605
FXUS65 KBOI 052022
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
222 PM MDT MON OCT 5 2026
KEY MESSAGES
- CONTINUED VERY WARM AND DRY THROUGH FRIDAY.
- ISOLATED THUNDERSTORMS LATE TODAY AND THIS EVENING ALONG THE
ID/NV BORDER.
- MUCH COOLER, WITH SHOWERS POSSIBLE, SATURDAY THROUGH MONDAY.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
HIGH PRESSURE ALOFT WILL CONTINUE VERY WARM AND MOSTLY DRY
WEATHER THROUGH THE PERIOD. A WEAK UPPER LOW PASSING EASTWARD
ACROSS NV WILL DEVELOP ISOLATED THUNDERSTORMS LATE TODAY AND
THIS EVENING ALONG THE ID/NV BORDER. GUSTY OUTFLOW WINDS TO 40
MPH ARE POSSIBLE FROM THESE STORMS. LIGHT TERRAIN-DRIVEN WINDS
ELSEWHERE. HIGH TEMPS WILL CONTINUE NEAR RECORD HIGH LEVELS WITH
LITTLE DAY-TO-DAY CHANGE. NIGHTS WILL CONTINUE COOL RESULTING
IN LARGE DIURNAL RANGES.
LONG TERM /THURSDAY THROUGH MONDAY/
UPPER-LEVEL RIDGING, WARM TEMPERATURES, CLEAR SKIES, AND CALM WINDS
WILL CONTINUE THURSDAY AND FRIDAY. TEMPERATURES 10 TO 20 DEGREES
ABOVE NORMAL WILL BE SEEN ACROSS THE AREA ON THESE DAYS. A DRASTIC
PATTERN CHANGE IS FORECAST OVER THE WEEKEND, WITH AN UPPER-LEVEL
TROUGH MOVING THROUGH THE PACIFIC NORTHWEST. WINDS WILL START TO
PICK UP ON FRIDAY ACROSS THE HIGHER TERRAIN, WITH GUSTS 20 TO 30
MPH. THE TROUGH WILL PUSH A COLD FRONT THROUGH THE AREA ON SATURDAY,
BRINGING COOLER TEMPERATURES AND BREEZY CONDITIONS INTO THE LOWER
VALLEYS AS WELL. HIGHS ARE FORECAST TO COOL BY 10 TO 15 DEGREES FROM
FRIDAY, BUT ENSEMBLE VARIABILITY IN THE TIMING OF THE FRONT REDUCES
CONFIDENCE IN THE TEMPERATURE FORECAST FOR SATURDAY. THE TROUGH IS
FAVORED TO DEEPEN OVER THE PACIFIC NORTHWEST AND IS BECOMING
INCREASINGLY LIKELY TO MOVE OVERHEAD AS A CLOSED LOW INTO EARLY NEXT
WEEK. THIS WILL CONTINUE THE COOLING TREND ON SUNDAY AND MONDAY. A
CHANCE OF PRECIPITATION WILL DEVELOP ESPECIALLY EAST OF THE LOW WITH
A 20-40% CHANCE OF RAIN AND HIGH MOUNTAIN SNOW ACROSS CENTRAL/SOUTH
CENTRAL IDAHO, AND A 10-20% CHANCE FURTHER WEST. WINDS WILL REMAIN
BREEZY UNDER THIS PATTERN.
AVIATION /18Z MONDAY THROUGH TUESDAY/
ISSUED 1201 PM MDT MON OCT 5 2026
VFR. HIGH CLOUDS MOVING OVERHEAD TODAY, DECREASING TONIGHT.
AREAS OF SMOKE AND HAZE MAY REDUCE VISIBILITY NEAR PRESCRIBED
BURNS. ISOLATED SHOWERS AND THUNDERSTORMS LATE THIS AFTERNOON
AND EVENING SOUTH OF KTWF. SURFACE WINDS: VARIABLE LESS THAN 12
KT. WINDS ALOFT AT 10KFT MSL: SW-W 5-15 KT.
KBOI...VFR WITH PERIODS OF HIGH CLOUDS. SURFACE WINDS: SE AROUND
5 KT, BECOMING NW BY MID-AFTERNOON.
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...LC
LONG TERM....CH
AVIATION.....CH
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page