594
FXUS65 KBOI 120916
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
316 AM MDT FRI JUN 12 2026
KEY MESSAGES
- CLEAR, WARMER, AND DRIER CONDITIONS PERSIST THROUGH SUNDAY.
- BREEZY AFTERNOON WINDS FROM MOUNTAIN HOME THROUGH WESTERN
MAGIC VALLEY TODAY.
- SIGNIFICANT WARMING BEGINS MONDAY WITH TEMPERATURES PEAKING
ON TUESDAY, FOLLOWED BY A SLIGHT COOLING TREND BY MID-WEEK AS
THE RIDGE FLATTENS.
SHORT TERM /THROUGH SUNDAY NIGHT/
A ROBUST PACIFIC HIGH PRESSURE RIDGE ALOFT WILL CONTINUE TO
BUILD EASTWARD INTO THE PACIFIC NORTHWEST TODAY, REPLACING THE
COOL TROUGH. THIS SETUP WILL ENSURE ENTIRELY CLEAR SKIES AND DRY
CONDITIONS ACROSS OUR COUNTY WARNING AREA. A WEAK SHORTWAVE
PASSAGE TO THE NORTHEAST WILL TIGHTEN THE PRESSURE GRADIENT THIS
AFTERNOON BRINGING BREEZY WESTERLY WINDS TO THE SNAKE RIVER
PLAIN FROM MOUNTAIN HOME THROUGH THE WESTERN MAGIC VALLEY.
AFTERNOON MAXIMUM TEMPERATURES TODAY WILL CLIMB A FEW DEGREES
HIGHER THAN THURSDAY, REACHING RIGHT AROUND NORMAL SEASONAL
BENCHMARKS FOR MID-JUNE. THE RIDGE AXIS REMAINS TO THE WEST OF
THE FORECAST AREA THROUGH THE WEEKEND. STABLE AND WARM
CONDITIONS WILL HOLD LEVEL THROUGH SUNDAY. LIGHT DIURNAL WINDS
CAN BE EXPECTED, MAINLY STICKING TO TYPICAL DRAINAGE PATHS IN
THE MOUNTAIN VALLEYS AND GENTLE WESTERN BREEZES ALONG THE SNAKE
RIVER PLAIN. OVERNIGHT LOWS WILL REMAIN COMFORTABLE, DROPPING
INTO THE UPPER 40S TO MID 50S IN LOWER VALLEY LOCATIONS AND THE
30S ACROSS MOUNTAIN BASINS.
LONG TERM /MONDAY THROUGH FRIDAY/
ENSEMBLE GUIDANCE IS IN EXCELLENT AGREEMENT REGARDING A BRIEF
SYNOPTIC SHIFT SCHEDULED FOR EARLY NEXT WEEK. THE UPPER-LEVEL
RIDGE IS FORECAST TO AMPLIFY SUBSTANTIALLY AS IT CENTERS OVER
THE GREAT BASIN AND PACIFIC NORTHWEST MONDAY AND TUESDAY. DAILY
HIGH TEMPERATURES WILL TREND UPWARD BY SEVERAL DEGREES EACH
AFTERNOON WITH VALLEY HIGHS REACHING THE MID 90S BY TUESDAY
AFTERNOON. THE HIGH PRESSURE RIDGE BEGINS TO FLATTEN OUT
SLIGHTLY BY WEDNESDAY AS A WEAK SHORTWAVE SKIMS OUR NORTHERN
PERIPHERY. THIS WILL LOWER TEMPERATURES TO ABOUT 5 DEGREES ABOVE
NORMAL AND COULD INTRODUCE A SLIGHT INCREASE IN BREEZY
AFTERNOON WINDS, BUT CONDITIONS WILL STAY THOROUGHLY DRY WITH NO
PRECIPITATION EXPECTED THROUGH THE ENTIRE LONG TERM PERIOD.
AVIATION /06Z FRIDAY THROUGH SATURDAY/
ISSUED 1118 PM MDT THU JUN 11 2026
VFR AND MOSTLY CLEAR. SURFACE WINDS: VARIABLE UP TO 10 KT THROUGH
FRIDAY MORNING, THEN NW 10-20 KT WITH GUSTS TO 20-35 KT BY FRIDAY
MID-AFTERNOON THROUGH NIGHT. WINDS ALOFT AT 10KFT MSL: WEST TO
NORTHWEST 10-20 KT.
KBOI...VFR AND CLEAR. SURFACE WINDS: VARIABLE OR SE 3-6 KT
OVERNIGHT. RETURNING NW AROUND FRI/16Z, INCREASING TO 8-15 KT WITH
GUSTS TO 20-25 KT IN THE AFTERNOON.
WEEKEND OUTLOOK...VFR AND MOSTLY CLEAR, EXCEPT A FEW AFTERNOON
MOUNTAIN CUMULUS. SURFACE WINDS: NW-NE 10-20 KT WITH PM GUSTS TO 20-
30 KT SATURDAY, THEN W-NW 5-15 KT WITH PM GUSTS AROUND 20 KT
SUNDAY.
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...JDS
LONG TERM....JDS
AVIATION.....JDS
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