NORWEST ASSET SECURITIES CORP
424B5, 1998-06-25
ASSET-BACKED SECURITIES
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SUPPLEMENT

(To Prospectus dated May 20, 1998 and Prospectus Supplement dated June 18, 1998)

                           $719,247,200 (Approximate)

                      Norwest Asset Securities Corporation
                                 (NASCOR[SM])
                                     Seller

               Mortgage Pass-Through Certificates, Series 1998-15
         Principal and interest payable monthly, commencing in July 1998



     Prospective  investors should be aware that notwithstanding the ratings for
the Class A-3, Class A-12 and Class A-18  Certificates as set forth in the table
entitled  "Ratings  of  Offered  Certificates"  on  page  S-5 of the  Prospectus
Supplement and in the first sentence of the first  paragraph  within the section
entitled "Ratings" on page S-88 of the Prospectus Supplement, the ratings of the
Class A-3, Class A-12 and Class A-18  Certificates  by Standard & Poor's ("S&P")
will be "AAAr". S&P assigns the additional rating of "r" to highlight classes of
securities that S&P believes may experience high volatility or high  variability
in expected returns due to non-credit risks.


LEHMAN BROTHERS
                       SALOMON SMITH BARNEY
                                                    EDWARD D. JONES & CO., L.P.
June 24, 1998


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