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: