Sioux Falls - Prices for natural gas and electricity are spiking and commercial and other customers should consider limiting their energy use for the next 48 hours when possible.

The entire region is experiencing extreme low temperatures, creating record demand and constraining energy reserves. Prices are escalating as energy demand exceeds supply.

'Prices are near historical highs in some cases,' said NorthWestern Energy Director of Long-Term Resources Bleau Lafave. 'It is important for customers to be aware of these prices as they make decisions about their operations.'

The escalated prices will likely impact customers in the future with higher natural gas commodity and electric fuel purchase bills.

About NorthWestern Energy (Nasdaq: NWE)

NorthWestern Corporation, doing business as NorthWestern Energy, provides electricity and / or natural gas to approximately 734,800 customers in Montana, South Dakota and Nebraska. We have generated and distributed electricity in South Dakota and distributed natural gas in South Dakota and Nebraska since 1923 and have generated and distributed electricity and distributed natural gas in Montana since 2002.

Contact:

Jo Dee Black

Tel: (866) 622-8081

Email: jodee.black@northwestern.com

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