183
NOUS43 KUNR 131738
PNSUNR
WYZ057-140545-

Public Information Statement
National Weather Service Rapid City SD
1138 AM MDT Fri Sep 13 2024

...NWS Damage Survey for 08/19/2024 Tornado Event north of Warren
Peak in the Bear Lodge Mountains...

.Overview...In the afternoon of August 19 2024, a supercell
thunderstorm developed over northeast Wyoming, causing extensive
wind and hail damage as it tracked directly over Devils Tower
National Monument. As the storm tracked a bit further east, a rain
wrapped tornado developed early in the evening about half way
between Hulett and Warren Peak in the Bear Lodge Mountains. Numerous
pine trees were either uprooted or snapped in half along a path just
over 2.5 miles long. The estimated damage width was over 1/4 mile in
some areas, although some of this damage on the southern edge of the
tornado was more consistent with straight line winds, so the
estimated maximum tornado width was 300 yards. The tornado was on
the ground for approximately 10 minutes with a speed of
approximately 15 to 20 mph.

.UNR-2024-0819-Bearlodge...

Rating:                 EF1
Estimated Peak Wind:    110 mph
Path Length /statute/:  2.67 miles
Path Width /maximum/:   300 yards
Fatalities:             0
Injuries:               0

Start Date:             08/19/2024
Start Time:             06:12 PM MDT
Start Location:         8 SSW Alva / Crook County / WY
Start Lat/Lon:          44.5776 / -104.4974

End Date:               08/19/2024
End Time:               06:22 PM MDT
End Location:           8 S Alva / Crook County / WY
End Lat/Lon:            44.5693 / -104.4477

Survey Summary:
Some of the damage on the southern edge of the tornado path was
more consistent with RFD (rear flank downdraft) winds. Many photos
and videos of the storm damage were provided via USFS drone
footage and greatly helped with this survey.

&&

EF Scale: The Enhanced Fujita Scale classifies tornadoes into the
following categories:

EF0.....65 to 85 mph
EF1.....86 to 110 mph
EF2.....111 to 135 mph
EF3.....136 to 165 mph
EF4.....166 to 200 mph
EF5.....>200 mph

NOTE:
The information in this statement is preliminary and subject to
change pending final review of the event and publication in
NWS Storm Data.


$$