My first piece of advice is most of us pull our awnings in when a storm is coming. An awning wrapped around your roof is not a pretty site.
As for repair, some awning mechanisms have a pin that holds the spring in place. Possibly that pin broke or fell out. Most probably a broken spring, but the other is a maybe.
2003 Dodge HO 6 speed Laramie Dually, Jordan controller, RDS fuel tank, Air Ride 25K hitch
Carriage 36' fiver, Onan 6500, Prosine 2K inverter, 3 slides, MORyde IS and Kingpin