Topanga Warnings, Watches and Advisories

Coastal Flood Advisory issued October 26 at 4:13AM PDT until October 26 at 2:00PM PDT by NWS Eureka CA

* WHAT...High astronomical tides will cause minor flooding in low lying areas around Humboldt Bay. Up to one half foot of saltwater inundation above ground level is possible near shorelines and tidal waterways. Between 8.9 and 9.2 feet MLLW at the North Spit tide gauge is predicted. * WHERE...Northern Coastal Humboldt County. * WHEN...From 10 AM this morning to 2 PM PDT this afternoon. High tide is at 11:58 AM at the Humboldt Bay North Spit tide gauge. Saltwater inundation will be possible 1 to 2 hours before and after high tide. * IMPACTS...Flooding of low lying areas around Humboldt Bay including parks and roads with only isolated closures expected. Flooding will likely impact Jackson Ranch Road in the Arcata Bottoms and several roads in King Salmon.

Coastal Flood Warning issued October 26 at 1:28AM PDT until October 29 at 1:00PM PDT by NWS San Diego CA

* WHAT...Significant coastal flooding expected. * WHERE...San Diego County coastal areas and Orange County Coastal Areas. * WHEN...Until 1 PM PDT Thursday during high tides in the late mornings. * IMPACTS...Numerous roads may be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will occur in the late mornings. * ADDITIONAL DETAILS...Coastal residents and managers of infrastructure in the warned area should prepare for rising water and take appropriate action to protect life and property. High tides each day will occur in the late morning. Observed high tides are 1.5 to 1.7 feet above astronomical tide predictions.

Lake Wind Advisory issued October 26 at 1:23AM PDT until October 26 at 6:00PM PDT by NWS Reno NV

* CHANGES...None. * WHAT...Southwest winds 15 to 25 mph with gusts up to 40 mph for Lake Tahoe, Donner Lake, and Prosser and Boca Reservoirs. Waves 2 to 4 feet on Lake Tahoe. * WHERE...Greater Lake Tahoe Area. * WHEN...Until 6 PM PDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Lake Wind Advisory issued October 26 at 1:23AM PDT until October 26 at 6:00PM PDT by NWS Reno NV

* CHANGES...None. * WHAT...Southwest winds 15 to 20 mph with gusts up to 35 mph for Stampede Reservoir, Lake Davis, Antelope Lake, and Eagle Lake. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...From 10 AM this morning to 6 PM PDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Lake Wind Advisory issued October 26 at 1:23AM PDT until October 26 at 6:00PM PDT by NWS Reno NV

* CHANGES...None. * WHAT...Southwest winds 15 to 20 mph with gusts up to 35 mph for Topaz Lake, Bridgeport Reservoir, Mono Lake, and Crowley Lake. * WHERE...Mono County. * WHEN...From 10 AM this morning to 6 PM PDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Frost Advisory issued October 25 at 9:45PM PDT until October 26 at 9:00AM PDT by NWS Eureka CA

* WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northern Mendocino Interior, Northern Lake, and Western Lake. * WHEN...From 1 AM to 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...There is some uncertainty on how quickly clouds will come in and prevent frost. So this may limit the frost potential, especially in northern Mendocino county.

Coastal Flood Advisory issued October 25 at 8:36PM PDT until October 29 at 3:00PM PDT by NWS San Francisco CA

* WHAT...Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Pacific Coast. * WHEN...From 9 AM Monday to 3 PM PDT Thursday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.6 ft above normal (7.4 ft MLLW) at 11:39 AM Monday 10/26, 1.8 ft above normal (7.6 ft MLLW) at 12:15 PM Tuesday 10/27, 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, and 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29. These predictions include up to 1.0 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

Coastal Flood Advisory issued October 25 at 8:36PM PDT until October 29 at 3:00PM PDT by NWS San Francisco CA

* WHAT...Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bay Shoreline locations of San Pablo Bay, San Francisco Bay, and Monterey Bay. * WHEN...Until 3 PM PDT Thursday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.6 ft above normal (7.4 ft MLLW) at 11:39 AM Monday 10/26, 1.8 ft above normal (7.6 ft MLLW) at 12:15 PM Tuesday 10/27, 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, and 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29. These predictions include up to 1.0 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

Coastal Flood Advisory issued October 25 at 6:12PM PDT until October 29 at 1:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Minor to moderate coastal flooding expected due to very high tides. * WHERE...Catalina and Santa Barbara Islands. * WHEN...From 5 AM Sunday to 1 PM PDT Thursday. * IMPACTS...Minor to moderate flooding of sea water is likely over vulnerable low-lying coastal areas, especially around the time of high tide, including over beach parking lots, bike paths, and harbor walkways. Moderate to significant beach erosion is likely. Isolated damage of structures due to sea water inundation is possible to the most vulnerable areas. * ADDITIONAL DETAILS...High tides will likely reach 7.5-8.0 feet (MLLW) each late morning, which is 1.0 to 1.5 feet above astronomical projections. The highest tides will be Monday through Wednesday. There is a small chance for isolated Coastal Flood Warnings Wednesday through Thursday if larger surf develops.

Coastal Flood Advisory issued October 25 at 6:12PM PDT until October 29 at 1:00PM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Minor to moderate coastal flooding expected due to very high tides. * WHERE...Coastal areas of Los Angeles, Ventura, Santa Barbara, and San Luis Obispo Counties. * WHEN...From 5 AM Sunday to 1 PM PDT Thursday. * IMPACTS...Minor to moderate flooding of sea water is likely over vulnerable low-lying coastal areas, especially around the time of high tide, including over beach parking lots, bike paths, and harbor walkways. Moderate to significant beach erosion is likely. Isolated damage of structures due to sea water inundation is possible to the most vulnerable areas. * ADDITIONAL DETAILS...High tides will likely reach 7.5-8.0 feet (MLLW) each late morning, which is 1.0 to 1.5 feet above astronomical projections. The highest tides will be Monday through Wednesday. There is a small chance for isolated Coastal Flood Warnings Wednesday through Thursday if larger surf develops.

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 Topanga.

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