NOUS41 KWBC 231220



Service Change Notice 17-02

National Weather Service Headquarters Silver Spring MD

820 AM EST Mon Jan 23 2017


To:       Subscribers:

          -NOAA Weather Wire Service

          -Emergency Managers Weather Information Network


          Other NWS Partners and NWS Employees


From:     Michelle Hawkins

          Chief; Severe, Fire, Public, and Winter Weather

          Services Branch


Subject:  Changes to Public Forecast Zones for NWS Weather

          Forecast Office (WFO) Phoenix, Arizona, Effective

          April 4, 2017


Effective Tuesday, April 4, 2017, at 1000 AM Pacific Standard

Time, 1100 AM Mountain Standard Time, 1800 Coordinated Universal

Time (UTC), the NWS WFO in Phoenix, Arizona (WFO PSR), will

change all public forecast zone names and boundaries. Upon

implementation of this change, all public forecasts and related

products will use the zone numbers and names shown below.


The zone changes will improve services by allowing more fine-

tuned warnings and advisories for hazards such as dust, fog, and

winter weather and reflect changes in transportation and

population growth throughout the area.


The new zone numbers and names are listed below:


WFO Phoenix, Arizona, Public Weather Forecast Zones


Zone Number             Zone Name

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

AZ530                   Parker Valley

AZ531                   Kofa

AZ532                   Yuma

AZ533                   Central La Paz

AZ534                   Aguila Valley

AZ535                   Southeast Yuma County

AZ536                   Gila River Valley

AZ537                   Northwest Valley

AZ538                   Tonopah Desert

AZ539                   Gila Bend

AZ540                   Buckeye/Avondale

AZ541                   Cave Creek/New River

AZ542                   Deer Valley

AZ543                   Central Phoenix

AZ544                   North Phoenix/Glendale

AZ545                   New River Mesa

AZ546                   Scottsdale/Paradise Valley

AZ547                   Rio Verde/Salt River

AZ548                   East Valley

AZ549                   Fountain Hills/East Mesa

AZ550                   South Mountain/Ahwatukee

AZ551                   Southeast Valley/Queen Creek

AZ552                   Superior

AZ553                   Northwest Pinal County

AZ554                   West Pinal County

AZ555                   Apache Junction/Gold Canyon

AZ556                   Tonto Basin

AZ557                   Mazatzal Mountains

AZ558                   Pinal/Superstition Mountains

AZ559                   Sonoran Desert Natl Monument

AZ560                   San Carlos

AZ561                   Dripping Springs

AZ562                   Globe/Miami

AZ563                   Southeast Gila County

CA560                   Joshua Tree NP West

CA561                   Joshua Tree NP East

CA562                   Imperial County Southwest

CA563                   Salton Sea

CA564                   Chuckwalla Mountains

CA565                   Imperial County Southeast

CA566                   Imperial County West

CA567                   Imperial Valley

CA568                   Chiriaco Summit

CA569                   Palo Verde Valley

CA570                   Chuckwalla Valley


These zones will be replacing existing zones:


Zone Number             Zone Name

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

AZ027                   Southwest Maricopa County

AZ023                   Greater Phoenix Area

AZ022                   Northwest Maricopa County

AZ020                   Lower Colorado River Valley AZ

AZ021                   West Central Deserts

AZ028                   Northwest and North Central Pinal County

AZ025                   Yuma/Martinez Lake and Vicinity

CA032                   Riverside County/Eastern Deserts

CA033                   Imperial County

AZ024                   Southern Gila/Tonto NF Foothills

AZ026                   Southwest Deserts

CA030                   Joshua Tree National Park

CA031                   Lower Colorado River Valley CA


The zone changes are described at the following two links.


Updated public zone shapefiles are online at:

A graphical depiction of this change is online at:


For more information, please contact:


Ken Waters

Warning Coordination Meteorologist

National Weather Service

Weather Forecast Office

Tempe, AZ 85281



National Service Change Notices are online at: