Administrators NorthGeorgiaWX Posted December 20, 2023 Administrators Share Posted December 20, 2023 SPC 0700Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1246 AM CST Wed Dec 20 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 southern Arizona, on Thursday. ...Synopsis... A low-amplitude shortwave trough is expected to begin the period over the southern High Plains before continuing eastward throughout the day across the southern Plains. A modest moist air mass will be in place ahead of this shortwave across TX and OK, with mid 50s dewpoints likely reaching into far northwest TX. Even with this increased low-level moisture, warm mid-level temperatures and resulting poor mid-level lapse rates should temper buoyancy. A few lightning flashes may occur, but the limited buoyancy should keep the majority of updrafts too weak and shallow to produce lightning. Farther west, an upper low is forecast to be centered about 320 miles off the southern CA coast early Thursday morning. This low is expected to drift gradually southward throughout the first part of the day before then tracking more eastward towards the coast overnight and into Friday morning. Persistent forcing for ascent, ample mid-level moisture, and cold mid-level temperatures associated with this low will help support isolated thunderstorm development along the coast throughout the day. As the low moves gradually eastward, showers and thunderstorms are expected to expand eastward across southern Arizona early Friday morning. ..Mosier.. 12/20/2023 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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