547
FXUS65 KBOI 221550
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
950 AM MDT WED OCT 22 2025
DISCUSSION
HIGH PRESSURE WILL REMAIN OVERHEAD TODAY WITH A
LOW TO OUR SOUTH AND TROUGH TO OUR NORTH. THESE FEATURES WILL
DRIVE LOCALLY BREEZY SOUTHEAST WINDS TODAY, WITH GUSTS 10-25
MPH THOUGH THE SNAKE BASIN INTO BAKER COUNTY. HIGH TEMPERATURES
WILL BE SLIGHTLY ABOVE NORMAL UNDER THE RIDGE, WITH HIGH CLOUDS
INCREASING ESPECIALLY ACROSS THE SOUTH. FORECAST REMAINS ON
TRACK AND NO UPDATES THIS MORNING.
AVIATION
VFR. PATCHY FOG OVERNIGHT. SURFACE WINDS: VARIABLE
LESS THAN 10 KT. WINDS ALOFT AT 10KFT MSL: W-SW 5-15 KT.
KBOI...VFR. SURFACE WINDS: SE 5-10KT BECOMING VARIABLE 5KT WED
AFTERNOON.
PREV DISCUSSION
SHORT TERM...TODAY THROUGH FRIDAY NIGHT...A RIDGE OF HIGH
PRESSURE WILL CONTINUE TO BUILD OVER THE REGION THROUGH
THURSDAY, AS A LOW PRESSURE SYSTEM MOVES SOUTH OF THE AREA
WEDNESDAY. THIS LOW WILL BRING CLOUDS OVER AREAS NEAR THE NEVADA
BORDER, BUT PRECIPITATION WILL STAY WELL TO OUR SOUTH.
OTHERWISE, SKIES WILL BE MOSTLY CLEAR ACROSS THE REGION THROUGH
FRIDAY. TEMPERATURES WILL STEADILY CLIMB THROUGHOUT THE WEEK,
WITH FRIDAY'S HIGHS PEAKING AT ABOUT 5-10 DEGREES ABOVE NORMAL.
WINDS WILL REMAIN LIGHT AND PRIMARILY TERRAIN DRIVEN, WITH
SOUTHEAST WINDS IN THE VALLEYS KEEPING OVERNIGHT LOWS ELEVATED
IN THE UPPER TREASURE VALLEY AND MAGIC VALLEY. SHELTERED
MOUNTAIN VALLEYS COULD SEE SOME OVERNIGHT FOG AND LOW CLOUDS
TOMORROW NIGHT, BUT CONFIDENCE IS LOW.
LONG TERM...SATURDAY THROUGH WEDNESDAY...WARM
SOUTHWEST FLOW AHEAD OF THE ATMOSPHERIC RIVER EVENT THIS
WEEKEND WILL KEEP TEMPERATURES ELEVATED ON SATURDAY, BUT
SLIGHTLY COOLER THAN FRIDAY. GUSTY WINDS WILL PRECEDE THE
PRECIPITATION ON SATURDAY, WITH SOUTHWEST WINDS PEAKING AT 20-30
MPH WITH GUSTS TO 40 MPH ACROSS HIGH TERRAIN IN SOUTHEAST
OREGON. WIDESPREAD PRECIPITATION IS ANTICIPATED BEGINNING ON
SATURDAY MORNING IN SOUTHEAST OREGON THEN MOVING INTO SOUTHWEST
IDAHO BY SATURDAY EVENING. SNOW LEVELS WILL INITIALLY STAY
AROUND 7000-8000 FEET FOR THE HEAVIEST PRECIPITATION, LOWERING
TO 4000-5000 FEET BY MONDAY WITH ANOTHER ROUND OF PRECIPITATION
EXPECTED.
A RIDGE OF HIGH PRESSURE WILL SLOWLY BUILD IN BY TUESDAY
MORNING, BRINGING A RETURN TO WARM CONDITIONS TOWARDS THE
MIDDLE OF THE WEEK. A TROUGH OVER THE PACIFIC NORTHWEST COAST
WILL BRING SOME LIGHT SHOWERS OVER HIGH TERRAIN IN THE WEST
CENTRAL MOUNTAINS BY WEDNESDAY, OTHERWISE CONDITIONS WILL STAY
DRY.
PRELIMINARY POINT TEMPS/POPS
BAKER CITY 28 63 31 63 / 0 0 0 0
BOISE 40 64 42 69 / 0 0 0 0
BURNS 25 65 27 67 / 0 0 0 0
CALDWELL 36 66 38 69 / 0 0 0 0
FAIRFIELD 28 62 27 61 / 0 0 0 0
IDAHO CITY 30 65 30 67 / 0 0 0 0
JEROME 39 60 37 63 / 0 0 0 0
MCCALL 30 58 31 58 / 0 0 0 0
MOUNTAIN HOME 36 66 37 69 / 0 0 0 0
ONTARIO 34 66 35 66 / 0 0 0 0
ROME 32 67 33 71 / 0 0 0 0
TWIN FALLS 38 60 37 65 / 0 0 0 0
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
DISCUSSION...ST
AVIATION.....CH
SHORT TERM...SA
LONG TERM....SA
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