Administrators NorthGeorgiaWX Posted December 20, 2023 Administrators Share Posted December 20, 2023 SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0631 AM CST Wed Dec 20 2023 Valid 201300Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible across parts of southern/central California and over portions of the Southwest. The severe-thunderstorm threat appears low. ...CA to AZ/NM though tonight... A midlevel low is expected to move slowly southward off the central/southern CA coast through early Thursday, while a weak/lead shortwave trough ejects northeastward over AZ/NM. Some midlevel convection occurred overnight across southern AZ in association with the lead wave, where sufficient midlevel lapse rates/moisture contributed to MUCAPE of 100-200 J/kg (rooted near 700 mb). Isolated thunderstorms will be possible through the day from southeast AZ shifting eastward into NM. Otherwise, the primary baroclinic band will overspread the central CA coast today and eventually reach the southern CA coast by tonight. Isolated thunderstorms will be possible near the coast through the period, and across the San Joaquin Valley this afternoon. Forecast wind profiles suggest low potential for embedded organized/weakly rotating storms just offshore, as observed south of San Francisco this morning. However, inland buoyancy should remain too marginal to introduce any damaging wind and/or tornado probabilities. ..Thompson/Broyles.. 12/20/2023 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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