SPC MD 489

MD 0489 CONCERNING SEVERE THUNDERSTORM WATCH 132... FOR SOUTHWESTERN THROUGH NORTHEASTERN OKLAHOMA...SOUTHWESTERN INTO SOUTH CENTRAL MISSOURI...ADJACENT PORTIONS OF TEXAS AND ARKANSAS Mesoscale Discussion 0489 NWS Storm Prediction Center Norman OK 1109 PM CDT Fri Apr 17 2026 Areas affected...southwestern through northeastern Oklahoma...southwestern into south central Missouri...adjacent portions of Texas and Arkansas Concerning...Severe Thunderstorm Watch 132... Valid 180409Z - 180615Z The severe weather threat for Severe Thunderstorm Watch 132 continues. SUMMARY...Thunderstorm intensities are waning with diminishing risk for severe weather. A new severe weather watch is not anticipated. DISCUSSION...The southward cold frontal surge continues, particularly across and south of the Interstate 44 corridor of Oklahoma, accompanied by 3-5+ mb 2-hourly surface pressure rises and gusty northwesterly winds. Lift of moist, potentially unstable air above the leading edge of this air mass is maintaining fairly vigorous thunderstorm development, which may be locally augmenting these gusts. Most unstable inflow near the cold front/dryline intersection southwest of Altus OK might still be sufficient to support at least some continuing risk for severe hail across the nearby Red River vicinity another couple of hours. Otherwise, peak convective intensities have been gradually waning over the past few hours with diminishing severe weather potential. ..Kerr.. 04/18/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LZK...SGF...TSA...FWD...OUN...SJT... LAT...LON 34709987 35499856 36369681 37079437 37749295 36839265 34719498 33599729 32759933 34709987 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN Read more