[ Read Responses | Return to the Index ]
[ Previous | Next in Thread | Next ]
Posted by Stan Benjamin on 27 May 98, 11:01 MT
As some of you are aware, the CAPE/CIN diagnostic in RUC2 is in need of some help, and help is on the way, thanks to work by John Brown and many discussions between him and Phillip Bothwell at SPC. A revised version, which can be conservatively described as a huge improvement, was implemented in the 40km MAPS running at FSL on Fri 16 May. This version has been submitted to the NCEP Computing Office as a change to RUC2 and will be implemented there within 1-2 weeks. Another post to this board will occur when the change is made.
The new version gives much smaller CIN, slightly smaller CAPE, and avoids unsightly and confusing "zero holes" in the middle of high CAPE areas. The old version performed fairly well in early spring but was found to have several problems, especially in the presence of deep mixed layers that have now become much more prevalent as the season has progressed. The difference in performance can be seen by comparing the real-time CAPE/CIN fields on the RUC/MAPS home page from MAPS40 (red button) and RUC2 (blue button).
Here is a summary of the new routine's steps:
Again, another post will be made when the RUC2 change is actually made.
The FSL RAP/HRRR/RUC Information Forum is maintained with a variant of WebBBS .