first alert weather December 21, 2024 11:20 am NBC6 First Alert forecast – Dec. 21, 2024 morning Meteorologist Chelsea Ambriz has the latest forecast Saturday, Dec. 21, 2024. US & World Videos 2:44 NBC6 First Alert forecast – morning – Dec. 22, 2024 1:28 NBC6 First Alert forecast – Dec. 21, 2024 evening 1:17 NBC6 First Alert forecast – Dec. 20, 2024 evening 2:56 NBC6 First Alert Forecast – Dec. 20, 2024 – Morning 3:25 NBC6 First Alert Forecast – Dec. 19, 2024 – Morning