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Written by Reed Timmer   
Friday, 17 July 2009 13:39
17july2009_tornadowatch 17july2009_ehiA tornado watch has been issued for parts of eastern Colorado for a very interesting northwesterly-flow High Plains severe weather setup.  Typically during tornado setups in eastern CO, you get persistent easterly upslope flow at low-levels with westerly flow aloft, but today southwesterly flow resides at the surface with very strong northwesterly flow aloft.  Both setups result in strong bulk shear, but today right-moving supercells will be moving in an almost due southerly direction.  Storms have already initiated over the Foot Hills and are moving southeast to the better moisture of the adjacent Plains.  As of the 18z RUC analysis, the best 0-3 km EHIs (which is my favorite parameter for High Plains setups) are mazimized over extreme northeast Colorado where surface winds are more backed, but I would not be surprised if higher values fill in further south as the day wears on.  Stay tuned for updates on the blog, and there should be some Colorado chasers streaming live video later on this afternoon.
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Discuss (4 posts)

NCtraveler
Colorado Magic possible today!
Jul 17 2009 19:56:37
"Colorado Magic" LOL! Very nice explanation, hope it pans out.
#17591

gasorg
Re:Colorado Magic possible today!
Jul 17 2009 23:25:10
Didn't the 5/22/08 Windsor, CO tornado have a northwesterly track?
#17612

sassy1984us
Re:Colorado Magic possible today!
Jul 20 2009 06:59:49
Well I live in Pueblo and I saw some pretty awesome sky yeasterday, but I didnt watch the news or anything, so do you know if any action happened in Colo.?
#17752
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Comments  

 
-1 #1 Caleb 2009-07-17 08:05
it could very well happen. CAPE is pretty high in NE Colorodo. The LLJ is decent about 60 kts maby a little higer than that.
 
 
+2 #2 JC Surfs 2009-07-17 08:37
In looking at the radar now... YES! I am in position northeast of Limon attm.. Its looking pretty promising out here.. Looking forward to some good activity soon.. Cheers.
 
 
0 #3 Heidi 2009-07-17 10:19
I just heard from Verne - he says there are injuries from hail to some people in vehicles on HWY 385 south of Burlington, CO. Possible tornado also!
 
 
-1 #4 JC Surfs 2009-07-17 11:02
We are on the I 70 a few miles from Burlington.. We observed the rotation from that cell.. It appears to be a gustnado from our angle.. Good wall cloud with a few funnels. We are currently in Stratton trying to get the cell that is tornado warned from the Akron vicinity... Kind of looks like it is fizzling out..

We saw a bunch of Harley's going east right into the Burlington cell.. What are those guys thinking !!!
 
 
0 #5 Heidi 2009-07-17 12:18
Verne just got creamed by baseball hail!
 
 
0 #6 iwannachase4life 2009-07-18 14:30
i want to try and talk to reed timmer 1 on 1, but i dont think it will ever happen :cry: it is my dream to go chasing with these guys, oh well
 

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