NOUS41 KWBC 121306 AAB
Technical Implementation Notice 14-31 Amended
National Weather Service Headquarters Washington DC
903 AM EDT Fri Sep 12 2014
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather Information Network
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
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:
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:
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
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:
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
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
NWS Technical Implementation Notices are online at: