Alert archive / California / Heat Advisories in 2021
Heat Advisory 3, NWS Eureka, CA
NWS Eureka, CA issued this heat advisory at Jun 19, 2021, 9:21 PM PDT for Lake County, Mendocino County, Trinity County, California. It took effect at Jun 19, 2021, 11:00 PM PDT. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Jun 19, 2021, 9:21 PM PDT (04:21 UTC)
- In effect from
- Jun 19, 2021, 11:00 PM PDT
- Expired
- Jun 20, 2021, 2:41 PM PDT
- In force
- 16 hr
- Issued by
- NWS Eureka, CA
Counties Lake County, CA, Mendocino County, CA, Trinity County, CA
The nearest sounding before it
Oakland, CA (KOAK), launched 00:00Z, 4.4 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
- 2590 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
487 WWUS76 KEKA 200421 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 921 PM PDT Sat Jun 19 2021 CAZ114-115-200530- /O.CAN.KEKA.EH.W.0001.000000T0000Z-210620T0600Z/ Northern Lake-Southern Lake- 921 PM PDT Sat Jun 19 2021 ...EXCESSIVE HEAT WARNING IS CANCELLED... $$ CAZ107-108-111-201230- /O.CAN.KEKA.HT.Y.0002.000000T0000Z-210621T0400Z/ /O.NEW.KEKA.HT.Y.0003.210620T0600Z-210621T0400Z/ Northern Trinity-Southern Trinity-Northeastern Mendocino Interior- 921 PM PDT Sat Jun 19 2021 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM PDT SUNDAY... * WHAT...Temperatures up to 104 expected. * WHERE...Northern Trinity, Southern Trinity and Northeastern Mendocino Interior Counties. * WHEN...Until 9 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ110-113-200530- /O.CAN.KEKA.HT.Y.0002.000000T0000Z-210620T0600Z/ Northwestern Mendocino Interior-Southeastern Mendocino Interior- 921 PM PDT Sat Jun 19 2021 ...HEAT ADVISORY IS CANCELLED... $$
2 follow-up statements
634 WWUS76 KEKA 201217 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 517 AM PDT Sun Jun 20 2021 CAZ114-210400- /O.EXA.KEKA.HT.Y.0003.000000T0000Z-210621T0400Z/ Northern Lake- 517 AM PDT Sun Jun 20 2021 ...HEAT ADVISORY IN EFFECT UNTIL 9 PM THIS EVENING... * WHAT...Temperatures up to 103. * WHERE...Northern Lake County. * WHEN...Until 9 PM this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, schedule frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. $$ CAZ107-108-111-210400- /O.CON.KEKA.HT.Y.0003.000000T0000Z-210621T0400Z/ Northern Trinity-Southern Trinity-Northeastern Mendocino Interior- 517 AM PDT Sun Jun 20 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM THIS EVENING... * WHAT...Temperatures up to 102. * WHERE...Trinity County, Northeastern Mendocino Interior. * WHEN...Until 9 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. $$
867 WWUS76 KEKA 202141 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 241 PM PDT Sun Jun 20 2021 CAZ107-108-111-114-202245- /O.CAN.KEKA.HT.Y.0003.000000T0000Z-210621T0400Z/ Northern Trinity-Southern Trinity-Northeastern Mendocino Interior- Northern Lake- 241 PM PDT Sun Jun 20 2021 ...HEAT ADVISORY IS CANCELLED... $$
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.