Well, we tried really hard to get something in CASA, but, alas, the atmosphere didn’t want to cooperate with us.

We had Dan P. and Dave H. work with CASA and Dan M. and Ron P. worked again with PAR. This configuration was suggested so that we have an experienced user during realtime ops. (These same forecasters worked the same respective stations last night).

Regarding the weather scenario – we had a few attempts at initiation in the extreme Ern part of the CASA domain, but that was the best we saw. Storms initiated along the cold front to the NE of the OKC area and the PAR remained focused on those storms during the duration of the evening. These storms moved very slowly – remaining anchored to the front. There were a number of severe warnings and one storm near Prague that had some broad low-level rotation (which tightened up from time-to-time) but never drew a warning.

One of the interesting things we tried tonight was to issue PROBWARN on PAR. (Dan M. is an old pro with both) Should be an interesting case to review from that sense.

As I type (~0110z), we have legitimate echo on the edge of the CASA domain.

Speaking of CASA, Dan P. offers part of a discussion (while waiting for *anything* to happen in CASA) regarding Three-Body-Scatter-Spikes (TBSS). Given the low-level area of focus of CASA, TBSS will be rarely, if at all, seen on this network. This, of course is an often-used indicator for severe hail.

Here is a snapshot of our PAR/PROBWARN exercise

And this is the best we could get for CASA (after 3 hours of staring intently at the screen). Actually, this also shows the 3DVAR Wind analysis product (on the left).

Kevin Manross (EWP Weekly Coordinator, 12-16 May)