WWUS85 KRIW 232343
SPSRIW

Special Weather Statement
National Weather Service Riverton WY
543 PM MDT Sun Aug 23 2026
 
WYZ001-240015-
Yellowstone National Park-
543 PM MDT Sun Aug 23 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN PARK COUNTY THROUGH
615 PM MDT...

At 543 PM MDT, Doppler radar was tracking a strong thunderstorm near
Gallatin Lake, which is 11 miles northeast of West Yellowstone,
moving east at 30 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. Minor hail damage to vegetation is 
         possible.

This strong thunderstorm will be near...
  Gallatin Lake around 550 PM MDT.
  Grizzly Lake around 600 PM MDT.

Other locations in the path of this storm include Obsidian Cliff and
Twin Lakes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building. 

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

LAT...LON 4500 11077 4499 11070 4499 11058 4473 11055
      4467 11105 4500 11106
TIME...MOT...LOC 2343Z 262DEG 24KT 4481 11099 

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

$$

Dziewaltowski