Due to cold weather having moved into its market area and based on anticipated demand, Southern projected that storage withdrawal requirements would exceed its capability starting Monday, and thus it implemented an OFO Type 6 for short imbalances that day until further notice. The OFO was extended through at least Tuesday, and Southern said it was "highly likely" that it will remain in place for short imbalances through Friday.

Because of below-zero temperatures expected in its service area, CIG declared a Strained Operating Condition effective Sunday until further notice. Withdrawals from storage were expected to be at maximum, the pipeline said.

Northern Natural Gas did not extend beyond Monday a System Overrun Limitation for Zone EF that had been in effect for three days.

Tennessee issued an Imbalance Warning Monday in Zones 1, L, 2, 4, 5 and 6.

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