Diablo, CA Warnings, Watches and Advisories

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 Diablo.

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

Severe Thunderstorm Warning issued April 21 at 3:20PM PDT until April 21 at 4:00PM PDT by NWS Sacramento CA

SVRSTO The National Weather Service in Sacramento has issued a * Severe Thunderstorm Warning for... South central Tehama County in northern California... * Until 400 PM PDT. * At 319 PM PDT, a severe thunderstorm was located over Paskenta, or 17 miles northeast of Alder Springs, and is moving east at 5 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Flournoy, Paskenta, Rancho Tehama Reserve, and Black Butte Summit.

Severe Thunderstorm Warning issued April 21 at 3:19PM PDT until April 21 at 3:45PM PDT by NWS Hanford CA

SVRHNX The National Weather Service in Hanford CA has issued a * Severe Thunderstorm Warning for... Southwestern Madera County in central California... Eastern Merced County in central California... Western Fresno County in central California... * Until 345 PM PDT. * At 319 PM PDT, a severe thunderstorm was located near Firebaugh, or 25 miles west of Madera, moving northeast at 35 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Firebaugh.

Severe Thunderstorm Warning issued April 21 at 3:10PM PDT until April 21 at 4:00PM PDT by NWS Sacramento CA

SVRSTO The National Weather Service in Sacramento has issued a * Severe Thunderstorm Warning for... Central Glenn County in central California... * Until 400 PM PDT. * At 309 PM PDT, a severe thunderstorm was located over Fruto, or near Elk Creek, moving east-northeast at 10 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Fruto and Bluegum.

Special Weather Statement issued April 21 at 3:10PM PDT by NWS Hanford CA

At 310 PM PDT, Doppler radar was tracking a strong thunderstorm 9 miles west of Firebaugh, or 30 miles west of Madera, moving northeast at 25 mph. HAZARD...Wind gusts up to 40 mph and half inch 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... Firebaugh.

Winter Weather Advisory issued April 21 at 1:46PM PDT until April 22 at 5:00PM PDT by NWS Reno NV

* WHAT...Heavy snow above 7000 feet. Additional snow accumulations of 5 to 10 inches above 7000 feet. An additional 2 to 4 inches of snow possible for communities along Highway 395. Southwesterly wind gusts of 40 to 50 mph across lower elevations with gusts up to 60 mph in wind prone locations along US-395. Wind gusts up to 90 mph along ridges. * WHERE...Mono County. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult through Sierra passes. The hazardous conditions could impact today and Wednesday commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...Strong and gusty winds are anticipated today with potentially damaging winds this afternoon. Locally greater snow totals are possible with heavier snow bands. Isolated lightning is also possible along the Sierra crest today and Wednesday afternoons.

Winter Weather Advisory issued April 21 at 1:46PM PDT until April 22 at 5:00PM PDT by NWS Reno NV

* WHAT...Heavy snow above 6500 feet. Additional snow accumulations of 3 to 8 inches above 6500 feet with up to 10 inches along highest mountain peaks. Additional 1 to 3 inches of snow possible at lake level, highest on the western shores. Wind gusts of 30 to 35 mph across lower elevations, including Lake Tahoe where wave heights may reach up to 3 feet. Ridgetop winds gusting up to 90 mph at times. * WHERE...Greater Lake Tahoe Area. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult through Sierra passes. The hazardous conditions could impact the Tuesday and Wednesday commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...Heavier snow bands could result in locally greater snow totals. Isolated lightning is also possible along the Sierra crest today and Wednesday afternoons.

Wind Advisory issued April 21 at 1:34PM MST until April 22 at 8:00AM MST by NWS Phoenix AZ

* WHAT...West winds 30 to 40 mph with gusts up to 55 mph expected. * WHERE...Southwest corner of Imperial County. * WHEN...From 3 PM this afternoon to 8 AM PDT Wednesday. * IMPACTS...Difficult driving conditions, especially for larger vehicles traveling along roads with crosswinds. Light, unsecured objects may become airborne.

Wind Advisory issued April 21 at 1:34PM MST until April 22 at 12:00AM MST by NWS Phoenix AZ

* WHAT...West winds 25 to 35 mph with gusts up to 45 mph expected. * WHERE...Western portion of Joshua Tree National Park. * WHEN...From 3 PM this afternoon to midnight PDT tonight. * IMPACTS...Difficult driving conditions, especially for larger vehicles traveling along roads with crosswinds. Light, unsecured objects may become airborne.

Flood Advisory issued April 21 at 1:28PM PDT until April 21 at 7:30PM PDT by NWS Sacramento CA

* WHAT...Urban and small stream flooding caused by thunderstorms. * WHERE...Portions of central and northern California, including the following counties, Placer, Amador, Calaveras, El Dorado, Nevada, Sacramento, San Joaquin, Stanislaus, Sutter, Tuolumne and Yolo. * WHEN...Until 730 PM PDT Tuesday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry arroyos. Water over roadways. * ADDITIONAL DETAILS... - At 124 PM PDT, Doppler radar and rain gauges indicated heavy rain due to thunderstorms. Local emergency managers reported flooding. Minor flooding is ongoing or expected to begin shortly in the advisory area. Potential for isolated mud or rock slides in the foothills as the line of storms moves eastward. Between 0.5 and 1 inch of rain has fallen in the last 6 hours. - Some locations that will experience flooding include... Sacramento, Stockton, Modesto, Elk Grove, Roseville, Citrus Heights, Tracy, Folsom, Rocklin, Galt, Oakdale, Auburn, Placerville, Sonora, Jackson, Paloma, El Dorado Hills, Fair Oaks, Cameron Park and Carmichael. - http://www.weather.gov/safety/flood

Air Quality Alert issued April 21 at 12:26PM PDT by NWS San Diego CA

* WHAT...The South Coast AQMD has extended an air quality alert due to harmful levels of particle pollution from windblown dust. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels. * WHERE...in the Coachella Valley and San Gorgonio Pass Near Banning. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...until 11:59 PM Wednesday . * IMPACTS... Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of lung infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.

Wind Advisory issued April 21 at 11:14AM PDT until April 22 at 7:00AM PDT by NWS Hanford CA

* WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Indian Wells Valley and Mojave Desert. * WHEN...Until 7 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Wind Advisory issued April 21 at 11:14AM PDT until April 22 at 8:00PM PDT by NWS Hanford CA

* WHAT...West winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Mojave Desert Slopes. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Winter Storm Warning issued April 21 at 11:02AM PDT until April 22 at 5:00PM PDT by NWS Sacramento CA

* WHAT...Heavy snow. Additional snow accumulations of up to 6 to 12 inches above 5000 feet, with up to 18 inches at the highest peaks. Minor accumulations of up to 2 inches possible down to 4500 feet. Southwest winds could gust as high as 50 mph. * WHERE...Northern Sierra Nevada and southern Cascades above 5000 feet, including Highway 50, Interstate 80 and Lassen Volcanic National Park. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday and Wednesday commutes. * ADDITIONAL DETAILS...Snow levels 5500 to 6500 feet today, lowering to 4500 to 5500 feet by early Wednesday. Locally lower snow levels possible in heavier convective showers. Heaviest snowfall expected this afternoon and evening with snowfall rates of 1 to 2 inches per hour at times.

Winter Storm Warning issued April 21 at 10:45AM PDT until April 22 at 5:00PM PDT by NWS Hanford CA

* WHAT...Heavy snow expected. Total snow accumulations 3 to 5 inches above 7,000 feet, with 12 to 18 inches possible at the highest elevations of the Sierra Nevada. Wind gusts as high as 75 mph along the Sierra crest expected. * WHERE...Kaiser to Rodgers Ridge, Kings Canyon NP, Sequoia NP, Upper San Joaquin River, and Yosemite NP outside of the valley. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes. Strong winds could cause tree damage.

Wind Advisory issued April 21 at 10:30AM PDT until April 22 at 7:00AM PDT by NWS San Diego CA

* WHAT...West winds 20 to 30 mph with gusts 45 to 55 mph expected. * WHERE...Apple and Lucerne Valleys and San Diego County Deserts. * WHEN...From 2 PM this afternoon to 7 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Wind Advisory issued April 21 at 10:30AM PDT until April 22 at 7:00AM PDT by NWS San Diego CA

* WHAT...West winds 25 to 35 mph with gusts 50 to 60 mph expected. * WHERE...San Gorgonio Pass near Banning. * WHEN...From 2 PM this afternoon to 7 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Wind Advisory issued April 21 at 10:30AM PDT until April 22 at 7:00AM PDT by NWS San Diego CA

* WHAT...Southwest winds 25 to 35 mph with gusts 50 to 65 mph expected. * WHERE...San Bernardino County Mountains. * WHEN...From 2 PM this afternoon to 7 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Wind Advisory issued April 21 at 10:30AM PDT until April 22 at 7:00AM PDT by NWS San Diego CA

* WHAT...West winds 20 to 30 mph with gusts 50 to 60 mph expected. * WHERE...Riverside County Mountains and San Diego County Mountains. * WHEN...From 2 PM this afternoon to 7 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

High Wind Warning issued April 21 at 10:28AM PDT until April 21 at 11:00PM PDT by NWS Las Vegas NV

* WHAT...South winds 30 to 40 mph with gusts up to 60 mph possible. * WHERE...In California, Death Valley National Park. In Nevada, Esmeralda and Central Nye County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high-profile vehicles. Areas of blowing dust will likely cause reduced visibility.

Wind Advisory issued April 21 at 10:28AM PDT until April 21 at 11:00PM PDT by NWS Las Vegas NV

* WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada. * WHEN...From 2 PM PDT /2 PM MST/ this afternoon to 11 PM PDT /11 PM MST/ this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Areas of blowing dust will likely cause reduced visibility.

Wind Advisory issued April 21 at 10:28AM PDT until April 21 at 11:00PM PDT by NWS Las Vegas NV

* WHAT...South winds 25 to 35 mph with gusts up to 50 mph. * WHERE...White and Inyo Mountains, Eastern Sierra Slopes, Owens Valley South, Owens Valley North, and Lincoln County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Areas of blowing dust will likely cause reduced visibility.

Wind Advisory issued April 21 at 10:00AM PDT until April 21 at 5:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Ventura County Mountains. * WHEN...Until 5 PM PDT this afternoon. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Wind Advisory issued April 21 at 10:00AM PDT until April 21 at 10:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Southwest winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Antelope Valley, Eastern Antelope Valley Foothills, Eastern San Gabriel Mountains, Interstate 5 Corridor, Western Antelope Valley Foothills, and Western San Gabriel Mountains and Highway 14 Corridor. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

The Winter Storm Watch has been replaced. Please see the latest information from NWS Reno NV on this developing situation.

The Winter Storm Watch has been replaced. Please see the latest information from NWS Reno NV on this developing situation.

The Winter Storm Watch has been replaced. Please see the latest information from NWS Reno NV on this developing situation.

The Winter Storm Watch has been replaced. Please see the latest information from NWS Reno NV on this developing situation.

Air Quality Alert issued April 20 at 9:40AM MST by NWS Phoenix AZ

* WHAT...The Imperial County APCD has issued an air quality alert due to harmful levels of particle pollution from windblown dust. Visit https://www.aqmd.gov/alertinfo to check current and forecasted air quality levels. * WHERE...In the Imperial Valley. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...noon to midnight Tuesday, April 21, 2026. * IMPACTS... Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of lung infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.