Data Generated on 20080130:

Category: Ensemble Forecasts

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Ensemble Forecasts:

'a' items: Sequence of 17 daily images of the NCEP ensemble mean (11-member average) 500 hPa geopotential heights (gph) and 850 hPa temperature. Images show values and standardized anomalies of the fields (relative to the 30yr, 1971-2000 climate). Northern Hemisphere images (NH) are low-frequency filtered fields ( 7-day averages). North American images (NA) are unfiltered fields. Animation runs 5 loops; Reload (or refresh) starts animation again.

's' items: Sequence of 17 daily images of the NCEP 11-member ensemble member spread 500 hPa geopotential heights (gph) and 850 hPa temperature. Left portion of images show 'spagetti' plots of 2 contours. The right portion of the plots provide information on the magnitude of the ensemble forecast uncertainty relative to the typical climatological variance of the particular field. Northern Hemisphere images (NH) are low-frequency filtered fields ( 7-day averages). North American images (NA) are unfiltered fields. Animation runs 5 loops; Reload (or refresh) starts animation again.