Haven't look at all posts, so sorry if this has been already mentioned
WTH is this thing that crosses SNE around late this evening on the RRFS? You can trace it back to WV.
Gravity wave? Notice it flips the S to IP over CoastalWx's area.
A strong gravity wave occurred from the Mid-Atlantic ti SNE on 1/4/1994.
Here is my summary I made long ago when I worked at WSI.
A major coastal storm was in progress across the Mid-Atlantic
states and northeastern U.S. Elkins, West Virginia recorded
6 inches of snow in one hour and Syracuse, New York had 5
inches of snow in a hour for two consecutive hours. Syracuse
measured 18 inches for the storm. Other big snowfall totals
included 20 inches at Renovo, Pennsylvania and 18.5 inches at
Tully, New York. As the storm passed off the New Jersey coast,
a gravity wave was induced near Allentown, Pennsylvania. The
barometric pressure plunged 22.4 millibars from 997.7 to 975.3
in just 45 minutes at Allentown, and then rebounded almost as
much in only 15 minutes. The gravity wave propagated
northeastward and produced similar pressure fluctuations in New
England. Boston, Massachusetts recorded a wind gust to 66 mph.