NOUS41 KWBC 271132



Service Change Notice 17-36

National Weather Service Headquarters Silver Spring MD

732 AM EDT Mon Mar 27 2017


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS partners and NWS employees


FROM:     William Bauman

          Chief, Aviation and Space Weather Services Branch


SUBJECT:  The validity period for four Terminal Aerodrome

          Forecast (TAF) locations are extending from 24 hours

          to 30 hours effective June 13 and June 29, 2017


Effective June 13, 2017, 1800 GMT, the validity period for TAFs

will extend from 24 hours to 30 hours for Sun Valley, ID (KSUN),

and Bozeman MT (KBZN). Effective June 29, 2017, at 1800 GMT,

TAFs will extend from 24 hours to 30 hours for Las Vegas, NV

(KLAS), and Phoenix, AZ, (KPHX).


The extension in the TAF validity period has been coordinated

with the Federal Aviation Administration and responsible NWS



If you have comments or questions, please contact:


Scott Birch

Regional Aviation Meteorologist

NWS Western Region Headquarters

Salt Lake City UT

Phone: 801-524-4000 X264



National Service Change Notice are online: