First set of 12: RMS height error for 5-day forecasts at 500 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 height error. Average values for each cycle over the period are indicated by horizontal lines and numbers at top. Updated ~monthly.







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