Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1234 AM CST Mon Dec 26 2016 Valid 271200Z - 281200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms will be possible for Tuesday and Tuesday night from portions of the southern Great Plains to the lower Mississippi and Tennessee Valley region. ...Synopsis/Discussion... A front -- initially extending from New England to south TX -- is forecast to advance eastward/southward, except across TX where the boundary is expected to stall and weaken. This will occur while a lee trough develops over the central and northern High Plains, in response to an extensive midlevel speed maximum advancing east-southeastward over the Northwest and North-Central States. Residual moisture near and south of the boundary will support sufficient buoyancy for isolated-thunderstorm potential from central and south TX to the lower MS and TN Valley region during the day. For Tuesday night, strengthening isentropic ascent well downstream of the midlevel speed maximum could overlap with the northern periphery of Gulf moisture -- from northeast TX and southeast OK eastward toward parts of AR. Isolated thunderstorms could occur across these areas, especially if ascent were to be augmented by the mass response related to a lower-latitude speed maximum emerging over the southern Great Plains from northwest Mexico. ..Cohen.. 12/26/2016Read more
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