ZCZC SPCSWOMCD ALL
ACUS11 KWNS 182337 
SPC MCD 182337 
TXZ000-190100-

Mesoscale Discussion 0489
NWS Storm Prediction Center Norman OK
0637 PM CDT Thu Apr 18 2024

Areas affected...Portions of central Texas

Concerning...Severe Thunderstorm Watch 128...

Valid 182337Z - 190100Z

The severe weather threat for Severe Thunderstorm Watch 128
continues.

SUMMARY...The risk of isolated large hail and severe gusts continues
across portions of Severe Thunderstorm Watch 128.

DISCUSSION...After several cell mergers and earlier hail reports (up
to 2.25 inches in diameter) over parts of central TX, a locally
upscale-grown cluster with two embedded supercells has developed.
This evolution has been aided by a mostly straight
hodograph/crosswise vorticity and very steep deep-layer lapse
rates/strong outflow generation. Strong/deep buoyancy (2500-3000
J/kg MLCAPE) ahead of the embedded supercells and aforementioned
hodograph shape will continue to support large hail to near 2 inches
in diameter. Additionally, the upscale growth could also favor an
increasing severe-wind risk (around 60-70 mph) as the cluster tracks
slowly south-southeastward this evening.

..Weinman.. 04/18/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...FWD...EWX...SJT...

LAT...LON   31239874 31589826 31639773 31449734 31159721 30629760
            30179829 30229874 30609911 30979907 31239874 

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