800
NOUS41 KWBC 191335
PNSWSH
SERVICE CHANGE NOTICE 25-90
NATIONAL WEATHER SERVICE HEADQUARTERS SILVER SPRING MD
835 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 AND FIRE FORECAST ZONES FOR WFO
SACRAMENTO, CA EFFECTIVE MARCH 3, 2026
EFFECTIVE TUE, MARCH 3, 2026, AT 1:00 PM PACIFIC STANDARD TIME
(PST), 2100 COORDINATED UNIVERSAL TIME (UTC), THE NWS WEATHER
FORECAST OFFICE IN SACRAMENTO, CA (STO) WILL CHANGE PUBLIC AND
FIRE WEATHER FORECAST ZONES ENCOMPASSING ALL COUNTIES IN THEIR
FORECAST AREA OF INTERIOR NORTHERN CALIFORNIA.AFTER THIS
CHANGE, ALL FORECASTS AND RELATED PRODUCTS WILL USE THE ZONE
NUMBERS AND NAMES SHOWN IN TABLE 3 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, WARNING, AND ADVISORY PRODUCTS AND WILL ENHANCE
WEB-BASED GRAPHICAL PRODUCT CONSISTENCY AND APPEARANCE.
TWELVE (12)CURRENT PUBLIC ZONES AND 15 CURRENT FIRE ZONES WILL
BE CONVERTED INTO 44 SEPARATE ZONES. THESE NEW ZONES ARE BEING
DIVIDED TO OPTIMIZE ISSUANCE OF HAZARD PRODUCTS FOR CONDITIONS
THAT VARY SIGNIFICANTLY DUE TO TOPOGRAPHY AND MICROCLIMATE
ZONES. THE NEW ZONES ARE LISTED IN TABLE 3.
TABLE 1. UNIVERSAL GEOGRAPHIC CODES (UGC): CURRENT PUBLIC
FORECAST ZONE NAME
----------------------------------
CAZ013: SHASTA LAKE AREA / NORTHERN SHASTA COUNTY
CAZ014: BURNEY BASIN / EASTERN SHASTA COUNTY
CAZ015: NORTHERN SACRAMENTO VALLEY
CAZ016: CENTRAL SACRAMENTO VALLEY
CAZ017: SOUTHERN SACRAMENTO VALLEY
CAZ018: CARQUINEZ STRAIT AND DELTA
CAZ019: NORTHERN SAN JOAQUIN VALLEY
CAZ063: MOUNTAINS SOUTHWESTERN SHASTA COUNTY TO WESTERN COLUSA
COUNTY
CAZ066: NORTHEAST FOOTHILLS/SACRAMENTO VALLEY
CAZ067: MOTHERLODE
CAZ068: WESTERN PLUMAS COUNTY/LASSEN PARK
CAZ069: WEST SLOPE NORTHERN SIERRA NEVADA
TABLE 2. UGC: CURRENT FIRE FORECAST ZONE NAME
----------------------------------
CAZ213: EASTERN PORTION OF SHASTA/TRINITY NF
CAZ214: BURNEY BASIN AND NORTHEAST PLATEAU IN SHASTA COUNTY
INCLUDING NORTHWEST LASSEN NF NORTH OF LASSEN NP
CAZ215: NORTHERN SACRAMENTO VALLEY TO SOUTHERN TEHAMA COUNTY
LINE BELOW 1000 FT
CAZ216: CENTRAL SACRAMENTO VALLEY INCLUDING GLENN/COLUSA/YUBA/
NORTHERN SUTTER/BUTTE COUNTY BELOW 1000 FT
CAZ217: SOUTHERN SACRAMENTO VALLEY IN YOLO/SACRAMENTO/FAR
WESTERN PLACER/SOUTHERN SUTTER AND SOLANO COUNTY BELOW
1000 FT - EXCLUDES THE DELTA
CAZ218: EASTERN DELTA
