EXHIBIT 99.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned officer of Summit Financial Corporation (the "Company"), hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, and in connection with this Annual Report on Form 10-K for the year ended December 31, 2002 (the "Report), that, to such officer's knowledge: (1) The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company. Dated: March 17, 2003 /s/ J. Randolph Potter - ------------------------- J. Randolph Potter, President and Chief Executive Officer