Large hail in Texas
GOES-16 “Red” Visible (0.64 µm) images (top) and “Clean” Infrared Window (10.35 µm) images (bottom), with plots of SPC Storm Reports [click to play animation | MP4]
The NWS and @disastersafety surveyed a giant hailstone that fell in Hondo, TX on April 28th, measuring 6.4″ in diameter! The measurement will be presented to a State Climate Extreme Committee, who will be tasked to verify and determine what, if any, records were broken. pic.twitter.com/MPujiIXJBv
— NWS Austin/San Antonio (@NWSSanAntonio) May 7, 2021
Vigorous overshooting tops were seen in both the Visible and Infrared GOES-16 images, with the coldest IR brightness temperatures in the -80 to -89ºC range (shades of violet to purple) — and along the southern flank of the storms, inflow feeder bands were evident the Visible imagery. 00 UTC rawinsonde data from Del Rio, Texas (below) showed that parcel temperatures of -80 to -89ºC would indicate significant vertical overshoots of both the equilibrium level (-67ºC) and the tropopause (-74.7ºC). Farther to the north, 1-minute GOES-16 Infrared images (below) showed other thunderstorms that produced large hail (up to 3.25 inches in diameter) in the Dallas/Fort Worth area after sunset.
GOES-16 “Clean” Infrared Window (10.35 µm) images, with SPC Storm Reports plotted in cyan [click to play animation | MP4]