WFO Chicago/Romeoville Now Providing 3-hourly TAF Service

National Weather Service Aviation Weather Partners,

In the continuing effort to expand and improve service to the aviation community, the National Weather Service Weather Forecast Office (WFO), Chicago/Romeoville began 3-hourly Terminal Aerodrome Forecast (TAF) service as of the 15Z TAF issuance Tuesday morning, 9:00 AM CST December 1, 2009.

All five TAF sites serviced by WFO Chicago/Romeoville will receive mandatory updates every three hours to provide the aviation community with the latest information possible.  These airports are:

  • Chicago O'Hare International Airport (ORD)
  • Chicago Midway Airport (MDW)
  • Northwest Chicagoland Regional Airport at Rockford (RFD)
  • Chicago-West DuPage Airport (DPA)
  • Gary-Chicago Airport (GYY) 


Since the interim 3-hourly TAF issuance is an update to the regularly scheduled TAFs, an additional 3 hours will not be added to the end of the TAF period. Also, the interim 3-hourly TAF issuance will not replace unscheduled updates.Rather, it is envisioned that these updates will give improved lead time on any anticipated changes to the prevailing weather conditions.

Any questions or concerns can be directed to:

Andrew Krein
Aviation Program Co-Leader
NWS Chicago/Romeoville

andrew.krein@noaa.gov
(815) 834-0600 ext. 286



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