Public Information Statement
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NOUS41 KWBC 051810

Technical Implementation Notice 16-40
National Weather Service Headquarters Washington DC
210 PM EST Mon Dec 05 2016

To:  Subscribers:
    -NOAA Weather Wire Service
    -Emergency Managers Weather Information Network
    Other NWS Partners, Users and Employees

From:  David Myrick
  Office of Science and Technology Integration

Subject:  Earlier delivery times for HIRES Window and HREF
  products: Effective January 4, 2017

Effective Wednesday, January 4, 2017, beginning with the 1200
Coordinated Universal Time (UTC) run, the National Centers for
Environmental Prediction (NCEP) will start the High-Resolution
Window Forecast System (HIRESW) slightly earlier in the
production cycle, which will lead to HIRESW products becoming
available up to 20 minutes earlier than they are today.  The
change in data availability time applies uniformly to all
forecast ranges and products, but is domain dependent as

CONUS:20 minutes earlier
Hawaii: 12 minutes earlier
Guam:12 minutes earlier
Alaska: 20 minutes earlier
Puerto Rico: 12 minutes earlier

As the High-Resolution Ensemble Forecast (HREF) is triggered by
the completion of the HIRESW, the HREF products (CONUS only)
similarly will be available approximately 20 minutes earlier.

For comments or questions related to this change, please

     Matthew Pyle
     NCEP/EMC, Mesoscale Modeling Branch
     College Park, Maryland
     Phone: 301-683-3687
     Steven Earle
     NCEP Central Operations
     College Park, Maryland
     Phone: 301-683-3831

NWS National Technical Implementation Notices are online at: is the U.S. government's official web portal to all federal, state and local government web resources and services.