|City of license||Santa Ana, California|
|Broadcast area||Greater Los Angeles Area and Orange County|
|Branding||NOAA All Hazards Radio|
|Slogan||The Voice Of The National Weather Service|
|Owner||NOAA/National Weather Service|
WWG21 (sometimes referred to as Santa Ana All Hazards) is a NOAA Weather Radio station that is programmed from the National Weather Service forecast office in San Diego, California with its transmitter located in the Santa Ana Mountains. Although the directional signal serves much of the Greater Los Angeles Area and the Pacific Coast Line, it broadcasts weather and hazard information for Orange, Riverside, and San Bernardino Counties.
WWG21 issues forecasts for the Orange County Coast, Inland Empire, San Bernardino and Riverside County mountains, Santa Ana mountains and the Apple and Lucerne Valleys of San Bernardino County. It also programs marine forecasts for the coastal waters from Point Mugu to San Mateo Point and westward 60 nautical miles, and during the morning transmits climate summaries for Fullerton, Riverside and Santa Ana.
Weather conditions are updated at 10 minutes past each hour and covers primarily Santa Ana, Fullerton, Los Alamitos, Riverside, Ontario, San Bernardino, Los Angeles Airport, San Diego, Victorville, Las Vegas, Phoenix and Avalon Airport with regional roundup at nearby cities. Coastal weather observations are also updated hourly.
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