wxbrad Posted April 18, 2011 Share Posted April 18, 2011 Sorry I didn't chime in prior to the outbreak but was working like 24 hours straight for many days. Finished a technical blog on why I believe the outbreak was so intense. http://wxbrad.com/?p=974 Love some feedback, Brad @wxbrad Link to comment Share on other sites More sharing options...
Ellinwood Posted April 18, 2011 Share Posted April 18, 2011 I would include some of the upper-level dynamics in play as well (500mb vort max, neg. tilt trough, UL jet). Grab some images off of twisterdata.com (top right - choose a model run like the 18z NAM from 4/16... this is time sensitive and will only last another couple of days). I pulled a bunch of the 12z and 18z NAM charts off the site if you need them. Link to comment Share on other sites More sharing options...
wxbrad Posted April 18, 2011 Author Share Posted April 18, 2011 I would include some of the upper-level dynamics in play as well (500mb vort max, neg. tilt trough, UL jet). Grab some images off of twisterdata.com (top right - choose a model run like the 18z NAM from 4/16... this is time sensitive and will only last another couple of days). I pulled a bunch of the 12z and 18z NAM charts off the site if you need them. Yeah agree those are all very important to the set-up, but was trying to focus on more of the mesoscale reasoning for such a conducive environment for tornadoes, especially long track. I've pull quite a few charts already will likely include that in my shear section, thanks for the feedback! Brad Link to comment Share on other sites More sharing options...
Ellinwood Posted April 18, 2011 Share Posted April 18, 2011 Yeah agree those are all very important to the set-up, but was trying to focus on more of the mesoscale reasoning for such a conducive environment for tornadoes, especially long track. I've pull quite a few charts already will likely include that in my shear section, thanks for the feedback! Brad Good deal... I just remember looking at the upper-levels on the 11th/12th and I knew that we'd be in for something big on the 16th based on these charts and a few other indications. Link to comment Share on other sites More sharing options...
WhiteoutWX Posted April 18, 2011 Share Posted April 18, 2011 Nice write-up, I hadn't realized how truly primed the atmosphere was for tornado formation. Link to comment Share on other sites More sharing options...
wolfpackmet Posted April 20, 2011 Share Posted April 20, 2011 What was the surface CAPE at the height of the outbreak? Did it ever make it over 2500 j/kg? If there was capping CIN in place before the main outbreak it helped keep the atmosphere primed. If the CAPE was at say 4500 j/kg, it could have been a wash and maybe we would have seen less well defined independent supercells. Also I know you talked about helecity and and all the sheer parameters but take a look at that hodograph?... pretty impressive. Link to comment Share on other sites More sharing options...
SBUWX23 Posted April 20, 2011 Share Posted April 20, 2011 What was the surface CAPE at the height of the outbreak? Did it ever make it over 2500 j/kg? If there was capping CIN in place before the main outbreak it helped keep the atmosphere primed. If the CAPE was at say 4500 j/kg, it could have been a wash and maybe we would have seen less well defined independent supercells. Also I know you talked about helecity and and all the sheer parameters but take a look at that hodograph?... pretty impressive. From what I saw on the mesoanalysis, it was 1,000 to 1,500 J/kg SB and ML CAPE Link to comment Share on other sites More sharing options...
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