Process Unit Upset; Operations Restored to Normal Status

           Process Unit Upset; Operations Restored to Normal Status

PR Newswire

RIDGEFIELD, Conn., Nov. 27, 2012

RIDGEFIELD, Conn., Nov. 27, 2012 /PRNewswire/ --Northern Tier Energy LP
(NYSE: NTI) ("Northern Tier Energy") reported today that a small leak was
detected in one of its process units. Standard emergency protocol was followed
including clearing personnel from the immediate area, and informing local
agencies. All employees have been accounted for and there are no reported
injuries. Crude rates were not impacted. Refinery operations are normal.

About Northern Tier Energy

Northern Tier Energy LP (NYSE:NTI) is an independent downstream energy company
with refining, retail and pipeline operations that serves the PADD II region
of the United States. Northern Tier Energy operates a 84,500 barrels per
stream day refinery located in St. Paul Park, Minnesota. Northern Tier Energy
also operates 166 convenience stores and supports 68 franchised convenience
stores, primarily in Minnesota and Wisconsin, under the SuperAmerica
trademark, and owns a bakery and commissary under the SuperMom's brand.
Northern Tier Energy is headquartered in Ridgefield, Connecticut.

SOURCE Northern Tier Energy LP

Contact: Media Inquiries: Christine Carnicelli,, +1-203-244-6550; Investor Inquiries: Maria
Testani,, +1-203-244-6550
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