Public Information Statement
Issued by NWS National HQ

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NOUS41 KWBC 281254
PNSWSH

Public Information Notice
National Weather Service Headquarters Washington DC
855 AM EDT Tue Jul 28 2015

To:        Subscribers:
           -Family of Services
           -NOAA Weather Wire Service
           -Emergency Managers Weather Information Network
           -NOAAPort
           Other NWS Partners and NWS Employees

From:      Heath Hockenberry
           Acting Chief, Severe, Fire, Public and Winter
             Services Branch

Subject:   Soliciting Comments through August 31, 2015, on Change to
           P-VTEC Line(s)and Associated Headline(s)when Upgrading from
           Winter Storm Warning or Lake Effect Snow Warning to Ice Storm
           and Blizzard Warning

NWS is accepting comments on changing some of the P-VTEC line(s) and
headlines in the Winter Weather Watches, Warnings and Advisories product
(WSW). The proposed change is summarized below:

When a Winter Storm Warning or Lake Effect Snow Warning is upgraded to an
Ice Storm or Blizzard Warning for the same geographical area, the WSW
segment will now contain only one headline and two P-VTEC lines. The
headline will list the new warning only. The first P-VTEC line will use
the UPG action code to show the old Winter Storm or Lake Effect Snow
Warning being upgraded. The second P-VTEC line will use the NEW action
code to start the new Ice Storm or Blizzard Warning.

This proposed change is expected to more accurately reflect and more
effectively relay automated communication of winter weather warning
information.

For example, under current policy, the following P-VTEC lines and
headlines are disseminated when a Winter Storm Warning is changed to an
Ice Storm Warning for the same geographical area:

/O.CAN.KOUN.WS.W.0005.000000T0000Z-010129T0000Z/ (P-VTEC line 1)
/O.NEW.KOUN.IS.W.0005.010128T1030Z-010129T0000Z/ (P-VTEC line 2)

...Winter Storm Warning is Cancelled...
...Ice Storm Warning in Effect Until 6pm CST Sunday...

Under the proposed change, the following P-VTEC lines and headline will be
disseminated when a Winter Storm Warning is upgraded to an Ice Storm
Warning for the same geographical area:

/O.UPG.KOUN.WS.W.0005.000000T0000Z-010129T0000Z/ (P-VTEC line 1)
/O.NEW.KOUN.IS.W.0005.010128T1030Z-010129T0000Z/ (P-VTEC line 2)

...Ice Storm Warning in Effect Until 6pm CST Sunday...

The example shown above would be identical when upgrading from a Winter
Storm Warning to a Blizzard Warning and when upgrading from a Lake Effect
Snow Warning to an Ice Storm or Blizzard Warning. No other changes are
being proposed to the WSW product at this time.

Please submit questions or comments to:

  David Soroka
  NWS Winter Weather Program Leader
  david.soroka@noaa.gov
  301-427-9346

National Weather Service Public Information Statements are online at:

  http://www.weather.gov/os/notif.htm

$$


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