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:

 

 http://www.roc.noaa.gov/spg/

 

If you have any questions about the technical content or

generation of these products, please contact:

 

   Michael Istok

   NWS Office of Science and Technology

   michael.istok@noaa.gov

or

   Tim Crum

   WSR-88D Radar Operations Center

   tim.d.crum@noaa.gov

 

If you have questions about the NOAAPort activation of these

products, please contact:

 

   Brian Gockel

   NWS Office of Science and Technology

   brian.gockel@noaa.gov

 

National Technical Implementation Notices are online at:

 

  http://www.weather.gov/os/notif.htm

 

$$