<ARTICLE>        UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM SOUTHWESTERN
PUBLIC SERVICE COMPANY CONDENSED BALANCE SHEET AS OF JUNE 30, 1999 AND CONDENSED
STATEMENTS  OF INCOME AND CASH FLOWS FOR THE SIX MONTHS  ENDED JUNE 30, 1999 AND
IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>            0000092521
<NAME>           Southwestern Public Service Company
<MULTIPLIER>                                                  1,000

                                               
<PERIOD-TYPE>                                                 6-MOS
<FISCAL-YEAR-END>                                       DEC-31-1998
<PERIOD-END>                                            JUN-30-1999
<BOOK-VALUE>                                               PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                 1,755,500
<OTHER-PROPERTY-AND-INVEST>                                 124,736
<TOTAL-CURRENT-ASSETS>                                      140,753
<TOTAL-DEFERRED-CHARGES>                                    170,787
<OTHER-ASSETS>                                                    0
<TOTAL-ASSETS>                                            2,191,776
<COMMON>                                                          0
<CAPITAL-SURPLUS-PAID-IN>                                   348,402
<RETAINED-EARNINGS>                                         393,676
<TOTAL-COMMON-STOCKHOLDERS-EQ>                              742,078
<PREFERRED-MANDATORY>                                       100,000
<PREFERRED>                                                       0
<LONG-TERM-DEBT-NET>                                        630,531
<SHORT-TERM-NOTES>                                            9,000
<LONG-TERM-NOTES-PAYABLE>                                         0
<COMMERCIAL-PAPER-OBLIGATIONS>                               49,697
<LONG-TERM-DEBT-CURRENT-PORT>                                90,113
<PREFERRED-STOCK-CURRENT>                                         0
<CAPITAL-LEASE-OBLIGATIONS>                                       0
<LEASES-CURRENT>                                                  0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                              570,357
<TOT-CAPITALIZATION-AND-LIAB>                             2,191,776
<GROSS-OPERATING-REVENUE>                                   426,666
<INCOME-TAX-EXPENSE>                                         27,848
<OTHER-OPERATING-EXPENSES>                                  326,977
<TOTAL-OPERATING-EXPENSES>                                  354,825
<OPERATING-INCOME-LOSS>                                      71,841
<OTHER-INCOME-NET>                                            4,460
<INCOME-BEFORE-INTEREST-EXPEN>                               76,301
<TOTAL-INTEREST-EXPENSE>                                     30,075
<NET-INCOME>                                                 46,226
<PREFERRED-STOCK-DIVIDENDS>                                       0
<EARNINGS-AVAILABLE-FOR-COMM>                                46,226
<COMMON-STOCK-DIVIDENDS>                                     42,368
<TOTAL-INTEREST-ON-BONDS>                                    24,834
<CASH-FLOW-OPERATIONS>                                       44,477
<EPS-BASIC>                                                 0.000
<EPS-DILUTED>                                                 0.000