determining severe vs. non-severe squall lines

[Eric Stoner]

determining severe vs. non-severe squall lines/organized severe storms (a.k.a. multicells) (generally not supercell mode)
-what forecast parameters do you use?
apparently, the 0-3km SRH is used best for determining supercells from non-supercells (given some CAPE) (Rasmussen and Blanchard 1998 list 230m2/s2 as the optimal value for Supercells/tornadic-supercells vs. non-supercells)
-Is the 0-3km shear better than 0-3km SRH for determining if a squall line will be severe?
-Is the 0-6km shear is the way to go?
-How about 0-1km shear?
(0-3km shear and 0-1km shear are not typically on charts)
-Will the calculated storm motion (depending on the scheme) used for SRH represent the motion of individual elements? Or will it be representative of the squall line/system as a whole?
-Do you consider the risk for large hail and the risk for wind damage separately?
I'm not looking for "magic numbers" here, I want to know how forecasters go about this.
-
oops I meant to post this in Weather and Chasing forum.

 

[Damon Poole]

Here's a link to a self-paced course by COMET which will answer many, if not all of your questions. http://www.meted.ucar.edu/norlat/dl_svrconvection/index.htm. Register for the course, and take it at your own pace. There is no cost, and if you mess up on the quiz you can take it again. When you pass the course, you will get a completion certificate.

Good luck.

DCP2