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Mayhem in May, How Baron Tools Saved the Day: 21 & 22 May 2004

John McLaughlin, KCCI-TV Daryl Herzmann, Iowa State University. Mayhem in May, How Baron Tools Saved the Day: 21 & 22 May 2004. KCCI's Umbrella of Protection. 60+ SchoolNet based real-time weather sensors 13 Live WebCameras 4 Stormchase vehicles Instant Messaging with NWS

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Mayhem in May, How Baron Tools Saved the Day: 21 & 22 May 2004

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  1. John McLaughlin, KCCI-TV Daryl Herzmann, Iowa State University Mayhem in May, How Baron Tools Saved the Day:21 & 22 May 2004

  2. KCCI's Umbrella of Protection • 60+ SchoolNet based real-time weather sensors • 13 Live WebCameras • 4 Stormchase vehicles • Instant Messaging with NWS • Storm Spotter Hotline • Baron Fastrac/VIPIR

  3. 21 May 2004 Talking Points • Severe convection the previous night produced an extremely strong outflow boundary over Northern Iowa. • The warm sector cleared out and warmed nicely during the day • The instability axis was lined up with the outflow boundary by 18z.

  4. 2 PM

  5. 2 PM view from Webster City Looking NNW Note the LCL

  6. 3 PM: Points to Ponder • Will our current convective cluster NE of DSM weaken as it moves to the SE? • Situational awareness: Where is the tornado threat?

  7. 4 PM : Convection fires in NW Iowa.

  8. 5 PM: View from Rockwell City

  9. 5-6 PM: Reports • Numerous tornadoes in Jones, Linn, and Benton County. These tornadoes are with the cluster to the east of Des Moines. • 5:19PM Softball hail 5 S Spencer (Clay County)

  10. Begin Case Study at 5:47 PM

  11. 6 PM: Looks to be wall2wall weather!

  12. 6:10 PM: Tornado reported near Rolfe (Pocahontas County)

  13. 6:20 PM: Lights ripped off of sheriff's car (Pocahontas County) 6:22 PM: Tornado reported 2 E of Rolfe (Pocahontas County)

  14. 6:23 PM: Tornado reported in Bradgate (Humboldt County)

  15. Damage at Bradgate

  16. 21 May Summary

  17. 22 May: talking points • Massive amounts of convection blow up the evening of the 21rst and work SE over night. • The combined warm front / outflow boundary was extremely strong. • Onset of convection would probably be a bit later due to strengthening CAP and vort max still in Western NE

  18. 12z OAX (Omaha) Sounding

  19. 0z OAX: Danger, Danger

  20. (18:37:46) kcciwhite: we are still west of fontanelle (18:38:11) kcciwhite: check out our cam (18:38:37) nwsdmx2: rotating wall cloud near woodward (18:40:08) kcciwhite: in fontanelle (18:45:19) kcciwhite: we are heading north on IA 25 out of Greenfield.... see a nice lowering that way Instant Messaging with the NWS

  21. (18:51:43) nwsdmx2: plenty of rotation in the wall cloud, moving se toward madrid

  22. (18:55:15) kcciwx: rapid hook forming sw of stuart on lsd (18:55:15) kcciwhite: that's a 10-4. we are seeing lowering (18:55:15) kcciwhite: we are south of that on hwy. 5 about 5 mi. north of greenfield (18:55:37) kcciwhite: cam pointed right at it (18:55:39) kcciwx: Seeing anything?? (18:56:15) kcciwhite: just lowerings, just some upward motion (18:57:33) kcciwhite: some good scud (18:57:53) kcciwhite: we are on 180th street in adair county going east (18:58:00) kcciwhite: turning north on orange road (18:58:21) nwsdmx2: baseball hail 2 n madrid Live Reports from the field

  23. (19:06:52) kcciwx: tornado south of menlo on the ground (19:06:56) nwsdmx2: tornado reported just sw of stuart (19:07:00) nwsdmx2: ham report The Photogenic Stuart Tornado

  24. Another Shot of Stuart Tornado

  25. (19:44:27) kcciwx: tornado by maxwell..public (19:44:33) kcciwx: public report (19:45:03) nwsdmx2: 4ne dexter, tornado ham radio report (19:46:51) nwsdmx2: tornado just w of maxwell now! (19:47:38) kcciwx: 2 inch hail in camberage (19:50:43) nwsdmx2: tornado 3w of adel now! Chaos Ensues

  26. NEXRAD + Warnings @ 8 PM

  27. (01:36 AM) john_mcweather: just got stopped by ankeny pd so they could look at the radar! young kid though it was cool Still storm chasing at 2 AM !!!

  28. Event Tornado Warnings

  29. Summary Stats • Tornadoes by day for Iowa: • 15 (May 21rst) • 19 (May 22nd) • 110 Tornadoes so far for 2004 (Record)

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