Date: Wed, 31 Mar 2004 15:14:22 -0700 (MST) From: Bob Rozumalski Subject: Announcement: National WES case study #12 now Available Greetings All, I'm pleased to announce a new addition to the National Case Study Library: Case 12: 28 April 2002 Severe Weather Outbreak Author : Stephen Parker - SOO/MRX CASE SUMMARY On 28 Apr 2002, a series of non-tornadic supercells moved across the Southern Appalachian region. This westerly flow event spawned 8 supercells that affected the MRX CWA between about 17Z and 00Z. These storms had classic supercell characteristics (hook echoes, repeated BWERs, "spread eagle" appearance, etc.) and formed in a high cape (about 2500 J/kg) and high shear (0-1 km SRH about 150 m2/s2, 0-3 km SRH at or above 300 m2/s2, and BRN shear between 100 and 135) environment, yet produced no documented tornadoes in our CWA. Hail up to baseball size was reported, along with numerous occurrences of golfball-sized hail and wind damage. There are many possible training objectives for this case. These could include, but are not limited to: supercell identification, evolution, interrogation, and structure; three-body scatter spike identification and utility; assessment of low-level rotation; WER and BWER identification, evolution, interrogation, and structure; and tornado warning false-alarm issues. The case is available on DVD along with a companion simulation guide from the SOO/STRC National Case Study Library: http://strc.comet.ucar.edu/csl Let me know if you have any questions. Regards, Bob +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Robert A. Rozumalski NWS National SOO Science and Training Resource Coordinator COMET/UCAR PO Box 3000 Phone: 303.497.8356 Boulder, CO 80307-3000 FAX: 303.497.8491 SOO/STRC Home Page: http://strc.comet.ucar.edu +++++++++++++++++++++++++++++++++++++++++++++++++++++++++