45th Weather Squadron's L-0 Launch Mission Execution Forecast for ULA's Atlas V 551 with #AEHF4 from SLC-41 holds steady at 80% of accepted conditions. 2hr launch window opens tonight 12:15am EDT. Conditions have slightly improved for a 24hr scrub turnaround with at 70%. pic.twitter.com/bar8w56rHJ

— Nathan Barker (@NASA_Nerd) October 16, 2018