NOUS41 KWBC 161333

PNSWSH

 

Service Change Notice 14-01

National Weather Service Headquarters Washington DC

830 PM EST Tue Jan 14 2014   

 

TO:       Subscribers:

          -Family of Services

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network

          -NOAAPORT

          Other NWS Partners, Users and Employees

 

FROM:     Mark Tew

          Chief, Marine and Coastal Weather Services Branch

 

SUBJECT:  Extending Comment period to June 30, 2014, for

          Experimental Wave Terminology change for coastal waters

          from Point Saint George to Point Arena, CA,

 

On September 19, 2012 the NWS Weather Forecast Office in Eureka,

CA, changed to an experimental new terminology for describing the

sea state in its Coastal Waters Forecast (CWF).  This change was

announced in SCN 12-27 posted at

 

http://www.nws.noaa.gov/om/notification/scn12-27eka_wave.htm

 

The original comment period began September 19, 2012, and is now

extended through June 30, 2014.  In response to comments, NWS

Eureka changed the experimental wave terminology. The extension

of the comment period allows users to provide feedback on these

changes.

 

Areas affected include the coastal waters from Point Saint George

to Point Arena, CA. The purpose of the change is to evaluate the

following wave terminology:

 

Sea state will be described by providing detailed wave

information to the extent it is useful for the mariner. The

amount of detailed wave information provided will depend on the

conditions. For example, when there is only a single wave, that

wave’s direction, height and period will be given.

 

For example:

 

WAVES NW 6 FT AT 10 SECONDS

 

When there are two distinct waves, the two waves that make up

that sea state will be described.

 

For example:

 

WAVES NW 7 FT AT 10 SECONDS... AND SW 5 FT AT 14 SECONDS

 

Below is an example of a 5-day forecast from the NWS Eureka:

 

TODAY...NW WIND 5 TO 15 KT. WAVES NW 6 FT AT 10 SECONDS.

TONIGHT...N WIND 10 TO 20 KT. WAVES N 3 FT AT 4 SECONDS...AND NW

7 FT AT 11 SECONDS.

SAT...N WIND 10 TO 20 KT. WAVES N 4 FT AT 4 SECONDS...AND NW 7 FT

AT 10 SECONDS.

SAT NIGHT...N WIND 20 TO 25 KT.  WAVES  N 7 FT AT 6 SECONDS...AND

6 FT AT 10 SECONDS.

SUN...N WIND 20 TO 30 KT WITH GUSTS TO 40 KT. WAVES N 10 FT AT 9

SECONDS.

MON...N WIND 20 TO 30 KT WITH GUSTS TO 35 KT. WAVES N 10 FT AT 9

SECONDS.

TUE...N WIND 15 TO 25 KT WITH GUSTS TO 30 KT. WAVES 8 FT AT 8

SECONDS.

 

NWS will no longer use the terms WIND WAVE and SWELL because the

characteristics of the sea state will be communicated by using

the more descriptive direction, height, and period of the

individual wave system. The reasons for this change and an

explanation of the significance of wave direction, height, and

period is available at:

 

www.weather.gov/eureka/waves

 

If response is favorable, the NWS will evaluate the experimental

wave terminology product for transition to an operational product

with national availability. If the test results are not

favorable, the wave portion of the coastal waters forecast will

revert to the previous format.

 

Users are encouraged to provide feedback on this change to the

marine forecast by using the brief survey and comment form

available at:

 

http://www.nws.noaa.gov/survey/nws-survey.php?code=EENWT

 

Table 1 lists products issued by NWS Eureka affected by this

change which began September 19, 2012

 

Table 2 contains lists of the current marine zones affected by

the change in WFO Eureka’s Coastal Waters Forecast (CWF)

 

Table 1: WFO EUREKA PRODUCTS

 

Product Name              AWIPS ID     WMO Heading

 

COASTAL WATERS FORECAST   CWFEKA       FZUS56 KEKA

 

 

Table 2: Affected marine zones and corresponding UGCs for WFO

Eureka

 

Current Marine Zone Name                           Current UGC

 

PT ST GEORGE TO CAPE MENDOCINO...OUT 10 NM         PZZ450

PT ST GEORGE TO CAPE MENDOCINO...10 TO 60 NM       PZZ470

CAPE MENDOCINO TO PT ARENA...OUT 10 NM             PZZ455

CAPE MENDOCINO TO PT ARENA...10 TO 60 NM           PZZ475

 

Users do not need to make any changes to their systems to receive

the CWF product from NWS Eureka.

 

For question or comments about this change, contact:

 

Troy Nicolini

Warning Coordination Meteorologist

NOAA National Weather Service

Eureka, CA 95501-6000

707-443-6484 x 223

troy.nicolini@noaa.gov

 

NWS Public Information Statements are online at:

 

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

 

$$