412 ACUS11 KWNS 160101 SWOMCD SPC MCD 160101 OKZ000-TXZ000-160230- Mesoscale Discussion 0458 NWS Storm Prediction Center Norman OK 0801 PM CDT Wed Apr 15 2026 Areas affected...North and central Texas Concerning...Severe Thunderstorm Watch 123... Valid 160101Z - 160230Z The severe weather threat for Severe Thunderstorm Watch 123 continues. SUMMARY...A gradual decrease in storm coverage and intensity is expected by 02-03z. DISCUSSION...The earlier dryline storms have moved well east into the moist sector across north TX, and will still pose a large hail/wind damage threat through about 02z. Farther southwest, isolated storm development persists into the Edwards Plateau with an isolated hail threat. In the broader sense, storm coverage and intensity are expected to decrease with the loss of surface heating in a weakly forced environment, and the severe threat is likewise expected to decrease after 02z. ..Thompson.. 04/16/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FWD...OUN...SJT... LAT...LON 31779884 31190056 31370075 32449881 33869725 33869725 33859638 33509638 31779884 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN  654 ACUS11 KWNS 160135 SWOMCD SPC MCD 160134 MOZ000-ARZ000-OKZ000-KSZ000-160300- Mesoscale Discussion 0459 NWS Storm Prediction Center Norman OK 0834 PM CDT Wed Apr 15 2026 Areas affected...Eastern Oklahoma to southern Missouri Concerning...Tornado Watch 121...124... Valid 160134Z - 160300Z The severe weather threat for Tornado Watch 121, 124 continues. SUMMARY...Two corridors of severe threat are expected to persist until 03-05z from the Kansas/Oklahoma border into southern Missouri, and from southeast Oklahoma into west central/northwest Arkansas. WW 121 will be extended until 05z. DISCUSSION...Convection has evolved into two primary corridors along composite outflow boundaries: 1) from the KS/OK border eastward into MO, and 2) from southeast OK toward west central AR. The northern corridor still has sufficient buoyancy to maintain a wind/hail and isolated tornado threat, based on the 00z SGF sounding. The bowing segment in south central MO will approach areas west of Saint Louis, but it is unclear if the storms will maintain intensity past the MS River. The southern corridor of storms will likewise persist for another couple of hours in an environment with moderate buoyancy and sufficient deep-layer vertical shear to maintain a severe threat. The large mass of convection and an expansive cold pool suggest that the storms will persist, but buoyancy decreases gradually with eastward extent. A local extension in time of WW 121 until 05z would likely cover the remaining threat across southeast OK and southwest MO. ..Thompson.. 04/16/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LSX...LZK...SGF...SHV...TSA...ICT...OUN... LAT...LON 34749409 34419470 34059567 33969600 34099644 34479632 35029540 35689453 36139402 36669417 36819467 36819579 37159590 37909388 38769108 38339074 37189243 35319347 34749409 MOST PROBABLE PEAK TORNADO INTENSITY...85-115 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN