SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1121 PM CST Thu Dec 17 2020 Valid 181200Z - 191200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorm development will be possible late tonight from parts of the Texas Hill Country northeastward to the Arklatex. No severe thunderstorms are expected. ...DISCUSSION... An upper-level ridge will move into the Ohio and Tennessee Valleys today as an upper-level trough moves across the Desert Southwest. Ahead of the western U.S. trough, weak moisture return will take place across the southern Plains. A low-level jet is forecast to strengthen across the eastern third of Texas tonight. In response, lift may be sufficient for isolated thunderstorm development from the Texas Hill Country northeastward to the Arklatex. However, instability will be insufficient for a severe threat. Elsewhere across the continental United States, thunderstorm development is not expected today or tonight. ..Broyles.. 12/18/2020
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