381
FXUS65 KBOI 180948 CCA
AFDBOI
AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE BOISE ID
348 AM MDT FRI JUL 18 2025
SHORT TERM...TODAY THROUGH SUNDAY NIGHT
A WEST-SOUTHWEST
FLOW ALOFT WILL MAINTAIN THE MOSTLY DRY CONDITIONS TODAY,
EXCEPT THERE IS SOME MOISTURE AVAILABLE FOR CONVECTION SOUTH OF
TWIN FALLS WHERE THERE IS A 15-30 PERCENT CHANCE OF SHOWERS AND
THUNDERSTORMS THIS AFTERNOON. THERE IS A THREAT OF GUSTY
OUTFLOW WINDS TO 50 MPH WITH THE STORMS, WITH A SLIGHT CHANCE OF
THOSE OUTFLOW WINDS REACHING TWIN FALLS LATER THIS AFTERNOON.
THE MOISTURE AND SUBSEQUENT CONVECTION ARE EXPECTED TO MOVE EAST
OF THE AREA THIS EVENING. DRY CONDITIONS PREVAIL ACROSS SE
OREGON AND SW IDAHO THIS WEEKEND AS AN UPPER TROUGH DEVELOPS TO
OUR NORTH. THE TROUGH WILL BRING A SLIGHT COOLING TREND THROUGH
THE WEEKEND, ALONG WITH GUSTY WINDS IN THE AFTERNOON. THE WESTERLY
FLOW WILL CONTINUE TO BRING SMOKE LAYERS INTO THE REGION FROM
WILDFIRES (MAINLY IN OREGON) THROUGH THE WEEKEND.
LONG TERM...MONDAY THROUGH FRIDAY
AN UPPER TROUGH TO OUR
NORTH MOVES SOUTHWARD OUT OF WESTERN CANADA EARLY NEXT WEEK,
REACHING THE PACIFIC NORTHWEST BY MONDAY. THIS WILL LEAD TO
CHANCE (LESS THAN 30 PERCENT) OF SHOWERS AND AFTERNOON
THUNDERSTORMS MONDAY AND TUESDAY IN THE NORTH, ALONG WITH BREEZY
CONDITIONS - ESPECIALLY IN SOUTHERN AREAS ON MONDAY. MODELS ARE
IN GOOD AGREEMENT WITH THIS SYSTEM AND EVENTUAL EXIT TO THE
EAST ON WEDNESDAY, BRINGING A RETURN TO DRY CONDITIONS FOR THE
REMAINDER OF THE WEEK. TEMPERATURES AROUND 5 DEGREES BELOW
NORMAL EARLY IN THE PERIOD RISE TO NEAR NORMAL BY MIDWEEK.
AVIATION
VFR. ISOLATED THUNDERSTORMS WITH GUSTY OUTFLOW WINDS
TO 40 KT SOUTH OF KTWF AFTER FRI/18Z. HIGH DENSITY AFTERNOON
DUE TO HOT AFTERNOON TEMPERATURES. AREAS OF SMOKE, MAINLY ALOFT.
SURFACE WINDS: VARIABLE LESS THAN 10 KT BECOMING W-NW 5-15 KT
AFTER FRI/18Z. WINDS ALOFT AT 10KT MSL: W 10-20 KT.
KBOI...VFR. SURFACE WINDS: VARIABLE LESS THAN 6 KT BECOMING NW
8-12 KT WITH GUSTS TO 20 KT AFTER FRI/17Z.
WEEKEND OUTLOOK...VFR. AREAS OF SMOKE, MAINLY ALOFT. SURFACE
WINDS: W-NW 5-15 KT, WITH AFTERNOON GUSTS 15-25 KT.
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...BW
LONG TERM....BW
AVIATION.....BW
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