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