Alert archive / Nevada / Excessive Heat Warnings in 2021

Excessive Heat Warning 2, NWS Reno, NV

July 7, 20217 counties in Nevada; 4 counties in California

NWS Reno, NV issued this excessive heat warning at Jul 7, 2021, 9:15 AM PDT for 7 counties in Nevada; 4 counties in California. It was in force for 6 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 7, 2021, 9:15 AM PDT (16:15 UTC)
Expired
Jul 13, 2021, 9:00 PM PDT
In force
6 days
Issued by
NWS Reno, NV

Counties Lassen County, CA, Modoc County, CA, Plumas County, CA, Sierra County, CA, Churchill County, NV, Douglas County, NV, Lyon County, NV, Mineral County, NV, Pershing County, NV, Storey County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 18 km from the middle of the area, began a volume at 16:15 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

Reno, NV (KREV), launched 12:00Z, 4.3 hours before the alert went out and 126 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, Reno, NV at 12:00Z on 2021-07-07Temperature 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, Reno, NV at 12:00Z on 2021-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.19395878Sfc1 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
4123 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
23 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

715 
WWUS75 KREV 071615
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
915 AM PDT Wed Jul 7 2021

NVZ001-004-090000-
/O.UPG.KREV.EH.A.0002.210710T1900Z-210713T0400Z/
/O.NEW.KREV.EH.W.0002.210707T1615Z-210713T0400Z/
Mineral and Southern Lyon Counties-
Western Nevada Basin and Range including Pyramid Lake-
Including the cities of Hawthorne, Yerington, Smith Valley, Mina,
Schurz, Fernley, Fallon, Lovelock, Silver Springs, Nixon, 
and Imlay
915 AM PDT Wed Jul 7 2021

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 9 PM PDT MONDAY...

* WHAT...Dangerously hot conditions with high temperatures 100 to
  105 through Friday rising to 102 to 109 for the weekend into
  early next week. Lows generally 65 to 75.

* WHERE...Mineral and Southern Lyon Counties and Western Nevada 
  Basin and Range including Pyramid Lake.

* WHEN...Until 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.


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. Anyone overcome by heat should be moved to a cool and 
shaded location. Heat stroke is an emergency! Call 9 1 1.

&&

$$

CAZ070-071-NVZ003-005-090000-
/O.CON.KREV.EH.A.0002.210710T1900Z-210713T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Greater Reno-Carson City-Minden Area-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Sparks, 
Verdi, Gardnerville, Virginia City, Empire, and Gerlach
915 AM PDT Wed Jul 7 2021

...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH MONDAY EVENING...

* WHAT...Dangerously hot conditions with afternoon temperatures
  100 to 108 for valleys, with mid 80s to mid 90s for mountains, 
  across northeast California and western Nevada.

* WHERE...Western Nevada Basin and Range including Pyramid Lake, 
  Northern Washoe County, Surprise Valley California, Lassen- 
  Eastern Plumas-Eastern Sierra Counties, Greater Reno-Carson 
  City- Minden Area and Mineral and Southern Lyon Counties.

* WHEN...From Saturday afternoon through Monday evening.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...While not quite as hot this week, afternoon
  temperatures in the mid 90s to low 100s are expected for valleys
  so be prepared and take precautions for the heat, especially if
  you must be out in the sun.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts and warnings for updates on this
situation. Be prepared to drink plenty of fluids, stay in an air-
conditioned room, stay out of the sun, and check up on relatives
and neighbors.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
8 follow-up statements
888 
WWUS75 KREV 072201
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
301 PM PDT Wed Jul 7 2021

CAZ070-071-NVZ003-005-091200-
/O.UPG.KREV.EH.A.0002.210710T1900Z-210713T0400Z/
/O.EXB.KREV.EH.W.0002.210710T1900Z-210713T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Greater Reno-Carson City-Minden Area-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Sparks, 
Verdi, Gardnerville, Virginia City, Empire, and Gerlach
301 PM PDT Wed Jul 7 2021

...EXCESSIVE HEAT WARNING IN EFFECT FROM NOON SATURDAY TO 9 PM
PDT MONDAY...

