Severe Thunderstorm Warning 21, NWS Boise, ID

612 
WWUS55 KBOI 020009
SVSBOI

Severe Weather Statement
National Weather Service Boise ID
609 PM MDT Fri Aug 1 2025

IDC073-020018-
/O.CAN.KBOI.SV.W.0021.000000T0000Z-250802T0045Z/
Owyhee ID-
609 PM MDT Fri Aug 1 2025

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL OWYHEE COUNTY IS
CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

When safe to do so, please relay storm reports to the National
Weather Service in Boise via local law enforcement, or National
Weather Service Boise Facebook and Twitter accounts.

&&

LAT...LON 4237 11542 4262 11526 4247 11503 4243 11504
      4227 11524
TIME...MOT...LOC 0006Z 226DEG 9KT 4238 11525 

$$

BW

Area Forecast Discussion
National Weather Service Boise ID
247 PM MDT Fri Aug 1 2025

.SHORT TERM...Tonight through Sunday night...We'll see another
round of showers and thunderstorms on Saturday. The focus of
develop will be across SE Oregon and SW Idaho south of the Snake
Plain as a minor wave tracks through the northern Great Basin. A
slightly warmer and drier air mass near the surface will
increase the outflow wind gust threat up to 50 mph, compared to
today's 30-40 mph potential while a weak shear environment will
result in mostly short-lived smaller storms. A deeper upper
trough and surface front will approach the region on Sunday
placing SE Oregon in a favorable position for shower and
thunderstorm development. A more robust environment ahead of the
trough would increase the chance for stronger thunderstorms to
develop. Southeast Oregon will see its somewhat common late
afternoon/evening wind push which will likely be enhanced by
the cold front and outflow from upstream showers/storms Sunday
evening. Typically windy locations, to include the I-84
corridor in Baker County along with northern Harney and Malheur
counties will see stronger winds Sunday evening. Temperatures
are at or slightly below normal through Sunday, even as the
average temperatures starts to drop after today. Smoke will hang
around with varying coverage.

.LONG TERM...Monday through Friday...High guidance confidence
remains over a shortwave trough digging across the Pacific
Northwest and Upper Great Basin through Monday. Isolated
showers/thunderstorms are expected to continue Monday, mostly
over Eastern OR and West- Central ID. The frontal passage is
also expected to bring a cooling trend on Monday, dropping peak
valley temperatures into the lower to mid 80s and mountain
temperatures into the 60s/70s. Tuesday and Wednesday will see a
large high pressure ridge over the Four Corners region build
into the area, returning a warming and drying trend. Tuesday
will see valley daytime temperatures climb back up into the
upper 80s and Wednesday into the lower 90s. Guidance uncertainty
remains over a longwave trough moving into the Northwest region
on Thursday and Friday. For now, conditions are tentatively on
the warmer and drier side towards the end of the extended
forecast period.

&&

.AVIATION...Mostly VFR. Wildfire smoke may create brief
MVFR conditions. Isolated to scattered showers/thunderstorms
developing through the afternoon/early evening, mainly over E'rn
OR, W-Central ID, and Magic Valley sites. Thunderstorms capable
of heavy rain, small hail, 30-40 kt outflows, and brief MVFR
conditions. Mtns obscured in precip and smoke. Surface winds
outside of outflows: SW-NW 5-15 kt this afternoon. Winds aloft
at 10kft MSL: S-SW 10-20 kt.

KBOI...Mostly VFR. Wildfire smoke could briefly reduce
visibility in the morning/early afternoon. Surface winds: W-NW
5-10 kt, with weak outflow gusts up to 20 kt possible late
afternoon/early evening.

Weekend Outlook: Isolated showers/thunderstorms across Baker
County and higher terrain in SW Idaho Saturday/Sunday.
Thunderstorms capable of 30-40 kt outflows, and heavy rain
resulting in MVFR conditions and mountain obscuration. Surface
winds outside of outflows: NW-SW 5-15 kt each afternoon,
variable 5-10 kt over nights.

&&

.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...DG
LONG TERM....JY
AVIATION.....JY

Special Weather Statement
National Weather Service Boise ID
529 PM MDT Fri Aug 1 2025

IDZ014-015-030-020015-
Southern Twin  Falls County ID-Upper Treasure Valley ID-
Southwest Highlands ID-
529 PM MDT Fri Aug 1 2025

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL TWIN FALLS AND
SOUTHEASTERN OWYHEE COUNTIES THROUGH 615 PM MDT...

At 529 PM MDT, Doppler radar was tracking a strong thunderstorm over
Juniper Butte, or 30 miles north of Jarbidge, moving northeast at 15
mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Areas of blowing dust reducing
         visibilities. Minor damage to outdoor objects is possible.

This strong thunderstorm will be near...
  Coonskin Butte around 540 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4229 11546 4260 11516 4244 11487 4218 11520
TIME...MOT...LOC 2329Z 216DEG 15KT 4230 11524

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

BW