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

HRRR/RAP wind gust change - 2 Nov 2016

Posted By: Stan Benjamin
Date: 3-November-16 1459Z

A change was made in the wind gust diagnostic calculation for the operational RAP and HRRR yesterday (2 Nov 2016) starting with the 14z run. This change reverted to use of a theta-v profile PBL depth for the wind gust diagnostic instead of using an alternative hybrid PBL-depth. Use of the hybrid PBL was resulting in too-strong wind gust fields at nighttime. More information is available in http://ruc.noaa.gov/rr/RAP_var_diagnosis.html#gust

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