NOUS41 KWBC 132000
PNSWSH
Technical
Implementation Notice 12-13
National Weather
Service Headquarters Washington DC
400 PM EDT Tue
Mar 13 2012
To: Subscribers:
-Family of Services
-NOAA Weather Wire Service
-Emergency Managers Weather
Information Network
-NOAAPORT
Other NWS partners and NWS employees
From: Richard J. Vogt
Director, WSR-88D Radar Operations
Center
Subject: More
Frequent Products from Select FAA Terminal Doppler
Weather Radars During
Hazardous Weather Effective
April 12, 2012
Effective April
12, 2012, at approximately 1500 Coordinated
Universal Time
(UTC), the NWS will begin more frequent
dissemination of radar products generated by the NWS
Supplemental
Product Generator (SPG) from select FAA Terminal
Doppler Weather
Radars (TDWR) during hazardous weather. These
products will be provided via the NWS Radar Product
Central Data
Collection
Dissemination Service (RPCCDS) and NOAAPort.
When certain
thresholds of precipitation are met, the TDWR goes
into hazardous weather mode, also known as Volume
Coverage
Pattern
80 (VCP 80). While the
TDWR is in hazardous weather mode,
the short-range lowest elevation scan is
repeated every minute.
In addition, most
of the other short-range elevation scans and
volume products are repeated every 3 minutes.
Beginning April
12, 2012, the lowest elevation scan reflectivity
and velocity products (Table 2) and other
short-range products
(Table 3) will be
provided on the RPCCDS and NOAAPort every
minute and every 3 minutes, respectively, from the
11 TDWRs
listed in Table 1 below. Since the products (Table
2 and 3) are
just more frequent issuances of currently
available products, no
new WMO Headers, AWIPS IDs or FTP directories
are needed.
Table 1: Participating TDWR Sites
Associated
WFO TDWR ID TDWR FAA SITE NAME
-------------- -------
------------------
KFWD TDAL DALLAS LOVE FIELD (DAL)
KFWD TDFW DALLAS/FT. WORTH (DFW)
KGSP TCLT CHARLOTTE (CLT)
KILN TCMH COLUMBUS OH (CMH)
KILN TCVG COVINGTON (CVG)
KILN TDAY DAYTON (DAY)
KLOT TMDW CHICAGO MIDWAY (MDW)
KLOT TORD CHICAGO O'HARE (ORD)
KMKX TMKE MILWAUKEE (MKE)
KOKX TEWR NEWARK (EWR)
KOKX TJFK NEW YORK CITY (JFK)
Table 2: Two
Example TDWR Products That Will be Repeated Every
Minute in
Hazardous Weather Mode (VCP 80)
WMO Header AWIPS ID
Product ID Product Name
---------- --------
---------- ------------
SDUS55 KFWD TR0DAL
181 REFLECTIVITY (Z) -
BASE
ELEVATION
SDUS55 KFWD TV0DAL
182 VELOCITY (V) - BASE
ELEVATION
Table 3: Nine
Example Products That Will be Repeated Every 3
Minutes in
Hazardous Weather Mode (VCP 80)
WMO Header AWIPS ID
Product ID Product Name
---------- --------
---------- ------------
SDUS25 KFWD TR2DAL
181 REFLECTIVITY (Z) -
THIRD
ELEVATION
SDUS75 KFWD TV2DAL
182 VELOCITY (V) - THIRD
ELEVATION
SDUS55 KFWD NCRDAL
37 COMPOSITE
REFLECTIVITY
(CZ)
SDUS75 KFWD NETDAL
41 ECHO TOPS (ET)
SDUS55 KFWD NVLDAL
57 VERTICALLY INTEGRATED
LIQUID
(VIL)
SDUS35 KFWD NSTDAL
58 STORM TRACKING
INFORMATION (STI)
SDUS65 KFWD NHIDAL
59 HAIL INDEX (HI)
SDUS65 KFWD NTVDAL
61 TORNADIC VORTEX
SIGNATURE (TVS)
SDUS35 KFWD NMDDAL
141 MESOCYCLONE (MD)
The three letter
associated WFO ID and the last three letters of
the TDWR ID will take the place of
"FWD" in the WMO Header and
"DAL"
in the AWIPS ID, respectively, for actual products as
needed.
Currently, the
communications throughput for a single site
ranges from 4 to 17 kilo-bits per second (kbps).
This change
will increase that by a factor of 2.5, which
would raise the
maximum loading to 42 kbps.
As with other
centrally collected TDWR products, the additional
products will be archived at the National Climatic
Data Center
(NCDC). The inventory of the archived products will
be contained
along with other TDWR products under the NEXRAD
Level III tab
at:
http://hurricane.ncdc.noaa.gov/pls/plhas/has.dsselect
More information about
how the NWS generates products from FAA’s
TDWR data can be
found at:
If you have any
questions about the technical content or
generation of these products, please contact:
Michael Istok
NWS Office of Science and Technology
or
Tim Crum
WSR-88D Radar Operations Center
If you have
questions about the NOAAPort activation of these
products, please contact:
Brian Gockel
NWS Office of Science and Technology
National
Technical Implementation Notices are online at:
http://www.weather.gov/os/notif.htm
$$