ZCZC SPCSWOMCD ALL ACUS11 KWNS 170609 SPC MCD 170609 TXZ000-OKZ000-170745- Mesoscale Discussion 0647 NWS Storm Prediction Center Norman OK 0109 AM CDT Mon May 17 2021 Areas affected...portions of north Texas and southwest OK Concerning...Severe Thunderstorm Watch 180... Valid 170609Z - 170745Z The severe weather threat for Severe Thunderstorm Watch 180 continues. SUMMARY...A couple of strong storms may persist another 1-2 hours, with near 1-inch hail and locally strong gusts possible. Gradual weakening in thunderstorm intensity is expected with eastward progression and downstream watches are not expected. DISCUSSION...Clusters of storms are ongoing across portions of the Texas South Plains eastward into north Texas and southwest OK. A severe-warned forward-propagating line of storms near the Red River has weakened considerably over the past 30 minutes as outflow has surged ahead of the line and convection moves into a weaker midlevel lapse rate environment. Furthermore, a southerly low level jet further west over western TX is weaker across western/central OK and north Texas. Overall this should result in a continued decrease in thunderstorm intensity both with the cluster of storms near the Red River to the Dyess AFB vicinity and a couple of weakening supercells just northwest of Fort Worth. A couple of stronger cells east of Lubbock will continue to pose a threat for near 1-inch hail and perhaps a strong gust over the next hour or so. This activity is occurring near the stronger low level jet and in a steeper midlevel lapse rate environment. However, this activity is also expected to gradually weaken through storm interactions and as convection progresses eastward into a less favorable downstream environment. ..Leitman.. 05/17/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FWD...OUN...SJT...LUB...MAF... LAT...LON 33350128 33730141 34030131 34000089 33899999 33919968 34289916 34779886 34969866 34839821 34419766 33889740 33239722 32829729 32549758 32439869 32430034 32740078 33350128 NNNN