935
FXUS65 KBOI 200922
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
222 AM MST THU FEB 20 2025
SHORT TERM...TODAY THROUGH SATURDAY NIGHT
AN AREA OF LIGHT SNOW CONTINUES TO GRADUALLY SHIFT EASTWARD,
REMAINING FOCUSED OVER THE WESTERN MAGIC VALLEY AND BOISE
MOUNTAINS. AREAS OF FOG ARE ONCE AGAIN DEVELOPING ACROSS THE
SNAKE PLAIN WITHIN THE REMNANT LOW-LEVEL MOISTURE STILL IN
PLACE. PRECIPITATION CHANCES WILL BE NEAR ZERO BY MID-DAY TODAY
AMIDST DIMINISHING CLOUD COVER, AS TEMPORARY RIDGING BUILDS OVER
THE REGION. TEMPERATURES HOLD STEADY TODAY BEFORE A SLIGHT
WARMING TREND FRIDAY AND SATURDAY. A MORE ACTIVE REGIME AMIDST
AN INFLUX OF PACIFIC MOISTURE RETURNS SATURDAY MORNING INTO NEXT
WEEK, BRINGING RAIN AND SNOW (ABOVE ABOUT 4000 FEET) TO MAINLY
EAST-CENTRAL OREGON AND WEST-CENTRAL IDAHO DURING THE DAY SATURDAY.
THERE IS MORE UNCERTAINTY ABOUT THE OCCURRENCE OF PRECIPITATION
FARTHER SOUTH INTO SOUTHWEST IDAHO AND SOUTHEAST OREGON. MORE
WIDESPREAD RAIN AND SNOW CHANCES DEVELOP LATE SATURDAY ACROSS
THE ENTIRE AREA AMIDST RAPIDLY RISING SNOW LEVELS.
LONG TERM...SUNDAY THROUGH THURSDAY
MODEL GUIDANCE REMAINS CONSISTENT IN SHOWING A PACIFIC FRONTAL
SYSTEM MOVING INTO THE AREA AND BRINGING WIDESPREAD PRECIPITATION
THROUGH LATE NIGHT SATURDAY AND THROUGHOUT SUNDAY. RAIN WILL BE
EXPECTED ACROSS THE LOWER VALLEYS. SNOW LEVELS INITIALLY WILL BE
BETWEEN 4000-5000 FT AND RISE TO 6000-7000 FT BY SUNDAY AFTERNOON
INTO EARLY NEXT WEEK. THIS WILL FAVOR RAIN IN SOME MOUNTAIN AREAS
THAT RECEIVED SIGNIFICANT SNOWFALL RECENTLY, WHICH WILL INCREASE THE
POTENTIAL FOR SOME RISES IN AREA RIVERS EARLY NEXT WEEK. DAYTIME
TEMPERATURES ARE EXPECTED TO BE WARMER IN THE LOW TO MID 50S FROM
MONDAY TO MID-WEEK, WITH NIGHTTIME TEMPERATURES EXPECTED TO REMAIN
IN THE HIGH 30S TO LOW 40S. BRIEF HIGH PRESSURE WILL BUILD IN
THROUGH TUESDAY, BEFORE ANOTHER TROUGH MOVES IN ACROSS THE PACIFIC
NW WITH ANOTHER ROUND OF PRECIPITATION EXPECTED. UPPER RIDGING WILL
BUILD IN THE MIDDLE OF THE WEEK WITH DRIER CONDITIONS RETURNING.
AVIATION
WIDESPREAD MVFR AND LOCAL IFR CONDITIONS IN FOG,
WITH SNOW CONFINED TO KTWF/KJER. MOUNTAINS OBSCURED.
PRECIPITATION DIMINISHING LATER THIS MORNING. SURFACE WINDS:
W-NW 5-15 KT. GUSTS TO 25 KT AT KTWF/KJER. WINDS ALOFT AT 10KFT
MSL: NW 20-35 KT.
KBOI...MVFR TO IFR IN FOG AND LOW CEILINGS. VISIBILITIES MAY
OCCASIONALLY DROP BELOW 1 SM THIS MORNING. IMPROVING CONDITIONS
AFTER THU/12Z WITH VFR THE REMAINDER OF THE PERIOD. SURFACE
WINDS: W-NW 6-12 KT, BECOMING VARIABLE AFTER FRI/02Z.
WEEKEND OUTLOOK...
PRECIPITATION RETURNS SATURDAY AND SUNDAY, WITH HIGH SNOW LEVELS
FAVORING RAIN AT ALL TERMINALS, EXCEPT FOR PERIODS OF A RAIN/SNOW
MIX AT KMYL ON SATURDAY. LOW CEILINGS POSSIBLE IN
PRECIPITATION, ESPECIALLY LATE SATURDAY AND SUNDAY MORNING.
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...JR
LONG TERM....JY/JR
AVIATION.....JR
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