A Blizzard, or Nothing…

Here’s a fun little graphic courtesy of the Penn State E-wall  The chart below is the total liquid-equivalent precipitation for the upcoming weekend from all of the different short-range ensemble forecast models that were run at 15z (10 am, EST).  Each panel represents a different model run, and the color scale – given on the lower right-hand side – is hundredths of inches.  We use these to establish 1) what the envelope of uncertainty is; 2) how much agreement there is amongst the models; and 3) which direction the guidance is leaning.  Well, this latest set of model data has everything from a blizzard… to nothing.  That should help straighten this out!

This image depicts the total precipitation (liquid equivalent) forecast from the latest set of short-range ensembles for the upcoming weekend.  The colors have been modified slightly from their original form.  The scale is in the lower right, and is in hundreds of inches, so: 10 = 0.10" (or ~ 1-2" of snow); 25 = 0.25" (or 2-3" of snow); 100 = 1.00" (or ~ 10" of snow); etc.  This map is courtesy of the PSU E-wall (http://www.meteo.psu.edu/~fxg1/ewall.html)

This image depicts the total precipitation (liquid equivalent) forecast from the latest set of short-range ensembles for the upcoming weekend. The colors have been modified slightly from their original form. The scale is in the lower right, and is in hundreds of inches, so: 10 = 0.10″ (or ~ 1-2″ of snow); 25 = 0.25″ (or 2-3″ of snow); 100 = 1.00″ (or ~ 10″ of snow); etc. This map is courtesy of the PSU E-wall (http://www.meteo.psu.edu/~fxg1/ewall.html)


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