Convective Wind Damage
August 30th, 2010

Severe thunderstorms caused convective wind damage on Monday, August 30th - as they marched across western and north central Nebraska.  Wind damage was reported in Frontier, Custer, Brown, Blaine, Holt, and Boyd counties. The wind damage occurred in two main swaths. One began in southwestern Nebraska around McCook and Stockville, and extended northeast past Lexington and Broken Bow, Brewster, Burwell, Chambers, O'Neill, and Lynch, and then continued all the way into South Dakota. The storms covered that distance of over 200 miles in only four hours. Wind gusts of 50 to 70 mph were common along that line.

The second swath of damaging winds caused the most significant damage of the event in Ainsworth, in Brown County. Trees and power lines were blown down by winds estimated to be 80 miles an hour by law enforcement personnel.  A storage barn and a horse barn were completely destroyed by the ferocious winds. More information on the damage in Ainsworth and the results from a National Weather Service damage survey are available here.

Below are some radar animations of reflectivity and velocity from the KLNX Doppler radar in Thedford, along with an animation from the Iowa Mesonet depicting storm evolution, warning polygons and preliminary local storm reports. Finally, a summary of local storm reports received by the National Weather Service is also enclosed below.


Base Reflectivity Loop

Base Velocity Loop

 Iowa Mesonet Animation of radar, warning and watch polygons, and local storm reports
(Iowa Mesonet animation of radar, warning and watch polygons, and local storm reports)
Google Earth Professional view of local storm reports
(Google Earth Professional view of local storm reports from August 30th, 2010)

Tree damage in Taylor.  Image Courtesy of Nebraska Emergency Management.

2 Car Garage destroyed west of Weissart. Images courtesy of the Connelys.

              Destroyed 2 Car                Garage sideview

Destroyed garage roof displaced to north

PRELIMINARY LOCAL STORM REPORT...SUMMARY  
NATIONAL WEATHER SERVICE NORTH PLATTE NE  
420 PM CDT TUE AUG 31 2010  
   
.TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON  
   
.DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE.
 
 
            ..REMARKS..  
 
0325 PM     TSTM WND GST     STOCKVILLE              40.53N 100.38W  
08/30/2010  E60.00 MPH       FRONTIER           NE   PUBLIC            
 
            THE WINDS DOWNED TREE BRANCHES AT LEAST 4 INCHES IN   
            DIAMETER.  
 
0330 PM     TSTM WND DMG     CURTIS                  40.63N 100.51W  
08/30/2010                   FRONTIER           NE   TRAINED SPOTTER   
 
            FOUR TO EIGHT INCH DIAMETER TREE BRANCHES WERE DOWNED BY   
            THUNDERSTORM WINDS.  
 
0425 PM     TSTM WND GST     5 SE OCONTO             41.09N 99.69W   
08/30/2010  E50.00 MPH       CUSTER             NE   PUBLIC            
 
0430 PM     TSTM WND DMG     WEISSERT                41.47N 99.45W   
08/30/2010                   CUSTER             NE   NEWSPAPER         
 
            A GARAGE WAS LEVELED WITH THE ROOF BLOWN 100 YDS TO THE   
            NORTH. THE SIDING WAS WRAPPED AROUND TREES. THE REST OF   
            THE BUILDING WAS LAYING ON THE GROUND IN A PILE. A SCHOOL  
            BUS DRIVER IN THE SAME AREA EXPERIENCED BLINDING   
            HORIZONTAL RAIN.  
 
0430 PM     TSTM WND DMG     WEISSERT                41.47N 99.45W   
08/30/2010                   CUSTER             NE   NEWSPAPER         
 
            A MICROBURST FLATTENED A CORN FIELD ON ONE SIDE OF THE   
            ROAD AND LEFT THE CORN ON THE OTHER SIDE OF THE ROAD   
            STILL STANDING. A HOMEOWNERS GARDEN WAS LEVELED BY HIGH   
            WINDS.  
 
0440 PM     TSTM WND GST     AINSWORTH               42.55N 99.86W   
08/30/2010  E80.00 MPH       BROWN              NE   LAW ENFORCEMENT   
 
            THE THUNDERSTORM WINDS PRODUCED CONSIDERABLE DAMAGE IN   
            AND NEAR AINSWORTH...INCLUDING THE DESTRUCTION OF BOTH A   
            90 FT BY 30 FT HORSE BARN AND A SEPARATE STORAGE BARN.   
            TREES AND POWER LINES WERE DOWNED...AND THE COMMUNITY WAS  
            WITHOUT POWER FOR ABOUT 2 HOURS.  
 
