NOUS41 KWBC 251401 AAA
PNSWSH
Technical Implementation Notice 10-61, Amended
National
Weather Service Headquarters
901 AM EST Fri Feb 25 2011
To:
Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
-NOAAPORT
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
-Addition
of a
-Changes
to the
-Addition
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.
Model
Changes:
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.
Domain
Changes:
The
Puerto Rico domain will be expanded by approximately 50% to provide full
coverage to Hispaniola. A new domain will be added to run over
00
UTC: East,
06
UTC: West,
12
UTC: East,
18
UTC:
These
runs may be cancelled by hurricane model runs during the tropical season.
New
Products:
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
Ventilation rate
Transport wind
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.
With
this implementation, NCEP will also correctly identify the updraft helicity field as being computed over the 5000 m to
Data
Availability:
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:
.../com/nam/prod/hiresw
To
.../com/hiresw/prod/hiresw
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:
http://www.emc.ncep.noaa.gov/mmb/mmbpll/nestpage_4km
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:
http://www.ftp.ncep.noaa.gov/data/nccf/com/hiresw/para
ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/hiresw/para
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:
Matthew
Pyle
NCEP/EMC,
Mesoscale Modeling Branch
301-763-8000
x 7242
Geoff DiMego
NCEP/EMC, Mesoscale Modeling Branch
301-763-8000
x 7221
For
questions regarding the dataflow aspects of these data sets, please contact:
Rebecca
Cosgrove
NCEP/NCO
Dataflow Team
301-763-8000
x7198
ncep.list.pmb-dataflow@noaa.gov
NWS
National Technical Implementation Notices are online at:
http://www.weather.gov/os/notif.htm
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