Southwest Airlines Weather Impacts

Southwest Airlines currently has 5 aircraft with ETA after 3 AM CDT. Southwest normally operates from 5:00 AM-2:00 AM CDT. The current
latest ETA is Flight 895 that left Midway at 12:53 AM CDT and has an ETA
in Los Angeles in 4:46 AM CDT. But the Midway to Portland leg of Flight 2276 could have an ETA as late as 5:15 AM CDT. Which could mean the Southwest will not have 0 aircraft in the air during the upcoming 2:00-5:00 AM CDT period.