SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0123 PM CST Sun Dec 21 2025 Valid 212000Z - 221200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected today. ...20z Update... No changes are needed to the D1 Convective Outlook. See previous discussion below. ..Thornton.. 12/21/2025 .PREV DISCUSSION... /ISSUED 0957 AM CST Sun Dec 21 2025/ Thunderstorm potential will be limited across the CONUS. Strong onshore flow and cold temperatures aloft will pose a risk of a few lightning flashes today and tonight over portions of the WA/OR coast and parts of northern CA. Low-level warm advection and an approaching cold front could result in isolated thunderstorms this afternoon over parts of southern LA/MS, and late tonight over south TX. No severe storms are anticipated today.
