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 Quarterly Report on Form 10-Q for the period year ended March 31, 2003 (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: May 7, 2003 /s/ J. Randolph Potter - ------------------------- J. Randolph Potter, President and Chief Executive Officer The foregoing certification is being furnished solely pursuant to 18 U.S.C. 1350 and is not being filed as part of the Report or as a separate disclosure document. A signed original of this written statement required by Section 906 has been provided to Summit Financial Corporation and will be retained by Summit Financial Corporation and furnished to the Securities and Exchange Commission or its staff upon request.