Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0754 PM CDT Mon Mar 17 2025 Valid 180100Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast tonight. ...01z Update... Upper trough is advancing inland along the Pacific Coast early this evening. Isolated thunderstorms have developed beneath this trough as cold mid-level temperatures have steepened lapse rates. 00z sounding from OAK exhibited a few hundred J/kg SBCAPE, and this seems to be representative across the interior valleys. Over the next few hours nocturnal cooling should result in weaker updrafts and less lightning. Overall trends should be down after 03z. ..Darrow.. 03/18/2025
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