June 20th Preliminary Tornado Summary (Updated 530pm Thursday)

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June 20, 2011

Severe Weather Event

Several Tornadoes and Large Hail


The photo at the right was taken 5 miles south of Elm Creek just east of Hwy 183. Photo Courtesy of Bryce Kintigh

Click On Photos To Enlarge

 

5 miles south of Elm Creek, just east of Hwy 183. (Photo courtesy of Bryce Kintigh)

 5 miles south of Elm Creek, just east of Hwy 183. (Photo courtesy of Bryce Kintigh)

Tornado near Bradshaw. 
(Photo courtesy of Brett Lyons)

5 miles south of Elm Creek, just east of Hwy 183. (Photo courtesy of Bryce Kintigh)

5 miles south of Elm Creek, just east of Hwy 183. (Photo courtesy of Bryce Kintigh)

West of Osceola on Highway 92.
(Photo courtesy of Greg Dumas)

     

Specific Tornado Pages (Additional Pages will be coming soon)

EF-3 Buffalo County near Amherst

EF-3 4 Miles East of Polk on Highway 66

Preliminary Severe Weather Summary:

(All Information Current as of 400 PM Thursday. Tornado damage survey crews have determined preliminary tornado ratings and locations for all reported tornadoes.)

 ...CONFIRMED TORNADOES TRACKED ACROSS PARTS OF SOUTH CENTRAL
NEBRASKA JUNE 20TH...

A SEASONABLY STRONG LOW PRESSURE SYSTEM CENTERED NEAR THE NEBRASKA
AND KANSAS BORDER RESULTED IN SEVERAL TORNADO REPORTS DURING THE
AFTERNOON AND EVENING HOURS ON MONDAY JUNE 20TH ACROSS PORTIONS OF
SOUTH CENTRAL NEBRASKA.

THE INFORMATION FOR THE TORNADOES LISTED BELOW ARE A RESULT OF
NATIONAL WEATHER SERVICE STORM SURVEYS...AS WELL AS REPORTS RECEIVED
FROM VARIOUS SOURCES INCLUDING STORM SPOTTERS...LAW
ENFORCEMENT...EMERGENCY MANAGERS...AND STORM CHASERS.
IT IS IMPORTANT TO NOTE THAT THE INFORMATION IN THIS STATEMENT
REFLECTS THE BEST TORNADO INFORMATION KNOWN AT THIS TIME...BUT
IS SUBJECT TO CHANGE AS MORE DETAILS ARE RECEIVED. REGARDING
TORNADOES NEAR ELM CREEK IN BUFFALO COUNTY...ADDITIONAL DETAILS ARE
EXPECTED TO BE RELEASED ON WEDNESDAY.

ALL INFORMATION SHOULD BE CONSIDERED PRELIMINARY AND SUBJECT TO
CHANGE AS ADDITIONAL INFORMATION BECOMES AVAILABLE. START AND END
POINTS AS WELL AS TIMES ARE APPROXIMATIONS. MORE DETAILS WILL ALSO
BECOME AVAILABLE AT WWW.WEATHER.GOV/HASTINGS OVER THE COMING
DAYS...INCLUDING MORE SPECIFIC INFORMATION ABOUT DAMAGE AND
PICTURES. FINAL AND OFFICIAL TORNADO INTENSITY AND TRACK INFORMATION
WILL EVENTUALLY BE AVAILABLE IN THE JUNE 2011 NCDC STORM DATA
PUBLICATION.

NWS HASTINGS WOULD LIKE TO THANK ALL STORM SPOTTERS...LAW
ENFORCEMENT...EMERGENCY MANAGEMENT PERSONNEL...AND STORM CHASERS WHO
ASSISTED IN PROVIDING VALUABLE SEVERE WEATHER AND TORNADO REPORTS
DURING THIS EVENT.

* PHILLIPS COUNTY KANSAS

START/END: 4 MILES W/NW OF LONG ISLAND TO 4 NW OF LONG ISLAND
RATING: EF-1
PATH LENGTH: 2 MILES
MAXIMUM PATH WIDTH: 100 YARDS
MAXIMUM ESTIMATED WIND SPEED: 90 MPH
TIME: 255 PM - 258 PM CDT

* HARLAN COUNTY NEBRASKA

START/END: 6 MILES S OF STAMFORD TO 6 MILES N/NE OF STAMFORD
RATING: EF-1

PATH LENGTH: SKIPPED ALONG A 12 MILE PATH
MAXIMUM PATH WIDTH: 100 YARDS
MAXIMUM ESTIMATED WIND SPEED: 95 MPH
TIME: 305 PM - 332 PM CDT

* PHELPS/BUFFALO COUNTY NEBRASKA   
  
START/END: 6 MILES SSW OF ELM CREEK AND LIFTED JUST BEFORE ELM CREEK  
RATING: EF-0  
PATH LENGTH: 6 MILES  
MAXIMUM PATH WIDTH: 200-300 YARDS  
MAXIMUM ESTIMATED WIND SPEED: 80 MPH  
TIME: 344 PM - 352 PM CDT  
  
* BUFFALO COUNTY NEBRASKA  
 
START/END: BEGAN 1 TO 2 MILES WEST OF ELM CREEK AND MOVED INTO  
           ELM CREEK BEFORE LIFTING 2.5 MILES SW OF AMHERST  
RATING: EF-2  
PATH LENGTH: 8 MILES  
MAXIMUM PATH WIDTH: 1/4 OF A MILE  
MAXIMUM ESTIMATED WIND SPEED: 120 MPH  
TIME: 350 PM - 403 PM CDT  


* BUFFALO COUNTY NEBRASKA

START/END: 2 MILES W OF AMHERST TO 4 MILES N OF AMHERST
RATING: EF-3
PATH LENGTH: 4 MILES
MAXIMUM PATH WIDTH: 3/4 OF A MILE
MAXIMUM ESTIMATED WIND SPEED: 160 MPH
TIME: 412 PM - 430 PM CDT

* BUFFALO COUNTY NEBRASKA

START/END: 3 MILES SE OF PLEASANTON TO 2 MILES E/NE OF PLEASANTON
RATING: EF-0
PATH LENGTH: SKIPPED ALONG A 3 MILE PATH
MAXIMUM PATH WIDTH: 50 YARDS
MAXIMUM ESTIMATED WIND SPEED: 70 MPH
TIME: 425 PM - 440 PM CDT

* SHERMAN COUNTY NEBRASKA

START/END: 6 MILES SW OF ROCKVILLE TO 4 MILES SW OF ROCKVILLE
RATING: EF-2
PATH LENGTH: 2 MILES
MAXIMUM PATH WIDTH: 200 YARDS
MAXIMUM ESTIMATED WIND SPEED: 120 MPH
TIME: 446 PM - 454 PM CDT

* HOWARD COUNTY NEBRASKA

START/END: BRIEF TOUCHDOWN IN A FIELD 5 W/SW OF FARWELL
RATING: EF-0
TIME: 505 PM CDT

* HAMILTON COUNTY

START/END: 6 MILES S/SW HAMPTON TO 4 MILES N/NE HAMPTON
RATING: EF-2
PATH LENGTH: 10 MILES
MAXIMUM PATH WIDTH: 1/4 OF A MILE
MAXIMUM ESTIMATED WIND SPEED: 125 MPH
TIME: 523 PM - 543 PM CDT

* VALLEY COUNTY

START/END: 5 MILES S OF NORTH LOUP TO 4 MILES S OF NORTH LOUP
RATING: EF-1
PATH LENGTH: 1 MILE
MAXIMUM PATH WIDTH: 100 YARDS
MAXIMUM ESTIMATED WIND SPEED: 90 MPH
TIME: 535 PM - 540 PM CDT

* YORK/POLK COUNTY

START/END: 4 MILES SW OF BRADSHAW TO 4 MILES E OF POLK
RATING: EF-2
PATH LENGTH: 17 MILES
MAXIMUM PATH WIDTH: 1/4 OF A MILE
MAXIMUM ESTIMATED WIND SPEED: 130 MPH
TIME: 540 PM - 602 PM CDT

* POLK COUNTY

START/END: 4 MILES E OF POLK TO 6 MILES W/NW OF OSCEOLA
RATING: EF-3
PATH LENGTH: 10 MILES
MAXIMUM PATH WIDTH: 1/2 OF A MILE
MAXIMUM ESTIMATED WIND SPEED: 140 MPH
TIME: 602 PM - 622 PM CDT

There were two distinct corridors of tornado-producing storms across the area, one focused west of Highway 281, and another east of Highway 281. There are NO known reports of injuries from these tornadoes. For the western area, two to three distinct supercell storms produced several tornadoes generally along an intermittent track extending from near Long Island, Kansas in Phillips County, north through Stamford, Elm Creek, Pleasanton, and Rockville, Nebraska. Tornadoes were reported in Furnas, Harlan, Phelps, Buffalo, Sherman, Howard and Valley Counties. Some of these tornadoes were reported to be weak and brief, while others such as those near Elm Creek and Amherst in Buffalo County were reported to be strong with damage reported. This activity started near Long Island Kansas around 3:00 PM, with one of the last tornadoes reported near Rockville in Sherman County around 5:00 PM. Again, these were not continuous tornado tracks.

Here are a few of the preliminary damage reports, as relayed by the county officials:

In Harlan County, damage was reported two miles north of Stamford. A quonset hut and outbuildings were destroyed, windows were broken and there was crop damage.

In Phelps County, approximately 16 miles northeast of Bertrand, irrigation pipes were hanging from power lines, pivots were overturned and outbuildings damaged. A grain bin was wrapped around a power pole.

In Buffalo County, just west of Elm Creek, pivots were overturned, power lines were downed and trees were damaged. In Elm Creek, a roof was partially removed from one house, a second house received major roof damage, while several other houses in town sustained roof damage as well. Metal buildings on the outskirts of town were demolished. Between Elm Creek to northwest of Amherst, several houses received major damage, transmission lines were downed, center pivots, and trees were destroyed. North of Ravenna, a farmstead sustained damage to the house, shed and outbuildings.

Little damage was reported in Furnas and Sherman counties. However, a tornado affected the Davis Creek Reservoir campground in extreme southeast Valley County around 535 PM, with considerable tree damage and some structural damage.

For the eastern area, a supercell storm became tornadic in the Stockham, Hampton, and Bradshaw areas around 5:20 PM, and produced tornadoes northward through the western Polk County area until 6:20 PM, when one of the last tornado reports was received northwest of Osceola. The first tornado reported in this area likely crossed Interstate 80 near the Hampton exit, and dissipated as it moved north of Hampton. A second, and longer tracked tornado touched down near Bradshaw around 5:40 PM, and remained on the ground for several miles northward into western Polk County.

Preliminary tornado damage for the eastern area is listed by county below as relayed by county officials:

In Hamilton County, tornado damage was reported from southwest of Hampton to approximately 4 miles north of Hampton. Homes sustained roof damage, pivots were destroyed, and irrigation pipe was wrapped around poles.

In Merrick County, south of Silver Creek near the Merrick and Polk County line, damage was reported to trees and grain bins.

In Polk County, approximately 4 miles east of Polk on the north side of Highway 66, a farmstead was damaged. Trees, pivots, and power poles were also damaged. A semi was overturned and a combine was blown into a field. On the south side of the highway, a barn was damaged. Approximately 10 miles south of Silver Creek, a house sustained major damage and a transmission tower was downed.

Again, all of this information should be considered preliminary at this time, and confirmation of actual tornado tracks and tornado damage will be investigated and reported over the course of the next few days. As tornado tracks and intensities are confirmed, this information will be posted on our website.

NWS Hastings would like to thank all storm spotters, law enforcement, emergency management personnel, and storm chasers who assisted in providing valuable severe weather and tornado reports during this event.

 

Click Radar Images To Enlarge 

Radar reflectivity with hook echo 2 miles NW of Bradshaw at 549 PM. EF-2 tornado in progress Radar storm relative velocity showing strong circulation (red away from radar, green toward) at 549 PM
   
   
Radar reflectivity with "donut hole" in hook echo approx. 2 miles NW of Amherst at 426 PM Very INTENSE storm relative velocity signature approx. 2 miles NW of Amherst at 426 PM
   
 The radar loop to the left shows the evolution of thunderstorm activity across south central Nebraska and north central Kansas during the afternoon and evening hours of June 20.

 

For an interactive listing of the PRELIMINARY storm reports, please click the linked image below. 

June 20, 2011 Storm Reports.
Click image for detailed reports.

This page was composed by the staff at the National Weather Service in Hastings, Nebraska.



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