Running Springs 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 Running Springs.

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

Hydrologic Outlook issued December 11 at 3:43PM PST by NWS San Francisco CA

ESFMTR * WHAT...A series of storms over the next week will bring periods of light to moderate rainfall to the region. The first in the series of storms is a shortwave trough that will move into the North Bay this evening and slide south across the region tonight into Thursday. Confidence has increased significantly with this system and it is expected to bring light rain across the North Bay and the San Francisco Bay Area. The higher elevations of the North Bay will likely see around a half an inch of precipitation while North Bay valleys see around a quarter of an inch. Bay Area locations south of the Golden Gate, including the Santa Cruz Mountains, will see a tenth to a quarter of an inch. Less than a tenth of an inch of rain is forecast across the Central Coast. A stronger, more significant rainfall event is anticipated to impact the region Friday and Saturday. The Weather Prediction Center Day 3 and Day 4 Excessive Rainfall Outlook has the North Bay and a portion of the Bay Area in a Marginal (at least 5%) chance of exceeding flash flood guidance for this time period. This second system is significantly stronger low pressure system accompanied by a moderately strong cold front. The latest model guidance depicts rainfall beginning Friday evening in the North Bay and progressing southward across the Bay Area and Central Coast overnight into Saturday. While we expect these totals to change a bit, current solutions bring 3 to 5 inches of precipitation to the North Bay coastal range and 1 to 2.5 inches to the North Bay Valleys, 0.5 to 1 inch in the Bay Area, and Monterey Bay region, 1 to 2 inches across the Santa Cruz and Santa Lucia mountain range, and a trace to 0.25 inch over the interior portions of Monterey and San Benito counties. Unsettled wet weather will continue Sunday and into next week. Area streams and creeks will only see a slight to moderate rise with the first storm, and while streams are expected to stay below action/monitor stage with this storm it will prime the soils for quicker and more noteworthy rises with subsequent storms. The second stronger and wetter storm will result in greater and more rapid rises on small creeks, streams and rivers. Main stem rivers forecasts continue to stay below flood stage, however the exceedance probabilities (of rising above flood stage) have increased over the last 24 hours across Sonoma County with the Russian River at Guerneville - GUEC1 increasing to 20% (up from 10%). Napa County has seen minor fluctuations and the probability of exceedance remains low. SHEC1- Napa near Saint Helena (9%), and APCC1- Napa near Napa (5%) for Saturday. A few other rivers to keep an eye on that show higher probability of reaching Action/Monitor or Minor flood stage according to the latest CNRFC forecast are MWEC1 - Mark West Creek at Mirabel Heights now has a 77% probability of reaching Action/Monitor Stage (up from 70%) and a 57% probability of reaching Minor flood stage (up from 45%) on Saturday. CTIC1 - Laguna De Santa Rosa at Stony Pt Rd near Cotati has a 86% probability of reaching Action/Monitor Stage (up from 64%) and a 55% probability of reaching Minor flood stage (up from 41%) on Saturday. GEYC1 - Russian River at Geyserville has a 41% probability of reaching Action/Monitor Stage (up from 27%) and a 25% probability of reaching Minor flood stage (up from 14%) on Saturday. * WHERE...Sonoma and Napa Counties. Latest model guidance suggests the North Bay will receive the greatest accumulation of precipitation with the heaviest rainfall expected over the North Bay coastal range and mountains. * WHEN...Friday through Sunday. Light to Moderate rainfall expected over the North Bay Friday and Saturday. The heaviest rainfall accumulation is expected Friday and Saturday. Unsettled wet weather will continue Sunday into next week. * ADDITIONAL DETAILS...In addition to the moderate rainfall and localized ponding of water in low-lying or poorly drained areas, such as freeway offramps. Locally strong and gusty winds may result in downed trees, and potential power outages. Confidence is high that we will receive rainfall from this system however, confidence is moderate with respect to the exact location and timing of the most intense rainfall. Details regarding this storm will likely change as the system nears. Therefore, stay tuned to the latest forecast for the most up to date weather information.

