Greg Manarik
A good writeup on the storm the spawned the Plainfield, Illinois tornado August 28th 1990 the strongest August tornado to ever hit the U.S.
http://www.nislwx.com/coverstory2.html
http://www.nislwx.com/coverstory2.html
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After witnessing the continued decrease of involvement in the SpotterNetwork staff in serving SN members with troubleshooting issues recently, I have unilaterally decided to terminate the relationship between SpotterNetwork's support and Stormtrack. I have witnessed multiple users unable to receive support weeks after initiating help threads on the forum. I find this lack of response from SpotterNetwork officials disappointing and a failure to hold up their end of the agreement that was made years ago, before I took over management of this site. In my opinion, having Stormtrack users sit and wait for so long to receive help on SpotterNetwork issues on the Stormtrack forums reflects poorly not only on SpotterNetwork, but on Stormtrack and (by association) me as well. Since the issue has not been satisfactorily addressed, I no longer wish for the Stormtrack forum to be associated with SpotterNetwork.
I apologize to those who continue to have issues with the service and continue to see their issues left unaddressed. Please understand that the connection between ST and SN was put in place long before I had any say over it. But now that I am the "captain of this ship," it is within my right (nay, duty) to make adjustments as I see necessary. Ending this relationship is such an adjustment.
For those who continue to need help, I recommend navigating a web browswer to SpotterNetwork's About page, and seeking the individuals listed on that page for all further inquiries about SpotterNetwork.
From this moment forward, the SpotterNetwork sub-forum has been hidden/deleted and there will be no assurance that any SpotterNetwork issues brought up in any of Stormtrack's other sub-forums will be addressed. Do not rely on Stormtrack for help with SpotterNetwork issues.
Sincerely, Jeff D.
Tim Vasquez
EF5
- Joined
- Dec 4, 2003
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- 3,411
18Z surface chart. Surprisingly evident is the lack of easterly flow... a good case for the use of hodographs.
Greg Manarik
Plainfield Tornado Event
With LI's past -12 and a strong NWLY jet overhead anything can happen.
With LI's past -12 and a strong NWLY jet overhead anything can happen.
Robert Dewey
EF5
Re: Plainfield Tornado Event
With the northwesterly jet aloft, winds at the SFC out of the SW would still produce 90 degrees of shear. Same thing goes for if you have a southwesterly flow aloft, and a southeasterly flow at the SFC.
With the northwesterly jet aloft, winds at the SFC out of the SW would still produce 90 degrees of shear. Same thing goes for if you have a southwesterly flow aloft, and a southeasterly flow at the SFC.
Gabe Garfield
EF5
This is true...
As Tim V. mentioned, the most important thing is the hodograph created by such a wind profile in combination with the storm motion. Even with somewhat minimal turning, if the storm motion deviates significantly to the right, you can get quite a bit of storm relative helicity.
Gabe
Dave Carroll
EF1
Plainfield sounding
The one thing that sticks in my mind from Plainfield is the positively buoyant area on the soundings that fateful day...not only the LI, but the incredible scope & depth of the + area throughout the atmosphere. With a modest cap, and CAPE of 8000j/kg, no wonder things went ballistic that afternoon!
-DC
The one thing that sticks in my mind from Plainfield is the positively buoyant area on the soundings that fateful day...not only the LI, but the incredible scope & depth of the + area throughout the atmosphere. With a modest cap, and CAPE of 8000j/kg, no wonder things went ballistic that afternoon!
-DC
The sounding from 00Z from Peoria that day was extremely unstable, as stated nearly 8000 J/kg for surface parcel CAPE. However, the 100 mb mixed layer CAPE was probably more representative at 5500 J/kg. Still extremely unstable.
[Broken External Image]:http://members.cox.net/geophi/plainfield_PIA.png
[Broken External Image]:http://members.cox.net/geophi/plainfield_PIA.png
Nick Smith
EF2
That severe thunderstorm watch text is strange...doesn't match the narrative style in use at the time. The one shown there looks like the style adopted in early 1997.
I'd love to see scope photos of that storm.
I'd love to see scope photos of that storm.
Greg Manarik
Watch
Nick youre right. I converted the watch data nws gave me on paper to the 1997 style because it is easier to read. Thats what I think.
Nick youre right. I converted the watch data nws gave me on paper to the 1997 style because it is easier to read. Thats what I think.
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