182 
NWUS55 KRIW 281931
LSRRIW

Preliminary Local Storm Report
National Weather Service Riverton WY
131 PM MDT Tue Oct 28 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0135 PM     Tornado          2 ESE Alta              43.74N 110.99W
10/15/2025                   Teton              WY   Law Enforcement  

            Delayed Report. On 10/15/25 from 1:35 to 
            1:37 PM MDT, a thunderstorm produced an EF1 
            tornado near Alta, WY in the Teton Canyon 
            portion of the Caribou-Targhee National 
            Forest. Reports from social media after the 
            event mentioned tree damage in the Teton 
            Canyon area. Later drone footage taken by 
            the local sheriffs office during the week 
            after this event (as well as satellite 
            imagery) identified a swath of tree damage 
            consistent with 87-104 mph winds. Wind speed 
            was determined using the Enhanced Fujita 
            Scale Damage Indicator for Softwood Trees, 
            classifying this tornado as an EF1 tornado. 
            The tornado damage path is approximately 1.0 
            miles long, with a maximum width of 125 
            yards. The tornado damage path started at an 
            elevation of 7900 ft ASL and ended around 
            6900 ft. 


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LV