Alert archive / California / Heat Advisories in 2021
Heat Advisory 8, NWS Eureka, CA
NWS Eureka, CA issued this heat advisory at Aug 13, 2021, 1:26 PM PDT for Lake County, Mendocino County, California. It took effect at Aug 14, 2021, 1:00 PM PDT. It was in force for 31 hr.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2021, 1:26 PM PDT (20:26 UTC)
- In effect from
- Aug 14, 2021, 1:00 PM PDT
- Expired
- Aug 15, 2021, 8:00 PM PDT
- In force
- 31 hr
- Issued by
- NWS Eureka, CA
Counties Lake County, CA, Mendocino County, CA
The radar
The Beale AFB radar (KBBX), 128 km from the middle of the area, began a volume at 20:29 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, 8.4 hours before the alert went out and 188 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
- 1864 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
124 WWUS76 KEKA 132026 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 126 PM PDT Fri Aug 13 2021 CAZ110-111-113>115-140530- /O.NEW.KEKA.HT.Y.0008.210814T2000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 126 PM PDT Fri Aug 13 2021 ...HEAT ADVISORY IN EFFECT FROM 1 PM SATURDAY TO 8 PM PDT SUNDAY... * WHAT...Temperatures up to 108 expected. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior, Southeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...From 1 PM Saturday to 8 PM PDT Sunday. * 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. && $$
7 follow-up statements
832 WWUS76 KEKA 140518 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1018 PM PDT Fri Aug 13 2021 CAZ110-111-113>115-141300- /O.CON.KEKA.HT.Y.0008.210814T2000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 1018 PM PDT Fri Aug 13 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 1 PM SATURDAY TO 8 PM PDT SUNDAY... * WHAT...High temperatures mainly 104 to 108 expected. Overnight low temperatures 60 to 64. * WHERE...Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...From 1 PM Saturday to 8 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
829 WWUS76 KEKA 141110 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 410 AM PDT Sat Aug 14 2021 CAZ110-111-113>115-141915- /O.CON.KEKA.HT.Y.0008.210814T2000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 410 AM PDT Sat Aug 14 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM PDT SUNDAY... * WHAT...Temperatures up to 110 expected. * WHERE...Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...From 1 PM this afternoon to 8 PM PDT Sunday. * 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. && $$
745 WWUS76 KEKA 141901 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1201 PM PDT Sat Aug 14 2021 CAZ110-111-113>115-150315- /O.CON.KEKA.HT.Y.0008.210814T2000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 1201 PM PDT Sat Aug 14 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SUNDAY... * WHAT...Temperatures up to 110 expected. * WHERE...Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
025 WWUS76 KEKA 150318 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 818 PM PDT Sat Aug 14 2021 CAZ110-111-113>115-151130- /O.CON.KEKA.HT.Y.0008.000000T0000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 818 PM PDT Sat Aug 14 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SUNDAY... * WHAT...High temperatures 100 to 108 expected. Overnight low temperatures 62 to 72. * WHERE...Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...Until 8 PM PDT Sunday. * 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. && $$
873 WWUS76 KEKA 151112 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 412 AM PDT Sun Aug 15 2021 CAZ110-111-113>115-151915- /O.CON.KEKA.HT.Y.0008.000000T0000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 412 AM PDT Sun Aug 15 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Temperatures up to 107. * WHERE...Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
869 WWUS76 KEKA 151908 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1208 PM PDT Sun Aug 15 2021 CAZ110-111-113>115-160300- /O.CON.KEKA.HT.Y.0008.000000T0000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 1208 PM PDT Sun Aug 15 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM THIS EVENING... * WHAT...Temperatures up to 107. * WHERE...Southeastern Mendocino Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Lake County. * WHEN...Until 8 PM 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, schedule 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. $$
831 WWUS76 KEKA 160245 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 745 PM PDT Sun Aug 15 2021 CAZ110-111-113>115-160345- /O.EXP.KEKA.HT.Y.0008.000000T0000Z-210816T0300Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 745 PM PDT Sun Aug 15 2021 ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 2:36 PM PDT | Small Craft Advisory | EKA | 8 days |
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.