376
FXUS65 KBOI 132027
AFDBOI
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
227 PM MDT WED MAY 13 2026
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/
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/
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 /18Z WEDNESDAY THROUGH THURSDAY/
ISSUED 1152 AM MDT WED MAY 13 2026
VFR EXCEPT AREAS OF MVFR IN BLOWING DUST. ISOLATED TO SCATTERED
SHOWERS AND THUNDERSTORMS THIS AFTERNOON FROM KBKE TO KMYL AREA
AND WESTERN MAGIC VALLEY. A STRONG COLD FRONT WILL CONTINUE
MOVING EAST ACROSS SW IDAHO WITH STRONG W-NW WINDS BEHIND THE
FRONT. SURFACE WINDS W-NW 20-30 KT WITH GUSTS 30-40 KT BEHIND
THE FRONT. STRONGEST GUSTS 40-50 KT NEAR KMUO, KTWF, AND KJER.
WINDS ALOFT AT 10KFT MSL: SSW 20-25 KT, THEN W-NW 25-30 KT AFTER
THU/00Z
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.
WIND ADVISORY UNTIL 6 PM MDT /5 PM PDT/ THIS EVENING FOR
ORZ061-063.
WWW.WEATHER.GOV/BOISE
INTERACT WITH US VIA SOCIAL MEDIA:
WWW.FACEBOOK.COM/NWSBOISE
WWW.X.COM/NWSBOISE
SHORT TERM...JM
LONG TERM....TL
AVIATION.....TL
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