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.
LV
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