Analysis and Comments on a March 1998 Wedge Event

PC-GRIDDS is a great tool for looking at sub-synoptic fields below 850mb. The higher resolution Eta model provides a better representation of mesoscale features in mountainous regions, including precipitation resulting from orographic processes. The analysis and forecast gridded data fields below show how the Eta model did a much better job at depicting the low level wedge. The Eta 1000 mb wind field shows a mostly parallel flow along the eastern slopes of the Appalachians, while the NGM model shows winds flowing more normal to the mountains.

 

Analysis of 1000 mb Eta potential<br> temperature/wind field valid at 00 UTC, March 17th.
Analysis of 1000 mb Eta potential
temperature/wind field
valid at 00 UTC, March 17th.
Analysis of 1000 mb NGM potential<br> temperature/wind field valid at 00 UTC, March 17th.
Analysis of 1000 mb NGM potential
temperature/wind field
valid at 00 UTC, March 17th.
48hr forecast of 1000 mb Eta potential temperature/wind field<br>valid at 00 UTC, March 17th.
48hr forecast of 1000 mb Eta potential
temperature/wind field
valid at 00 UTC, March 17th.
48hr forecast of 1000 mb NGM potential<br> temperature/wind field valid at 00 UTC, March 17th.
48hr forecast of 1000 mb NGM potential
temperature/wind field
valid at 00 UTC, March 17th.

 


 

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