416
FXUS65 KBOI 181602
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
1002 AM MDT FRI JUL 18 2025
DISCUSSION
VISIBLE SATELLITE THIS MORNING SHOWS SMOKE ALOFT
OVER OVER MUCH OF THE CWA. THIS IS EXPECTED TO CONTINUE TODAY,
WITH SOME AMOUNT OF SMOKE POSSIBLE NEAR-SURFACE. TEMPERATURES
WILL NEAR 100 DEGREES TODAY THROUGH THE SNAKE RIVER PLAIN.
ISOLATED TO SCATTERED AFTERNOON THUNDERSTORMS ARE EXPECTED
ALONG THE ID/NV BORDER AGAIN TODAY, WITH THUNDERSTORM OUTFLOW
GUSTS OF 40+ MPH POSSIBLE. SLIGHT HINTS OF CONVECTION POSSIBLE
IN CENTRAL/SOUTHERN HARNEY, MALHEUR, AND OWYHEE COUNTIES,
HOWEVER LARGEST CHANCES REMAIN SOUTH OF TWIN FALLS THIS
AFTERNOON.
AVIATION
VFR. SMOKE ALOFT WILL CONTINUE THROUGH
EVENING/OVERNIGHT, MOSTLY NEAR KBNO AND KBKE. ISOLATED/SCATTERED
THUNDERSTORMS CONTINUING TO DEVELOP ALONG THE ID/OR/NV BORDER AND
MOVING E/NE THROUGH THE EVENING. THUNDERSTORM OUTFLOW GUSTS UP TO 40
KTS EXPECTED TO CONTINUE OVER THE OWYHEE MOUNTAINS AND LOWER MAGIC
VALLEY. SURFACE WINDS: W/NW 5-15 KT, WITH GUSTS NEAR 20 KTS MAINLY
OVER SE OR THIS EVENING. WINDS ALOFT AT 10KT MSL: W 10-20 KT.
KBOI...VFR. SURFACE WINDS: NW 5-10 KT BECOMING VARIABLE UNDER 7 KT
TONIGHT.
WEEKEND OUTLOOK...ISOLATED THUNDERSTORMS ALONG ID/NV BORDER FRIDAY
AFTERNOON. OTHERWISE, MOSTLY CLEAR EXCEPT FOR OCCASIONAL SMOKE ALOFT
FROM E-CENTRAL OR AND W-CENTRAL ID MOUNTAINS. SURFACE WINDS: W-NW 5-
15 KT, WITH AFTERNOON GUSTS 15-25 KT.
PREV DISCUSSION
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.
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...CH
AVIATION.....LC
SHORT TERM...BW
LONG TERM....BW
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