Public Information Statement
Issued by NWS National HQ

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NOUS41 KWBC 151857

Public Information Statement PNS18-XX
National Weather Service Headquarters Silver Spring MD
257 PM EDT Thu Mar 15 2018

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

From:  Jeffrey Craven
  NWS Office of Science and Technology Integration
  Meteorological Development Laboratory

Subject:  Soliciting Comments on the Upgrade of Experimental
  National Blend of Models Guidance through
  June 27, 2018

The Statistical Modeling Branch (SMB) of the Meteorological
Development Laboratory (MDL) is proposing to update the National
Blend of Models (NBM) this summer.  The NWS is seeking comments
on this proposed upgrade through June 27, 2018. An SCN will be
issued at least 30 days prior to the implementation of this
upgraded product.

This upgrade will incorporate additional global and mesoscale
models over the CONUS, OCONUS, and Oceanic domains.  More
importantly though, this upgrade will enable the NBM to continue
to fill NWS Service Program gaps for several key weather
elements in the realm of aviation, fire weather, and marine
weather.  Additionally, MDL/SMB proposes to generate a first
generation NBM text bulletin suite similar to that of the Global
Forecast System (GFS)-based Model Output Statistics (MOS).  We
note though that the guidance in these bulletins will reflect
the value of the closest grid point to the station listed in the
bulletin and is not guidance developed at the station.It is
anticipated that these upgrades will benefit the NWS in its
mission towards better Impact Decision Support Services.

For those users with a NOAA email account, NBM GRIB2 files can
be downloaded from the following location:

Otherwise, GRIB2 data can be downloaded from:

CONUS Domain:

Alaska Domain:

Hawaii Domain:

Puerto Rico Domain:

Oceanic Domain:

Users may find parallel NBM V3.1 text bulletins at:

A more detailed discussion on the format and timing of the NBM
text bulletins can be found in its Product Description Document

All or a portion of the NBM text bulletins can be obtained by
visiting an interactive graphical user interface:

The NWS will evaluate all comments on this NBM upgrade including
the new NBM text bulletins to determine whether to proceed with
this upgrade.

Any questions, comments or requests regarding this
implementation should be directed to the contacts below. We will
review any feedback and decide whether to proceed.

For questions regarding the implementation of NBM guidance,
please contact:

 David Rudack
 MDL/Silver Spring, Maryland
 Jeff Craven
 MDL/Silver Spring, Maryland

A web page describing the NBM can be found at:

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