Alert archive / California / Heat Advisories in 2021
Heat Advisory 6, NWS Eureka, CA
NWS Eureka, CA issued this heat advisory at Jul 28, 2021, 9:50 AM PDT for Lake County, Mendocino County, Trinity County, California. It took effect at Jul 30, 2021, 10:00 AM PDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Jul 28, 2021, 9:50 AM PDT (16:50 UTC)
- In effect from
- Jul 30, 2021, 10:00 AM PDT
- Expired
- Jul 30, 2021, 8:00 PM PDT
- In force
- 10 hr
- Issued by
- NWS Eureka, CA
Counties Lake County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Beale AFB radar (KBBX), 128 km from the middle of the area, began a volume at 16:54 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 4.8 hours before the alert went out and 235 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1583 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
772 WWUS76 KEKA 281650 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 950 AM PDT Wed Jul 28 2021 CAZ107-108-110>115-290100- /O.NEW.KEKA.HT.Y.0006.210730T1700Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 950 AM PDT Wed Jul 28 2021 ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM PDT FRIDAY... * WHAT...Temperatures from 100 to 110 expected. * WHERE...Northern Trinity, Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...From 10 AM to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. 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. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
8 follow-up statements
469 WWUS76 KEKA 282105 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 205 PM PDT Wed Jul 28 2021 CAZ107-108-110>115-290515- /O.CON.KEKA.HT.Y.0006.210730T1700Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 205 PM PDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT FRIDAY... * WHAT...Temperatures from 100 to 110 expected. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Lake and Northern Lake Counties. * WHEN...From 10 AM to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
399 WWUS76 KEKA 291358 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 658 AM PDT Thu Jul 29 2021 CAZ107-108-110>115-292200- /O.CON.KEKA.HT.Y.0006.210730T1700Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 658 AM PDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT FRIDAY... * WHAT...Temperatures from 100 to 110 expected. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Lake and Northern Lake Counties. * WHEN...From 10 AM to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. 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. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
926 WWUS76 KEKA 292107 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 207 PM PDT Thu Jul 29 2021 CAZ107-108-110>115-300515- /O.CON.KEKA.HT.Y.0006.210730T1700Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 207 PM PDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT FRIDAY... * WHAT...Temperatures from 100 to 110 expected. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Lake and Northern Lake Counties. * WHEN...From 10 AM to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
123 WWUS76 KEKA 300506 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1006 PM PDT Thu Jul 29 2021 CAZ107-108-110>115-301315- /O.CON.KEKA.HT.Y.0006.210730T1700Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 1006 PM PDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT FRIDAY... * WHAT...Temperatures from 100 to 110 expected. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Lake and Northern Lake Counties. * WHEN...From 10 AM to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. 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. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
781 WWUS76 KEKA 301227 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 527 AM PDT Fri Jul 30 2021 CAZ107-108-110>115-302030- /O.CON.KEKA.HT.Y.0006.210730T1700Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 527 AM PDT Fri Jul 30 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM PDT THIS EVENING... * WHAT...High Temperatures from 100 to 106 expected, with localized readings up to 110. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity and Lake Counties. * WHEN...From 10 AM this morning to 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
521 WWUS76 KEKA 301710 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1010 AM PDT Fri Jul 30 2021 CAZ107-108-110>115-310115- /O.CON.KEKA.HT.Y.0006.000000T0000Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 1010 AM PDT Fri Jul 30 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Temperatures from 100 to 110 expected. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Lake and Northern Lake Counties. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur. 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. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
407 WWUS76 KEKA 302105 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 205 PM PDT Fri Jul 30 2021 CAZ107-108-110>115-310300- /O.CON.KEKA.HT.Y.0006.000000T0000Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 205 PM PDT Fri Jul 30 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Temperatures from 100 to 110. * WHERE...Southern Trinity, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Lake and Northern Lake Counties. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
065 WWUS76 KEKA 310257 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 757 PM PDT Fri Jul 30 2021 CAZ107-108-110>115-310400- /O.EXP.KEKA.HT.Y.0006.000000T0000Z-210731T0300Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 757 PM PDT Fri Jul 30 2021 ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... $$
Nearby
Heat Advisories in California, 2021Every heat advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.