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North Texas Severe
Weather April 23, 2008
Erath-Palo Pinto and
Tarrant-Johnson Counties
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During the late afternoon hours on Wednesday, April 23, 2008, supercell
thunderstorms spread from west Texas into parts of north Texas. Additional
thunderstorms developed through the evening hours as the complex of
thunderstorms moved east. Reports of tornadoes, very large hail, damaging
straight-line winds, and flash flooding accompanied the thunderstorms.
(Read the Local Storm
Report Summary)
The WSR-88D radar images below show a supercell thunderstorm near the Erath -
Palo Pinto County line at 647 pm CDT. The bright red and pink colors in the
radar reflectivity represent values up to 70 dBZ that were caused by very
large hailstones. Also note the distinct hook echo on the southern part
of the storm straight west of Lipan. The Doppler Velocity image, also taken
at 647 pm CDT, shows a large, well-defined counterclockwise circulation pattern
across extreme northern Erath County. The red colors in the storm-relative
mean radial velocity image indicate winds blowing AWAY from the radar located
at KFWS (Fort Worth Spinks airport); the green colors represent winds
blowing toward the radar (or from west to east). This supercell thunderstorm
prompted the issuance of Tornado Warnings across this area Wednesday
evening. This statement
gives a brief summary of the known tornadoes that occurred in this area. |
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KFWS Reflectivity Image at
6:47 pm CDT - April 23, 2008 |
KFWS Storm Relative
Velocity Image at 6:47 pm CDT - April 23, 2008 |
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These two WSR-88D images were taken at a radar elevation angle of 1.5
degrees at 832 pm CDT on 4/23/08. Intense thunderstorms were moving
across Johnson and southwest Tarrant County. The pattern in the
red colors (50+ dBZ) resembles an arc shape or "bow", indicating that
very strong low level winds were associated with the line of storms
across this area. The mean radial velocity image shows a distinct
transition area where outbound (relative to the KFWS radar site which is between Crowley and Rendon) velocities are located
next to inbound velocities along a radar radial. This transition
zone, which represents a region of intense horizontal wind shear, is
best defined on the velocity image from the southwest tip of Tarrant
County eastward to between Joshua and Burleson. This thunderstorm
moved northeast into Tarrant County and was responsible for producing
a tornado near Crowley. The results of the damage survey are available. |
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KFWS Reflectivity Image at
8:32 pm CDT - April 23, 2008 (1.5 degrees) |
KFWS Storm Relative
Velocity Image at 8:32 pm CDT - April 23, 2008 |
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National Weather Service
Fort Worth Weather Forecast Office
3401 Northern Cross Blvd.
Fort Worth, TX 76137
Page last modified: 04/28/08
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