORNING AS THE SYSTEM EXITS TO OUR EAST. OVERALL, LIGHT TO MODERATE
PRECIPITATION AMOUNTS CAN EXPECTED WITH THIS SYSTEM. SNOW LEVELS
WILL FALL TO NEAR VALLEY FLOORS TUESDAY MORNING BEHIND THE FRONT,
BUT LITTLE PRECIPITATION IS EXPECTED BY THAT POINT. WINDS WILL
REMAIN GUSTY ON TUESDAY, STRONGEST IN THE MAGIC VALLEY.
ADDITIONAL WEAK SYSTEMS ARE EXPECTED TO MOVE ACROSS OUR AREA
WEDNESDAY THROUGH FRIDAY AS A LONGWAVE TROUGH SETS UP OVER THE
WESTERN U.S. THIS PATTERN WILL PROVIDE A 20-50% CHANCE OF SHOWERS ON
WEDNESDAY AND FRIDAY WITH A 40-70% CHANCE ON THURSDAY AS A DEEPER
SYSTEM MOVES THROUGH. SNOW LEVELS ARE GENERALLY EXPECTED TO
FLUCTUATE AROUND 3000-4500 FEET WITH LIGHT SNOW ACCUMULATIONS IN THE
MOUNTAINS. TEMPERATURES ARE EXPECTED TO AVERAGE AROUND 5-10 DEGREES
BELOW NORMAL, THEN WARM SLIGHTLY TO CLOSER TO NORMAL BY FRIDAY.
BREEZY WINDS CAN ALSO BE EXPECTED WITH EACH PASSING SYSTEM.
AVIATION
MAINLY VFR. NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS
THROUGH EARLY THIS EVENING, WITH SCATTERED SHOWERS CONTINUING
OVERNIGHT. SMALL HAIL, GRAUPEL, AND ERRATIC GUSTS TO 35 KT POSSIBLE
NEAR THUNDERSTORMS, WITH BRIEF MVFR/IFR CONDITIONS ALSO POSSIBLE.
SNOW LEVELS 5-6KFT MSL. MOUNTAINS OBSCURED. SURFACE WINDS: SW-NW 5-
15 KT. WINDS ALOFT AT 10KFT: SW-W 10-20 KT.
KBOI...MAINLY VFR. RAIN SHOWERS CONTINUING THROUGH SATURDAY MORNING.
ISOLATED THUNDERSTORMS WITH GRAUPEL AND GUSTS UP TO 30 KT POSSIBLE
(20% CHANCE) THROUGH EARLY THIS EVENING. SURFACE WINDS: VARIABLE
LESS THAN 10 KT, BECOMING NW 5-10 KT LATE TONIGHT.
WEEKEND OUTLOOK...RAIN AND SNOW SHOWERS ON SATURDAY, MAINLY IN THE
MOUNTAINS. A BREAK IN PRECIPITATION SATURDAY NIGHT AND MOST OF
SUNDAY, WITH PRECIP CHANCES INCREASING SUNDAY NIGHT. GENERALLY VFR-
MVFR IN RAIN, WITH REDUCTIONS TO IFR IN MOUNTAIN SNOW. SNOW LEVELS
3500-4500FT MSL. MOUNTAINS OBSCURED ON SATURDAY, IMPROVING ON
SUNDAY. SURFACE WINDS: W-NW 10-20 KT ON SATURDAY WITH GUSTS TO 35 KT
IN THE MAGIC VALLEY, BECOMING S-SE 10-20 KT ON SUNDAY.
HYDROLOGY
SNOWMELT AND PERIODS OF PRECIPITATION WILL CAUSE
RISING WATER LEVELS IN RIVERS, CREEKS, AND STREAMS ACROSS
SOUTHEAST OREGON AND SOUTHWEST IDAHO INTO THE WEEKEND AND EARLY
NEXT WEEK. A FLOOD WARNING REMAINS IN EFFECT FOR THE SILVIES
RIVER NEAR BURNS, OREGON AND THE MALHEUR RIVER NEAR VALE,
OREGON. THOSE WITH INTERESTS NEAR WATERWAYS SHOULD REMAIN ALERT
TO CHANGING CONDITIONS.
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...KA
LONG TERM....ST
AVIATION.....ST
HYDROLOGY...ST
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