Effective May 15 2003...in response to the needs of NWS customers the Tropical Prediction Center/National Hurricane Center /NHC/ and the Central Pacific Hurricane Center /CPHC/ will extend tropical cyclone forecast products from 3 days (72 hours) to 5 days (120 hours). Increasing tropical cyclone forecasts to 5 days changes the following products.
Product | WMO Heading | AWIPS ID |
---|---|---|
Atlantic | WTNT<21-25> KNHC | TCMAT<1-5> |
East Pacific | WTPZ<21-25> KNHC | TCMEP<1-5> |
Central Pacific | WTPA<21-25> PHFO | TCMCP<1-5> |
Product | WMO Heading | AWIPS ID |
---|---|---|
Atlantic | WTNT<41-45> KNHC | TCDAT<1-5> |
East Pacific | WTPZ<41-45> KNHC | TCDEP<1-5> |
Central Pacific | WTPA<41-45> PHFO | TCDCP<1-5> |
Note...there are no changes to WMO headings or AWIPS identifiers and no actions are required for continued receipt of products from NHC and CPHC. However...the issuing office line identifier in the Mass News Disseminator Block for the TCM and TCD will change to ensure these products conform to NWS Instruction (NWSI) 10-1701...entitled Text Formats and Codes.
The Issuing Office Line Identifier for NHC products will read
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
The Issuing Office Line Identifier for CPHC products will read
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI
Users of tropical cyclone forecast products are encouraged to not focus on just the forecast position of a storm center...but to consider the uncertainty associated with storm track errors...as well as the potentially large geographic area that may be impacted by tropical cyclone conditions. Average errors noted in the TCM products are based on the past two years of experimental forecasts.
If you have any questions...please contact
Mr. Scott Kiser
National Weather Service
Marine and Coastal Services Branch
1325 East West Hwy Room 13126
Silver Spring, MD 20910
Phone: 301-713-1677 Extension 121
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Page last modified: Thursday, 17-Mar-2016 16:56:36 UTC