NOUS41 KWBC 251401 AAA
Technical Implementation Notice 10-61, Amended
Weather Service Headquarters
901 AM EST Fri Feb 25 2011
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
Other NWS Partners, Users and Employees
From: Timothy McClung
Science Plans Branch Chief
Office of Science and Technology
Subject: Amended: Upgrade to HIRES Window:
Effective March 29, 2011
Amended to postpone the effective date of changes to the HIRES Window from March 1 to March 29, 2011, and to correct the updraft helicity surface label.
Effective March 29, 2011, beginning with the 1200 Coordinated
Universal Time (UTC) run, the National Centers for Environmental
Prediction (NCEP) will upgrade the High-Resolution Window Forecast System (HIRESW). The upgrade includes:
-Changes to the model components
of new products and a new output grid for
-Change to the directory location on the NCEP server
These changes will not be implemented on NOAAPORT or the Advanced Weather Interactive Processing System (AWIPS) at this time. A separate TIN will be issued for the future activation of the HIRESW changes on AWIPS and NOAAPort.
The HIRESW model will be updated from Weather Research and Forecasting (WRF) version 2.2 code to WRF version 3.2 code for both the Advanced Research WRF (ARW) and the Nonhydrostatic Mesoscale Model (NMM) members of the system. Both the ARW and NMM models will use better conserving moisture advection after this upgrade.
Puerto Rico domain will be expanded by approximately 50% to provide full
coverage to Hispaniola. A new domain will be added to run over
These runs may be cancelled by hurricane model runs during the tropical season.
BUFR-formatted point forecasts for select locations will become available with this implementation.
The new gridded output fields that will become available for all domains are:
Echo top height from simulated radar reflectivity
Planetary Boundary Layer height (
Hourly max updraft helicity
Hourly max updraft speed
Hourly max downdraft speed
Hourly max 10 m above ground level (AGL) wind speed
Hourly max 1000 m AGL simulated radar reflectivity
Hourly max/min 2 m AGL temperature
Hourly max/min 2 m AGL relative humidity
80 m AGL wind, temperature, moisture, and pressure
In addition, NCEP will generate a set of new high-resolution, hybrid ensemble output that combines uncertainty information from the Short Range Ensemble Forecast (SREF) with deterministic forecasts from the HIRES. Output products from this HIRES ensemble will include mean, spread, and probabilistic guidance.
this implementation, NCEP will also correctly identify the updraft helicity field as being computed over the 5000 m to
The HIRESW data is currently available on the NWS FTP server, the NCEP server, and in NOMADS. The directory name of the location of the HIRESW output on the NCEP server and in NOMADS will change from:
The location of the data on the NWS FTP server will not change.
Product delivery timing of the HIRESW products is not expected to change as a result of this implementation. More information regarding the HIRESW and associated products can be found at:
A consistent parallel feed of data will become available on the
NCEP server once the model is running in parallel on the NCEP
Central Computing System by mid-January. The parallel data will
be available via the following URLs:
NCEP encourages all users to ensure their decoders are flexible and are able to adequately handle changes in content order, changes in the scaling factor component within the product definition section (PDS) of the GRIB files, and also any volume changes which may be forthcoming. These elements may change with future NCEP model implementations. NCEP will make every attempt
to alert users to these changes prior to any implementations.
For questions regarding these changes, please contact:
NCEP/EMC, Mesoscale Modeling Branch
301-763-8000 x 7242
NCEP/EMC, Mesoscale Modeling Branch
301-763-8000 x 7221
For questions regarding the dataflow aspects of these data sets, please contact:
NCEP/NCO Dataflow Team
NWS National Technical Implementation Notices are online at: