[GRAPHIC OMITTED]                                     NorthWestern Corporation
                                                      d/b/a NorthWestern Energy
                                                      125 S. Dakota Ave.
                                                      Sioux Falls, SD 57104
                                                      www.northwesternenergy.com


News Release                                                        NASDAQ: NWEC
FOR IMMEDIATE RELEASE

Media/Investor Relations Contact:
Roger Schrum
605-978-2848
roger.schrum@northwestern.com


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               NORTHWESTERN FILES FORM S-3 TO REGISTER FOR RESALE
             OF ITS COMMON STOCK AND COMMON STOCK PURCHASE WARRANTS

                       BOARD SETS NEW ANNUAL MEETING DATE

SIOUX FALLS, S.D. - March 20, 2005 - NorthWestern Corporation d/b/a NorthWestern
Energy (NASDAQ: NWEC) today reported that it filed a Form S-3 Registration
Statement with the Securities and Exchange Commission registering for resale
shares of its common stock and common stock purchase warrants owned by certain
security holders who may be interested in selling their securities. Pursuant to
the Company's effective plan of reorganization, NorthWestern may register its
securities for resale as requested by certain security holders.

In a prospectus filed with the registration statement, provisions are being made
to allow for:

    o   the resale of 12,827,172 shares of NorthWestern common stock owned by
        certain selling stockholders beneficially and of record, including the
        resale of shares of NorthWestern common stock issuable upon exercise of
        warrants outstanding and owned beneficially and of record by the selling
        stockholders;

    o   the resale of 1,550,622 NorthWestern common stock purchase warrants
        outstanding and owned beneficially and of record by certain selling
        stockholders;

    o   the issuance of shares of NorthWestern common stock upon exercise of the
        warrants;

    o   up to an aggregate of 3,900,000 additional shares of NorthWestern common
        stock that may be issued in the future to selling stockholders pursuant
        to the Company's plan of reorganization.

NorthWestern will not receive any of the proceeds from the resale of the common
stock or the resale of the warrants. NorthWestern will, however, receive
proceeds from the exercise of any warrants.



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NorthWestern Files Form S-3 Registration Statement
March 20, 2005
Page 2


This news release and the prospectus filed with the SEC is not an offer to sell
these securities nor is this news release or such prospectus soliciting an offer
to buy these securities in any jurisdiction where the offer or sale is not
permitted.

New Annual Meeting Date

The Board of Directors has established July 14, 2005, as the new date for the
annual meeting of shareholders. The meeting was previously scheduled for May 19,
2005.

About NorthWestern Energy

NorthWestern Energy is one of the largest providers of electricity and natural
gas in the Upper Midwest and Northwest, serving more than 617,000 customers in
Montana, South Dakota and Nebraska. More information on NorthWestern Energy is
available on the Company's Web site at www.northwesternenergy.com.

                SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

On one or more occasions, we may make statements in this news release regarding
our assumptions, projections, expectations, targets, intentions or beliefs about
future events. All statements other than statements of historical facts,
included or incorporated by reference herein relating to management's current
expectations of future financial performance, continued growth, changes in
economic conditions or capital markets and changes in customer usage patterns
and preferences are forward-looking statements within the meaning of Section 27A
of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of
1934.

Words or phrases such as "anticipates," "may," "will," "should," "believes,"
"estimates," "expects," "intends," "plans," "predicts," "projects," "targets,"
"will likely result," "will continue" or similar expressions identify
forward-looking statements. Forward-looking statements involve risks and
uncertainties which could cause actual results or outcomes to differ materially
from those expressed. We caution that while we make such statements in good
faith and we believe such statements are based on reasonable assumptions,
including without limitation, management's examination of historical operating
trends, data contained in records and other data available from third parties,
we cannot assure you that our projections will be achieved. Factors that may
cause such differences include but are not limited to:


Factors Relating to Our Bankruptcy

    o   our ability to obtain and maintain normal terms with vendors and service
        providers;

    o   the potential adverse impact of the Chapter 11 case on our liquidity or
        results of operations, including our ability to mitigate liquidated
        claims with respect to the Class 9 reserve such that the allowed claims
        do not exceed the reserve;

    o   our ability to fund and execute our business plan;


