cae Posted March 9, 2018 Author Share Posted March 9, 2018 March 7, 2018. Below is the stage IV precipitation analysis (verification data) for the event. The color scale is the same as used for the model runs. Below are the 00z and 12z model runs up to the event. The Euro is top left, GFS is top right, GGEM is bottom left, and ICON is bottom right. This gif starts 84 hours before the last run. Before that there was a rain event, and weather.us doesn't have a way to distinguish between the precip totals. To get a better sense on how the models did in predicting snow, I plot the snow depth maps below. Snow depth is not a great metric because 1) Every model seems to calculate "snow depth" differently. (The Euro appears to use a more generous algorithm than the other models.) 2) There is something wrong with the snow depth maps for the GGEM on weather.us. It appears to ignore all depths below 2", which makes it look like the GGEM predicted no snow in areas where it predicted low snow depths. Unfortunately, it's the only metric of snowfall available for all four models on weather.us. The Euro is top left, GFS is top right, GGEM is bottom left, and ICON is bottom right. This gif starts 192 hours before the last run. For comparison with the above plots, here are the reported snowfall totals from LWX. Link to comment Share on other sites More sharing options...
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