TECHNICAL IMPLEMENTATION NOTICE ??-??
NATIONAL WEATHER SERVICE HEADQUARTERS
??? PM EDT ??? ??? ?? 2007
TO: FAMILY OF SERVICES /FOS/ SUBSCRIBERS...NOAA WEATHER
WIRE SERVICE /NWWS/ SUBSCRIBERS...EMERGENCY MANAGERS
WEATHER INFORMATION NETWORK /EMWIN/SUBSCRIBERS...
OTHER NATIONAL WEATHER SERVICE /NWS/ CUSTOMERS AND
PARTNERS...NWS EMPLOYEES
FROM: PAUL HIRSCHBERG
CHIEF...SCIENCE PLANS BRANCH
OFFICE OF SCIENCE AND TECHNOLOGY /OST/
SUBJECT: UPGRADE TO HIRES WINDOW /HIRESW/ MODEL
EFFECTIVE TUESDAY SEPTEMBER 11 2007...WITH THE 1200 COORDINATED UNIVERSAL TIME /UTC/ RUN...THE NATIONAL CENTERS FOR ENVIRONMENTAL PREDICTION /NCEP/ WILL UPGRADE THE ENVIRONEMENTAL MODELING CENTER /EMC/ HIRESW MODEL.
CURRENTLY…NCEP IS PRODUCING OPERATIONAL RUNS OF THE
WEATHER RESEARCH AND FORECAST /WRF/ VERSIONS OF THE NON-HYDROSTATIC HYBRID
VERTICAL COORDINATE MESOSCALE MODEL /NMM/ AND THE
UPCOMING CHANGES...THE CHANGES LISTED BELOW WILL BE INCORPORATED INTO THE MODEL ON THE EFFECTIVE CHANGE DATE.
THE
HIRESW WILL BE RUN AT FINER GRID SPACING USING UPDATED VERSIONS OF THE
CONSTITUENT FORECAST MODELS. THE GRID
SPACING OF THE HIRESW WILL CHANGE FROM 5.15 KM TO 4.0 KM FOR THE WRF VERSION OF
THE NMM AND FROM 5.8 KM TO 5.15 KM FOR THE ARW MODEL. ADDITIONALLY, BOTH MODELS
WILL BE UPGRADED FROM VERSION 1.3 TO VERSION 2.2 OF THE WRF SOFTWARE.
GRIB
OUTPUT PRODUCTS WILL CHANGE FROM 8 KM TO 5 KM GRID SPACING FOR ALL DOMAINS
OTHER THAN THE ALASKAN WINDOW…WHERE THE GRID SPACING WILL CHANGE FROM 10 KM TO
5 KM. THE REGIONS COVERED BY THE ALASKAN…WEST
AND EAST WINDOWS ARE SIGNIFICANTLY INCREASED.
THE CENTRAL WINDOW IS ELIMINATED, AS THIS REGION IS WELL COVERED BY THE
EXPANDED WEST AND EAST WINDOWS.
THE
REVISED RUN SCHEDULE FOR THE NEW FIVE WINDOW CONFIGURATION IS:
0000
UTC: EASTERN US AND
0600
UTC: WESTERN US AND
1200
UTC: EASTERN US AND
1800
UTC:
THE
INITIALIZATION PACKAGE IS CHANGED FROM THE WRF STANDARD INITIALIZATION /WRFSI/
TO THE WRF PREPROCESSING SYSTEM /WPS/.
IF
YOU HAVE ANY QUESTIONS CONCERNING THESE CHANGES...PLEASE CONTACT:
GEOFF
DIMEGO
NCEP...MESOSCALE
MODELING BRANCH
PHONE:
301 763 8000 X7221
EMAIL:
GEOFF.DIMEGO@NOAA.GOV
OR
MATTHEW
PYLE
NCEP...MESOSCALE
MODELING BRANCH
PHONE:
301 763 8000 X7242
EMAIL:
MATTHEW.PYLE@NOAA.GOV
OR
JOE
CARR
NCEP...PRODUCTION
MANAGEMENT BRANCH
PHONE:
301 763 8000 X7709
EMAIL:
JOE.CARR@NOAA.GOV
THIS
AND OTHER NWS TECHNICAL IMPLEMENTATION NOTICES ARE AVAILABLE ONLINE AT /USE
LOWER CASE LETTERS/: