CSTAR High-Shear Low-CAPE Conference Call Notes – August 2015

The call occurred on Tuesday, August 25th, from 11AM to around 1145 AM EST. There were participants from NC State, AKQ, CAE, CHS, ILN, MHX, RAH and RNK.

A recording of the call is available at… https://goo.gl/TFeOfo

1) Research update from Jessica King on the HSLC process study using modeling and emulated radar sampling.   The slide deck is available for downloading at https://goo.gl/soVvWK

  • picJessica’s first main point is that they are finding surface temperature and moisture increases to account for most of the changes in CAPE in some cases, while in other cases, another mechanism is causing upper level destabilization (e.g., large scale lifting and the release of potential instability).
  • In the few null simulations they have examined, they are seeing that increasing moisture content near the surface is increasing CAPE, but surface temperature is actually decreasing, and is therefore not contributing to an increase in CAPE.
  • Jessica is looking for more cases. Are there particular cases of interest to WFOs that they should examine? Are there any morning/daytime cases?

2) Short discussion on future cool season HSLC events

Most of the discussion related to special soundings that NC State will be attempting this cool season and the potential for complimentary operationally driven soundings. The NC State folks desire some heads up about a potential case to make preparations. Initial thoughts are that this can be done through the CSTAR List Server which would allow some frank discussion among list server participants and not in the public realm like the blog.

The list server can be accessed at http://infolist.nws.noaa.gov/read/?forum=cstar_nc_state. If you haven’t signed up yet, please sign via with the instructions below.

To join the NC State CSTAR List Server via the web …
* go to http://infolist.nws.noaa.gov/read/all_forums/subscribe?name=cstar_nc_state
* enter the required information
– your email address
– your name
– a password
* click on “Subscribe”

3) Presentation on QLCS tornado warnings work in central region scheduled for the October call

On our October conference call, Jason Schaumann from NWS Springfield, MO will be providing a presentation on QLCS Tornado Warnings research that he and other colleagues in Central Region have been working on.

The initial research Operational Application of 0-3 Km Bulk Shear Vectors in Assessing QLCS  Mesovortex And Tornado Potential describes a three ingredients method for anticipating mesovortex genesis and rapid intensification. Two related webinars that were given to Central Region and a few Southern Region offices are available for viewing. The first presentation covers the three ingredients method while the second presentation covers radar and warning strategies.

4) Next conference call

Our next call is scheduled for Tuesday, September 22, 2015 at 11am.

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