Alert archive / California / Heat Advisories in 2021

Heat Advisory 9, NWS Eureka, CA

August 26, 2021Lake County, Mendocino County, California

NWS Eureka, CA issued this heat advisory at Aug 26, 2021, 1:06 AM PDT for Lake County, Mendocino County, California. It took effect at Aug 28, 2021, 10:00 AM PDT. It was in force for 34 hr.

The area

The counties it named.

The facts

Issued
Aug 26, 2021, 1:06 AM PDT (08:06 UTC)
In effect from
Aug 28, 2021, 10:00 AM PDT
Expired
Aug 29, 2021, 8:00 PM PDT
In force
34 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 08:11 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 00:00Z, 8.1 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.

Skew-T log-pSkew-T log-p diagram, Oakland, CA at 00:00Z on 2021-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Oakland, CA at 00:00Z on 2021-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2398 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

484 
WWUS76 KEKA 260806
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
106 AM PDT Thu Aug 26 2021

CAZ110>115-261615-
/O.NEW.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
106 AM PDT Thu Aug 26 2021

...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM PDT SATURDAY...

* WHAT...Temperatures up to 110 expected.

* WHERE...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 Saturday.

* 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.

&&

$$
11 follow-up statements
070 
WWUS76 KEKA 260903
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
203 AM PDT Thu Aug 26 2021

CAZ110>115-261715-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
203 AM PDT Thu Aug 26 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
SATURDAY...

* WHAT...Temperatures up to 110 expected.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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.

&&

$$
171 
WWUS76 KEKA 261719
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1019 AM PDT Thu Aug 26 2021

CAZ110>115-270200-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
1019 AM PDT Thu Aug 26 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
SATURDAY...

* WHAT...Afternoon high temperatures 100 to 106. Overnight low
  temperatures in the mid 50s to mid 60s. 

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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.

&&

$$
954 
WWUS76 KEKA 270145
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
645 PM PDT Thu Aug 26 2021

CAZ110>115-270945-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
645 PM PDT Thu Aug 26 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
SATURDAY...

* WHAT...Temperatures up to 104 expected.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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.

&&

$$
472 
WWUS76 KEKA 270946
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
246 AM PDT Fri Aug 27 2021

CAZ110>115-271800-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
246 AM PDT Fri Aug 27 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
SATURDAY...

* WHAT...Temperatures up to 105 expected.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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.

&&

$$
393 
WWUS76 KEKA 271746
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1046 AM PDT Fri Aug 27 2021

CAZ110>115-280215-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
1046 AM PDT Fri Aug 27 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
SATURDAY...

* WHAT...Afternoon high temperatures 100 to 106. Overnight low
  temperatures in the mid 50s to mid 60s. 

* WHERE...Southwestern Mendocino Interior, Southeastern Mendocino
  Interior, Northwestern Mendocino Interior, Northeastern
  Mendocino Interior, and Lake County. 

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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 280201
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
701 PM PDT Fri Aug 27 2021

CAZ110>115-281015-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
Northern Lake-Southern Lake-
701 PM PDT Fri Aug 27 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM PDT
SATURDAY...

* WHAT...Temperatures up to 104 expected.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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.

&&

$$
867 
WWUS76 KEKA 280945
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
245 AM PDT Sat Aug 28 2021

CAZ114-115-281745-
/O.EXT.KEKA.HT.Y.0009.210828T1700Z-210830T0300Z/
Northern Lake-Southern Lake-
245 AM PDT Sat Aug 28 2021

...HEAT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 8 PM
PDT SUNDAY...

* WHAT...Temperatures up to 104 expected.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM this morning 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.

&&

$$

CAZ110>113-281745-
/O.CON.KEKA.HT.Y.0009.210828T1700Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
245 AM PDT Sat Aug 28 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM PDT THIS EVENING...

* WHAT...Temperatures up to 107 expected.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior, 
  Northeastern Mendocino Interior, Northern Lake and Southern 
  Lake Counties.

* WHEN...From 10 AM to 8 PM PDT Saturday.

* 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.

&&

$$
783 
WWUS76 KEKA 281731
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
1031 AM PDT Sat Aug 28 2021

CAZ110>113-290300-
/O.CON.KEKA.HT.Y.0009.000000T0000Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
1031 AM PDT Sat Aug 28 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING...

* WHAT...Temperatures up to 104.

* WHERE...Southwestern Mendocino Interior, Southeastern 
  Mendocino Interior, Northwestern Mendocino Interior and 
  Northeastern Mendocino Interior 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.

&&

$$

CAZ114-115-291115-
/O.CON.KEKA.HT.Y.0009.000000T0000Z-210830T0300Z/
Northern Lake-Southern Lake-
1031 AM PDT Sat Aug 28 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SUNDAY...

* WHAT...Temperatures up to 104.

* WHERE...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.

&&

$$
901 
WWUS76 KEKA 290259
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
759 PM PDT Sat Aug 28 2021

CAZ110>113-290400-
/O.EXP.KEKA.HT.Y.0009.000000T0000Z-210829T0300Z/
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
Southwestern Mendocino Interior-Southeastern Mendocino Interior-
759 PM PDT Sat Aug 28 2021

...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING...

$$

CAZ114-115-291100-
/O.CON.KEKA.HT.Y.0009.000000T0000Z-210830T0300Z/
Northern Lake-Southern Lake-
759 PM PDT Sat Aug 28 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SUNDAY...

* WHAT...Temperatures up to 103.

* WHERE...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.

&&

$$
992 
WWUS76 KEKA 291005
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
305 AM PDT Sun Aug 29 2021

CAZ113-300300-
/O.EXA.KEKA.HT.Y.0009.000000T0000Z-210830T0300Z/
Southeastern Mendocino Interior-
305 AM PDT Sun Aug 29 2021

...HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT THIS EVENING...

* WHAT...Temperatures up to 105.

* WHERE...Southeastern Mendocino Interior County.

* 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.

&&

$$

CAZ114-115-300300-
/O.CON.KEKA.HT.Y.0009.000000T0000Z-210830T0300Z/
Northern Lake-Southern Lake-
305 AM PDT Sun Aug 29 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING...

* WHAT...Temperatures up to 104.

* WHERE...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.

&&

$$
747 
WWUS76 KEKA 300245
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
745 PM PDT Sun Aug 29 2021

CAZ113>115-300345-
/O.EXP.KEKA.HT.Y.0009.000000T0000Z-210830T0300Z/
Southeastern Mendocino Interior-Northern Lake-Southern Lake-
745 PM PDT Sun Aug 29 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.

IssuedProductOfficeCountiesLasted
Aug 26, 2:43 AM PDTGale WarningEKA3 days
Aug 26, 2:43 AM PDTSmall Craft AdvisoryEKA39 hr
Aug 26, 2:43 AM PDTHazardous Seas WatchEKA24 hr

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.