Gloucester Severe Watches & Warnings NOAA Weather Radio

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