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181
NOUS41 KWBC 291545
PNSWSH

Service Change Notice 16-35
National Ocean Service Office of Coast Survey Silver Spring MD
Relayed by the National Weather Service
1145 AM EDT Thu Sep 29, 2016

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

From:  Edward Myers
  Chief, Coastal Marine Modeling Branch
  Coast Survey Development Laboratory
  NOS/Office of Coast Survey

Subject:  Amended: Addition of a map service to NOAA`s nowCOAST(tm)
to
  provide access to NWS/National Hurricane Center`s
  Potential Storm Surge Flooding Map Effective
  September 28, 2016

Amended to change date from Oct. 5 to Sept. 28, 2016 due to possible
Critical
Weather Day next week

As of 3 PM EDT Wednesday, September 28, 2016, the NOAA nowCOAST(tm)
(nowcoast.noaa.gov) provides access to the NWS/National Hurricane
Center
Potential Storm Surge Flooding Map via web mapping services. Users
can
access
the Potential Storm Surge Flooding Map using two different protocols:
ArcGIS
Representational State Transfer (REST) Map Service and OGC Web Map
Service
(WMS).This service will allow NOAA users to integrate this map with
their
own map layers such as coastal evacuation routes and critical
infrastructure
on client- or server-based Geographic Information Systems or other
mapping
applications. In addition, users will also be able to view the NHC
map via
the nowCOAST map viewer.

The Potential Storm Surge Flooding Map was developed by the NHC over
the
course of several years in consultation with social scientists,
emergency
managers, broadcast meteorologists, and others. The map is intended
to
depict
the risk associated with coastal flooding from storm surge associated
with
tropical cyclones.  On June 1, 2016 it became an operational product,
issued
on demand for certain tropical cyclones that are expected to affect
the
Atlantic or Gulf Coasts of the United States.

The nowCOAST map service will provide access to the latest official
NWS
Potential Storm Surge Flooding Map which depicts the geographical
areas
where
inundation from storm surge could occur along with the heights, above
ground,
that water could reach in those areas. These potential heights are
represented with different colors based on water level:

Greater than 1 foot above ground (blue)
Greater than 3 feet above ground (yellow)
Greater than 6 feet above ground (orange)
Greater than 9 feet above ground (red)

Two versions of this graphic are provided in this map--one with a
mask
(depicted in gray) identifying Intertidal Zone/Estuarine Wetland
areas and
another version without the Intertidal Zone/Estuarine Wetland mask.
Two
additional layers are provided to depict first, the full geographic
extent
for which the map is presently valid (the "map boundary"), and
second,
Levee
Areas, if any, within the affected area (symbolized with a
black-and-white
diagonal hatch pattern). If the map is not presently active, all
layers
will
be blank except for the Map Boundary layer, which will display a gray
shaded
region indicating the coverage area for any potential future graphics
along
with a text label indicating that the map is not presently available.

The nowCOAST map service will be updated approximately every  10
minutes to
ensure the latest information is provided to the user as soon as it
becomes
available. Once issued, the Potential Storm Surge Flooding Map will
be
updated by NHC every 6 hours alongside each new NHC Forecast Advisory
for
the
associated tropical cyclone. Due to processing requirements, however,
during
the creation of this product, the map will be available approximately
60 to
90 minutes following the release of the associated Forecast Advisory,
at
which point nowCOAST will acquire it and update this map service
within the
next 10 to  20 minutes (i.e., this product will be updated on
nowCOAST
within approximately 70 to 110 minutes after the associated forecast
advisory
is released).

This new nowCOAST map service can be found at
http://nowcoast.noaa.gov/arcgis/rest/services/nowcoast/wwa_meteocean_
tropical
cyclones_inundation/MapServer

Additional information about NHCs Potential Storm Surge
Flooding Map can be found at
http://www.nhc.noaa.gov/pdf/PDD-PotentialStormSurgeFloodingMap.pdf

nowCOAST provides coastal intelligence on present and future
environmental conditions for coastal and maritime users by
integrating data and information from across NOAA and other
federal and state agencies.  nowCOAST was developed by NOS
Coast Survey Development Laboratory, and is hosted on NOAAs
Integrated Dissemination Program (IDP) infrastructure where it
is monitored 24 x 7 by NWS/NCEP Central Operations.

For questions concerning this new map service, please contact:

John G.W. Kelley
NOS Co-Project Manager
NOS/OCS/CSDL/CMMB
Silver Spring, MD
Email: nowcoast.team@noaa.gov

Nipa Parikh
NWS Co-Project Manager
NWS/OD/IDP
Silver Spring, MD
Email: nipa.parikh@noaa.gov

For questions concerning the NHC Potential Storm Surge Flooding
Map, please contact:

Jamie Rhome
Storm Surge Specialist and Team Lead
NWS/NCEP/NHC Storm Surge Unit
Miami, FL
Email: Jamie.r.Rhome@noaa.gov

For information about NOAA/IDP, please contact:

Michelle M. Mainelli
NOAA Integrated Dissemination Program Manager
NWS Office of Dissemination
Silver Spring, MD
Email: Michelle.M.Mainelli@noaa.gov

National Service Change Notices are online at:

http://www.weather.gov/os/notif.htm



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