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NOUS41 KWBC 184055 PNSWSH Technical Implementation Notice 12-50 National Weather Service Headquarters
Washington DC 1055 AM EDT Thu Oct 18 2012 To:
Subscribers:
- Family of Services
- NOAA Weather Wire Service
- Emergency Managers Weather
Information Network
- NOAAPORT
Other NWS Partners and NWS employees From:
Eli Jacks
Chief, Fire and Public Weather Services Branch Subject:
Two Operational Fire Weather Elements to be
Added to the National Digital Forecast Database for
the United States, including Alaska, Hawaii, Guam and
Puerto Rico, Effective November 27, 2012 Effective Tuesday, November 27, 2012, at 1400
Coordinated Universal Time (UTC), the National Digital Forecast Database
(NDFD) will add Daily Maximum and Minimum Relative Humidity (RH)
operationally to for the United States, CONUS and OCONUS, including Alaska,
Hawaii, Guam and Puerto Rico. These elements are generated from computation
of the existing hourly dew point and hourly temperature grids. These two fire weather elements will be
in the NDFD for the valid times shown: - Maximum Relative Humidity (Days 1-7) - Minimum Relative Humidity (Days 1-7) More details regarding these elements are
available in the Product Description Document (PDD) in the online catalog of
NWS products and services. With this implementation, these forecasts
will be available from NDFD in the standard methods: - GRidded
Binary version 2 (GRIB2) files via Hypertext Transfer
Protocol (HTTP) and File Transfer Protocol (FTP) - eXtensible
Markup Language (XML) via Simple Object Access Protocol
(SOAP) - Graphics via Web browser: http://graphical.weather.gov/
Users who pull NDFD elements in GRIB2
format, either via the internet or via the Family of Services server access
service, may need to update their procedures and scripts in order to access
these elements. The GRIB2 files are online at: ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/
and http://weather.noaa.gov/pub/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/
Partners and users who use the NDFD in
XML via Web service or the online graphical NDFD images can use the same
methods they currently use to acquire these elements. More information about accessing and
using NDFD elements is online at: http://ndfd.weather.gov/technical.htm
If November 27, 2012, is declared a
critical weather day, this implementation may be postponed. In that case,
users will be notified of that decision via an updated Technical
Implementation Notice as far in advance as possible. For questions regarding these products,
please contact:
Heath Hockenberry
National Fire Weather Program Manager
NOAA/NWS Office of Climate, Water and Weather Services
Boise, ID For general questions regarding NDFD
data, please email: For technical questions regarding NDFD
data, please contact:
David Ruth
Mesoscale Prediction Branch Chief
NOAA/NWS Office of Science and Technology
Silver Spring, Maryland For questions regarding this notice,
please contact:
Robyn Heffernan Fire
Weather Science and Dissemination Meteorologist
NOAA/NWS Office of Climate, Water and Weather Services
Boise, ID Technical Implementation Notices
specifically related to NDFD are online at: http://www.weather.gov/ndfd/tins.htm
National Technical Implementation Notices
are online at: http://www.weather.gov/os/notif.htm
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