Beach Hazards Statement issued December 11 at 2:28PM PST until December 15 at 4:00PM PST by NWS Los Angeles/Oxnard CA

* WHAT...Dangerous rip currents and breaking waves due to elevated surf of 4 to 6 feet expected. Very minor tidal overflow and coastal flooding. * WHERE...Santa Barbara County Southwestern Coast, Santa Barbara County Southeastern Coast, Malibu Coast, and Los Angeles County Beaches. * WHEN...From Thursday afternoon through Sunday afternoon. * IMPACTS...There is an increased risk of ocean drowning. Rip currents can pull swimmers and surfers out to sea. Waves can wash people off beaches and rocks, and capsize small boats nearshore. In addition, astronomical tides will be running high, around 7 feet. And with the elevated surf, very minor tidal overflow and coastal flooding will be possible for west and northwest- facing beaches within a couple hours of morning high tides, which will progress from around 7AM PST Friday to between 8AM and 9AM PST by Sunday.

High Surf Advisory issued December 11 at 2:28PM PST until December 15 at 4:00PM PST by NWS Los Angeles/Oxnard CA

* WHAT...Large breaking waves of 10 to 13 feet with dangerous rip currents. Very minor tidal overflow and coastal flooding. * WHERE...San Luis Obispo County Beaches, Santa Barbara County Central Coast Beaches, and Ventura County Beaches. * WHEN...From 4 PM Thursday to 4 PM PST Sunday. * IMPACTS...There is an increased risk for ocean drowning. Rip currents can pull swimmers and surfers out to sea. Large breaking waves can cause injury, wash people off beaches and rocks, and capsize small boats near shore. In addition, astronomical tides will be running high, around 7 feet. And with the high surf, very minor tidal overflow and coastal flooding will be possible for west and northwest-facing beaches within a couple hours of morning high tides, which will progress from around 7AM PST Friday to between 8AM and 9AM PST by Sunday.

Winter Weather Advisory issued December 11 at 2:17PM PST until December 12 at 10:00AM PST by NWS Eureka CA

* WHAT...For the advisory, snow expected. Total snow accumulations between 2 and 4 inches. More in high mountain locations. For the Watch, heavy snow above 3000 feet. Total accumulation of 10 to 20 inches around Scott Mountain Pass. 1 to 4 inches of wet snow at lower elevations closer to 3000 feet. * WHERE...Northern Trinity above 3000 feet. * WHEN...For the Winter Weather Advisory, from 6 PM this evening to 10 AM PST Thursday. For the Winter Storm Watch, from late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...This is expected to impact Highway at Hayfork Summit and at multiple areas north of Weaverville. This is expected to impact Buckhorn Summit on Hwy 299.

Winter Storm Watch issued December 11 at 2:17PM PST until December 14 at 4:00PM PST by NWS Eureka CA

* WHAT...For the advisory, snow expected. Total snow accumulations between 2 and 4 inches. More in high mountain locations. For the Watch, heavy snow above 3000 feet. Total accumulation of 10 to 20 inches around Scott Mountain Pass. 1 to 4 inches of wet snow at lower elevations closer to 3000 feet. * WHERE...Northern Trinity above 3000 feet. * WHEN...For the Winter Weather Advisory, from 6 PM this evening to 10 AM PST Thursday. For the Winter Storm Watch, from late Thursday night through Saturday afternoon. * IMPACTS...Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...This is expected to impact Highway at Hayfork Summit and at multiple areas north of Weaverville. This is expected to impact Buckhorn Summit on Hwy 299.

High Surf Advisory issued December 11 at 1:54PM PST until December 13 at 4:00AM PST by NWS San Francisco CA

* WHAT...For the Coastal Flood Advisory, minor coastal flooding expected. For the High Surf Advisory, large breaking waves of 18 to 22 feet expected. * WHERE...For the Coastal Flood Advisory, bayshore along the San Francisco Bay and San Pablo Bay. For the High Surf Advisory, northwest and west facing beaches. * WHEN...For the Coastal Flood Advisory, from 6 AM Thursday to 1 PM PST Monday. For the High Surf Advisory, from 1 PM Thursday to 4 AM PST Friday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous swimming and surfing conditions and localized beach erosion. * ADDITIONAL DETAILS...For the High Surf Advisory, long period northwesterly swell will result in an increasing risk of sneaker waves, rip currents, and longshore currents with breaking waves between 18 and 22 feet. For the Coastal Flood Advisory, tidal levels are increasing as a result of higher astronomical tides. Low lying areas within the San Francisco Bay Area may see minor flooding as a result during high tide. San Francisco highest tides are 6.74 ft at 8:12 am Thursday, 6.98 ft at 8:54 am Friday, 7.07 ft at 9:37 am Saturday, 7.02 ft at 10:22 am Sunday, and 6.82 ft at 11:08 am Monday.

High Surf Advisory issued December 11 at 1:54PM PST until December 13 at 4:00AM PST by NWS San Francisco CA

* WHAT...Large breaking waves of 18 to 22 feet expected. * WHERE...Northwest and west facing beaches. * WHEN...From 1 PM Thursday to 4 AM PST Friday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. * ADDITIONAL DETAILS...Long period northwesterly swell will result in an increasing risk of sneaker waves, rip currents, and longshore currents with breaking waves between 18 and 22 feet expected.

Coastal Flood Advisory issued December 11 at 1:54PM PST until December 16 at 1:00PM PST by NWS San Francisco CA

* WHAT...For the Coastal Flood Advisory, minor coastal flooding expected. For the High Surf Advisory, large breaking waves of 18 to 22 feet expected. * WHERE...For the Coastal Flood Advisory, bayshore along the San Francisco Bay and San Pablo Bay. For the High Surf Advisory, northwest and west facing beaches. * WHEN...For the Coastal Flood Advisory, from 6 AM Thursday to 1 PM PST Monday. For the High Surf Advisory, from 1 PM Thursday to 4 AM PST Friday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Dangerous swimming and surfing conditions and localized beach erosion. * ADDITIONAL DETAILS...For the High Surf Advisory, long period northwesterly swell will result in an increasing risk of sneaker waves, rip currents, and longshore currents with breaking waves between 18 and 22 feet. For the Coastal Flood Advisory, tidal levels are increasing as a result of higher astronomical tides. Low lying areas within the San Francisco Bay Area may see minor flooding as a result during high tide. San Francisco highest tides are 6.74 ft at 8:12 am Thursday, 6.98 ft at 8:54 am Friday, 7.07 ft at 9:37 am Saturday, 7.02 ft at 10:22 am Sunday, and 6.82 ft at 11:08 am Monday.

Coastal Flood Advisory issued December 11 at 1:54PM PST until December 16 at 1:00PM PST by NWS San Francisco CA

* WHAT...Minor coastal flooding expected. * WHERE...Bayshore along the San Francisco Bay and San Pablo Bay. * WHEN...From 6 AM Thursday to 1 PM PST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. * ADDITIONAL DETAILS...Tidal levels are increasing as a result of higher astronomical tides. Low lying areas within the San Francisco Bay Area may see minor flooding as a result during high tide. San Francisco highest tides are 6.74 ft at 8:12 am Thursday, 6.98 ft at 8:54 am Friday, 7.07 ft at 9:37 am Saturday, 7.02 ft at 10:22 am Sunday, and 6.82 ft at 11:08 am Monday.

Winter Weather Advisory issued December 11 at 1:38PM PST until December 12 at 4:00PM PST by NWS Reno NV

* WHAT...Snow. Snow accumulations of 1 to 4 inches at lake level with 4 to 8 inches above 7000 feet. Up to 10 inches locally on highest peaks. Ridge winds gusting as high as 90 mph. Southwest winds 10 to 15 mph with gusts up to 30 mph and wave heights of 1 to 3 feet on Lake Tahoe. * WHERE...Greater Lake Tahoe Area. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning commute. Very strong winds could cause extensive damage to trees and power lines.

Winter Weather Advisory issued December 11 at 1:38PM PST until December 12 at 4:00PM PST by NWS Reno NV

* WHAT...Snow. Snow accumulations of 1 to 4 inches with up to 6 inches west of Highway 395. Up to 10 inches locally on highest peaks. Ridge winds gusting as high as 50 mph. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday morning commute.

Winter Weather Advisory issued December 11 at 1:38PM PST until December 12 at 4:00PM PST by NWS Reno NV

* WHAT...Snow. Snow accumulations of 1 to 4 inches above 7000 feet with 4 to 8 inches on the Sierra crest. Ridge winds gusting as high 80 mph. * WHERE...Mono County. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning commute. Strong winds could cause damage to trees and power lines.

Winter Storm Watch issued December 11 at 1:21PM PST until December 14 at 4:00PM PST by NWS Medford OR

* WHAT...Heavy snow possible. Total snow accumulations between 1 to 2 feet, with local amounts up to 28 inches possible. * WHERE...North Central and Southeast Siskiyou County, South Central Siskiyou County, and Western Siskiyou County Counties. This includes Dunsmuir, McCloud, Mount Shasta City, Sawyers Bar road west of Etna, Interstate 5, and highway 89. * WHEN...From Friday afternoon through Saturday afternoon. * IMPACTS...The weight of snow on tree limbs may down power lines and could cause sporadic power outages. Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening commute.

Beach Hazards Statement issued December 11 at 1:18PM PST until December 13 at 10:00AM PST by NWS San Diego CA

* WHAT...Minor tidal overflow expected. * WHERE...San Diego County Coastal Areas and Orange County Coastal Areas. * WHEN...From late tonight through Friday morning. * IMPACTS...Low lying locations, including parking lots, could have minor tidal overflow during astronomical high tides of around 6 to 7 feet. This includes Imperial Beach, La Jolla Shores, Del Mar and Cardiff in San Diego COunty, and Newport Beach, Sunset Beach and Seal Beach in Orange County. * ADDITIONAL DETAILS... Newport Beach - Thursday: 6.4 feet at 607 AM. La Jolla - Thursday: 6.3 feet at 604 AM. Newport Beach - Friday: 6.7 feet at 647 AM. La Jolla - Friday: 6.6 feet at 644 AM.

Wind Advisory issued December 11 at 1:15PM PST until December 13 at 12:00AM PST by NWS San Diego CA

* WHAT...A weather system will bring west winds at speeds of 20 to 30 mph with localized gusts up to 60 mph expected along the desert slopes and mountain passes during Thursday afternoon and evening. * WHERE...Apple and Lucerne Valleys, Coachella Valley, Riverside County Mountains, San Bernardino County Mountains, San Diego County Deserts, San Diego County Mountains, and San Gorgonio Pass Near Banning. * WHEN...From 1 PM Thursday to midnight PST Thursday Night. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Wind blown dust could reduce visibility.

Wind Advisory issued December 11 at 12:55PM PST until December 12 at 4:00AM PST by NWS Medford OR

* WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected through tonight. South winds 30 to 40 mph with gusts up to 55 mph are possible Friday into Saturday. * WHERE...Portions of the Shasta Valley, including Interstate 5 from Weed to Grenada. * WHEN...For the Wind Advisory, from 7 PM this evening to 4 AM PST Thursday. For the High Wind Watch, from Friday morning through Saturday morning. * IMPACTS...Damaging winds could blow down trees and power lines, and may damage unsecured property. Power outages are possible. Travel could be difficult, especially for high profile vehicles.

High Wind Watch issued December 11 at 12:55PM PST until December 14 at 7:00AM PST by NWS Medford OR

* WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected through tonight. South winds 30 to 40 mph with gusts up to 55 mph are possible Friday into Saturday. * WHERE...Portions of the Shasta Valley, including Interstate 5 from Weed to Grenada. * WHEN...For the Wind Advisory, from 7 PM this evening to 4 AM PST Thursday. For the High Wind Watch, from Friday morning through Saturday morning. * IMPACTS...Damaging winds could blow down trees and power lines, and may damage unsecured property. Power outages are possible. Travel could be difficult, especially for high profile vehicles.

Winter Weather Advisory issued December 11 at 12:48PM PST until December 12 at 4:00PM PST by NWS Hanford CA

* WHAT...Snow expected. Total snow accumulations between 6 and 10 inches above 6,000 feet. Winds gusting as high as 40 mph. * WHERE...Grant Grove Area, Kaiser to Rodgers Ridge, Kings Canyon NP, and Sequoia NP. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning commute.

Winter Weather Advisory issued December 11 at 12:48PM PST until December 12 at 4:00PM PST by NWS Hanford CA

* WHAT...Snow expected. Total snow accumulations between 6 and 10 inches above 6,000 feet. Winds gusting as high as 40 mph. * WHERE...Upper San Joaquin River and Yosemite NP outside of the valley. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning commute. Gusty winds could bring down tree branches.

Winter Weather Advisory issued December 11 at 12:46PM PST until December 12 at 4:00PM PST by NWS Sacramento CA

* WHAT...Snow expected. Total snow accumulations between 4 and 8 inches above 3500 feet, locally higher over peaks. Winds gusting as high as 35 mph. * WHERE...Shasta Lake Area / Northern Shasta County County. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel will be difficult at times from falling snow and slick travel conditions. These hazardous conditions are expected to impact the Thursday morning commute. * ADDITIONAL DETAILS...Heaviest snow is expected overnight into Thursday morning. Renewed mountain snowfall chances are expected through the weekend and into early next week as additional weather systems move through the region.

Winter Weather Advisory issued December 11 at 12:46PM PST until December 12 at 4:00PM PST by NWS Sacramento CA

* WHAT...Snow expected. Total snow accumulations between 6 and 12 inches above 5000 feet, locally higher over peaks. Winds gusting as high as 40 mph. * WHERE...Burney Basin / Eastern Shasta County, West Slope Northern Sierra Nevada, and Western Plumas County/Lassen Park Counties. * WHEN...From 10 PM this evening to 4 PM PST Thursday. * IMPACTS...Travel will be difficult at times from falling snow and slick travel conditions. These hazardous conditions are expected to impact the Thursday morning commute. * ADDITIONAL DETAILS...Heaviest snow is expected Thursday morning. Renewed mountain snowfall chances are expected through the weekend and into early next week as additional weather systems move through the region.

Air Quality Alert issued December 11 at 11:23AM PST by NWS Los Angeles/Oxnard CA

The South Coast AQMD has extended an air quality alert due to increased fine particle pollution from wildfire smoke in the region. The air quality alert is in effect until Thursday at 7 PM. If you smell smoke or see ash due to a wildfire, remain indoors with windows and doors closed or seek alternative shelter, if feasible. Avoid vigorous physical activity and run your air conditioner and/or an air purifier. If possible, do not use whole house fans or swamp coolers that bring in outside air. Avoid burning wood in your fireplace or firepit and minimize sources of indoor air pollution such as candles, incense, pan-frying, and grilling. If you must be outdoors, keep the time brief and wear a tightly-fitted N-95 or P-100 respirator to help reduce exposure. Limit the use of gasoline powered lawn and garden equipment. Exposure to particle pollution can cause serious health problems, aggravate lung disease, cause asthma attacks and acute bronchitis, and increase risk of respiratory infections. People with heart or lung diseases should follow their doctor's advice for dealing with episodes of unhealthy air quality. Additionally, people with respiratory or heart disease, older adults, and children are particularly susceptible and should avoid prolonged exposure, strenuous activities or heavy exertion as conditions dictate. Levels of particle pollution can vary hour by hour and by location depending on fire behavior and local weather conditions. To view current and forecasted air quality levels, visit the South Coast Air Quality Management District website at aqmd.gov or download the mobile app at www.aqmd.gov/mobileapp. Additional details for this air quality alert may be available at www.aqmd.gov/advisory.