Butte, Mont. - May 12, 2021- Northwestern Energy customers in the Silesia, Rockvale and Joliet areas will have a planned power outage from midnight to 5 a.m. Thursday, May 20.

The outage will allow crews to safely work on an upgrade of the Rockvale substation, which will improve reliability for the 1,920 customers it serves. NorthWestern Energy appreciates our customers' patience.

Call 1-888-467-2669 for more information.
Follow us on Facebook or on Twitter (@NWEinfo).

About NorthWestern Energy (Nasdaq: NWE)

NorthWestern provides electricity and / or natural gas to approximately 743,000 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. More information on NorthWestern is available on the company's website at www.northwesternenergy.com.

Media Contacts:
 Jo Dee Black
866-622-8081
jodee.black@northwestern.com

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NorthWestern Corporation published this content on 12 May 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 13 May 2021 10:01:01 UTC.