![]() | MESOSCALE DISCUSSION 0801 NWS Storm Prediction Center Norman OK 1123 AM CDT Wed May 20 2026 AREAS AFFECTED...portions of the Mid-Atlantic CONCERNING...Severe potential...Severe Thunderstorm Watch likely VALID 201623Z - 201800Z PROBABILITY OF WATCH ISSUANCE...80 percent SUMMARY...Widely scattered thunderstorms will pose a risk for DAMAGING WIND GUSTS and isolated large hail this afternoon and evening. A Severe Thunderstorm Watch will be needed soon. DISCUSSION...Latest surface observations depict a cold front extending from central New York southwestward through north-central and western Pennsylvania into southeast Ohio. Ahead of this cold front, temperatures ....... more |