first alert weather September 20, 2024 8:39 pm NBC6 First Alert forecast – Sept. 20, 2024 evening Meteorologist Steve MacLaughlin has the latest forecast Friday, Sept. 20, 2024. US & World Videos 1:14 Saturday evening forecast – September 21, 2024 2:53 NBC6 First Alert Forecast – Sept. 20, 2024 – Morning 1:25 NBC6 First Alert forecast – Sept. 19, 2024 evening 3:05 NBC6 First Alert Forecast – Sept. 19, 2024 – Morning 0:52 NBC6 First Alert forecast – Sept. 18, 2024 evening