Administrators NorthGeorgiaWX Posted December 19, 2023 Administrators Share Posted December 19, 2023 SPC 0830Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0225 AM CST Tue Dec 19 2023 Valid 211200Z - 221200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are expected across coastal portions of central and southern California, as well as the Arizona Lower Desert, on Thursday. ...Synopsis... A low-amplitude shortwave trough is forecast to progress steadily eastward from the southern High Plains through the southern Plains on Thursday. Modest low-level moisture will be in place ahead of this wave, with surface dewpoints likely in the mid to upper 50s across much of TX by Thursday afternoon. Even with this increased low-level moisture, warm mid-level temperatures and resulting poor lapse rates should significantly limit buoyancy. This limited buoyancy will keep updrafts weak and too shallow to produce lightning. Farther west, an upper low is expected to begin the period centered off the southern CA coast. This low is then expected to track southeastward throughout the day, ending the period centered about 200 miles west-southwest of SAN. Strong forcing for ascent and cold mid-level temperatures will help support isolated thunderstorms, with the highest storm coverage anticipated over the immediate coastal areas. As the low moves gradually eastward, showers and thunderstorms are expected to expand eastward into the AZ Lower Desert early Friday morning. ..Mosier.. 12/19/2023 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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