0442 PM     TSTM WND GST     BROKEN BOW              41.41N 99.64W   
08/30/2010  M52.00 MPH       CUSTER             NE   ASOS              
 
0443 PM     HAIL             AINSWORTH               42.55N 99.86W   
08/30/2010  M1.00 INCH       BROWN              NE   LAW ENFORCEMENT   
 
0510 PM     TSTM WND GST     8 NE BREWSTER           42.02N 99.75W   
08/30/2010  E60.00 MPH       BLAINE             NE   PUBLIC            
 
0517 PM     TSTM WND GST     1 SW MILLS              42.93N 99.41W   
08/30/2010  E60.00 MPH       KEYA PAHA          NE   PUBLIC            
 
            WINDS ESTIMATED 50 TO 60 MPH.  
 
0517 PM     HAIL             1 SW MILLS              42.93N 99.41W   
08/30/2010  M1.00 INCH       KEYA PAHA          NE   PUBLIC            
 
0545 PM     TSTM WND GST     7 SW AMELIA             42.16N 99.06W   
08/30/2010  E50.00 MPH       HOLT               NE   PUBLIC            
 
            WINDS ESTIMATED AT 45 TO 50 MPH.  
 
0545 PM     TSTM WND GST     3 W AMELIA              42.23N 99.02W   
08/30/2010  E50.00 MPH       HOLT               NE   PUBLIC            
 
            WINDS ESTIMATED TO 50 MPH.  
 
0550 PM     TSTM WND GST     14 NNE BURWELL          41.97N 99.03W   
08/30/2010  E60.00 MPH       GARFIELD           NE   PUBLIC            
 
            STRONG WINDS AT 50 TO 60 MPH WRAPPED TIN AROUND A POST.  
 
0610 PM     TSTM WND GST     ONEILL                  42.46N 98.65W   
08/30/2010  M60.00 MPH       HOLT               NE   AWOS              
 
0618 PM     TSTM WND GST     6 S CHAMBERS            42.12N 98.75W   
08/30/2010  E70.00 MPH       HOLT               NE   FIRE DEPT/RESCUE  
 
0642 PM     TSTM WND GST     LYNCH                   42.83N 98.47W   
08/30/2010  E60.00 MPH       BOYD               NE   PUBLIC            
 
0720 PM     TSTM WND GST     VALENTINE               42.87N 100.55W  
08/30/2010  M49.00 MPH       CHERRY             NE   ASOS              
 
0600 AM     HEAVY RAIN       BUTTE                   42.91N 98.85W   
08/31/2010  M1.60 INCH       BOYD               NE   CO-OP OBSERVER    
 
            24 HOUR STORM TOTAL RAINFALL AMOUNT ENDING AT 700 AM CDT   
            FROM COOPERATIVE WEATHER OBSERVER.   
 
0700 AM     HEAVY RAIN       LYNCH                   42.83N 98.47W   
08/31/2010  M1.00 INCH       BOYD               NE   CO-OP OBSERVER    
 
            STORM TOTAL RAINFALL AMOUNT ENDING AT 700 AM CDT AS   
            REPORTED BY COOPERATIVE WEATHER OBSERVER.   
 
0700 AM     HEAVY RAIN       4 NNE BERWYN            41.40N 99.47W   
08/31/2010  M1.00 INCH       CUSTER             NE   MESONET           
 
            24 HOUR STORM TOTAL RAINFALL AMOUNT ENDING AT 700 AM CDT.  
            REPORT WAS FURNISHED BY A NEBRASKA RAINFALL ASSESSMENT   
            AND INFORMATION NETWORK OBSERVER.   
 
0700 AM     HEAVY RAIN       16 ESE LONG PINE        42.45N 99.41W   
08/31/2010  M1.43 INCH       ROCK               NE   MESONET           
 
            24 HOUR STORM TOTAL RAINFALL AMOUNT ENDING AT 700 AM CDT.  
            REPORT WAS FURNISHED BY A NEBRASKA RAINFALL ASSESSMENT   
            AND INFORMATION NETWORK OBSERVER.   
 
0700 AM     HEAVY RAIN       AINSWORTH               42.55N 99.86W   
08/31/2010  M1.25 INCH       BROWN              NE   CO-OP OBSERVER    
 
            24 HOUR STORM TOTAL RAINFALL AMOUNT OF 1.25 INCHES AS   
            REPORTED BY A COOPERATIVE WEATHER OBSERVER.   
 
0700 AM     HEAVY RAIN       1 E GROSS               42.95N 98.55W   
08/31/2010  M1.61 INCH       BOYD               NE   CO-OP OBSERVER    

Page composition
by
Steve Carmel


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.