Thundersnow12 Posted August 4, 2011 Share Posted August 4, 2011 I'm pressed for time right now so can't put alot up but thought I would make this and have others add any radar images, graphics, maps, stories etc on this event. Here is the good summary by LOT with the radar image and storm reports http://www.crh.noaa.gov/news/display_cmsstory.php?wfo=lot&storyid=17139&source=2 Link to comment Share on other sites More sharing options...
Hoosier Posted August 4, 2011 Share Posted August 4, 2011 The Griffith tornado started just east of my cousin's house. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted August 4, 2011 Author Share Posted August 4, 2011 taken from the orginal thread on Eastern DVN afternoon AFD LOOKING AT UPSTREAM FEATURES AND SOME CONCEPTUAL TOOLS...UNFORTUNATELY FEEL THE NAM MAY BE MORE ON TRACK WITH THE SCENARIO THAT MAY UNFOLD. THINK SCTRD POST FRONTAL CONVECTION SEEN NOW ON REGIONAL 88D LOOPS FROM SOUTHWEST IA THROUGH SOUTHWEST WI... ALONG WITH THE FRONT ITSELF AND APPROACHING UPPER WAVE OUT OF SD WILL ERODE WEST-NORTHWEST FLANK OF STRONG CAP END IGNITE STORMS THAT WILL QUICKLY BECOME SFC BASED OVER CENTRAL AND NORTHEAST IA. AS THE STORMS GOBBLE COPIOUS AMOUNTS OF CAPE/POTENTIAL ENERGY THAT HAS BUILT UP ALL AFTERNOON...DEVELOPMENT COULD BE EXPLOSIVE AND SUPERCELLULAR IN NATURE. EXPECT MOST OF THIS DEVELOPMENT JUST UPSTREAM...BUT WILL HAVE TO WATCH FOR EVENING INITIATION IN THE NORTHWEST PART OF THE DVN CWA AS WELL. WITH EXTENT OF HIGH CAPES IN PLACE...INCOMING SHEAR PROFILES AND MID LEVEL WIND FIELDS ALL SUPPORT STORMS DEVELOPING INTO BOWING SEGMENTS OR EVEN A DERECHO TYPE SYSTEM AS THEY PROPAGATE EAST-SOUTHEAST ALONG FLOW VECTORS...WHICH WOULD IMPACT MUCH OF THE DVN CWA BY MID EVENING AND WELL INTO THE OVERNIGHT HOURS. WIDESPREAD DAMAGING WIND REMAINS THE DOMINANT THREAT...WITH POTENTIAL OF 70+ MPH VALUES OR EVEN 80+ MPH IN THE CRUTCH OF THE BOWS. IF SOMETHING CAN TAKE OFF AND PROPAGATE ALONG THE MAIN WARM FRONT IF IT LINGERS IN THE NORTHERN CWA...EXTENT OF HIGH CAPE SCENARIO WOULD SUPPORT THE POTENTIAL OF A RATHER STRONG TORNADO IN ENHANCED SHEAR FIELDS. MANY VARIABLES TO PLAY OUT AND STILL SOME QUESTIONS FOR MORE OF A HIGH CONFIDENCE FCST...BUT WILL EXPAND LIKELY POPS SOME SOUTHWARD AND MAINTAIN SVR WORDING WITH DAMAGING WINDS FOR MOST OR ALL THE DVN CWA TONIGHT INTO TUE MORNING. Link to comment Share on other sites More sharing options...
River Card Posted August 4, 2011 Share Posted August 4, 2011 If memory serves me correct I think that month had 2 derechos fairly close to each other...but yeah that was amazing to see that cloud just whoosh in and how fast and how far it marched on.....one of the cooler things I have seen. Link to comment Share on other sites More sharing options...
tornadotony Posted August 4, 2011 Share Posted August 4, 2011 The Griffith tornado started just east of my cousin's house. Same with my mom's cousin. They live in the subdivision on the other side of Cline Ave. from the strip mall that was partially totaled. The thing I will remember most about that event (other than the anomalously destructive Griffith tornado) was that it is probably the only wind event I can recall that featured an audible roar a couple minutes prior to its arrival (from a combo of the wind and the still-unmatched and unprecedented electrical activity that it featured). Link to comment Share on other sites More sharing options...
Chicago Storm Posted August 4, 2011 Share Posted August 4, 2011 This event produced one of the best light shows I have seen. I was under a tornado warning for a time, with a confirmed EF-1 about 8 miles southeast of here in Bloomingdale. The wind wasn't too bad, as we only gusted up around 55mph with little in the way of tree damage. Power ended up being out for about 3 days. Link to comment Share on other sites More sharing options...
Chicago WX Posted August 5, 2011 Share Posted August 5, 2011 My parents live in the circled area in Kankakee on LOT's write up. Nothing major at their house thankfully. But just to the south of them, along Jeffery street, there was pretty good tree damage. Link to comment Share on other sites More sharing options...
Hoosier Posted August 5, 2011 Share Posted August 5, 2011 Same with my mom's cousin. They live in the subdivision on the other side of Cline Ave. from the strip mall that was partially totaled. The thing I will remember most about that event (other than the anomalously destructive Griffith tornado) was that it is probably the only wind event I can recall that featured an audible roar a couple minutes prior to its arrival (from a combo of the wind and the still-unmatched and unprecedented electrical activity that it featured). Yeah I heard about the light show. I think Skilling commented that one of his longtime colleagues who had lived in the area for decades thought it was best lightning display he had ever seen. Link to comment Share on other sites More sharing options...
cyclone77 Posted August 5, 2011 Share Posted August 5, 2011 I remember being disappointed that the storms fired to the north and sent an outflow through the QC killing our instability and effectively ending prospects for further severe development. I drove up to Morrison and barely caught the southern edge of it before it raced eastward towards Chicago. Link to comment Share on other sites More sharing options...
OceanStWx Posted August 5, 2011 Share Posted August 5, 2011 I know I've said it before, but this was my first official day on the job in the NWS (at DVN of course). I remember I was called back in during the evening shift just to see what severe weather ops were like. The rest of it was kind of a blur, I wasn't sure I'd ever be good enough to do that kind of job. Needless to say, I was ready for radar training to begin the next month. I also distinctly remember that heading out for the evening balloon launch we hit 88/80 at one point. It was a lot for a kid from the Northeast to take in. Link to comment Share on other sites More sharing options...
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