Los Angeles and Southern California

Fourteen regions on NWS forecast zones: LA Basin, Santa Monica Mtns, San Fernando Valley, San Gabriel Valley, Santa Clarita Valley, San Gabriel Mountains, Antelope Valley, Ventura County, Ventura mountains, Orange County, Inland Empire, Inland mountains, High Desert and Coachella Valley.

In the editor each region takes a level with one click. When one region needs more detail, split it into its zones and set them one by one; merge it back when they agree.

Regions in this starter map

• LA Basin4 zonesLos Angeles County Beaches · Palos Verdes Hills · Los Angeles County Inland Coast including Downtown Los Angeles · Catalina and Santa Barbara Islands
• Santa Monica Mtns4 zonesMalibu Coast · Western Santa Monica Mountains Recreational Area · Eastern Santa Monica Mountains Recreational Area · Calabasas and Agoura Hills
• San Fernando Valley2 zonesWestern San Fernando Valley · Eastern San Fernando Valley
• San Gabriel Valley1 zoneLos Angeles County San Gabriel Valley
• Santa Clarita Valley2 zonesSanta Clarita Valley · Interstate 5 Corridor
• San Gabriel Mountains2 zonesWestern San Gabriel Mountains and Highway 14 Corridor · Eastern San Gabriel Mountains
• Antelope Valley3 zonesWestern Antelope Valley Foothills · Eastern Antelope Valley Foothills · Antelope Valley
• Ventura County4 zonesVentura County Beaches · Ventura County Inland Coast · Central Ventura County Valleys · Southeastern Ventura County Valleys
• Ventura mountains5 zonesLake Casitas · Ojai Valley · Santa Susana Mountains · Southern Ventura County Mountains · Northern Ventura County Mountains
• Orange County3 zonesOrange County Coastal · Orange County Inland · Santa Ana Mountains and Foothills
• Inland Empire1 zoneSan Bernardino and Riverside County Valleys-The Inland Empire
• Inland mountains3 zonesSan Bernardino County Mountains · Riverside County Mountains · San Gorgonio Pass Near Banning
• High Desert2 zonesApple and Lucerne Valleys · Western Mojave Desert
• Coachella Valley1 zoneCoachella Valley

Forecast zones from the National Weather Service, coastline from Natural Earth.