WFAA-TV

The storm peeled back the roof of this shed in Palo Pinto County.

Here is a minute-by-minute account of Friday afternoon's severe weather event in North Texas as it happened:

D/FW AIRPORT, 5:24 p.m.: The all-clear has been sounded and passengers are returning to ticket counters on the upper level of American Airlines Terminal C. However, all flights are still grounded, a number of flights are already canceled and other travelers face delays up to four hours. - Bert Lozano, WFAA-TV

DALLAS, 5:17 p.m.: Hurricane-like squall conditions are evident in downtown Dallas, where rainfall has once again started picking up. This isn't exactly Chamber of Commerce weather for Cotton Bowl visitors from Nebraska and Auburn. - Brad Watson, WFAA-TV

FRISCO, 5:15 p.m.: Temperatures dropped within minutes as torrential rain moved through Collin County, but there were no reports of damage. Officials with the North Texas Municipal Water District are hoping that the rain will have a beneficial impact on the Lake Lavon reservoir, at a record low level due to drought conditions. - Steve Stoler, WFAA-TV

D/FW AIRPORT, 5:04 p.m.: The upper level of American Airlines Terminal C is being evacuated as a storm approaches the airport. About 300 passengers are being warned to stay away from windows as they move to a safer area. Public safety officials said a tornado was headed directly to the airport. - Bert Lozano, WFAA-TV

PALO PINTO COUNTY, 5:01 p.m.: About an hour ago, there had been reports of a funnel cloud ripping through this rural area. "Debris started going everywhere," said resident Shelly Hogan. "You could hear it, see it skipping." - Darla Miles, WFAA-TV

LIMESTONE COUNTY, 5 p.m.: "Something pretty severe has come through here ... it destroyed two houses on either side of the freeway, and the houses next door have not been damaged at all. - Robyn Kriel, KWTX-TV

D/FW AIRPORT, 4:54 p.m.: "We're seeing a backlog of travelers as flights continue to be delayed and canceled ... we're also seeing delays of two to four hours as the weather begins to intensify." - Bert Lozano, WFAA-TV

ARLINGTON, 4:51 p.m.: At 4:45 p.m., storm spotter sand National Weather Service meteorologists observed a developing tornado near Arlington, moving north at 40 mph. The tornado will be near Euless by 4:55 p.m. - National Weather Service

DENTON, 4:45 p.m.: "We're starting to see some rain falling there, and the intensity will only pick up." - Pete Delkus, WFAA-TV meteorologist

LIMESTONE COUNTY, 4:40 p.m.: One dead, 12 injured in Groesbeck. - Waco Tribune Herald

ARLINGTON, 4:34 p.m.: No tornadic activity spotted to the southwest of Interstate 20 and Highway 360. There's a moderate rain falling at this location, and the sky is getting darker. - David Schechter, WFAA-TV

DALLAS, 4:33 p.m.: "The potential for another tornado on the ground in southern Tarrant County is very likely." - Pete Delkus, WFAA-TV meteorologist

TARRANT COUNTY, 4:30 p.m.: Sirens are sounding in the southern section of the county as the storm approaches.

PALO PINTO-PARKER COUNTY LINE, 4:27 p.m.: Residents in this rural area say they believe a tornado hit their community. The high winds stripped part of the roof from one home and peeled apart a backyard shed like tin foil. Debris was scattered through the neighborhood north of Mineral Wlels, and some residents told News 8 they were sucked back inside their home as when they tried to open a door. - Darla Miles, WFAA-TV

DALLAS/FORT WORTH INTERNATIONAL AIRPORT, 4:25 p.m.: Channel 8's airport towercam is knocked out by a lightning strike

WFAA-TV, DallasNews.com and the Associated Press contributed to this report.