National Weather Service United States Department of Commerce

 

Proposed Future Coastal Hazard Message (CFW) -
Tropical Cyclone Storm Surge Example

 

***NOT FOR OPERATIONAL USE***

Below you can compare the current operational version of the storm surge content in the Local Tropical Cyclone Watch/Warning (TCV) text product with the proposed Coastal Hazard Message (CFW) content for the same conditions. 

The proposed future CFW for storm surge includes more detailed geographic information on the storm surge hazard both in the “WHERE” statement and in the supplemental information below the “&&” which includes the latitude/longitude pairs and a map-based depiction of the alert area. More information on this project can be found at this NWS page. 

 

Prototype Future Storm Surge Hazard
 

Coastal Hazard Message
National Weather Service WFO
1010 AM XDT Sun Sep 12 2021

 

XXZ073-131115-
/O.NEW.XWFO.SS.A.1014.210913T0310Z-000000T0000Z/
NWS Zone Name-
1010 PM XDT Sun Sep 12 2021

 

...STORM SURGE WATCH IN EFFECT...

 

* WHAT...Potentially life-threatening inundation of up to 4 ft above ground from
 Hurricane Name. The storm surge threat has increased since the previous
 assessment.

 

* WHERE...Xxxx County in State, including the cities of           
                 - City 1  {City within the storm surge watch polygon}
                 - City 2  {City within the storm surge watch polygon}

 

* WHEN...Tuesday morning until Wednesday evening.

 

* IMPACTS…

  - Conditions may become life-threatening within the watch area. 
  - Swift water could sweep you away.
  - Potential for numerous road closures and damage to structures along the coast.

  - Near-shore escape routes and secondary roads may become impassable.
  - Road closures may prevent emergency services from reaching you.

 

* ADDITIONAL DETAILS…{Optional text}.

 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

  - Move away from flood-prone areas.
  - Leave immediately if evacuation orders are given for your area. 
  - Have at least 5 days of supplies packed in case you must leave your home.
  - Be prepared for power and communication outages.

 

&&

 



$$

 


 

Current Storm Surge Hazard
 

TC Name Local Watch/Warning Statement/Advisory Number 3
National Weather Service WFO  AL##YYYY
1010 AM XDT Sun Sep 12 2021

 

XXZ073-131115-
/O.NEW.XWFO.SS.A.1014.210913T0310Z-000000T0000Z/
NWS Zone Name-
1010 PM XDT Sun Sep 12 2021

 

...STORM SURGE WATCH IN EFFECT...
 

A Storm Surge Watch means life-threatening inundation, from rising

water moving inland from the coastline, is possible somewhere within
 
this area within the next 48 hours

 

* LOCATIONS AFFECTED
    - City 1 {City in this NWS Zone but not necessarily in storm surge danger}
    - City 2  {City in this NWS Zone but not necessarily in storm surge danger}
    - City 3  {City in this NWS Zone but not necessarily in storm surge danger}

 

{TRUNCATED}

 

* STORM SURGE

    - LATEST LOCAL FORECAST: Life-threatening storm surge possible
        - Peak Storm Surge Inundation: The potential for 2-4 feet
 
          above ground somewhere within surge prone areas

        - Window of concern: Tuesday morning until Wednesday evening

 

    - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
      UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm
 
      surge flooding greater than 3 feet above ground

        - PLAN: Plan for life-threatening storm surge flooding of
 
          greater than 3 feet above ground.

        - PREPARE: Evacuation efforts and flood preparations should
 
          soon be brought to completion before conditions become
 
          unsafe.

        - ACT: Leave immediately if evacuation orders are given for your area to avoid being
          cut off from emergency services or needlessly risk lives.

 

    - POTENTIAL IMPACTS: Significant
        - Areas of inundation with storm surge flooding accentuated
 
          by waves. Damage to non-elevated structures is possible.

        - Sections of escape routes and secondary roads become
          weakened or washed out, especially in usually vulnerable
 
          low spots.

        - Major beach erosion with heavy surf breaching dunes. Strong
 
          and numerous rip currents.

        - Moderate damage to marinas, docks, and piers. Several small
          craft broken away from moorings, especially in unprotected
          anchorages.