July 12th southeast Kansas severe storms

Powerful Summer Storms Plow through Southeast Kansas

July 12th 2010

Stronger than normal upper level winds from an associated weather system moved across Kansas on July 12th 2010. The combination of the stronger winds aloft and unstable July air set the stage for significant severe weather. A powerful thunderstorm developed over Southeast Kansas around 7pm and marched southeast across Montgomery and Labette counties producing widespread wind damage with winds speeds of 60 to 75 mph from Cherryvale to Oswego. Several very large tree limbs and power line poles were knocked down.

Water Vapor Imagery at 7:15 PM shows a strong shortwave moving through western Kansas which helped ignite storms across southern Kansas and Oklahoma.

Montgomery & Labette County Supercell

A strong and eventually severe supercell thunderstorm matured over Elk and Wilson county and moved eastward and eventually moved southeastward over Montgomery and Labette counties. As it moved across northeast Montgomery county it began producing strong straight line winds causing damage to trees and buildings. In fact, the winds broke several large tree limbs...some of which were 10 to 15 inches in diameter as well as damage to a barn roof. As it moved into Labette county, it started to strengthen, with 75 mph winds reported in Oswego as the storm produced a swath of damage located from south of highway 400 and north of highway 160. This damage included power lines, trees, and poles down as well as several power outages. The storm eventually moved into Cherokee county, Kansas and Ottawa County, Oklahoma and evolved into a bow echo.

Pictures

Roof damage to a barn in Cherryvale. Picture by M. Dennis.

Large Tree snaps in half in east Cherryvale. Picture by M. Dennis.

Straight line Wind Damage across Cherryvale. Picture by M. Dennis.

Web Cam Image of Parsons as Supercell went through.

Tree damage in Cherryvale. Picture provided by M. Dennis.

Radar & Satellite Imagery

Radar Imagery of the supercell at 7:15 PM on the border of Montgomery and Labette Counties.

Overshooting top is shown in visible satellite imagery at 7:15 PM, the anvil is spreading out into north-central Missouri.

South Central Kansas

At around 3:20 PM, a quasi-stationary boundary that was draped over southern Kansas began to move northward. This movement combined with heating from the day and the limited cap allowed for storms to develop. As the clouds grew at an substantial rate, a funnel cloud was reported in Greenwood county. These storms turned into a cluster of storms which produced some heavy rain across Butler and Marion Counties.

All Storm Reports Received Through 1100PM Monday

  NWUS53 KICT 130402 
  LSRICT 
   
  PRELIMINARY LOCAL STORM REPORT...SUMMARY 
  NATIONAL WEATHER SERVICE WICHITA KS 
  1101 PM CDT MON JUL 12 2010 
   
  ..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON... 
  ..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE.... 
              ..REMARKS.. 
   
  0326 PM     FUNNEL CLOUD     5 W EUREKA              37.82N 96.38W  
  07/12/2010                   GREENWOOD          KS   LAW ENFORCEMENT  
   
  0441 PM     HEAVY RAIN       10 N EL DORADO          37.97N 96.86W  
  07/12/2010  M2.00 INCH       BUTLER             KS   EMERGENCY MNGR   
   
  0615 PM     HEAVY RAIN       BURNS                   38.09N 96.89W  
  07/12/2010  M2.40 INCH       MARION             KS   CO-OP OBSERVER   
   
              STORM TOTAL.  
   
  0715 PM     TSTM WND DMG     CHERRYVALE              37.27N 95.55W  
  07/12/2010                   MONTGOMERY         KS   EMERGENCY MNGR   
   
              A BARN LOST ITS ROOF.  
   
  0715 PM     TSTM WND DMG     CHERRYVALE              37.27N 95.55W  
  07/12/2010                   MONTGOMERY         KS   LAW ENFORCEMENT  
   
              THUNDERSTORMS WITH SEVERE WIND GUSTS BROKE SEVERAL LARGE  
              TREE LIMBS SOME OF WHICH WERE 10 TO 15 INCHES IN  
              DIAMETER. AT LEAST 1 POWERPOLE WAS KNOCKED DOWN.  
   
  0715 PM     TSTM WND DMG     8 NW MOUND VALLEY       37.29N 95.51W  
  07/12/2010                   LABETTE            KS   EMERGENCY MNGR   
   
              POWER POLES AND TREES WERE KNOCKED DOWN IN A 4 TO 5 MILE  
              WIDE SWATH AROUND THE BIG HILL LAKE AREA. SOME ROOF  
              DAMAGE WAS ALSO REPORTED.  
   
  0730 PM     TSTM WND DMG     1 SSE PARSONS           37.31N 95.29W  
  07/12/2010                   LABETTE            KS   TRAINED SPOTTER  
   
              BLEW A LARGE GRILL OFF OF A DECK AND SEVERAL TREE LIMBS  
              DOWN.  
   
  0745 PM     TSTM WND DMG     5 N MOUND VALLEY        37.28N 95.40W  
  07/12/2010                   LABETTE            KS   EMERGENCY MNGR   
   
              SWATH OF WIND DAMAGE LOCATED S OF HIGHWAY 400 AND NORTH  
              OF HIGHWAY 160. REPORTS OF POWER LINES...TREES...AND  
              POLES DOWN. POWER OUTAGES LOCATED IN SEVERAL CITIES.  
   
  0803 PM     TSTM WND GST     OSWEGO                  37.17N 95.11W  
  07/12/2010  M70.00 MPH       LABETTE            KS   EMERGENCY MNGR   
   
  0934 PM     TSTM WND GST     ARGONIA                 37.27N 97.76W  
  07/12/2010  M57.00 MPH       SUMNER             KS   MESONET          
   
              MEASURED BY KSN WEATHER LAB.  
   
  0935 PM     TSTM WND GST     6 SE NORWICH            37.40N 97.76W  
  07/12/2010  E50.00 MPH       SUMNER             KS   TRAINED SPOTTER  
   
  0943 PM     TSTM WND GST     1 S PERTH               37.16N 97.49W  
  07/12/2010  E60.00 MPH       SUMNER             KS   TRAINED SPOTTER  
   
  1003 PM     HAIL             WELLINGTON              37.27N 97.40W  
  07/12/2010  E1.00 INCH       SUMNER             KS   LAW ENFORCEMENT  
   
  1015 PM     FLOOD            5 N BENEDICT            37.70N 95.74W  
  07/12/2010                   WILSON             KS   LAW ENFORCEMENT  
   
              COUNTY REPORTS SEVERAL COUNTY ROADS ARE STILL COVERED  
              WITH WATER.  
   
  1028 PM     FLOOD            WELLINGTON              37.27N 97.40W  
  07/12/2010                   SUMNER             KS   LAW ENFORCEMENT  
   
              15TH STREET BETWEEN WASHINGTON AND JEFFERSON ROADS IS  
              BEING BARRICADED.  
   
   
  && 
   
  $$