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NAM 850mb Absolute Vorticity Map Unavailable
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About This Map

Absolute vorticity is the strength of rotation present at a given moment. Positive values represent counterclockwise rotation, and negative values represent clockwise rotation. Highly positive values often represent storm systems. On our weather maps, absolute vorticity is given in units of .00001 hertz.

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Map Status


Model Run Hour
GFS 12Z 087
GFS-HR 12Z 081
NAM 12Z 084
RAP 15Z 014
ECMWF 12Z 240
GEFS 12Z 018
CMC 12Z 018

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