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First set of 12: Standard deviation of vector wind errors for 3-day forecasts at 850 hPa for the four GFS cycles, verifying in six regions of the Northern Hemisphere(top) and six other regions (middle) and whole hemispheres (bottom) during the last month. Second set of 12: Same, but for mean speed error. Average values for each cycle over the period are indicated by horizontal lines and numbers at top. Updated ~monthly.

------------------- Speed errors---------------------------