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PNSWSH

 

Technical Implementation Notice 14-31 Amended

National Weather Service Headquarters Washington DC

903 AM EDT Fri Sep 12 2014

 

To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network

         -NOAAPORT

         Other NWS Partners and NWS Employees

 

From:    Tim McClung

         Science Plans Branch Chief

         Office of Science and Technology

 

Subject: Amended: Extra-Tropical Storm Surge (ETSS)

         Enhancements:  Effective October 14, 2014

 

Amended to reschedule the ETSS enhancements implementation

date to Tuesday, October 14, 2014

 

On Tuesday,October 14,2014,beginning with the 1200 Universal

Coordinated Time (UTC) cycle,the Extra-Tropical Storm Surge

(ETSS) model will use 0.5 degree instead of 1 degree gridded

wind input from the Global Forecast System model.Additionally,

ETSS will use a corrected mask for merging data over the 

Bering Sea.

 

Also on Tuesday,October 14,2014,ETSS will begin generating

2.5 km National Digital Forecast Database (NDFD) CONUS GRIB2

files and 3 km NDFD Alaska GRIB2 files.

 

For the NWS FTP server the 2.5 km CONUS products will be

available in the National Digital Guidance Database (NDGD) here:

 

http://weather.noaa.gov/pub/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.slosh/AR.conus/ds.etss-2p5.bin

 

The 5 km CONUS products: grib2.mdlsurgegrid.00con,grib2

.mdlsurgegrid.06con,grib2.mdlsurgegrid.12con and grib2

.mdlsurgegrid.18con in that directory will be discontinued.

 

The 3 km Alaska products will be available here:

 

http://weather.noaa.gov/pub/SL.us008001/ST.expr/DF.gr2/DC.ndgd/GT.slosh/AR.alaska/ds.etss-3p0.bin

 

The 6 km Alaska products: grib2.mdlsurgegrid.00ala,grib2

.mdlsurgegrid.06ala,grib2.mdlsurgegrid.12ala and grib2

.mdlsurgegrid.18ala in that directory will be discontinued.

 

For the NCEP FTP server the new products will be available

here:

 

ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.YYYYMMDDHH/

 

where YYYY is the current year,MM is the current month,DD is

the current day,and HH is the current hour.  They will have

names of: grib2.mdlsurgegrid.2.5km.HHcon for CONUS and grib2

.mdlsurgegrid.3km.HHala for Alaska.

 

The new products are already available in parallel here:

 

ftp://ftp.ncep.noaa.gov/pub/data/nccf/com/gfs/para/gfs.YYYYMMDDHH/

 

The 5 km CONUS product (grib2.mdlsurgegrid.HHcon) and the 6 km

Alaska product (grib2.mdlsurgegrid.HHala) will be discontinued.

 

For the Satellite Broadcast Network and NOAAPORT both the

original and new products will be available.  The new products

will have WMO headers of:

 

     WMO Heading         Region

 

     MHU...KNHC         NDFD CONUS 2.5 km grid

     MHR...KNHC         NDFD Alaska 3 km grid

 

The "..." in the WMO heading will be replaced by DHH where

D is the day of the forecast. 

A=Day 0,B=Day 1,...,F

=Day 5 and HH is the hour of day when the forecast is valid. 

A full chart of the header combinations per forecast cycle is

available here:

 

   http://www.nws.noaa.gov/mdl/etsurge/docs/headers2.xls

 

Once AWIPS is ready,the old products with WMO heading of

"LHU...KNHC" and "LHR...KNHC" will be discontinued.

 

If you have any questions about these changes and additions

to the Extra-Tropical Storm Surge guidance,please contact:

 

     Arthur Taylor or Huiqing Liu

     Meteorological Development Laboratory

     Phone: 301-713-1613 X163,301-713-1613 X162

     E-Mail: arthur.taylor@noaa.gov or Huiqing.Liu@noaa.gov

 

NWS Technical Implementation Notices are online at:

 

   http://www.nws.noaa.gov/om/notif.htm

 

$$