042  
NOUS45 KCYS 120139  
PNSCYS  
 
PUBLIC INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE CHEYENNE, WY  
739 PM MDT FRI MAY 11 2018  
   
..NWS DAMAGE SURVEY FOR 05/10/18 THUNDERSTORM WIND EVENT
 
 
   
OVERVIEW
 
 
DAMAGE CONSISTENT WITH STRAIGHT-LINE WINDS WAS OBSERVED ACROSS  
SOUTH CENTRAL MORRILL COUNTY BY A NWS ASSESSMENT TEAM ON FRIDAY,  
05/11/18. THESE STRAIGHT-LINE WINDS OCCURRED IN AN AREA OF THE  
SUPERCELL THUNDERSTORM CALLED THE REAR FLANK DOWNDRAFT. THE  
BEGINNING LOCATION OF DAMAGE WAS SURVEYED NEAR THE HIGHWAY 385 AND  
HIGHWAY 92 INTERCHANGE, WHERE A TRACTOR-TRAILER WAS OVERTURNED  
AND ONE UNSECURED MOBILE HOME WAS TIPPED. FARTHER EAST ALONG  
HIGHWAY 92, A LARGE FARM IMPLEMENT STORAGE SHED WAS COMPLETELY  
DESTROYED. THE DAMAGE PATH OF STRAIGHT-LINE WINDS CONTINUED INTO  
BROADWATER, NEBRASKA WHERE SIGNIFICANT TREE DAMAGE WAS ASSESSED.  
NUMEROUS IRRIGATION CENTER-PIVOTS WERE TIPPED ALONG WITH MANY  
DOWNED POWER POLES. IT IS IMPORTANT TO NOTE THAT THE DAMAGE PATTERN  
IN ALL OF THESE CASES WAS FROM THE WEST TOWARDS THE EAST, CONSISTENT  
WITH STRAIGHT LINE WIND DAMAGE. THERE WAS NO INDICATION OF A  
ROTATIONAL PATTERN IN ANY OF THE DAMAGE THAT WAS SURVEYED. EVEN SO,  
BRIEF TORNADOES COULD STILL HAVE OCCURRED OVER OPEN PRAIRIE WITH  
THIS THUNDERSTORM, THEY JUST DID NOT PRODUCE ANY DAMAGE AND THUS WAS  
NOT ABLE TO BE ASSESSED.  
   
BROADWATER NEBRASKA THUNDERSTORM WIND
 
 
PEAK WIND /E/ : 80-100 MPH  
PATH LENGTH /STATUTE/: 8 MILES  
PATH WIDTH /MAXIMUM/: 2 MILES  
FATALITIES: 0  
INJURIES: 0  
 
START DATE: 05 10 2018  
START TIME: 1700 MDT  
START LOCATION: 7.5 MILES WEST OF BROADWATER  
START LAT/LON: 41.60635 / -102.99461  
 
END DATE: 05 10 2018  
END TIME: 1730 MDT  
END LOCATION: 1 MILE EAST OF BROADWATER  
END LAT/LON: 41.59099 / -102.82788  
 
NOTE:  
THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO  
CHANGE PENDING FINAL REVIEW OF THE EVENT AND PUBLICATION IN  
NWS STORM DATA.  
 

 
 
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