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2007 hurricane season and target final retrofit to be complete before the 2008 hurricane season. During the 2007 season, all USAF aircraft will transmit HDOBS using the standardized product under the new UR..15 header – those aircraft not outfitted with SFMR will transmit using the new format with missing data values of 999 or similar as place holders. This schedule is subject to change.

Recommendation:

Update NHOP Appendix G with the new HDOBS format specification and retain the USAF SXXX50 HDOBS format specification for one year and denote it as legacy.

Action:

4.

Title:

Content Change Request for Tropical Cyclone ICAO Message - Informational

Submitter:

NOAA

Discussion:

Per WMO FTCM Doc 13, the ICAO tropical cyclone message provides current tropical cyclone information and forecast information for forecast intervals of +12, +18 and +24 hours. Those products are issued utilizing the following WMO header information:

WMO ID

CCID

PIL

PRODUCT TYPE

FKNT2{1-5} KNHC FKPZ2{1-5} KNHC FKPA2{1-5} PHFO

TCANT{1-5} Atlantic ICAO bulletin

TCAPZ{1-5} East Pacific ICAO bulletin

TCAPA{1-5} Central Pacific ICAO bulletin

The NWS will add an interpolated 6 HR forecast information to message body and notify external users of change effective May 15, 2007.

Note - Bolded text denotes the addition of the +06 forecast hr information.

FKNT25 KNHC 310900 TCANT TROPICAL STORM TEST ICAO ADVISORY NUMBER NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 0900 UTC SUN OCT 21 2007

27

AL242007

TC ADVISORY

DTG:

20071021/0900Z

TCAC:

KNHC

TC:

ERNESTO

NR:

027

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