SECURITIES AND EXCHANGE COMMISSION

Washington, D. C.

FORM U-6B-2

Certificate of Notification

Filed by a registered holding company or subsidiary thereof pursuant to Rule U-20-(d) [Reg. Section 250.20, Paragraph 36,652] or U-47 [Reg. Section 250.47, Paragraph 36,620] adopted under the Public Utility Holding Company Act of 1935

Certificate is filed by: Southwestern Public Service Company (the "Company")

This certificate is notice that the above named company has issued, renewed or guaranteed the security or securities described herein which issue, renewal or guaranty was exempted from the provisions of Section 6(a) of the Act and was neither the subject of a declaration or application on Form U-1 nor included within the exemption provided by Rule U-48 [Reg. Section 250.48, Paragraph 36,621].

1.    Type of the security or securities: Commercial Paper

2.    Issue, renewal or guaranty: renewal of $250 million commercial paper program

3.    Principal amount of each security: Not applicable

4.    Rate of interest per annum of each security: will be determined upon issue

5.    Date of issue, renewal or guaranty of each security: December 20, 1999

6.    If renewal of security, give date of original issue: program initiated May, 1994

7.    Date of maturity of each security: date to be determined upon issue, not to exceed
       270 days

8.    Name of the person to whom each security was issued, renewed or guaranteed: public
       issue

9.    Collateral given with each security, if any: The commercial paper program is backed
       by credit facilities in an amount equal to the size of the program.

10.  Consideration received for each security: Not applicable

11.  Application of proceeds of each security: Net proceeds will be used for current
       transactions.

12.  Indicate by a check after the applicable statement below whether the issue, renewal
       or guaranty of each security was exempt from the provisions of Section 6(a) because of:

       a)   the provisions contained in the first sentence of Section 6(b): Not applicable
       b)   the provisions contained in the fourth sentence of Section 6(b): Not applicable
       c)   the provisions contained in any rule of the commission other than Rule U-48:

                                    All issuances.

13.  If the security or securities were exempt from the provisions of Section 6(a) by virtue
       of the first sentence of Section 6(b), give the figures which indicate that the security
       or securities aggregate (together with all other than outstanding notes and drafts of a
       maturity of nine months or less, exclusive of days of grace, as to which such
       company is primarily or secondarily liable) not more than 5 percentum of the
       principal amount and par value of the other securities of such company then
       outstanding. (Demand notes, regardless of how long they may have been
       outstanding, shall be considered as maturing in not more than nine months for
       purposes of the exemption from Section 6(a) or the Act granted by the first sentence
       of Section 6(b).

                                    Not applicable.

14.  If the security or securities are exempt from the provisions of Section 6(a) because of
       the fourth sentence of Section 6(b), name the security outstanding on January 1,
       1935, pursuant to the terms of which the security or securities herein described have
       been issued.

                                    Not applicable.

15.  If the security or securities are exempt from the provisions of Section 6(a) because of  any rule of the Commission        other than Rule U-48 [Reg. Section 250.48, Paragraph 36,621] designate the rule under which exemption is
       claimed.

                                    Rule 52(a)

                                                                       Southwestern Public Service Company

                                                                       By: /s/ Nancy E. Felker
                                                                       Nancy E. Felker
                                                                       Assistant Treasurer

Date: December 20, 1999