Hoosier Posted February 5, 2012 Share Posted February 5, 2012 Was searching for something else when I came across this event. It hit Streamwood on the morning of June 29, 1990 with estimated winds anywhere from 110-150 mph (Storm Data says 150 mph) and damaged or destroyed numerous buildings. What I find remarkable is that radar/eyewitnesses observed no rain during the event...something you might expect with a dry microburst in the Plains or western states. The Peoria RAOB from 12z Jun 29 reveals a pretty moist column and no surface based instability and a check of some maps suggests a similar environment over northeast IL. Here are a couple articles from the Chicago Tribune for anyone who is interested. Also includes some remarks from Dr. Fujita. http://articles.chicagotribune.com/1990-06-30/news/9002220746_1_microburst-tornado-industrial-park http://articles.chicagotribune.com/1990-07-01/news/9002230069_1_tornadoes-microbursts-tetsuya-fujita Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 oh hai there's a great write-up on this event...i'll post it when i find where i saved it. Link to comment Share on other sites More sharing options...
Hoosier Posted February 5, 2012 Author Share Posted February 5, 2012 oh hai there's a great write-up on this event...i'll post it when i find where i saved it. Cool. This thread was calling your name. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 here's news coverage of the aftermath. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 oh hai there's a great write-up on this event...i'll post it when i find where i saved it. nevermind, looks like the link is "dead". it was a small excerpt from a write-up/research done by Ted Fujita on the event. Link to comment Share on other sites More sharing options...
cyclone77 Posted February 5, 2012 Share Posted February 5, 2012 Wow, if that amount of damage happened in less than a minute the winds had to be very high. Sure would love to dig into some high-res LII data from this, but that is obviously impossible lol. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 Cool. This thread was calling your name. i have always wanted to do some sort of case study on the event, but the lack of radar data hurts. Link to comment Share on other sites More sharing options...
cyclone77 Posted February 5, 2012 Share Posted February 5, 2012 Usually extreme "straight-line" wind damage like that is associated with a meso vortex. It seems almost hard to believe the thunderstorm was in a decaying stage when it produced that type of damage. Link to comment Share on other sites More sharing options...
Hoosier Posted February 5, 2012 Author Share Posted February 5, 2012 Usually extreme "straight-line" wind damage like that is associated with a meso vortex. It seems almost hard to believe the thunderstorm was in a decaying stage when it produced that type of damage. I read that article again and it makes it sound like the parent thunderstorm wasn't even near that area. Talk about weird. Link to comment Share on other sites More sharing options...
cyclone77 Posted February 5, 2012 Share Posted February 5, 2012 I read that article again and it makes it sound like the parent thunderstorm wasn't even near that area. Talk about weird. Hmm, that is just plain bizarre. Normally destruction like that so far away from the downdraft/precip area would be tornadic. However if Fujita did a survey and said it wasn't tornadic you obviously gotta side with that lol. Found this from ILX... June 29, 1990 A microburst wind estimated around 150 mph did extensive damage in the town of Streamwood, in the Chicago metro area. At least $10 million damage was done to 25 stores and industrial buildings. Radar and eyewitness accounts indicated no rain or thunderstorms in the immediate vicinity of the area at the time. Link to comment Share on other sites More sharing options...
cyclone77 Posted February 5, 2012 Share Posted February 5, 2012 I tried to find the archived satellite images from this day on NCDC, but unfortunately on this day they don't have an images beyond 03z lol. Guess it will remain a mystery. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 By the way, DPA/ORD/RFD all reported TS from around 1-10AM. MLI/MSN/MKE had a round or two in and around that time frame too... So there were storms at the location of the event, and based on DPA/ORD...during the event too. ORD had a gust to 37mph around 3AM and to 38mph at 8AM. DPA gusted to 40mph from around 2:30-3AM and to 29mph at 8AM. Based on remarks from ORD OBS, there were two SE moving lines of storms. Link to comment Share on other sites More sharing options...
Hoosier Posted February 5, 2012 Author Share Posted February 5, 2012 By the way, DPA/ORD/RFD all reported TS from around 1-10AM. MLI/MSN/MKE had a round or two in and around that time frame too... So there were storms at the location of the event, and based on DPA/ORD...during the event too. ORD had a gust to 37mph around 3AM and to 38mph at 8AM. DPA gusted to 40mph from around 2:30-3AM and to 29mph at 8AM. Based on remarks from ORD OBS, there were two SE moving lines of storms. I noticed that too. But then why do the reports say that there was nothing there? Link to comment Share on other sites More sharing options...
cyclone77 Posted February 5, 2012 Share Posted February 5, 2012 By the way, DPA/ORD/RFD all reported TS from around 1-10AM. MLI/MSN/MKE had a round or two in and around that time frame too... So there were storms at the location of the event, and based on DPA/ORD...during the event too. ORD had a gust to 37mph around 3AM and to 38mph at 8AM. DPA gusted to 40mph from around 2:30-3AM and to 29mph at 8AM. Based on remarks from ORD OBS, there were two SE moving lines of storms. Looking at the PSU NARR data, it looks like their was a heat dome parked just to the southwest. The typical "ring of fire" type pattern that sets up in mid Summer. It looks like a complex blew up somewhere over southern WI/northern IL, and moved generally southeast and eventually went though Indiana. Kind of looks like a nice derecho setup, but it's very hard to tell for sure given the limited data/analysis that I can find. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 Looking at the PSU NARR data, it looks like their was a heat dome parked just to the southwest. The typical "ring of fire" type pattern that sets up in mid Summer. It looks like a complex blew up somewhere over southern WI/northern IL, and moved generally southeast and eventually went though Indiana. Kind of looks like a nice derecho setup, but it's very hard to tell for sure given the limited data/analysis that I can find. Nice speed max and LLJ.... Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 5, 2012 Share Posted February 5, 2012 I noticed that too. But then why do the reports say that there was nothing there? that's what's odd about it. other than that, everything points towards it being associated with some sort of MCS like activity. Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 7, 2012 Share Posted February 7, 2012 the reports of no other weather activity at the time of the event have to be incorrect. Link to comment Share on other sites More sharing options...
Hoosier Posted February 7, 2012 Author Share Posted February 7, 2012 the reports of no other weather activity at the time of the event have to be incorrect. This thing is hard to figure. There were storms in the area based on the surrounding obs but is it possible that nothing was happening right over Streamwood? Link to comment Share on other sites More sharing options...
Chicago Storm Posted February 7, 2012 Share Posted February 7, 2012 This thing is hard to figure. There were storms in the area based on the surrounding obs but is it possible that nothing was happening right over Streamwood? it's hard to believe. crazier things have happened though... i guess it will continue to be a mystery. Link to comment Share on other sites More sharing options...
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