• 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.

Cyclic Supercells

Joined
Jan 11, 2006
Messages
372
Location
Winnipeg, Manitoba
I find the concept of cyclic supercells to be real fascinating, the way the storms intensify, plateau then go through a sort of weakening phase then explode again. They seem to be some of the most prolific producers of severe weather.

What I don't completely understand is how they do what they do. Just taking an educated guess, my thoughts were that the dominant mesocyclone becomes occluded later in its lifespan, and eventually dissipates. Then possibly the outflow from the storm triggers a new updraft region which generates a new meso.

Is there anyone who can explain to me how this happens, or point me in the direction of a web resource?

Thanks, in advance!

John
VE4 JTH
 
Although this is long, I'd really recommend giving the following paper a read-through (the dissertation of Edwin Addlerman, an OU alumn). Of course, you won't need to read all of it, but the intro, discussion, and conclusions will be helpful in understanding some aspects of cyclic mesocyclones and supercells. Note that this is over 100 MB, so you'll probably want to avoid downloading it if you are on a slow (i.e. dial-up) connection. The paper deals with cyclic mesocyclones from a numerical modeling standpoint, but it has plenty of info that you'll find interesting and that will shed light on how supercells "cycle".

--> Adlerman, Edwin, 2003: NUMERICAL SIMULATIONS OF CYCLIC STORM BEHAVIOR: MESOCYCLOGENESIS AND TORNADOGENESIS
 
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