368
FXUS65 KBOI 220825
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
ISSUED BY NATIONAL WEATHER SERVICE POCATELLO ID
225 AM MDT TUE APR 22 2025
SHORT TERM...TODAY THROUGH THURSDAY NIGHT
ZONAL FLOW ALOFT
WILL BRING MOSTLY CLEAR SKIES TODAY. FLOW WILL SHIFT TO SW WED
THROUGH THU AS A DEEP UPPER TROUGH FORMS OFF THE COAST. THERE'S
VERY LITTLE CHANCE OF PRECIPITATION THROUGH THU MORNING, BUT BY
THU AFTERNOON, A CHANCE OF SHOWERS DEVELOPS OVER THE EASTERN
FRINGE OF THE AREA (GENERALLY FROM VALLEY COUNTY SOUTH THROUGH
THE BOISE MOUNTAINS/CAMAS PRAIRIE AND INTO TWIN FALLS COUNTY AND
SOUTHEAST OWYHEE COUNTY). THIS CHANCE OF PRECIPITATION DECREASES
RAPIDLY THURSDAY NIGHT. WINDS SHOULD BE LIGHT THROUGH THE SHORT
TERM, WITH TEMPERATURES NEAR NORMAL TODAY, WARMING TO 5 TO 10
DEGREES ABOVE NORMAL THURSDAY.
LONG TERM...FRIDAY THROUGH TUESDAY
ACTIVE PATTERN FRIDAY
THROUGH TUESDAY. PRECIPITATION CHANCES BEGIN TO INCREASE
THROUGHOUT THE DAY FRIDAY AS AN UPPER LEVEL TROUGH PROGRESSES
EAST INTO THE CONUS BEFORE CLOSING OFF JUST TO THE SOUTH OF OUR
AREA. THERE IS A CONSISTENT SIGNAL OF INSTABILITY BUILDING IN
FRIDAY AFTERNOON/EVENING AS THE UPPER TROUGH MOVES OVERHEAD,
ALLOWING FOR A SLIGHT CHANCE (10-20%) OF THUNDERSTORMS OVER
HIGHER TERRAIN; THIS INCLUDES EASTERN OREGON, SOUTHWEST ID
HIGHLANDS, AND OVER THE WEST-CENTRAL MOUNTAINS. PRECIPITATION
CHANCES REMAIN ELEVATED THROUGH SUNDAY AS THE UPPER CLOSED LOW
SITS OVERHEAD. THERE CONTINUES TO BE A SIGNAL FOR THUNDERSTORMS
TO BE PLAUSIBLE BOTH SATURDAY AND SUNDAY AFTERNOONS.
PRECIPITATION CHANCES BEGIN TO DECREASE FROM THE WEST TO EAST
THROUGH MONDAY. DRYING OUT AREA-WIDE BY TUESDAY AS THE TROUGH
EXITS OUR AREA ENTIRELY. TEMPERATURES REMAIN SEASONABLE FRIDAY
THROUGH TUESDAY. SNOW LEVELS INITIALLY 6-8 KFT FRIDAY, DROPPING
TO 4.5-5.5 KFT SUNDAY BEFORE RISING BACK TO 6-7 KFT BY TUESDAY.
AVIATION
VFR. SURFACE WINDS: VARIABLE UNDER 10 KT BECOMING
N-NE 5-15 THIS AFTERNOON. VARIABLE UNDER 10KT TUESDAY NIGHT.
WINDS ALOFT AT 10KFT: W-SW 10-20 KT.
KBOI...VFR. VARIABLE UNDER 10 KT THIS MORNING, BECOMING NW 5-10.
BACK TO VARIABLE UNDER 10 KT TUESDAY NIGHT.
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...SP
LONG TERM....NF
AVIATION.....NF
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