The Full Gamut of Severe Weather on Monday July 20th, 2009 (7/21/2009)

By:

The Full Gamut of Severe Weather on Monday July 20th, 2009

By: Jerilyn Billings and Robb Lawson

 

On Monday Evening July 20th, a complex of severe storms developed over Central and Southern Kansas.  A cold front draped southeast across Nebraska and Northwestern Kansas slowly moved southeast while a warm front bisected the Wichita county warning area.  As early morning storms moved eastward the clouds cleared out and surface temperatures increased over Central and South Central Kansas.  Also as the warm front pushed northward, dew points surged into the low 70s increasing the instability with already great wind shear for severe storms.  Storms developed around 6pm along the warm front in South Central Kansas.  These storms quickly intensified and dropped Baseball sized Hail, Winds up to 60 to 70 mph and even a few Tornadoes. 

 

 

 

Storms in Russell and Barton Counties

Radar image of the supercell storm over Barton County.

 

Wall cloud from Barton County supercell. Picture by John Finch

Wall cloud from Barton County supercell. Picture by John Finch

Wall cloud from Barton County supercell. Picture by John Finch

Wall cloud from Barton County supercell. Picture by John Finch

Wall cloud from Barton County supercell. Picture by John Finch

Picture of the weakening supercell over Barton County. Picture by John Finch.

Picture of Left moving split of supercell on the Lincoln/Ellsworth County Line on I-70 near Vesper. Storm produced Golf Ball sized hail. Picture taken by Henry Dehl.

 

Storms in Kingman and Harper Counties

 

Radar image of the intense supercell over Northeast Harper/Southeast Kingman County.

3-D radar image of the storm over Northeast Harper/Southeast Kingman County. Note the core of this storm extending up to around 50,000 ft!

Hail damage to house 3 miles east of Danville. Picture by Lori Drouhard and courtesy KAKE.

Hail 3 miles east of Danville. Picture by Lori Drouhard and courtesy KAKE.

Wall cloud in Northeast Harper County. Picture by Steve and Tonya Drouhard and courtesy KAKE.

Wall cloud in Northeast Harper County. Picture by Steve and Tonya Drouhard and courtesy KAKE.

 

Storms in Butler Counties

 A supercell developed around 9pm and moved southeast over Butler county.  The Supercell's low level rotation significantly increased around 945pm indicating a possible tornado on the ground southwest of Rosalia.  Tornado damage was found about 3 miles southwest of Rosalia.

Radar Reflectivity  Image at 943pm

Radar Velocity Image of Supercell and Tornadic Rotation at 943pm. Note the strong velocity couplet southwest of Rosalia.

Tree damage from a weak tornado southwest of Rosalia.

Tree damage from a weak tornado southwest of Rosalia. Image courtesy Butler County Emergency Management.

Tree damage from a weak tornado southwest of Rosalia. Image courtesy Butler County Emergency Management.

Tree damage from a weak tornado southwest of Rosalia. Image courtesy Butler County Emergency Management.

Tree damage from a weak tornado southwest of Rosalia. Image courtesy Butler County Emergency Management.

Tree damage from a weak tornado southwest of Rosalia. Image courtesy Butler County Emergency Management.

Tree damage from a weak tornado southwest of Rosalia. Image courtesy Butler County Emergency Management.

 

About an hour later a strong line of thunderstorms moved across Sedgwick,  Butler and Cowley counties,  producing strong straight line wind damage with winds greater than 60 mph.

 

href="/images/ict/wxstory/2009/ButlerStraightLineWindsdBZ_0452Z(1).png">

Radar image of the storm that produced the straight-line wind damage near the Shady Creek camp area on El Dorado Lake.

Tree damage from straight-line winds near El Dorado Lake. Image courtesy Butler County Emergency Management.

Tree damage from straight-line winds near El Dorado Lake. Image courtesy Butler County Emergency Management.

Damage to a camper that was overturned at the Shady Creek camp area on El Dorado Lake. Image courtesy Butler County Emergency Management.

Tree damage from straight-line winds near El Dorado Lake. Image courtesy Butler County Emergency Management.

Straight-line wind damage in Northwest Cowley County.

 

Straight-line wind damage in Northwest Cowley County.

Straight-line wind damage in Northwest Cowley County.

Straight-line wind damage in Northwest Cowley County.

 

 

 

 

 

 

This story was brought to you by the National Weather Service - Wichita, Kansas.



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