Service Change Notice 16-09

National Weather Service Headquarters Washington DC

720 AM EDT Fri Apr 1 2016


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners and NWS Employees


From:     Robyn Heffernan

          Acting Chief, Severe, Fire, Public and Winter Services



Subject:  Changes to Public Forecast Zones of Northwest

          California effective June 16, 2016


Effective Thursday, June 16, 2016, at 1000 AM Pacific Daylight

Time, 1800 Coordinated Universal Time (UTC), the NWS Weather

Forecast Office in Eureka, CA, (WFO EKA) will implement new

public forecast zones for Del Norte, Humboldt, Trinity, and

Mendocino counties. Upon implementation of this change, all

public forecasts and related products will use the new zone

numbers and names shown below.


The zone changes are designed to improve watch, warning, and

advisory area specification and simplify the wording within the

zone forecast product.


Table 1: New WFO EKA Public Weather Forecast Zone Numbers and

Names effective June 16, 2016


Zone Number                 Zone Name

---------------             --------------------


CAZ101                      Coastal Del Norte

CAZ102                      Del Norte Interior

CAZ103                      Northern Humboldt Coast

CAZ104                      Southwestern Humboldt

CAZ105                      Northern Humboldt Interior

CAZ106                      Southern Humboldt Interior

CAZ107                      Northern Trinity

CAZ108                      Southern Trinity

CAZ109                      Mendocino Coast

CAZ110                      Northwestern Mendocino Interior

CAZ111                      Northeastern Mendocino Interior

CAZ112                      Southwestern Mendocino Interior

CAZ113                      Southeastern Mendocino Interior


Table 2: Old WFO EKA Public Weather Forecast Zones: not used

after June 16, 2016


CAZ001                      Redwood Coast

CAZ002                      Mendocino Coast

CAZ003                      North Coast Interior

CAZ004                      Upper Trinity River

CAZ076                      Mendocino Interior


A detailed description of the new WFO EKA public weather

forecast zones is online at:


An updated public zone shapefiles is online at:


Table 3:  WFO EKA text products affected by this change


Product Name                   WMO Heading    AWIPS ID

------------                   -----------    --------

Hazardous Weather Outlook      FLUS46 KEKA    HWOEKA

Air Quality Alert              AEUS76 KEKA    AQAEKA

Public Information Statement   NOUS46 KEKA    PNSEKA

Flood Watch                    WGUS66 KEKA    FFAEKA

Hydrologic Outlook             FGUS76 KEKA    ESFEKA

Coastal Hazard Message         WHUS46 KEKA    CFWEKA

Zone Forecast                  FPUS56 KEKA    ZFPEKA

Short Term Forecast            FPUS76 KEKA    NOWEKA

Tsunami Message                WEPA41 PAAQ    TSUWCA

Non Precipitation Warning      WWUS76 KEKA    NPWEKA

Winter Storm Warning           WWUS46 KEKA    WSWEKA


This change affects Public Weather Forecast Zones using UGC-Z

coding only.  No Fire Weather Forecast Zones or UGC-C changes

are being made.  Partners and users may need to update their

system(s) to continue receiving public weathers forecasts for

these new zones.


For more information, please contact:


  Troy Nicolini



  Mel Nordquist

  Science and Operations Officer


  Weather Forecast Office

  Eureka, CA 95501



National Service Change Notices are online at: