387
FXUS65 KBOI 140115
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
715 PM MDT WED MAY 13 2026
UPDATE
UPDATED AVIATION DISCUSSION.
KEY MESSAGES
- A COLD FRONT TODAY WILL BRING VERY GUSTY WINDS, BLOWING DUST,
AND THUNDERSTORMS THROUGH THIS EVENING.
- JUST ABOVE NORMAL TEMPS THROUGH FRIDAY BEFORE ANOTHER
COOLDOWN THIS WEEKEND, CONDITIONS STAY DRY AND BREEZY.
- ANOTHER ROUND OF PRECIPITATION THIS WEEKEND WITH LOWER SNOW
LEVELS WILL BRING SNOW TO HIGHER ELEVATIONS.
SHORT TERM /THROUGH FRIDAY NIGHT/
ISSUED 227 PM MDT WED MAY 13 2026
THE ONGOING COLD FRONTAL PASSAGE HAS BROUGHT VERY GUSTY WINDS TO
THE FORECAST AREA TODAY. WIND GUSTS 40-60 MPH IN OPEN AREAS, AND
20-30 MPH IN SHELTERED VALLEYS ARE WIDESPREAD, THUS A WIND
ADVISORY HAS BEEN ISSUED TO HIGHLIGHT THE AREAS WITH THE
STRONGEST WINDS. THE WIND HAS ALSO KICKED UP DUST FROM DRY
LAKEBEDS, PLAYAS, AND DRY AGRICULTURAL AREAS. VISIBILITY HAS
BEEN REDUCED AS LOW AS 1 MILE NEAR THE DUST SOURCES, WHILE MOST
OF THE AREA SEES A GENERAL HAZINESS. AS THE FRONT MOVES
EASTWARD, A FEW MORE HOURS OF STORMS ARE POSSIBLE IN THE MAGIC
VALLEY BEFORE PRECIPITATION MOVES OUT OF THE AREA. GUSTS UP TO
60 MPH AND LIGHTNING ARE POSSIBLE IN STORMS. HOWEVER, THE DRY
ATMOSPHERE WILL LIMIT PRECIPITATION RATES. THE WEATHER WILL
TAPER OFF TONIGHT, WITH THE WIND ADVISORY SET TO EXPIRE ON THE
IDAHO SIDE AROUND MIDNIGHT.
THURSDAY AND FRIDAY CONDITIONS REMAIN DRY AND BREEZY AND TIGHT
ZONAL FLOW SETS IN ALOFT. BEHIND THE COLD FRONT, TEMPS DROP TO
JUST ABOVE NORMAL FOR THIS TIME OF YEAR. AFTERNOON MINIMUM
RELATIVE HUMIDITIES STAY VERY LOW, AND THE DRYNESS INCREASES THE
DIURNAL TEMPERATURE SPREAD TO BRING MORNING LOWS DOWN TO 5
DEGREES BELOW NORMAL.
LONG TERM /SATURDAY THROUGH WEDNESDAY/
ISSUED 227 PM MDT WED MAY 13 2026
A LARGE TROUGH WILL MOVE ON SHORE AND ACROSS THE PACIFIC NORTHWEST
AND NORTHERN ROCKIES THIS WEEKEND. THIS WILL BRING A SIGNIFICANT
COOLING TREND THAT WILL DROP DAYTIME TEMPERATURES TO 10-15 DEGREES
BELOW NORMAL BY SUNDAY ALONG WITH BREEZY TO WINDY CONDITIONS IN
NORTHWEST FLOW. NOT MUCH PRECIPITATION IS EXPECTED FROM THIS SYSTEM.
SATURDAY NIGHT AND SUNDAY PROBABILITY OF PRECIPITATION IS AROUND A
30-50 PERCENT OVER THE NORTHERNMOST MOUNTAIN AREAS OF OUR FORECAST
AREA, INCLUDING MCCALL, AND ABOUT 20-30 PERCENT FOR HIGH TERRAIN
ACROSS THE SOUTH. SNOW LEVELS WILL LOWER TO ABOUT 4000-5000 FEET.
FROM MONDAY THROUGH WEDNESDAY OF NEXT WEEK, OUR AREA WILL MOSTLY
STAY UNDER A DRY WEST-NORTHWEST FLOW WITH TEMPERATURES TRENDING UP
TO NEAR SEASONAL NORMALS.
AVIATION /00Z THURSDAY THROUGH FRIDAY/
ISSUED 713 PM MDT WED MAY 13 2026
WEST WINDS 25-35KT GUSTS TO 50 KT, IN SOUTHERN ID UNTIL 14/02Z.
AREAS OF MVFR IN BLOWING DUST EAST OF KBOI UNTIL 03Z. AS OF
13/23Z THUNDERSTORMS HAVE SHIFTED EAST OF KJER AND KTWF AND WILL
CONTINUE TO SHIFT AWAY FROM THOSE SITES. VFR IN EASTERN OR WITH
WEST WINDS 15-30 KT UNTIL 14/02Z, THEN DECREASING TO 8 TO 15
KT. BECOMING VFR IN ALL AREAS BY 14/06Z WITH WEST/NORTHWEST WIND
DECREASING TO 10-20 KT.
KBOI...VFR. SURFACE WINDS NW 20-25 KT WITH GUSTS TO 30 KT UNTIL
SUNSET THEN DECREASING TO 10KT.
BOI WATCHES/WARNINGS/ADVISORIES
ID...WIND ADVISORY UNTIL MIDNIGHT MDT TONIGHT FOR IDZ012-014>016-
028>030.
OR...WIND ADVISORY UNTIL MIDNIGHT MDT /11 PM PDT/ TONIGHT FOR
ORZ064.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
AVIATION.....LC
SHORT TERM...JM
LONG TERM....TL
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