NOUS41 KWBC 272056



Service Change Notice 14-07

National Weather Service Headquarters Washington DC

400 PM EST Thu Feb 27 2014


TO:         National Weather Service (NWS) Offices

            Federal Aviation Administration (FAA) Customers

            Family of Services (FOS) Subscribers

            Other NWS Partners and employees


FROM:       Cynthia Abelman

            Chief, NWS Aviation Services Branch


SUBJECT:    Cessation of Use of the Decommissioned Portland,

            OR, VHF Omnidirectional Radio Range (VOR)

            Aviation Radio Navigation Site March 26, 2014


NOTE:       The following change has no impact on NOAA

            Weather Wire Service subscribers


Effective Wednesday March 26, 2014, at 1500 Coordinated Universal

Time (UTC), 1000 AM Eastern Standard Time, the NWS will cease

using the 3-letter identifier PDX as the Portland, OR, VOR

reference point in NWS AIRMETs and SIGMETs.


On June 27, 2013, the FAA decommissioned the VOR at Portland,

Oregon. The nearest VOR point to Portland is the Battle Ground

(BTG) VOR in Vancouver, WA, 9.6 miles north of Portland

International Airport. The exact location of BTG is N45 degrees,

44.87 minutes latitude and W122 degrees, 35.49 minutes longitude. 

Effective March 26, 2014, NWS will cease reference to the PDX VOR

identifier and begin referencing the BTG VOR for any weather

reference points in northwestern Oregon or southwestern



VORs are used by pilots for navigation and also are used in

aviation weather forecasts and SIGMETs as reference points in

defining the area of weather hazards. Since NWS uses VOR

locations to define areal coverage of weather hazards in addition

to their use as navigation aids, the NWS will make this name and

identifier change to maintain consistent terminology with FAA VOR



If you have questions regarding this product, contact:


     Michael Pat Murphy

     Warning Coordination Meteorologist

     Aviation Weather Center

     Kansas City MO 64153




National Service Change Notices are available online at: