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NOUS41 KWBC 031753

Service Change Notice 15-46: Corrected
National Weather Service Headquarters Washington DC
155 PM EDT Thu Sep 3 2015

To:          Subscribers:
             -Family of Services
             -NOAA Weather Wire Service
             -Emergency Managers Weather Information Network
             Other NWS Partners and Employees

From:        Michael Dion
             Acting Chief, Marine, Tropical, and Tsunami Services

Subject:     Corrected: Changes to Alaska Sea Ice Maps Effective
             October 1, 2015

Corrected the three-letter identifier for Anchorage in the first
paragraph, first sentence.

Effective Thursday, October 1, 2015, at 4:00 AM Alaska Daylight
Time (AKDT), 8:00 AM Eastern Daylight Time (EDT), or 1200
Coordinated Universal Time (UTC), the National Weather Service
(NWS) Weather Forecast Office (WFO) in Anchorage, Alaska (AFC),
will begin issuing sea ice analysis and forecast maps that meet
World Meteorological Organization (WMO) standards.  The analysis
maps will be issued daily, while the forecast maps will be issued
each Monday, Wednesday, and Friday.

The area of analysis will change to match exclusive economic zone
boundaries.  There will no longer be an analysis east of 135
degrees W longitude in the Beaufort Sea.  The analysis along
Kamchatka Peninsula south of the Gulf of Anadyr will no longer be
issued as well.

Additionally, the following changes will be made to the existing
maps.  Table 1 shows the current sea ice maps while Table 2 shows
the new sea ice maps:

Table 1:  Current Alaska sea ice maps:

-  Full area sea ice analysis (marine fax, black and white, and
-  Cook Inlet sea ice analysis (marine fax, black and white).
-  Full area sea ice forecast (marine fax, black and white) with
   a forecast for the sea ice edge only.
-  Sea surface temperature analysis.
-  Sea ice shapefile, with sea ice concentration and thickness.

Table 2:  New Alaska sea ice maps:

-  Full area sea ice analysis (marine fax, concentration in WMO
   standard colors, and WMO stage in standard colors).
-  Cook Inlet sea ice analysis will be available year-round.  The
   map will be shown in WMO standard colors for concentration and
-  Full area sea ice forecast area will be displayed as Marginal
   Ice Zone.  The forecast will be over the entire region, rather
   than just the ice edge.
-  Sea surface temperature analysis will only see cosmetic
   changes to the map.
-  Sea ice shapefile will be available in the WMO standard and
   gridded sea ice information (SIGRID) format.

A webpage comparing images of the old and new products is
available on the web at:

These sea ice and sea surface temperature maps will be available

For more information, please contact:

James Nelson
Science and Operations Officer
National Weather Service
WFO Anchorage
Anchorage, AK
(907) 266-5111

Louise Fode
Marine Program Manager
National Weather Service
WFO Anchorage
Anchorage, AK
(907) 266-5117

National Service Change Notices are online at:

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