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.

Heat Advisory issued July 10 at 10:56PM PDT until July 15 at 11:00PM PDT by NWS Hanford CA

* WHAT...High temperatures up to 105 degrees expected. * WHERE...San Joaquin Valley, Coastal Ranges, Sierra Nevada foothills, Kern River Valley, and Yosemite Valley. * WHEN...From 11 AM Friday to 11 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses.

Heat Advisory issued July 10 at 9:46PM PDT until July 12 at 11:00PM PDT by NWS Eureka CA

* WHAT...Moderate heat risk is expected with highs from 100 to 105 each afternoon. * WHERE...Northwestern Mendocino Interior and Southeastern Mendocino Interior. * WHEN...From 11 AM Friday to 11 PM PDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Overnight lows around 60 will provide some relief in the valleys, but higher terrain may see lows remain in the 70s.

Heat Advisory issued July 10 at 9:46PM PDT until July 13 at 11:00PM PDT by NWS Eureka CA

* WHAT...Moderate to locally major heat heat risk is expected with highs between 100 and 105 in the valleys. * WHERE...Lake County, and Northeastern Mendocino Interior. * WHEN...From 11 AM Friday to 11 PM PDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Overnight lows in the low 60s will provide some relief in the valleys, but higher terrain may see lows remain in the 70s.

Heat Advisory issued July 10 at 9:46PM PDT until July 13 at 11:00PM PDT by NWS Eureka CA

* WHAT...Moderate to major heat risk is possible with highs of 100 to 105. * WHERE...Humboldt Interior, and Del Norte Interior. * WHEN...From 11 AM Saturday to 11 PM PDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The warmest locations will be in eastern Del Norte and Humboldt counties.

Extreme Heat Warning issued July 10 at 9:46PM PDT until July 14 at 11:00PM PDT by NWS Eureka CA

* WHAT...Dangerously hot conditions with high temperatures above 105 in the lower elevation valley locations expected through Monday. Moderate to locally extreme heat risk is expected. * WHERE...Trinity County. * WHEN...From 11 AM Friday to 11 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The valleys may see some relief overnight with lows in the 60s, but the mid slopes and ridges will likely stay in the 70s.

Wind Advisory issued July 10 at 8:06PM PDT until July 11 at 3:00AM PDT by NWS Los Angeles/Oxnard CA

* WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph. * WHERE...Santa Barbara County Southwestern Coast and Santa Ynez Mountains Western Range. * WHEN...Until 3 AM PDT Friday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result.

Extreme Heat Warning issued July 10 at 1:45PM PDT until July 14 at 8:00PM PDT by NWS Medford OR

* WHAT...Dangerously hot conditions with high temperatures of 100 to 105 expected, except up to 110 in the valleys of western Siskiyou County. Low temperatures will be mainly in the mid to upper 60s. * WHERE...In California, Central Siskiyou County and Western Siskiyou County. In Oregon, Eastern Curry County and Josephine County and Jackson County. This includes Medford, Ashland, Grants Pass, Cave Junction, Happy Camp, Fort Jones, and Yreka. * WHEN...From 2 PM Saturday to 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...This heat wave may extend into Tuesday and Wednesday.

Heat Advisory issued July 10 at 1:45PM PDT until July 14 at 8:00PM PDT by NWS Medford OR

* WHAT...High temperatures of 95 to 100 are expected. Low temperatures will be mainly in the mid to upper 50s. * WHERE...Lake County and eastern Klamath County, South Central Siskiyou County, North Central and Southeast Siskiyou County, Northeast Siskiyou and Northwest Modoc Counties, Modoc County, and Klamath Basin. This includes Klamath Falls, Lakeview, Mount Shasta, and Alturas. * WHEN...From 2 PM Saturday to 8 PM PDT Monday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...This heat wave may extend into Tuesday and Wednesday.

Heat Advisory issued July 10 at 1:31PM PDT until July 14 at 11:00PM PDT by NWS Sacramento CA

* WHAT...High temperatures up to 95 to 110 expected. Overnight low temperatures in the upper 60s to around 80. Widespread Moderate HeatRisk with areas of Major HeatRisk. * WHERE...Burney Basin / Eastern Shasta County, Central Sacramento Valley, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills/Sacramento Valley, Northern Sacramento Valley, Shasta Lake Area / Northern Shasta County, and Western Plumas County/Lassen Park. * WHEN...From 11 AM Friday to 11 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during heat events, particularly for those working or participating in outdoor activities.

Heat Advisory issued July 10 at 1:16PM PDT until July 16 at 11:00AM PDT by NWS Reno NV

* WHAT...High temperatures of 95-105 degrees expected with overnight low temperatures in the upper 60s and lower 70s. Widespread Major HeatRisk with isolated areas of Extreme HeatRisk. * WHERE...In California, Surprise Valley California. In Nevada, Northern Washoe County, Western Nevada Basin and Range including Pyramid Lake, Greater Reno-Carson City-Minden Area, and Mineral and Southern Lyon Counties. * WHEN...From 11 AM Sunday to 11 AM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during heat events, particularly for those working or participating in outdoor activities.