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Home Return to list Heat Advisory 0003 Issued by the Eureka Forecast Office
Action: Time Extended Issued At: 2026-08-06 14:36:59 664 WWUS76 KEKA 061936 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1236 PM PDT Thu Aug 6 2026 CAZ112-070345- /O.NEW.KEKA.HT.Y.0005.260808T1700Z-260810T0500Z/ Southwestern Interior Mendocino- Including Boonville, Philo, Yorkville, and Comptche 1236 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk. * WHERE...Southwestern Interior Mendocino. * WHEN...From 10 AM Saturday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ108-116-117-070345- /O.EXT.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Helena, Hayfork, Big Bar, Junction City, Carrville, Weaverville, Ruth, Del Loma, Trinity Center, Hyampom, Peanut, Zenia, Forest Glen, and Douglas City 1236 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Trinity County. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-070345- /O.EXT.KEKA.HT.Y.0004.260807T1800Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Upper Lake, Clearlake, Covelo, Ukiah, Hopland, Clearlake Park, Potter Valley, Calpella, Lakeport, Cobb, Hidden Valley Lake, Legget, Laytonville, Gravelly Valley Airport, Redwood Valley, Finley, Middletown, Willits, Talmage, and Knobcone Camp 1236 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY NOW IN EFFECT FROM 11 AM FRIDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...From 11 AM Friday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ105-106-070345- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260807T0600Z/ Northeastern Interior Humboldt-Southeastern Interior Humboldt- Including Benbow, Kneeland, Garberville, Orleans, Bridgeville, Dinsmore, Willow Creek, Hoopa, Shively, Bull Creek, Pepperwood, Alderpoint, and Weitchpec 1236 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Humboldt Interior. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka RPA Action: Continued Issued At: 2026-08-06 22:20:46 401 WWUS76 KEKA 070320 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 820 PM PDT Thu Aug 6 2026 CAZ105-106-070600- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260807T0600Z/ Northeastern Interior Humboldt-Southeastern Interior Humboldt- Including Dinsmore, Orleans, Bull Creek, Willow Creek, Weitchpec, Bridgeville, Kneeland, Hoopa, Pepperwood, Garberville, Shively, Benbow, and Alderpoint 820 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Humboldt Interior. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ108-116-117-071130- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Helena, Trinity Center, Weaverville, Del Loma, Forest Glen, Douglas City, Zenia, Junction City, Hyampom, Big Bar, Ruth, Peanut, Carrville, and Hayfork 820 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Humboldt Interior. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-071130- /O.CON.KEKA.HT.Y.0004.260807T1800Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Clearlake Park, Laytonville, Talmage, Covelo, Ukiah, Upper Lake, Willits, Hopland, Redwood Valley, Cobb, Knobcone Camp, Potter Valley, Finley, Calpella, Hidden Valley Lake, Legget, Gravelly Valley Airport, Clearlake, Lakeport, and Middletown 820 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM FRIDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...From 11 AM Friday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-071130- /O.CON.KEKA.HT.Y.0005.260808T1700Z-260810T0500Z/ Southwestern Interior Mendocino- Including Yorkville, Philo, Comptche, and Boonville 820 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk. * WHERE...Southwestern Interior Mendocino. * WHEN...From 10 AM Saturday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka EYS Action: Continued Issued At: 2026-08-07 00:51:20 938 WWUS76 KEKA 070551 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1051 PM PDT Thu Aug 6 2026 CAZ105-106-070700- /O.EXP.KEKA.HT.Y.0003.000000T0000Z-260807T0600Z/ Northeastern Interior Humboldt-Southeastern Interior Humboldt- Including Alderpoint, Benbow, Weitchpec, Pepperwood, Willow Creek, Bridgeville, Dinsmore, Garberville, Bull Creek, Hoopa, Kneeland, Shively, and Orleans 1051 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY WILL EXPIRE AT 11 PM PDT THIS EVENING... $$ CAZ108-116-117-071400- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Del Loma, Zenia, Helena, Carrville, Junction City, Douglas City, Hayfork, Hyampom, Trinity Center, Weaverville, Big Bar, Ruth, Forest Glen, and Peanut 1051 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Trinity County. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-071400- /O.CON.KEKA.HT.Y.0004.260807T1800Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Hopland, Lakeport, Hidden Valley Lake, Willits, Gravelly Valley Airport, Finley, Potter Valley, Legget, Talmage, Ukiah, Calpella, Knobcone Camp, Middletown, Clearlake, Laytonville, Clearlake Park, Redwood Valley, Cobb, Upper Lake, and Covelo 1051 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM FRIDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...From 11 AM Friday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-071400- /O.CON.KEKA.HT.Y.0005.260808T1700Z-260810T0500Z/ Southwestern Interior Mendocino- Including Comptche, Philo, Yorkville, and Boonville 1051 PM PDT Thu Aug 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk. * WHERE...Southwestern Interior Mendocino. * WHEN...From 10 AM Saturday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka MKK Action: Continued Issued At: 2026-08-07 08:32:12 493 WWUS76 KEKA 071331 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 631 AM PDT Fri Aug 7 2026 CAZ108-116-117-072145- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Del Loma, Zenia, Helena, Carrville, Junction City, Douglas City, Hayfork, Hyampom, Trinity Center, Weaverville, Big Bar, Ruth, Forest Glen, and Peanut 631 AM PDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Trinity County. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-072145- /O.CON.KEKA.HT.Y.0004.260807T1800Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Hopland, Lakeport, Hidden Valley Lake, Willits, Gravelly Valley Airport, Finley, Potter Valley, Legget, Talmage, Ukiah, Calpella, Knobcone Camp, Middletown, Clearlake, Laytonville, Clearlake Park, Redwood Valley, Cobb, Upper Lake, and Covelo 631 AM PDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...From 11 AM this morning to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-072145- /O.CON.KEKA.HT.Y.0005.260808T1700Z-260810T0500Z/ Southwestern Interior Mendocino- Including Comptche, Philo, Yorkville, and Boonville 631 AM PDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk. * WHERE...Southwestern Interior Mendocino. * WHEN...From 10 AM Saturday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka MKK Action: Continued Issued At: 2026-08-07 19:01:03 411 WWUS76 KEKA 080000 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 500 PM PDT Fri Aug 7 2026 CAZ108-116-117-080800- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Douglas City, Weaverville, Hyampom, Hayfork, Ruth, Peanut, Zenia, Big Bar, Helena, Junction City, Trinity Center, Del Loma, Carrville, and Forest Glen 500 PM PDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Trinity County. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-080800- /O.CON.KEKA.HT.Y.0004.000000T0000Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Knobcone Camp, Legget, Hopland, Talmage, Hidden Valley Lake, Ukiah, Willits, Middletown, Clearlake, Clearlake Park, Finley, Calpella, Cobb, Potter Valley, Gravelly Valley Airport, Laytonville, Redwood Valley, Upper Lake, Lakeport, and Covelo 500 PM PDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-080800- /O.CON.KEKA.HT.Y.0005.260808T1700Z-260810T0500Z/ Southwestern Interior Mendocino- Including Philo, Comptche, Yorkville, and Boonville 500 PM PDT Fri Aug 7 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk. * WHERE...Southwestern Interior Mendocino. * WHEN...From 10 AM Saturday to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka EYS Action: Continued Issued At: 2026-08-08 02:23:58 137 WWUS76 KEKA 080723 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1223 AM PDT Sat Aug 8 2026 CAZ105-106-081530- /O.EXB.KEKA.HT.Y.0003.260808T1800Z-260809T0600Z/ Northeastern Interior Humboldt-Southeastern Interior Humboldt- Including Pepperwood, Bridgeville, Kneeland, Alderpoint, Garberville, Orleans, Bull Creek, Benbow, Shively, Willow Creek, Dinsmore, Weitchpec, and Hoopa 1223 AM PDT Sat Aug 8 2026 ...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 11 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 105 will produce moderate to major HeatRisk. * WHERE...Humboldt Interior. * WHEN...From 11 AM this morning to 11 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...The warmest temperatures are expected to be in the eastern half of Humboldt county as well as southern Humboldt. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ108-116-117-081530- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Peanut, Douglas City, Forest Glen, Big Bar, Carrville, Hyampom, Trinity Center, Hayfork, Weaverville, Del Loma, Junction City, Ruth, Helena, and Zenia 1223 AM PDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Trinity County. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-081530- /O.CON.KEKA.HT.Y.0004.000000T0000Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Potter Valley, Hopland, Gravelly Valley Airport, Cobb, Knobcone Camp, Willits, Lakeport, Laytonville, Upper Lake, Hidden Valley Lake, Redwood Valley, Calpella, Covelo, Ukiah, Finley, Middletown, Clearlake Park, Legget, Talmage, and Clearlake 1223 AM PDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-081530- /O.CON.KEKA.HT.Y.0005.260808T1700Z-260810T0500Z/ Southwestern Interior Mendocino- Including Yorkville, Boonville, Philo, and Comptche 1223 AM PDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk. * WHERE...Southwestern Interior Mendocino. * WHEN...From 10 AM this morning to 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into the weekend. Saturday will be the peak day for HeatRisk! PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka MKK Action: Continued Issued At: 2026-08-08 23:33:39 180 WWUS76 KEKA 090433 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 933 PM PDT Sat Aug 8 2026 CAZ105-106-090545- /O.CAN.KEKA.HT.Y.0003.000000T0000Z-260809T0600Z/ Northeastern Interior Humboldt-Southeastern Interior Humboldt- Including Willow Creek, Weitchpec, Benbow, Bridgeville, Bull Creek, Kneeland, Shively, Hoopa, Dinsmore, Alderpoint, Garberville, Orleans, and Pepperwood 933 PM PDT Sat Aug 8 2026 ...HEAT ADVISORY IS CANCELLED... Temperatures continue to decrease after sunset, and hence the heat advisory is cancelled. $$ CAZ108-116-117-091245- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Hyampom, Big Bar, Hayfork, Douglas City, Weaverville, Helena, Junction City, Del Loma, Peanut, Trinity Center, Ruth, Zenia, Forest Glen, and Carrville 933 PM PDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk on Sunday. * WHERE...Trinity County. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-091245- /O.CON.KEKA.HT.Y.0004.000000T0000Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Cobb, Finley, Laytonville, Ukiah, Willits, Redwood Valley, Legget, Gravelly Valley Airport, Upper Lake, Covelo, Middletown, Lakeport, Knobcone Camp, Hopland, Potter Valley, Talmage, Clearlake, Hidden Valley Lake, Calpella, and Clearlake Park 933 PM PDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk on Sunday. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-091245- /O.CON.KEKA.HT.Y.0005.000000T0000Z-260810T0500Z/ Southwestern Interior Mendocino- Including Philo, Comptche, Yorkville, and Boonville 933 PM PDT Sat Aug 8 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SUNDAY... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk on Sunday. * WHERE...Southwestern Interior Mendocino. * WHEN...Until 10 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka MH Action: Continued Issued At: 2026-08-09 07:18:10 833 WWUS76 KEKA 091217 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 517 AM PDT Sun Aug 9 2026 CAZ108-116-117-092030- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Del Loma, Weaverville, Ruth, Peanut, Zenia, Hyampom, Helena, Forest Glen, Douglas City, Junction City, Hayfork, Big Bar, Trinity Center, and Carrville 517 AM PDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk on Sunday. * WHERE...Trinity County. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-092030- /O.CON.KEKA.HT.Y.0004.000000T0000Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Clearlake, Redwood Valley, Knobcone Camp, Laytonville, Gravelly Valley Airport, Hopland, Covelo, Clearlake Park, Hidden Valley Lake, Middletown, Legget, Calpella, Lakeport, Upper Lake, Willits, Potter Valley, Ukiah, Finley, Talmage, and Cobb 517 AM PDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk on Sunday. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-092030- /O.CON.KEKA.HT.Y.0005.000000T0000Z-260810T0500Z/ Southwestern Interior Mendocino- Including Philo, Comptche, Boonville, and Yorkville 517 AM PDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk on Sunday. * WHERE...Southwestern Interior Mendocino. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka MKK Action: Continued Issued At: 2026-08-09 16:52:56 362 WWUS76 KEKA 092152 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 252 PM PDT Sun Aug 9 2026 CAZ108-116-117-100500- /O.CON.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Forest Glen, Del Loma, Douglas City, Weaverville, Big Bar, Zenia, Hyampom, Helena, Hayfork, Carrville, Peanut, Ruth, Trinity Center, and Junction City 252 PM PDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk on Sunday. * WHERE...Humboldt Interior. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ110-111-113-114-118>120-100500- /O.CON.KEKA.HT.Y.0004.000000T0000Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Laytonville, Redwood Valley, Finley, Gravelly Valley Airport, Clearlake, Upper Lake, Calpella, Middletown, Hopland, Talmage, Lakeport, Clearlake Park, Legget, Potter Valley, Ukiah, Knobcone Camp, Hidden Valley Lake, Covelo, Willits, and Cobb 252 PM PDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures of 100 to 110 will produce moderate to major HeatRisk on Sunday. * WHERE...Northern Mendocino Interior, Lake County, and Southeastern Interior Mendocino. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ112-100500- /O.CON.KEKA.HT.Y.0005.000000T0000Z-260810T0500Z/ Southwestern Interior Mendocino- Including Philo, Yorkville, Comptche, and Boonville 252 PM PDT Sun Aug 9 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures of 90 to 101 will produce moderate HeatRisk on Sunday. * WHERE...Southwestern Interior Mendocino. * WHEN...Until 10 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Hot temperatures are expected to continue into Sunday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka MH Action: Expired Issued At: 2026-08-09 23:31:09 171 WWUS76 KEKA 100430 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 930 PM PDT Sun Aug 9 2026 CAZ108-116-117-100530- /O.EXP.KEKA.HT.Y.0003.000000T0000Z-260810T0500Z/ Southern Trinity-Northwestern and Central Trinity-Northeastern Trinity- Including Forest Glen, Del Loma, Douglas City, Weaverville, Big Bar, Zenia, Hyampom, Helena, Hayfork, Carrville, Peanut, Ruth, Trinity Center, and Junction City 930 PM PDT Sun Aug 9 2026 ...HEAT ADVISORY WILL EXPIRE AT 10 PM PDT THIS EVENING... $$ CAZ110-111-113-114-118>120-100530- /O.EXP.KEKA.HT.Y.0004.000000T0000Z-260810T0500Z/ Northwestern Interior Mendocino-Northeastern Interior Mendocino- Southeastern Interior Mendocino-Northern Lake-Western Lake- Southwestern Lake-Eastern Lake- Including Laytonville, Redwood Valley, Finley, Gravelly Valley Airport, Clearlake, Upper Lake, Calpella, Middletown, Hopland, Talmage, Lakeport, Clearlake Park, Legget, Potter Valley, Ukiah, Knobcone Camp, Hidden Valley Lake, Covelo, Willits, and Cobb 930 PM PDT Sun Aug 9 2026 ...HEAT ADVISORY WILL EXPIRE AT 10 PM PDT THIS EVENING... $$ CAZ112-100530- /O.EXP.KEKA.HT.Y.0005.000000T0000Z-260810T0500Z/ Southwestern Interior Mendocino- Including Philo, Yorkville, Comptche, and Boonville 930 PM PDT Sun Aug 9 2026 ...HEAT ADVISORY WILL EXPIRE AT 10 PM PDT THIS EVENING... $$ For hazard areas see https://www.weather.gov/wrh/hazards/?wfo=eka JB | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||