Item 7.01 Regulation FD Disclosure.

On November 20, 2009, Brian Bird, vice president, chief financial officer and treasurer, of NorthWestern Corporation d/b/a NorthWestern Energy (NYSE: NWE) (the "Company"), will be presenting certain information concerning the Company in a slide presentation to current and potential investors at the Sidoti & Co. Investor Forum in New York City.

A copy of the slide presentation is being furnished pursuant to Regulation FD as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information in the slide presentation shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section. Furthermore, the slide presentation shall not be deemed to be incorporated by reference into the Company's filings under the Securities Act of 1933, as amended, or under the Securities Exchange Act of 1934, as amended, except as set forth with respect thereto in any such filing.

Item 9.01 Financial Statements and Exhibits.

EXHIBIT NO. DESCRIPTION OF DOCUMENT
99.1* Slide presentation dated November 20, 2009

* filed herewith

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