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NOUS41 KWBC 181935

Service Change Notice 18-06
National Weather Service Headquarters Silver Spring MD
335 PM EST Thu Jan 18 2018

TO: Subscribers:
 -NOAA Weather Wire Service
 -Emergency Managers Weather Information Network
 Other NWS Partners and NWS Employees

FROM: Allison Allen
 Chief, Marine, Tropical, and Tsunami Services Branch

SUBJECT: Changes to the surface analyses and surface forecast
 charts produced by the OPC, TAFB and WFO Honolulu
 and addition of 72-hour surface and wind/wave forecast
 charts by OPC effective March 7, 2018

The NWS National Centers for Environmental Prediction`s (NCEP)
Ocean Prediction Center (OPC), the National Hurricane Center`s
(NHC) Tropical Analysis and Forecast Branch (TAFB), and the
Weather Forecast Office (WFO) in Honolulu, Hawaii, will change
the content of their surface analyses and/or forecast charts
effective Wednesday March 7, 2018.

The OPC will change the content of its surface analyses, and
24-, 48-, and 96-hour forecast charts. The TAFB will change the
content of its surface analyses and 72-hour forecast charts.
WFO Honolulu will change the content of its surface analyses.

Starting March 7, 2018, these charts will only depict future
forecast track information for extratropical low pressure
systems that have, or are forecast to have, hazards associated
with them. The hazards displayed will be gale, storm, hurricane-
force, developing gale, developing storm, developing hurricane-
force, and possible tropical cyclone. Heavy freezing spray
information and the ice edge will be included as well.

The analysis and forecast charts will no longer include past
track information. The analysis and forecasts charts also will
no longer include forecast tracks for the following: highs,
extratropical lows with no hazards associated or expected with
them, and tropical cyclones.  This change will improve OPC, TAFB
and WFO Honolulu forecaster ability to provide detail in their
digital forecasts. For OPC, the change will also result in the
implementation of 72-hour forecast surface and wind/wave charts
issued once daily effective March 7, 2018.

Additionally, the change will ensure consistency of information
regarding tropical cyclones found through text and graphics
supplied by the NHC, Central Pacific Hurricane Center (CPHC),
and Joint Typhoon Warning Center (JTWC).

An example of the change can be found at:

No immediate changes will occur to the schedule of radiofax
charts produced by the OPC, TAFB or WFO Honolulu or to the
radiofax schedule via the Worldwide Marine Radiofacsimile

The 72-hour forecast information will be found at the OPC web
page, Efforts will be made to
incorporate the 72-hour forecast information into the radiofax
schedule at a later date.

There will be no changes to the Unified Surface Analysis which
can also be found at

Surface analyses and forecast charts can be found on the OPC web
site at:




Surface analyses and forecast charts can be found on the TAFB
web site at:

Hawaiian marine products can be found on the WFO Honolulu web

Tropical cyclone information for the North Atlantic and eastern
North Pacific can be found at the NHC web site at: and at

Tropical cyclone information for the central North Pacific can
be found at the CPHC web site at:

Tropical cyclone information for the northwest Pacific can be
found at the JTWC website at:

Users do not need to make any changes to their systems to
continue receiving these products.

Please send comments or requests for more information to:

Darin Figurskey
OPC Operations Branch Chief

Eric Christensen
TAFB Operations Acting Branch Chief

Christopher Brenchley
WFO Honolulu Meteorologist in Charge

National Service Change Notices are online at: is the U.S. government's official web portal to all federal, state and local government web resources and services.