SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0215 AM CST Thu Dec 24 2020 Valid 261200Z - 271200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Saturday. ...Synopsis... Modest upper ridging is forecast to be in place over the High Plains early Saturday, with a shortwave trough likely centered west of this ridge over the interior Pacific Northwest. This shortwave trough is expected to continue eastward during the period, reaching the northern/central Plains by early Sunday morning. Cold temperatures aloft will accompany this shortwave, but low levels are expected to be too cold and dry to produce buoyancy. Surface lee troughing will deepen ahead of the shortwave trough, with eventual cyclogenesis over the central High Plains. Resulting surface low will likely then move eastward/northeast across KS, reaching the Mid MO Valley by Sunday morning. Cold front attendant to the surface low will sweep across the central Plains, but the dearth of low-level moisture will result in stable conditions. ..Mosier.. 12/24/2020
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