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January Storm Term Threat Discussions (Day 3 - Day 7)


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10 minutes ago, Ralph Wiggum said:

Fringed 

Typical model error. You know how this works. There is never that slow gradual tapering like that. The guidance never sees that enhanced lift area on the north fringe banked up against the confluence to the north.  Happens time and again. If this run was correct wrt surface and h5 track and intensity this would be the real result.  Somewhere near that red like would be a sharp cutoff with south of that line getting more then what is depicted there and closer to the Max down in VA.   
BA13656D-0E34-477B-A3AF-D9C77573B97C.jpeg.467baa8a780624f9288775c98b04a06c.jpeg

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3 minutes ago, psuhoffman said:

Typical model error. You know how this works. There is never that slow gradual tapering like that. The guidance never sees that enhanced lift area on the north fringe banked up against the confluence to the north.  Happens time and again. If this run was correct wrt surface and h5 track and intensity this would be the real result.  Somewhere near that red like would be a sharp cutoff with south of that line getting more then what is depicted there and closer to the Max down in VA.   
BA13656D-0E34-477B-A3AF-D9C77573B97C.jpeg.467baa8a780624f9288775c98b04a06c.jpeg

Geez u couldn't draw the red line 7 miles farther N for me? :D

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@Ralph Wiggum dug this up...that gfs track and intensity was pretty identical to a previous storm with similar strong blocking. This doesn’t have the same upside because it’s moving faster and doesn’t have the same stj juice but this gives an idea of what the precip representation for a storm of that amplitude and that track should look like.  

5E674E06-85A0-435E-97DE-769FFE3FB0EA.gif.f138a48c85e91254c0d329578698f69c.gif
9DAB9589-026A-4D6F-B1C7-7440003A502F.jpeg.1f7884b523dc2e82a738b07150abdbfd.jpeg
4EF4D8A6-0DEB-433B-BFC2-1948EA55331F.gif.656817089a98631678e49b99eb5f17b0.gif

7F7F4A4D-80AC-4B90-B653-2783E9B5F829.jpeg.df978b60639f625c7cdb8bca2b089b36.jpeg

 

Some differences. The primary was a little stronger to the west initially and after that point above the Feb 2010 storm gained SLIGHTY more latitude but by then it was occluding and the precip was sinking southeast anyways. I would obviously scale back the qpf a lot here and I would shift the northern fringe south maybe 20 miles. But just saying if that gfs track and intensity was correct the results into southern PA would be a lot better. But there would be a brick wall somewhere not far north of Philly. 


 

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