Administrators NorthGeorgiaWX Posted December 19, 2023 Administrators Share Posted December 19, 2023 SPC 0700Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1253 AM CST Tue Dec 19 2023 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated lightning flashes are possible along the central and southern California coast and over portions of the Southwest on Wednesday. ...Synopsis... A dry continental air mass is expected to persist across the eastern CONUS on Wednesday, dominating the sensible weather over the region. Some modest air mass modification is anticipated across the southern Plains as a series of low-amplitude shortwave troughs move through the southwestern flow extending from the Southwest into the Plains. Some precipitation is possible in vicinity of these waves over the southern Plains, but thermodynamic conditions are not expected to support lightning production. Deeper convection is possible Wednesday afternoon farther west across portions of AZ and NM, and mid-level temperatures may be cool enough for modest buoyancy. Consequently, some isolated lightning flashes are possible as a shortwave trough moves through. Even farther west, an upper low is forecast to begin the period centered about 285 miles west-southwest of SFO, before then progressing southward/south-southwestward throughout the period. Expectation is for this low to end the period off the southern CA coast, about 250 miles west-southwest of VBG. Persistent southwesterly flow aloft will help keep profiles moist over much of the central and southern CA coast. Mid-level temperatures across this region are expected to cool throughout the day as the upper low move southward. Modest buoyancy associated with these cooling profiles could support isolated lightning flashes within any deeper, more sustained updrafts. ..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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