NOUS41 KWBC 121650



Service Change Notice 18-04

National Weather Service Headquarters Silver Spring MD

1150 AM EDT Fri Jan 12 2018


To:       Subscribers:

          ­NOAA Weather Wire Service

          ­Emergency Managers Weather Information Network


          Other NWS Partners, Users and Employees


From:     Dave Myrick

          NWS Office of Science and Technology Integration


Subject:  Correction to Global Forecast System (GFS) Model

          Station Time Series in the Binary Universal Form

          for Representation of Meteorological Data (BUFR)

          Output Effective January 10, 2018


Effective on January 10, 2018, beginning with the 1200

Coordinated Universal Time (UTC) run, the National Centers for

Environmental Prediction (NCEP) will correct an error in the

post-processing component of the hourly GFS station time series

precipitation amount of BUFR data.


It was found that hourly total and convective precipitation

amounts in the current operational GFS station time series BUFR

output are higher than what the model is actually generating at

stations. An error was found in the code, and the correction is

being implemented. Evaluations were carried out by NWS field

offices, and comparisons between the revised BUFR output and

model 2D precipitation maps show that the error is corrected in

the new version. The only changes are corrections to the total

and convective precipitation amounts, so no user actions are



Any questions, comments, or requests regarding this

implementation should be directed to the contacts below.


Vijay Tallapragada

NCEP/EMC Modeling and Data Assimilation Branch

College Park, MD



Jason Levit

NCEP/EMC Verification Post Processing Product Generation Branch

College Park, MD


For questions regarding the data flow aspects, please contact:


Carissa Klemmer

NCEP/NCO Dataflow Team Lead

College Park, MD



NWS Service Change Notices are online at: