Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR) Forum
Posted By: Bill Moninger In Response To: GFS (Scott Dennstaedt)
Date: 10-August-07 2118Z
In Response To: GFS (Scott Dennstaedt)
Hello Scott (and others),
yes, all four GFS cycles are available (00Z, 06Z, 12Z and 18Z) at http://rucsoundings.noaa.gov/.
You saw a value of 0 for CAPE because we weren't reading that value from the GFS file. We've corrected that and now show CAPE and CIn for the GFS. Based on the discussion I found at http://www.wdtb.noaa.gov/Courses/dloc/svrparams/svrparams.htm and information in the grib files, these are apparently the values based on the highest theta-E from the boundary layer (the lowest 180 mb above the surface), i.e., "MUCAPE" and the corresponding Cin.
Of the thermodynamic indices shown on the plot, only CAPE and CIN (and Helicity and Precipitable water if available) come from the model output. The other values are calculated by the display software.
Also, we've decreased the time to plot GFS analysis soundings by about a factor of 2. (There's no change in the time to plot forecast soundings). Each sounding now takes about 20 seconds to plot, but this depends on the load on our web server.
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