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Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR) Forum

CAPE analysis

Posted By: Geoff Manikin
Date: 26-April-04 1811Z

Since the implementation of 20 April, you may have noticed some bullseyes of high CAPE in the operational RUC analyses. These were often accompanied by unrealistic boundary-layer structure. We have traced the problem to the PBL-based assimilation of surface observations in the data assimilation and have decided to pull the changes to the analysis.

 The previous version of the analysis code was reintroduced to operations at 16Z today 26 April. All other model changes implemented on that date remain in the model.

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