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Mission Viejo Warnings, Watches and Advisories

NWS Active Alerts for CA - Map View

State: CA Total alerts: 4 Updated: Sep 21, 2026 3:43pm PDT

Flood Advisory

Area
Inyo, CA
Flood Advisory issued September 21 at 3:35PM PDT until September 21 at 7:30PM PDT by NWS Las Vegas NV

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Central Inyo County in south central California... * WHEN...Until 730 PM PDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry arroyos. * ADDITIONAL DETAILS... - At 335 PM PDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. - Some locations that will experience flooding include... Scotty's Castle Road and Saline Valley Road. - http://www.weather.gov/safety/flood

Special Weather Statement

Area
Mariposa-Madera Lower Sierra; Yosemite NP outside of the valley; Upper San Joaquin River
Special Weather Statement issued September 21 at 3:30PM PDT by NWS Hanford CA

At 329 PM PDT, Doppler radar was tracking a strong thunderstorm near Yosemite South Entrance, moving southwest at 15 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Yosemite South Entrance, Chilkoot Meadow, Fish Camp, Poison Ridge, Buck Camp Ranger Station, and Mariposa Grove.

Severe Thunderstorm Warning

Area
Plumas, CA; Sierra, CA
Severe Thunderstorm Warning issued September 21 at 3:29PM PDT until September 21 at 4:15PM PDT by NWS Sacramento CA

SVRSTO The National Weather Service in Sacramento has issued a * Severe Thunderstorm Warning for... Southern Plumas County in northern California... Western Sierra County in northern California... * Until 415 PM PDT. * At 329 PM PDT, a severe thunderstorm was located 7 miles southeast of Gibsonville, or 9 miles north of Downieville, moving south at 5 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Downieville, Gibsonville, Little Grass Valley and La Porte.

Lake Wind Advisory

Area
West Side Mountains north of 198
Lake Wind Advisory issued September 21 at 2:33PM PDT until September 22 at 5:00AM PDT by NWS Hanford CA

* WHAT...West winds 10 to 20 mph with gusts up to 35 mph. * WHERE...West Side Mountains north of 198, including San Luis Reservoir. * WHEN...Until 5 AM PDT Tuesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

SAFETY and DATA MESSAGE

When a severe thunderstorm warning is issued, the storm may produce damaging winds, large hail, dangerous lightning, and heavy rain. In some cases, heavy rainfall produced by a severe storm can also lead to flash flooding. Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Mission Viejo.

Use the Radar Maps link provided to understand the trajectory of a storm.

For more official information about severe storms and how to stay safe, visit the National Weather Service's Severe Thunderstorm Safety page. We encourage you to also monitor Excessive Rainfall Forecasts on their Weather Prediction Center website.

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