NOUS41 KWBC 281322
CCA
PNSWSH
Technical
Implementation Notice 12-50: Corrected
National Weather
Service Headquarters Washington DC
822 AM EST Wed
Nov 28 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: Corrected: Two Operational Fire Weather
Elements to be
Added to the National Digital
Forecast Database for
the United
States, including Hawaii, Guam and
Puerto Rico, Effective November 27,
2012
Corrected
to remove the reference to Alaska Region (AR). The AR
Daily
Maximum/Minimum Relative Humidity elements in the National
Digital Forecast
Database will remain experimental until further
notice.
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 for the United States, CONUS and OCONUS,
including
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
$$