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Public Information Statement

Statement as of 9:00 AM EDT on September 22, 2014


To: family of services /fos/ subscribers... NOAA weather
          wire service /nwws/ customers... other National Weather
          Service /NWS/ customers... NWS employees

From: Bill sammler
          warning coordination meteorologist... NWS Wakefield

Subject: changes to Wind Chill Advisory and warning criteria
          for NWS Wakefield area of responsibility effective
          December 1 2014

Beginning Monday December 1 2014... the criteria by which NWS
Wakefield issues wind chill advisories and warnings will change for
the portion of its area of responsibility in Virginia and the lower
Maryland Eastern Shore. The current criteria are 5 degrees below
zero for advisories... and 20 degrees below zero for wind chill
warnings. On December 1st... those criteria will be raised 5 degrees
to zero and minus 15 degrees respectively. Analysis of hourly wind
chill values since 1973 indicates the current advisory and warning
criteria... established in 2001 when a new wind chill calculation
scheme was implemented... are too low. The new values are more
representative of those used prior to the 2001 change in the wind
chill calculation.

The Maryland counties affected by this change are:
Dorchester... Somerset... Wicomico and Worcester.

The Virginia counties affected by this change are:
Accomack... Amelia... Brunswick... Caroline... Charles City...
Chesterfield... Cumberland... Dinwiddie... Essex... Fluvanna...
Gloucester... Goochland... Greensville... Hanover...
Henrico... Isle of Wight... James City... King And Queen...
King William... Lancaster... Louisa... Lunenburg... Mathews...
Mecklenburg... Middlesex... New Kent... Northampton...
Northumberland... Nottoway... Powhatan... Prince Edward...
Prince George... Richmond... Southampton... Surry... Sussex...
Westmoreland... and York.

The Virginia independent cities affected by this change are:
Chesapeake... Colonial Heights... Emporia... Franklin... Hampton...
Hopewell... Newport News... Norfolk... Petersburg... Poquoson...
Portsmouth... Richmond... Suffolk... Virginia Beach... and
Williamsburg.

To repeat... on December 1 2014... the National Weather Service
weather forecast office in Wakefield Virginia will change the
Wind Chill Advisory and warning across the portion of its area
of responsibility in Virginia and the lower Maryland Eastern
Shore.

If you have any questions... please contact:

Bill sammler
warning coordination meteorologist
or
Jeff Orrock
meteorologist in charge
NOAA/National Weather Service
10009 general Mahone Hwy.
Wakefield, VA 23888-2742
phone: 757-899-5732 or 757-899-5730
E-mail: William.Sammler@noaa.Gov or Jeff.Orrock@noaa.Gov


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