Administrators NorthGeorgiaWX Posted December 18, 2023 Administrators Share Posted December 18, 2023 SPC 0700Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1252 AM CST Mon Dec 18 2023 Valid 191200Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected on Tuesday. ...Synopsis... Upper low initially centered over the PA/western NY vicinity is forecast to progress eastward throughout the day, moving off the northern Mid-Atlantic coast by Tuesday evening. This upper low will be characterized by cold mid-level temperatures and strong mid-level flow, particularly throughout its eastern periphery. Even so, low-level moisture will have been scoured well offshore by a previous frontal intrusion, and the dry continental air mass expected to be in place will be hostile to deep convection. Farther west, an upper low is expected to drift southward off the West Coast, ending the period centered off the central CA Coast. Persistent southwesterly flow aloft is anticipated across central CA ahead of this upper low, contributing to showers throughout the day. A few deeper updrafts capable of lightning flashes are possible within these showers. A higher probability lightning potential is expected early Wednesday morning as the primary frontal band associated with the upper low approaches the central CA Coast. A low-amplitude shortwave trough is forecast to move through the westerly flow aloft south of the upper low across southern CA. However, thermodynamic conditions in the vicinity of this shortwave are not conducive to lightning production. ..Mosier.. 12/18/2023 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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