Service Change Notice 12-07

National Weather Service Headquarters Washington DC

1050 AM EST Fri Feb 10 2012


TO:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS partners and NWS employees


FROM:    James E. Hoke

         Director, Hydrometeorological Prediction Center


SUBJECT: Transition of NCEP HPC Probabilistic Winter

         Precipitation Forecasts for Days 1 -3 From

         Experimental to Operational Effective March 13, 2012

         For CONUS Only


Effective Tuesday, March 13, 2012, at 1200 Coordinated Universal Time (UTC), the National Centers for Environmental Prediction’s (NCEP) Hydrometeorological Prediction Center (HPC) will issue Probabilistic Winter Precipitation Forecasts for Days 1-3 on an operational basis for the contiguous United States (CONUS) only.


The graphical products are online at:


GRIdded Binary version 2 (GRIB2) data is online at:


Detail regarding this product is in the Product Description Document (PDD) online at:


These products have been issued experimentally since March 2011:


If you have questions or feedback, please contact:

 301-763-8000 Ext 7425


National Service Change Notices are online at: