NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
NOTE: The nws-changes mailing list is no longer active. The list archives are made available for historical reasons.
-------- Original Message -------- 521 NOUS42 KWNO 032115 ADMNFD SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE NWS NCEP CENTRAL OPERATIONS CAMP SPRINGS MD 2113Z WED AUG 03 2011 A CHANGE TO THE HWRF MODEL SAS DEEP CONVECTION PARAMETERIZATION SCHEME WAS IMPLEMENTED AS OF THE 18Z WED AUG 3 2011 CYCLE TO CORRECT AN OUT-OF-BOUND ARRAY PROBLEM AND TO PREVENT RELATED MODEL FAILURES. TESTING AND EVALUATION FROM THE 2010 AND 2011 SEASONS SHOWED THIS CHANGE ALSO RESULTED IN: 1. A LARGE REDUCTION IN NORTHWARD BIAS OFTEN SEEN IN EASTERN PACIFIC HURRICANE TRACKS. 2. A 35 PERCENT IMPROVEMENT IN HURRICANE TRACK FORECAST ERRORS AND A 20 PERCENT IMPROVEMENT IN INTENSITY FORECASTS. $$ HANDEL/SDM/NCO/NCEP
nws-changes archives: