NOUS41 KWBC 231158



Public Information Statement

National Weather Service Headquarters Washington DC

750 AM EDT Fri May 23 2014


To:      Subscribers:

         -Family of Services

         -NOAA Weather Wire Service

         -Emergency Managers Weather Information Network


         Other NWS Partners, and NWS Employees


From:    Mark Tew

         Chief, Marine and Coastal Weather Services Branch 


Subject: Soliciting comments for Experimental Potential Storm

         Surge Flooding Map through November 30, 2014


Effective June 1, 2014 and continuing through November 30, 2014,

the NWS is seeking user feedback on experimental Potential Storm

Surge Flooding Map issued by the National Hurricane Center (NHC).  


Developed over the course of several years in consultation with

emergency managers, broadcast meteorologists, and others, this

new map will show:


- Geographical areas where inundation from storm surge could


- How high above ground the water could reach in those areas


Areas of flooding on the map are represented in different colors

based on water level:


  Blue: up to 3 feet above ground

  Yellow: greater than 3 feet above ground

  Orange: greater than 6 feet above ground 

  Red: greater than 9 feet above ground


The map does not take into account wave action, freshwater

flooding from rainfall, flooding inside levees and overtopping of



The initial map will usually be issued at the same time as the

initial hurricane watch or, in some cases, a tropical storm

watch, for any portion of the Gulf or East Coast of the United

States. The map is based on the latest forecast track and

intensity for the tropical cyclone, and takes into account likely

forecast errors.


In association with every new NHC full advisory package, the map

is subject to change every 6 hours. Due to the processing time

required to generate the storm surge guidance and produce the

map, it will be available about 60 minutes following advisory



The map represents a reasonable estimate of worst-case scenario

flooding of normally dry land at particular locations due to

storm surge. There is a 1-in-10 chance that the storm surge

flooding at any particular location could be higher than the

values shown on the map. The map is created from multiple runs of

the Sea, Lake, and Overland Surges from Hurricanes (SLOSH) model.

Additional information and examples of the map can be found

online at:


The map will be available on the NHC website at:


Users are encouraged to provide feedback on this new experimental

product by using the brief survey and comment form available on

line at:


For technical questions regarding this notice, please contact:


Jamie Rhome

National Hurricane Center

Storm Surge Team Lead

Miami, FL  33165

Telephone: 305-229-4444



For policy questions regarding this notice, please contact:


John Kuhn

NWS Marine and Coastal Weather Services Branch

Silver Spring, MD 20910

Telephone: 301-713-1677 X121



National Public Information Statements are online at: