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Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
764 ACUS02 KWNS 201731 SWODY2 SPC AC 201730 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1230 PM CDT Sat Jul 20 2024 Valid 211200Z - 221200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe-thunderstorm potential is expected to be low on Sunday. ...Discussion... Little change is expected in the upper flow field configuration over the U.S. Sunday, with ridging to remain over the West, and weak troughing/cyclonic flow over most of the central and eastern portions of the country. At the surface, a weak baroclinic zone is forecast to extend from the southern New England vicinity west-southwestward across the Tennessee Valley area and into the southern Plains. Showers and thunderstorms -- with coverage peaking through the afternoon and evening hours -- are expected across a large portion of the country. However, with modest flow aloft prevailing, potential for well-organized storms remains low. One area where risk for a strong wind gust or two may be slightly greater, will be across roughly the southern half of Arizona. Storms developing over the Mogollon Rim during the afternoon should move southward off the higher terrain. With the typical dry/deep mixed layer expected over the lower deserts, evaporative effects may support some downdraft enhancement with the strongest storms. However, at this time it appears that mid-level northerlies are a bit weak to support a more organized, southward-propagating convective event. ..Goss.. 07/20/2024 $$