National Weather Service United States Department of Commerce

Enhanced Risk for Severe Thunderstorms Across the Upper Midwest; Flash Flooding Possible from the Upper Midwest to Southern Plains and Desert Southwest Through Friday

Portions of the Upper Midwest will see an increased threat for severe thunderstorms through this evening, with a few strong tornadoes possible. The same region remains on alert for additional flash flood concerns. Heavy rainfall may lead to flash flooding across the Desert Southwest today, and Southern Plains by Friday. Finally, Major-to-record river flooding continues across the Carolinas. Read More >

A severe weather event occurred across various parts of west-central Texas on May 19.  An upper level storm system gradually approached from the southern Rockies, and a cold front approached from the north late in the evening. With very unstable air and adequate vertical shear, strong to severe storms occurred at various times during the day and into the nighttime hours.  Much of the severe weather was concentrated across the Concho Valley and Heartland areas during the afternoon through late evening hours.   

Widely scattered severe storms across the Big Country area produced large hail, during the morning.  The largest reported hail was golfball size at Sweetwater (Nolan County).  During the afternoon, thunderstorms initially developed across the Concho Valley and moved mostly to the east.  Most of the large hail reports ranged from quarter to golfball in size.  Baseball size hail occurred 1 mile northwest of Paint Rock (Concho County), and hail up to softball size was reported 3 miles south-southwest of Santa Anna (Coleman County).  Brief tornado touchdowns were reported 4 miles west of Trickham (Coleman County) and 4 miles southwest of Bangs (Brown County).  A total of  34 severe weather reports were received on May 19.

Figure 1 shows an animated loop of radar imagery, with the severe thunderstorms which affected the aforementioned areas.

Figure 1: Animated Loop of Radar Imagery on May 19 (between 330 PM and 730 PM).