Posted: Feb 6, 2014 9:13 PM
Updated: Feb 6, 2014 9:14 PM
DALLAS (AP) The state's biggest electric grid operator is warning of possible rotating blackouts in the Rio Grande Valley of South Texas.
The Electric Reliability Council of Texas also asks the entire state to reduce electric demand through noon Friday.
ERCOT blames extreme cold and natural gas shortages limiting some generation capacity. An ERCOT statement also said the Valley is further affected by a planned outage on a transmission line that's being upgraded.
The National Weather Service has issued a winter weather advisory for Central Texas for Friday with sleet and freezing rain and drizzle in the forecast.