July 6 2019 Bosler, Wyoming Tornado Statement

Overview

During the afternoon of July 6th, 2019, a supercell thunderstorm produced a tornado near Bosler, Wyoming The tornado was observed by multiple storm chasers and law enforcement officials with reports of it crossing Highway 30 just south of Bosler at 6:18 PM MDT. The tornado caused complete destruction of a pole barn in addition to snapping several wooden power poles. A NWS survey team present their findings below for this EF-1 tornado.  

000
NOUS45 KCYS 090143
PNSCYS
NEZ002-003-019>021-054-055-095-096-WYZ101>119-091345-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE, WY
743 PM MDT MON JUL 8 2019

...NWS DAMAGE SURVEY FOR 07/06/2019 TORNADO EVENT NEAR BOSLER
WYOMING... 

A SUPERCELL THUNDERSTORM DEVELOPED DURING THE LATE AFTERNOON ON
JULY 6 NEAR THE TOWN OF ROCK RIVER, WYOMING, IN WEST-CENTRAL
ALBANY COUNTY. THE STORM RAPIDLY INTENSIFIED AS IT MOVED TO THE
SOUTHEAST, PROMPTING A TORNADO WARNING AT 6:06 PM MDT. A TORNADO
WAS REPORTED CROSSING HIGHWAY 30 JUST SOUTH OF BOSLER AT 6:18 PM
MDT, DISSIPATING SHORTLY THEREAFTER. THE SUPERCELL CONTINUED TO 
SHOW SIGNS OF ROTATION AS IT MOVED EAST-SOUTHEAST TOWARD THE 
LARAMIE COUNTY LINE, BUT NO ADDITIONAL TORNADOES WERE REPORTED.

A SURVEY TEAM FROM THE NATIONAL WEATHER SERVICE IN CHEYENNE MET
WITH OFFICIALS FROM ALBANY COUNTY TO INVESTIGATE REPORTED STORM
DAMAGE IN THE BOSLER AREA. EYE-WITNESS REPORTS AND SNAPPED WOOD
POWER POLES ALONG COUNTY ROAD 51 INDICATED THE INITIAL TORNADO
TOUCHED DOWN AROUND 6:10 PM IN AN OPEN FIELD ABOUT 2.5 MILES WSW
OF BOSLER, OR 18.5 MILES NNW OF LARAMIE. THE TORNADO LIFTED FOR
A SHORT TIME BUT DESCENDED AGAIN CAUSING COMPLETE DESTRUCTION 
OF A POLE BARN NEAR HIGHWAY 30 ABOUT 3 MILES SOUTH-SOUTHEAST OF 
BOSLER. THE TORNADO THEN CROSSED HIGHWAY 30, AS WAS CONFIRMED WITH
AERIAL PHOTOGRAPHS PROVIDED BY THE CITY OF LARAMIE, WHICH SHOWED 
LARGE PIECES OF WARPED METAL SEVERAL HUNDRED YARDS TO THE EAST OF 
THE HIGHWAY IN A WIDE SWATH. THE DAMAGE FOOTPRINT ENDED HERE, NEAR
THE POINT OF THE ORIGINAL REPORT OF A BRIEF TORNADO. THE TEAM 
CONCLUDED THAT THE TORNADO DAMAGE WAS CONSISTENT WITH AN EF-1 
TORNADO WITH MAXIMUM WINDS AROUND 100 MPH. 

.BOSLER, WYOMING TORNADO... 

RATING:                 EF-1
ESTIMATED PEAK WIND:    100 MPH
PATH LENGTH /STATUTE/:  4 MILES (NON-CONTINUOUS) 
PATH WIDTH /MAXIMUM/:   500 YARDS
FATALITIES:             0
INJURIES:               0

START DATE:             07/06/2019 
START TIME:             6:10 PM MDT 
START LOCATION:         2.5 WSW BOSLER - ALBANY COUNTY 
START LAT/LON:          41.5556, -105.7349

END DATE:               07/06/2019
END TIME:               6:19 PM MDT 
END LOCATION:           3.3 SSE BOSLER - ALBANY COUNTY
END_LAT/LON:            41.5341, -105.6636

EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES
TORNADOES INTO THE FOLLOWING CATEGORIES.

EF-0...WEAK......65 TO 85 MPH
EF-1...WEAK......86 TO 110 MPH
EF-2...STRONG....111 TO 135 MPH
EF-3...STRONG....136 TO 165 MPH
EF-4...VIOLENT...166 TO 200 MPH
EF-5...VIOLENT...>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. 

$$

WORLEY/HAMMER/BRAUN

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