new youtube channel - we've just launched a new experimental youtube channel over at tornado HQ, including severe weather outlook videos.
Severe thunderstorms are not expected today.
SPC AC 210600
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0100 AM CDT Tue Mar 21 2023
Valid 211200Z - 221200Z
NO SEVERE THUNDERSTORM AREAS FORECAST
### SUMMARY
Severe thunderstorms are not expected today.
Discussion
While quasi-zonal flow aloft prevails across the central and eastern U.S. today, an eastern-Pacific upper low is forecast to progress eastward, and eventually inland trough the second half of the period. The low will reach a position over the Nevada vicinity by 22/12, while broader cyclonic flow expands to encompass much of the Intermountain West.
As this upper cyclone – and associated surface low/frontal system – move inland, cooling aloft will assist with weak destabilization, and development of showers and embedded thunderstorms across much of California and the Great Basin.
Downstream, weak perturbations will continue moving through the westerly flow field aloft. The westerlies will maintain general lee troughing over the High Plains, supporting a diurnal, southerly low-level jet cycle over the southern/central Plains. As a result, potential for elevated showers and thunderstorms – diminishing somewhat through the day and then increasing again during the evening/overnight – is expected, centered over the eastern Kansas/Missouri vicinity.
Severe weather is not anticipated across either of the two thunder areas.
..Goss/Lyons.. 03/21/2023
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