[gradsusr] MSL Pressure Chart

[Mike Manning]

Hi all,

I’ve got a question regarding the MSL Pressure for GFS - I’ve noticed that when using the mfhilo function in Grads and PRMSLmsl, I get the following (using TC Gita 09p as an example here):

mfhilo CL method N: 2  maxmin: -1   radinf:  1000.0 [nm]   cintinf:   300.0  latc: -18.00 lonc:  158.00
L   -25.16  165.89  M:    980.665  D:  756.16

However when I use MSLETmsl it is far more accurate:

mfhilo CL method N: 3  maxmin: -1   radinf:  1000.0 [nm]   cintinf:   300.0  latc: -18.00 lonc:  158.00
L   -25.15  165.90  M:    954.212  D:  1020.26

My question is this: Is this expected behaviour from PRMSLmsl, because a few other models such as CMC for example do not include MSLetmsl and only PRMSLmsl and I want to display the lowest central pressures on low pressure systems.  

Cheers, Mike
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