Service Change Notice 11-03

National Weather Service Headquarters Washington DC

720 AM EST Wed Jan 26 2011


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 HPC Probabilistic Freezing Temperature
          Charts from Experimental to Operational Effective
          March 1, 2011

Effective Tuesday, March 1, 2011, the National Centers for Environmental Prediction’s (NCEP) Hydrometeorological Prediction Center (HPC) will transition the HPC Probabilistic Freezing Temperature charts to operational status.  These charts depict the probability of minimum near surface temperatures falling to 32 degrees Fahrenheit or less at 6 hour forecast intervals out through 156 hours. These products are derived from the National Digital Forecast Database (NDFD) temperature forecasts and the 2-meter temperature grid spread from the Global Forecast System (GFS) ensemble.


The products are available online at:


For more information, please contact:


    Ed Danaher

    Chief, HPC Development and Training Branch

    5400 Auth Road

    Camp Springs , MD 20746

    (301) 763-8000, ext. 7354


National Service Change Notices are online at: