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Monthly Vector Wind Anomaly and Speed
LATEST MONTH 250 hPa
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LATEST MONTH 925 hPa

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Data:  NCEP reanalysis monthly wind components (250 and 925 hPa) on a 2.5 x 2.5 deg. lat/lon grid.
Base Period:  1971-2000
Data Source:  NCEP

Description:
The plot indicates the vector anomaly in the monthly wind field at 250 (top) and 925 hPa (bottom).   Shading and contours indicate the speed (in m/s) of the anomalous wind vector.  Contour interval for anomalies is 3 m/s with shading starting at 3 m/s.  NCEP is an acronym for the National Centers for Environmental Prediction, US.