Reason for delayed tornado warnings in Iowa

In a follow-up statement Monday, Buchanan said the communications delay resulted from a damaged fiber optic cable at the Weather Service’s Dallas-Fort Worth office.

“The cable outage caused that office to switch from its primary, land-based communication network to a backup satellite-based network that serves every NWS field office,” she wrote. “The uptick in messages flowing to the central message handler from NWS Central Region offices due to the severe weather, combined with the performance characteristics of the satellite network in use at a co-located site, slowed down the queue of message transmissions and created a brief backlog across multiple offices.”