| | P1.2 | Uncovering the Physical Mechanisms Responsible for the "Mystery" Boundary on May 3 Todd M. Crawford, NOAA/NSSL and CIMMS/Univ. of Oklahoma, Norman, OK; and H. B. Bluestein |
| | P1.3 | Warning Response and Risk Behavior in the 3 May 1999 Oklahoma City Long Track Violent Tornado Matthew D. Biddle, Univ. of Oklahoma, Norman, OK |
| | P1.4 | Verification of the tornado events in the Norman Oklahoma NWSFO county warning area for the May 3, 1999 severe weather outbreak Gregory J. Stumpf, NOAA/NSSL and CIMMS/Univ. of Oklahoma, Norman, OK; and D. Speheger and D. W. Burgess |
| | P1.5 | Use of vehicles to flee the 3 May 1999 Oklahoma City Tornado: Reasons and relative injury rates Barbara Hammer, Kent State Univ., Kent, OH; and T. Schmidlin |
| | P1.6 | Lightning relative to other tornadic storm parameters on 3 May 1999 Donald R. MacGorman, NOAA/NSSL, Norman, OK; and E. Spencer, K. Cummins, and J. Cramer |