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NorthWestern Files Form S-3 Registration Statement
March 20, 2005
Page 3


    o   the potential adverse impact of the Netexit Chapter 11 case on our
        liquidity;

    o   our ability to avoid or mitigate an adverse ruling as to Magten Asset
        Management Corporation's appeal of the order confirming our plan of
        reorganization and its appeal of the order approving the memorandum of
        understanding to settle our securities class action litigation;

    o   our ability to avoid or mitigate an adverse judgment against us in that
        certain lawsuit seeking to recover assets or damages on behalf of Clark
        Fork and Blackfoot, LLC, one of our subsidiaries which we refer to as
        CFB, filed by Magten Asset Management Corporation and Law Debenture
        Trust Company of New York, which we refer to as the QUIPs Litigation;

    o   our ability to avoid or mitigate an adverse judgment against us in that
        pending litigation styled as McGreevey et al v. The Montana Power
        Company, the shareholder class action lawsuit relating to the
        disposition of the generating and energy related assets by the entity
        formerly known as The Montana Power Company, excluding our acquisition
        of the electric and natural gas transmission and distribution business
        formerly held by The Montana Power Company entity, together with ERISA
        litigation regarding The Montana Power Company Employee Stock Ownership
        Plan and 401(k) plan, which has been settled pending approval by the
        Bankruptcy Court and the U.S. District Court in Montana where the
        litigation is pending;

    o   our ability to avoid or mitigate an adverse judgment against us in the
        In Re NorthWestern Securities Litigation and Derivative Litigation
        relating to the restatement of our 2002 quarterly financial statements
        and other accounting and financial reporting matters, which has been
        settled pending approval by the U.S. District Court in South Dakota
        where the litigation is pending;

    o   our ability to avoid or mitigate an adverse judgment against us in
        existing other shareholder and derivative litigation or any additional
        litigation and regulatory action, including the formal investigation
        initiated by the SEC, in connection with the restatement of our 2002
        quarterly financial statements and other accounting and financial
        reporting matters, any of which could have a material adverse effect on
        our liquidity, results of operations and financial condition;

General Factors

    o   unscheduled generation outages, maintenance or repairs which may reduce
        revenues and increase cost of sales or may require additional capital
        expenditures or other increased operating costs;

    o   unanticipated changes in usage, commodity prices, fuel supply costs or
        availability due to higher demand, shortages, weather conditions,
        transportation problems or other developments, in combination with
        reduced availability of trade credit, may reduce revenues or may
        increase operating costs, each of which would adversely affect our
        liquidity;

    o   adverse changes in general economic and competitive conditions in our
        service territories;

    o   potential additional adverse federal, state, or local legislation or
        regulation or adverse determinations by regulators, including the final
        order of the Montana Public Service


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NorthWestern Files Form S-3 Registration Statement
March 20, 2005
Page 4


        Commission, which we refer to as the MPSC, disallowing the recovery of
        $10.8 million of natural gas costs we incurred during the 2002-2004
        tracker years, which has had and could continue to have a material
        adverse affect on our liquidity, results of operations and financial
        condition;

    o   increases in interest rates, which will increase our cost of borrowing;

    o   certain other business uncertainties related to the occurrence or threat
        of natural disasters, war, hostilities and terrorist actions;

    o   our ability to attract, motivate and/or retain key employees; and

    o   our ability to improve and maintain an effective internal control
        structure.


We have attempted to identify, in context, certain of the factors that we
believe may cause actual future experience and results to differ materially from
our current expectation regarding the relevant matter or subject area. In
addition to the items specifically discussed above, our business and results of
operations are subject to the uncertainties described under the caption "Risk
Factors" which is a part of the disclosure included in Item 7 of our Form 10-K
entitled "Management's Discussion and Analysis of Financial Condition and
Results of Operations."

From time to time, oral or written forward-looking statements are also included
in our news releases, reports on Forms 10-K, 10-Q and 8-K, Proxy Statements on
Schedule 14A, and other materials released to the public. Although we believe
that at the time made, the expectations reflected in all of these
forward-looking statements are and will be reasonable, any or all of the
forward-looking statements in this news release, our reports on Forms 10-K, 10-Q
and 8-K, our Proxy Statements on Schedule 14A and any other public statements
that are made by us may prove to be incorrect. This may occur as a result of
inaccurate assumptions or as a consequence of changes in known or unknown risks
and uncertainties. Many factors discussed in this news release, certain of which
are beyond our control, will be important in determining our future performance.
Consequently, actual results may differ materially from those that might be
anticipated from forward-looking statements. In light of these and other
uncertainties, you should not regard the inclusion of a forward-looking
statement in this news release or other public communications that we might make
as a representation by us that our plans and objectives will be achieved, and
you should not place undue reliance on such forward-looking statements.

We undertake no obligation to publicly update or revise any forward-looking
statements, whether as a result of new information, future events or otherwise.
However, your attention is directed to any further disclosures made on related
subjects in our subsequent news releases, annual and periodic reports filed with
the Securities and Exchange Commission on Forms 10-K, 10-Q and 8-K and Proxy
Statements on Schedule 14A.

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