610
NOUS41 KWBC 191400
PNSWSH
SERVICE CHANGE NOTICE 25-92
NATIONAL WEATHER SERVICE HEADQUARTERS SILVER SPRING MD
900 AM EST FRI DEC 19 2025
TO: SUBSCRIBERS:
-NOAA WEATHER WIRE SERVICE
-EMERGENCY MANAGERS WEATHER INFORMATION NETWORK
-NOAAPORT
OTHER NWS PARTNERS, USERS AND EMPLOYEES
FROM: MARY MULLUSKY, CHIEF
OPERATIONS SERVICES DIVISION
SUBJECT: CHANGES TO PUBLIC FORECAST ZONES FOR WFO EUREKA, CA,
EFFECTIVE MARCH 3, 2026
EFFECTIVE TUE, MARCH 3, 2026, AT 1:00 PM PACIFIC STANDARD TIME
(ST), 2100 COORDINATED UNIVERSAL TIME (UTC), THE NWS WEATHER
FORECAST OFFICE IN EUREKA, CA (EKA) WILL CHANGE PUBLIC WEATHER
FORECAST ZONES ENCOMPASSING DEL NORTE, HUMBOLDT, TRINITY,
MENDOCINO, AND LAKE COUNTIES IN NORTHWESTERN CALIFORNIA. AFTER
THIS CHANGE, ALL FORECASTS AND RELATED PRODUCTS WILL USE THE
ZONE NUMBERS AND NAMES SHOWN IN TABLE 2 BELOW.
IF MARCH 3, 2026 IS DECLARED A CRITICAL WEATHER DAY, THIS
IMPLEMENTATION WILL BE POSTPONED TO MARCH 4, 2026 AT 2100 UTC.
THESE CHANGES WILL RESULT IN MORE GEOGRAPHICALLY PRECISE
FORECAST, WATCH AND WARNING PRODUCTS FOR THE GENERAL PUBLIC AND
WILL ENHANCE WEB-BASED GRAPHICAL PRODUCT CONSISTENCY AND
APPEARANCE.
FIFTEEN (15) CURRENT ZONES WILL BE CONVERTED INTO 18 SEPARATE
ZONES.THESE NEW ZONES ARE BEING DIVIDED TO OPTIMIZE ISSUANCE
OF HAZARD PRODUCTS FOR CONDITIONS THAT VARY SIGNIFICANTLY IN
SOME INTERIOR MOUNTAINOUS REGIONS. THE NEW ZONES ARE LISTED IN
TABLE 2.
TABLE 1. UNIVERSAL GEOGRAPHIC CODES (UGC): CURRENT PUBLIC
FORECAST ZONE NAMES
----------------------------------
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
CAZ114: NORTHERN LAKE
CAZ115: SOUTHERN LAKE
TABLE 2. UGC: NEW PUBLIC FORECAST ZONE NAMES
-------------------------------
CAZ101: COASTAL DEL NORTE
CAZ102: INTERIOR DEL NORTE
CAZ103: NORTHERN COASTAL HUMBOLDT
CAZ104: SOUTHWESTERN HUMBOLDT
CAZ105: NORTHEASTERN INTERIOR HUMBOLDT
CAZ106: SOUTHEASTERN INTERIOR HUMBOLDT
CAZ108: SOUTHERN TRINITY
CAZ109: COASTAL MENDOCINO
CAZ110: NORTHWESTERN INTERIOR MENDOCINO
CAZ111: NORTHEASTERN INTERIOR MENDOCINO
CAZ112: SOUTHWESTERN INTERIOR MENDOCINO
CAZ113: SOUTHEASTERN INTERIOR MENDOCINO
CAZ114: NORTHERN LAKE
CAZ116: NORTHWESTERN AND CENTRAL TRINITY
CAZ117: NORTHEASTERN TRINITY
CAZ118: WESTERN LAKE
CAZ119: SOUTHWESTERN LAKE
CAZ120: EASTERN LAKE
TABLE 3. NWS PRODUCTS AFFECTED BY THE WFO EUREKA, CA, PUBLIC
FORECAST ZONE CHANGES ARE LISTED BELOW.
PRODUCT NAME WMO HEADING AWIPS ID
------------- ----------- --------
AIR QUALITY ALERT AEUS76 KEKA AQAEKA
ZONE FORECAST FPUS56 KEKA ZFPEKA
POINT FORECAST MATRICES FOUS56 KEKA PFMEKA
TABULAR STATE FORECAST FPUS66 KEKA SFTEKA
AREA FORECAST DISCUSSION FXUS66 KEKA AFDEKA
SHORT TERM FORECAST FPUS76 KEKA NOWEKA
SPECIAL WEATHER STATEMENT WWUS86 KEKA SPSEKA
PUBLIC INFORMATION STATEMENT NOUS46 KEKA PNSEKA
NON-PRECIPITATION WATCH/WARNING/ WWUS76 KEKA NPWEKA
ADVISORY
COASTAL HAZARD MESSAGE WHUS46 KEKA CFWEKA
SURF ZONE FORECAST FZUS56 KEKA SRFEKA
TSUNAMI MESSAGE WEPA41 PAAQ TSUWCA
PUBLIC TSUNAMI MESSAGE WEAK51 PAAQ TSUAK1
MENSAJE DE TSUNAMI WEAK61 PAAQ TSUSPN
FLOOD WATCH WGUS66 KEKA FFAEKA
HYDROLOGIC OUTLOOK FGUS76 KEKA ESFEKA
WINTER WEATHER MESSAGE WWUS46 KEKA WSWEKA
WATCH COUNTY NOTIFICATION WWUS66 KEKA WCNEKA
NWS PARTNERS AND USERS WILL NEED TO MAKE NECESSARY CHANGES TO
THEIR COMMUNICATIONS SYSTEMS TO ACCOMMODATE THESE WEATHER
FORECAST ZONE CHANGES.
PRELIMINARY SHAPEFILES FOR PUBLIC FORECAST ZONES ARE AVAILABLE
ONLINE AT:
HTTPS://WWW.WEATHER.GOV/GIS/PUBLICZONES
FINAL VERSIONS OF THESE SHAPEFILES WILL BE AVAILABLE ON FEBRUARY
13, 2026.
A GRAPHICAL DEPICTION OF THIS CHANGE IS ONLINE AT:
HTTPS://WWW.WEATHER.GOV/EKA/PUBLIC_ZONE_CHANGE_2026
FOR MORE INFORMATION, PLEASE CONTACT:
RYAN AYLWARD
WARNING COORDINATION METEOROLOGIST
NWS EUREKA, CA
RYAN.AYLWARD@NOAA.GOV
NATIONAL SERVICE CHANGE NOTICES ARE ONLINE AT:
HTTPS://WWW.WEATHER.GOV/NOTIFICATION/
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page