EMC's Model Evaluation Group

 The Model Evaluation Group (MEG) community is established to interact with the user community on issues related to the forecast systems of NCEP's Environmental Modeling Center (EMC).    It is used to discuss overall model performance and provide feedback on operational and parallel versions of the models which comprise the production suite.

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Evaluation Period Completed

      One final post for the night, I promise......       The official evaluation period for the FV3GFS is now completed.   Centers and NWS Regional SSDs will get information soon, via the...

RE: Re: GFS FV3 #2 in August

    Warren-          Thanks for your post.     I'm attaching an image from the MEG tropical recap presentation given a few weeks ago.    The top panel is track error,...

Fwd: FV3/GFS Comparison: The Good and Bad: Two Case Reviews

      Two more cases from Rob Cox at CYS. Hello, This comparison will be...

Fwd: FV3/GFS Comparison: The Good and Bad: Two Case Reviews

      Two more cases from Rob Cox at CYS. Hello, This comparison will be...

Re: Good Results on a Frontal Timing

    hi Rob-            Ok, I had success posting this case.    I'll forward your other email to the list shortly.    I have no idea at all why your posts didn't go through, but I...

Fwd: Good Results on a Frontal Timing

    Posting on behalf of Rob Cox, the SOO at CYS.    His attempt to post didn't work for some reason, but he has an excellent example of FV3GFS improvement with a surge of...

Re: GFS FV3 #2 in August

Jeff, Great to see!  Interesting to note dramatic difference between GFS and FV3 re both intensity and path of Florence as it approaches the Carolinas (see attached figs). ...

small science change to FV3GFS

    hello-         A modest science change was made to the FV3GFS late last week to address an issue with tropical cyclone intensity being too weak.     This change to an advection scheme...

Intro to MEG Evaluation of FV3GFS Retrospective Cases

Hi all, For those who may have missed yesterday's MEG meeting, we discussed an overview of our plans for evaluating the FV3GFS retrospective cases. The covered information included a...

RE: Better handling of high-level Hurricane moisture outflow?

Hi Tim, Thanks for posting this case!  It's good to see that the FV3 performance was better overall here, and given it was consistently drier than the GFS for several runs, it...

Better handling of high-level Hurricane moisture outflow?

Here is something completely different.  For Fire Weather in the Intermountain West, it is often very subtle model differences that are VERY important.    When Fabio was decaying off the...

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