NOUS41 KWBC 071612



Technical Implementation Notice 14-08

National Weather Service Headquarters Washington DC

1115 AM EST Fri Feb 7 2014


To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS partners and employees


From:    Cynthia Abelman

         Chief, Aviation Services Branch


Subject: Earlier Issuance of WAFS GRIB2 Forecasts for Cb,

         Icing and Turbulence


Effective Wednesday, March 12, 2014 at 1200 Coordinated Universal

Time (UTC), the NWS World Area Forecast Center (WAFC) grids for

Cb, Turbulence and Icing will become available at 4 hours, 35

minutes past the model initialization time. For example, the 00

UTC grids will be available at 0435 UTC. 


These gridded products are produced 4 times daily for T+06 to

T+36 hour time steps and are available in GRIB2 formats on the

WAFS Internet File System (WIFS) and the NCEP ftp server. They

were previously available at 5 hours past the model

initialization time. 


If you have any questions about this change, please contact:


Matt Strahan

Chief, International Operations Branch

Aviation Weather Center/WAFC Washington

Kansas City, MO 64153



National Technical Implementation Notices are online at: