Hillsborough, 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 Hillsborough.

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

Wind Advisory issued April 15 at 5:38PM PDT until April 17 at 11:00AM PDT by NWS Hanford CA

* WHAT...Northwest winds 15 to 25 mph with gusts up to 45 mph expected. * WHERE...Indian Wells Valley and Mojave Desert. * WHEN...From 11 AM Thursday to 11 AM PDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to, State Routes 14, 58, 178, and U.S. 395.

Wind Advisory issued April 15 at 5:38PM PDT until April 17 at 11:00AM PDT by NWS Hanford CA

* WHAT...Northwest winds 20 to 30 mph with gusts up to 55 mph expected. * WHERE...Mojave Desert Slopes. * WHEN...Until 11 AM PDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to, State Routes 14, 58, 178, and U.S. 395.

Air Quality Alert issued April 15 at 5:21PM 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...Imperial County. Levels of particle pollution can vary by time and location depending on emissions and local weather conditions. * WHEN...11 AM Thu Apr 16 to 5 PM Fri Apr 17. * 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 15 at 3:09PM PDT until April 17 at 5:00PM PDT by NWS Las Vegas NV

* WHAT...Thursday, south-southwest winds 15 to 25 mph with gusts up to 40 mph expected. Thursday night through Friday, north winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...Lake Mead National Recreation Area, Lake Havasu and Fort Mohave, and San Bernardino County-Upper Colorado River Valley. * WHEN...From 11 AM PDT /11 AM MST/ Thursday to 5 PM PDT /5 PM MST/ Friday. * IMPACTS...Winds this strong can make driving difficult, especially for high-profile vehicles, particularly along east-west thoroughfares including Interstate 40. Strong winds will elevate wave heights on Lake Mead, Lake Mohave, and Lake Havasu to between 2 and 4 feet, making boating dangerous, especially for small craft. * ADDITIONAL DETAILS...Isolated gusts to 60 mph are possible near Laughlin, Bullhead City, and Katherine Landing. These gusts are expected to be isolated in space and time.

Wind Advisory issued April 15 at 3:09PM PDT until April 17 at 11:00AM PDT by NWS Las Vegas NV

* WHAT...Thursday, southwest winds 15 to 25 mph with gusts up to 40 mph expected. Thursday night and Friday, north-northwest winds 15 to 25 mph with gusts up to 45 mph expected. * WHERE...In Arizona, Northwest Deserts. In California, Cadiz Basin, Eastern Mojave Desert, Morongo Basin, and Western Mojave Desert. In Nevada, Southern Clark County. * WHEN...From 11 AM PDT /11 AM MST/ Thursday to 11 AM PDT /11 AM MST/ Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Winds this strong can make driving difficult, especially for high-profile vehicles, particularly along east-west thoroughfares including Interstate 15 and Interstate 40.

Wind Advisory issued April 15 at 3:09PM PDT until April 17 at 5:00AM PDT by NWS Las Vegas NV

* WHAT...Thursday, southwest winds 15 to 25 mph with gusts up to 40 mph expected. Thursday night and Friday, north-northwest winds 15 to 25 mph with gusts up to 45 mph expected. * WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada. * WHEN...From 11 AM PDT /11 AM MST/ Thursday to 5 AM PDT /5 AM MST/ Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Winds this strong can make driving difficult, especially for high-profile vehicles, particularly along east-west thoroughfares including Interstate 15 and Interstate 40.

Frost Advisory issued April 15 at 2:55PM PDT until April 16 at 9:00AM PDT by NWS Eureka CA

* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Southwestern Mendocino Interior. * WHEN...From midnight tonight to 9 AM PDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Freeze Warning issued April 15 at 2:55PM PDT until April 16 at 9:00AM PDT by NWS Eureka CA

* WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Trinity County, Lake County, Humboldt Interior, Northern Mendocino Interior, Del Norte Interior, and Southeastern Mendocino Interior. * WHEN...From midnight tonight to 9 AM PDT Thursday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Frost Advisory issued April 15 at 2:55PM PDT until April 16 at 9:00AM PDT by NWS Eureka CA

* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Del Norte, Humboldt, and Mendocino Coast. * WHEN...From midnight tonight to 9 AM PDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Wind Advisory issued April 15 at 12:36PM PDT until April 16 at 9:00AM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Northwest winds 25 to 35 mph with gusts up to 45 mph expected. * WHERE...Interstate 5 Corridor and Western Antelope Valley Foothills. * WHEN...From 2 AM to 9 AM PDT Thursday. * 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 15 at 11:56AM PDT until April 17 at 2:00AM PDT by NWS San Diego CA

* WHAT...West winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Apple and Lucerne Valleys. * WHEN...From 11 AM Thursday to 2 AM PDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Freeze Watch issued April 15 at 11:55AM PDT until April 17 at 9:00AM PDT by NWS Medford OR

* WHAT...Sub-freezing temperatures near 30 to 32 degrees as low as 27 possible. * WHERE...In California, portions of the Klamath River Valley in Western Siskiyou County. In Oregon, Eastern Curry County and Josephine County, including the Illinois Valley. * WHEN...For the Frost Advisory, from 3 AM to 9 AM PDT Thursday. For the Freeze Watch, from late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Wind Advisory issued April 15 at 11:55AM PDT until April 15 at 8:00PM PDT by NWS Medford OR

* WHAT...Southwest winds 30 to 40 mph with gusts up to 55 mph expected. * WHERE...Portions of Lake, Modoc, and far eastern Klamath counties, including mostly the higher terrain of Winter Rim, the Warner and Hart mountains, but also including Paisley, Summer Lake, Valley Falls, Wagontire, and parts of highways 140, 395, 31 and 299. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Gusty winds will blow around unsecured objects and a few power outages may result.

Frost Advisory issued April 15 at 11:55AM PDT until April 16 at 9:00AM PDT by NWS Medford OR

* WHAT...Sub-freezing temperatures near 30 to 32 degrees as low as 27 possible. * WHERE...In California, portions of the Klamath River Valley in Western Siskiyou County. In Oregon, Eastern Curry County and Josephine County, including the Illinois Valley. * WHEN...For the Frost Advisory, from 3 AM to 9 AM PDT Thursday. For the Freeze Watch, from late Thursday night through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Wind Advisory issued April 15 at 11:54AM PDT until April 16 at 11:00PM PDT by NWS Sacramento CA

* WHAT...North winds 15 to 25 mph with gusts up to 40 mph expected. * WHERE...Sacramento Valley and Carquinez Strait and Delta. * WHEN...From 5 AM to 11 PM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and weakened tree limbs could be blown down.

Freeze Watch issued April 15 at 12:06AM PDT until April 17 at 8:00AM PDT by NWS Reno NV

* WHAT...For the Wind Advisory, west winds 20 to 30 mph with gusts up to 50 mph. For the Freeze Watch, sub-freezing temperatures with lows 20 to 25 degrees Friday morning. * WHERE...In California, Surprise Valley California. In Nevada, Northern Washoe County. * WHEN...For the Wind Advisory, from 11 AM this morning to 11 PM PDT this evening. For the Freeze Watch, from Thursday evening through Friday morning. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Blowing dust downwind of desert sinks may reduce visibilities. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Freeze Watch issued April 15 at 12:06AM PDT until April 17 at 8:00AM PDT by NWS Reno NV

* WHAT...Sub-freezing temperatures with lows 21 to 27 degrees Friday morning. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...From Thursday evening through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Lake Wind Advisory issued April 15 at 12:06AM PDT until April 16 at 7:00AM PDT by NWS Reno NV

* WHAT...Southwest winds 20 to 25 mph with gusts up to 35 mph and wave heights 1 to 3 feet. * WHERE...Greater Lake Tahoe Area. * WHEN...From 2 PM this afternoon to 7 AM PDT Thursday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Wind Advisory issued April 15 at 12:06AM PDT until April 15 at 11:00PM PDT by NWS Reno NV

* WHAT...For the Wind Advisory, west winds 20 to 30 mph with gusts up to 50 mph. For the Freeze Watch, sub-freezing temperatures with lows 20 to 25 degrees Friday morning. * WHERE...In California, Surprise Valley California. In Nevada, Northern Washoe County. * WHEN...For the Wind Advisory, from 11 AM this morning to 11 PM PDT this evening. For the Freeze Watch, from Thursday evening through Friday morning. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Blowing dust downwind of desert sinks may reduce visibilities. Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.