ACUS11 KWNS 061728 SWOMCD SPC MCD 061728 OKZ000-TXZ000-061900- Mesoscale Discussion 1000 NWS Storm Prediction Center Norman OK 1228 PM CDT Sat Jun 06 2026 Areas affected...portions of central and northwest Texas into south-central Oklahoma Concerning...Severe potential...Watch unlikely Valid 061728Z - 061900Z Probability of Watch Issuance...20 percent SUMMARY...Scattered thunderstorms will pose a risk for isolated damaging downburst winds and large hail through this evening. A brief landspout may also be possible. DISCUSSION...A cluster of ongoing thunderstorms west/northwest of Abilene has recently exhibited an uptick in lightning activity, with MRMS and other MESH estimates ranging from 0.5-1" with a marginal supercell located along the leading edge of this cluster as of 1700 UTC. Additional thunderstorm development is expected through the afternoon across portions of central/northwest Texas into southern Oklahoma. Continued diurnal heating of this moist low-level air mass (as sampled by the 12z FWD/OUN observed soundings) is expected to support continued destabilization throughout the afternoon, with 1500-2000 J/kg MLCAPE expected by peak heating. While deep-layer flow remains modest at best, marginally stronger southerly/southwesterly flow downstream of a mid-level closed low/MCV located over the Texas Panhandle is contributing to around 25-30 (locally up to 35) kts of effective bulk shear, sufficient for marginal updraft organization. PWAT values in excess of 1.5-1.6" (up to 1.9" sampled by the 12 FWD sounding) and a modest steepening of low-level lapse rates (owing to diurnal heating) will promote the potential for water loaded downbursts, especially with any more organized clusters that can develop. Marginal supercells will also be possible. While generally weak mid-level lapse rates should largely temper the overall hail threat, isolated large hail may accompany the most robust updrafts. Finally, a brief landspout cannot be ruled out should a stronger low-level updraft interact with enhanced surface vertical vorticity along a surface/outflow boundary. Given the expectation for storm organization and severe risk to remain limited in magnitude, watch issuance is unlikely. ..Chalmers/Thompson.. 06/06/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FWD...OUN...SJT...LUB...MAF... LAT...LON 31890113 32570108 33160086 33730052 34140007 34369957 34579890 34709786 34559724 34279684 33889660 33469649 33079651 32419689 31979749 30969895 30659929 30559962 30579997 30760042 31130087 31890113 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN