NOUS41 KWBC 261415 AAB



Public Information Statement PNS15 Updated

National Weather Service Headquarters Washington DC

215 PM EDT Thu Oct 26 2017      


TO:      Subscribers:

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS Partners and NWS Employees


FROM:    Michelle Hawkins, Chief

         Severe, Fire, Public, and Winter Weather

           Services Branch


SUBJECT: Updated: Comment Period extended through April 30,

         2018, on the Experimental Lake Effect Snow (LES)

         Warning Polygons from Weather Forecast Office (WFO)

         Buffalo, NY


Updated to extend the comment period through April 30, 2018


WFO Buffalo, NY, will produce experimental LES polygon warnings

around Lakes Erie and Ontario. The experiment adds latitude/

longitude coordinates to segments of the Winter Weather Message

text product (BUFWSWBUF) and provides increased specificity with

polygons issued for sub-county areas.


These coordinates will be added to products containing the LES

Warning Valid Time Event code (LE.W) for certain zones in

western and north central New York along Lake Erie and Lake

Ontario. WFO Buffalo will began issuing the experimental product

with the coordinates on or about Friday, December 1, 2017.


When a LES Warning is in effect for these areas, WFO Buffalo

will also produce a graphic displaying these polygons at:


Geographic Information Systems (GIS) users will be able to use

these coordinates to plot areas most prone to heavy LES. WFO

Buffalo will also provide a downloadable file of the geographic

data on its website at:


The purpose of these polygons is to display small areas of

intense snowfall with low visibility at sub-zone levels in

upstate New York where the highest impacts to transportation and

commerce are expected.


Coordinates and polygons are only for experimental use. NWS

Buffalo will continue to issue operational zone-based LES

warnings for these areas.


The following WFO Buffalo Public Zones will be included in this



Zone Number                 Zone Name

-----------                 ---------

NYZ001                      Niagara

NYZ002                      Orleans

NYZ003                      Monroe

NYZ004                      Wayne

NYZ005                      Northern Cayuga

NYZ006                      Oswego

NYZ007                      Jefferson

NYZ008                      Lewis

NYZ010                      Northern Erie

NYZ011                      Genesee

NYZ012                      Wyoming

NYZ013                      Livingston

NYZ014                      Ontario

NYZ019                      Chautauqua

NYZ020                      Cattaraugus

NYZ021                      Allegany

NYZ085                      Southern Erie


The feedback gathered from this experiment will help us provide

more precise watches and warnings in the future and will support

a decision on whether to make these warning polygons



You can find more information on the experimental LES warning

polygons at the link below:


Please submit comments from December 1, 2017, through April 30,

2018, via the short survey linked below:


If you have questions, please contact:


John Guiney

NWS Eastern Region Headquarters

Bohemia, NY 11716-2618



Phone:  631-244-0121


Judith Levan

Meteorologist in Charge

NWS WFO Buffalo

Buffalo, NY 14225


Phone:  716-565-0204 x223


National NWS Public Information Statements are online at: