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View Full Version : Radar grabs from the 4/13/06 Iowa City Tornado?



Derek Weston
08-27-2007, 12:22 AM
Anybody have any? I'd absolutely love to get my hands on them, if you'd be willing to share.

Although I'd be willing to take any grabs from that day's particular outbreak.

http://www.crh.noaa.gov/dvn/WeatherEvents/20060413Tornadoes/index.php

(sorry if this isn't the correct forum)

Bob Schafer
08-27-2007, 09:49 AM
I'm sure you want higher-res images than this, but you can get archived regional radar imagery here:

http://locust.mmm.ucar.edu/case-selection/

It looks like you could also order the data from here:

http://www.ncdc.noaa.gov/nexradinv/displaygraphs.jsp?mm=04&dd=14&yyyy=2006&tz=GMT&product=AAL2&id=KDMX&begdate=03%2F13%2F1995&enddate=08%2F26%2F2007

Good luck!

Bob

Andy Wehrle
08-27-2007, 11:30 AM
When I get back to UWGB in a few days, I'll dig through my archived GR 3 captures to see what I can come up with.

rdale
08-27-2007, 11:32 AM
You can get it free at http://has.ncdc.noaa.gov

Bill Schintler
08-27-2007, 12:53 PM
I have a collection of data (SFC, UA, profiler, radar, satellite, soundings, etc) from that day. PM me and I'll zip it and send it. BTW, I live in Iowa City. The Iowa City tornado path started about 1/4 mile from my house. I watched the nighttime tornado as it tore through the city, as well as an earlier tornado west of Cedar Rapids.

This is a very interesting day to do a case study of. Basically, the synoptic setup had a WF well to the north, along the IA/MN border. A look at morning data suggested that that area would be the chase target for afternoon storms. Morning dew points were very low throughout IA - in the 40's in all but the southwest part of the state. As the day progressed, a narrow wedge of rich SFC moisture surged northeast, reaching central IA by mid-afternoon. Meanwhile, a compact mid-level disturbance lifted to the NE out of KS - examine the profiler data. Models based on 12Z data underestimated the strength of this feature. Storms fired in central IA by late afternoon, and moved E towards eastern IA. SFC flow became increasingly backed in response to the shortwave. The moisture arrived in Eastern IA just an hour or two prior to the arrival of the storms, and LCL’s dropped rapidly after 00Z (00Z DVN sounding – only 60 miles to the east – still indicated poor LLVL moisture and an LCL of nearly 2000m AGL)! And that was only 90 minutes before the tornado hit IC.

- bill