SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0200 PM CST Mon Jan 18 2021 Valid 182000Z - 191200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the U.S. mainland the rest of today or tonight. ...Eastern Texas... Modified continental polar air with 50s to around 60 F dewpoints will advect through eastern TX ahead of a southward-advancing cold front, resulting in a shallow unstable layer above the surface. Scattered elevated showers are likely within the frontal zone as well as the warm sector late tonight. However, it appears the convective layer will not deepen sufficiently to support a 10% or greater coverage of thunderstorms prior to 12Z. ..Dial.. 01/18/2021 .PREV DISCUSSION... /ISSUED 1028 AM CST Mon Jan 18 2021/ ...Central/east Texas... Scattered showers are expected to develop/increase late tonight through the early morning hours of Tuesday near/behind the surface reflection of a southeastward-advancing cold front. Minimal elevated buoyancy through a sufficient depth may allow for charge separation and some lightning flashes in the pre-dawn hours of Tuesday.
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