CAZ219: NORTHERN SAN JOAQUIN VALLEY IN SAN JOAQUIN AND
STANISLAUS COUNTIES BELOW 1000 FT - EXCLUDES THE DELTA
CAZ220: SOUTHERN MOTHERLODE FROM 1000 TO 3000 FT/CALAVERAS AND
TUOLUMNE COUNTIES
CAZ221: STANISLAUS NATIONAL FOREST
CAZ263: SOUTHEAST EDGE SHASTA/TRINITY NF AND WESTERN PORTIONS OF
TEHAMA/GLENN RU
CAZ266: NORTHERN SIERRA FOOTHILLS FROM 1000 TO 3000 FT. INCLUDES
NEVADA-YUBA-PLACER RU AND ANADOR-ELDORADO RU
CAZ267: NORTHERN MOTHERLODE FROM 1000 TO 3000 FT. FROM YUBA TO
AMADOR COUNTIES
CAZ268: NORTHERN SIERRA INCLUDING LASSEN NP AND PLUMAS AND
LASSEN NF/S WEST OF THE SIERRA CREST - WEST OF EVANS
PEAK/GRIZZLY PEAK/BECKWORTH PEAK
CAZ269: TAHOE - ELDORADO NATIONAL FOREST
CAZ279: EASTERN MENDOCINO NF
TABLE 3. NEW UGC: NEW PUBLIC/FIRE FORECAST ZONE NAME
-------------------------------
CAZ121: WESTERN SHASTA COUNTY MOUNTAINS ABOVE 3000 FT
CAZ122: WESTERN SHASTA COUNTY FOOTHILLS BETWEEN 1000-3000 FT
CAZ123: SHASTA LAKE AREA AND INTERSTATE 5 BETWEEN 1000-3000 FT
CAZ124: SOUTH-CENTRAL SHASTA COUNTY INCLUDING REDDING METRO
CAZ125: EASTERN SHASTA COUNTY FOOTHILLS BETWEEN 1000-3000 FT
CAZ126: EASTERN SHASTA COUNTY MOUNTAINS AND SOUTHERN CASCADES
ABOVE 3000 FT
CAZ127: BURNEY BASIN
CAZ128: LASSEN VOLCANIC NATIONAL PARK
CAZ129: SIERRA NEVADA OF TEHAMA-BUTTE-PLUMAS COUNTIES BETWEEN
1000-3000 FT
CAZ130: SIERRA NEVADA OF TEHAMA-BUTTE-PLUMAS COUNTIES ABOVE 3000
FT
CAZ131: NORTHERN MOTHERLODE BETWEEN 1000-3000 FT
CAZ132: SIERRA NEVADA OF YUBA-SIERRA-NEVADA-PLACER COUNTIES
BETWEEN 3000-5000 FT INCLUDING INTERSTATE 80
CAZ133: SIERRA NEVADA OF SIERRA-NEVADA-PLACER COUNTIES ABOVE
5000 FT INCLUDING INTERSTATE 80
CAZ134: CENTRAL MOTHERLODE BETWEEN 1000-3000 FT
CAZ135: SIERRA NEVADA OF EL DORADO AND AMADOR COUNTIES BETWEEN
3000-5000 FT INCLUDING HIGHWAY 50
CAZ136: SIERRA NEVADA OF EL DORADO-AMADOR-NORTHERN ALPINE
COUNTIES ABOVE 5000 FT INCLUDING HIGHWAY 50
CAZ137: SOUTHERN MOTHERLODE BETWEEN 1000-3000 FT
CAZ138: SIERRA NEVADA OF CALAVERAS AND TUOLUMNE COUNTIES BETWEEN
3000-5000 FT
CAZ139: SIERRA NEVADA OF CALAVERAS-TUOLUMNE-SOUTHERN ALPINE
COUNTIES ABOVE 5000 FT
CAZ140: TEHAMA COUNTY COAST RANGE ABOVE 3000 FT
CAZ141: WESTERN TEHAMA COUNTY FOOTHILLS BETWEEN 1000-3000 FT
CAZ142: NORTHERN SACRAMENTO VALLEY IN TEHAMA COUNTY
CAZ143: GLENN AND COLUSA COUNTY COAST RANGE ABOVE 3000 FT
CAZ144: CENTRAL GLENN COUNTY INCLUDING INTERSTATE 5
CAZ145: EASTERN GLENN COUNTY
CAZ146: BUTTE COUNTY BELOW 1000 FT
CAZ147: WESTERN GLENN AND COLUSA COUNTY FOOTHILLS BETWEEN
1000-3000 FT
CAZ148: CENTRAL COLUSA COUNTY INCLUDING INTERSTATE 5
CAZ149: EASTERN COLUSA COUNTY
CAZ150: SUTTER AND YUBA COUNTIES BELOW 1000 FT
CAZ151: CAPAY HILLS OF YOLO COUNTY AND VACA HILLS OF SOLANO
COUNTY
CAZ152: WESTERN YOLO COUNTY INCLUDING CAPAY VALLEY AND
INTERSTATE 505
CAZ153: CENTRAL YOLO AND NORTHEAST SOLANO COUNTIES INCLUDING
WOODLAND AND DAVIS
CAZ154: SACRAMENTO METRO AND WESTERN EL DORADO AND AMADOR
COUNTIES
CAZ155: CENTRAL SOLANO COUNTY INCLUDING FAIRFIELD AND VACAVILLE
CAZ156: SOUTHWESTERN SOLANO COUNTY INCLUDING VALLEJO
CAZ157: SACRAMENTO COUNTY DELTA
CAZ158: SAN JOAQUIN COUNTY DELTA
CAZ159: CENTRAL SAN JOAQUIN COUNTY INCLUDING STOCKTON METRO
CAZ160: TRACY TRIANGLE BELOW 1000 FT
CAZ161: NORTHEASTERN SAN JOAQUIN VALLEY BELOW 1000 FT
CAZ162: EASTERN DIABLO RANGE ABOVE 1000 FT
CAZ163: WESTERN STANISLAUS COUNTY BELOW 1000 FT INCLUDING
INTERSTATE 5
CAZ164: CENTRAL STANISLAUS COUNTY INCLUDING MODESTO METRO
TABLE 4. NWS PRODUCTS AFFECTED BY THESE PUBLIC /FIRE WEATHER
FORECAST ZONE CHANGES ARE LISTED BELOW.
PRODUCT NAME WMO HEADING AWIPS ID
------------- ----------- --------
ZONE FORECAST FPUS52 KSTO ZFPSTO
POINT FORECAST MATRICES FOUS52 KSTO PFMSTO
TABULAR STATE FORECAST FPUS62 KSTO SFTSTO
AREA FORECAST DISCUSSION FXUS62 KSTO AFDSTO
PUBLIC INFORMATION STATEMENT NOUS42 KSTO PNSSTO
NON-PRECIPITATION MESSAGE WWUS72 KSTO NPWSTO
FIRE WEATHER FORECAST FNUS52 KSTO FWFSTO
FIRE WEATHER MESSAGE WWUS82 KSTO RFWSTO
FLOOD WATCH WGUS62 KSTO FFASTO
HYDROLOGIC OUTLOOK FGUS72 KSTO ESFSTO
WINTER WEATHER MESSAGE WWUS42 KSTO WSWSTO
SPECIAL WEATHER STATEMENT WWUS86 KSTO SPSSTO
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/FIRE WEATHER FORECAST ZONES
ARE AVAILABLE ONLINE AT:
HTTPS://WWW.WEATHER.GOV/GIS/PUBLICZONES
HTTPS://WWW.WEATHER.GOV/GIS/FIREZONES
HTTPS://WWW.WEATHER.GOV/GIS/COUNTIES
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/STO/ZONECHANGES2026
FOR MORE INFORMATION, PLEASE CONTACT:
COURTNEY CARPENTER
WARNING COORDINATION METEOROLOGIST
NWS SACRAMENTO, CA
COURTNEY.CARPENTER@NOAA.GOV
NATIONAL SERVICE CHANGE NOTICES ARE ONLINE AT:
HTTPS://WWW.WEATHER.GOV/NOTIFICATION/
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