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GFS 900mb 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 06Z 384
GFS-HR 06Z 384
NAM 06Z 084
RAP 11Z 021
ECMWF 00Z 240
GEFS 06Z 384
CMC 00Z 240
ECMEPS 00Z 240

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2019-01-21: Added anomaly maps.