* WHAT...Dangerously hot conditions with afternoon temperatures
  100 to 108 for valleys, with mid 80s to mid 90s for mountains,
  across northeast California and western Nevada. Lows mostly
  lower 60s to lower 70s for valleys, warmest urbanized and 
  sparsely vegetated areas.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties, 
  Surprise Valley California, Greater Reno-Carson City-Minden 
  Area and Northern Washoe County.

* WHEN...From noon Saturday to 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...While not quite as hot through Friday, 
  afternoon temperatures in the mid 90s to low 100s are expected 
  for valleys so be prepared and take precautions for the heat, 
  especially if you must be out in the sun.

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. Anyone overcome by heat should be moved to a cool and 
shaded location. Heat stroke is an emergency! Call 9 1 1.

&&

$$

NVZ001-004-091200-
/O.CON.KREV.EH.W.0002.000000T0000Z-210713T0400Z/
Mineral and Southern Lyon Counties-
Western Nevada Basin and Range including Pyramid Lake-
Including the cities of Hawthorne, Yerington, Smith Valley, Mina,
Schurz, Fernley, Fallon, Lovelock, Silver Springs, Nixon, 
and Imlay
301 PM PDT Wed Jul 7 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
MONDAY...

* WHAT...Dangerously hot conditions with high temperatures 100 
  to 105 through Friday rising to 102 to 109 for the weekend 
  into early next week. Lows generally 65 to 75.

* WHERE...Mineral and Southern Lyon Counties and Western Nevada 
  Basin and Range including Pyramid Lake.

* WHEN...Until 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.


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. Anyone overcome by heat should be moved to a cool and
shaded location. Heat stroke is an emergency! Call 9 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
382 
WWUS75 KREV 080955
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
255 AM PDT Thu Jul 8 2021

NVZ004-090500-
/O.NEW.KREV.LW.Y.0046.210708T2100Z-210709T0500Z/
/O.CON.KREV.EH.W.0002.000000T0000Z-210713T0400Z/
Western Nevada Basin and Range including Pyramid Lake-
Including the cities of Fernley, Fallon, Lovelock, 
Silver Springs, Nixon, and Imlay
255 AM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
MONDAY...

...LAKE WIND ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM
PDT THIS EVENING...

* WHAT...For the Excessive Heat Warning, dangerously hot
  conditions with high temperatures 100 to 105 through Friday
  rising to 102 to 109 for the weekend into early next week. Lows
  generally 65 to 75. For the Lake Wind Advisory, west winds 10 to
  20 mph with gusts up to 35 mph expected. 

* WHERE...Western Nevada Basin and Range including Pyramid, 
  Lahontan and Rye Patch.

* WHEN...For the Excessive Heat Warning, until 9 PM PDT Monday. 
  For the Lake Wind Advisory, from 2 PM this afternoon to 10 PM 
  PDT this evening.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities. Small boats, 
  kayaks and paddle boards will be prone to capsizing and should 
  remain off lake waters until conditions improve. 

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.

&&

$$

NVZ003-090500-
/O.NEW.KREV.LW.Y.0046.210708T2100Z-210709T0500Z/
/O.CON.KREV.EH.W.0002.210710T1900Z-210713T0400Z/
Greater Reno-Carson City-Minden Area-
Including the cities of Sparks, Verdi, Gardnerville, 
and Virginia City
255 AM PDT Thu Jul 8 2021

...LAKE WIND ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM
PDT THIS EVENING...

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO
9 PM PDT MONDAY...

* WHAT...For the Excessive Heat Warning, dangerously hot
  conditions with afternoon temperatures upper 90s to 105 and 
  morning lows in the 60s to lower 70s expected. For the Lake Wind
  Advisory, southwest winds 10 to 20 mph with gusts up to 35 mph 
  expected for Washoe Lake.

* WHERE...Greater Reno-Carson City-Minden Area.

* WHEN...For the Excessive Heat Warning, from noon Saturday to 9 
  PM PDT Monday. For the Lake Wind Advisory, from 2 PM this 
  afternoon to 10 PM PDT this evening.

* IMPACTS...Extreme heat will significantly increase the potential
  for heat related illnesses, particularly for those working or
  participating in outdoor activities. Small boats, kayaks and
  paddle boards will be prone to capsizing and should remain off
  lake waters until conditions improve. 

* ADDITIONAL DETAILS...While not quite as hot through Friday,
  afternoon temperatures in the mid 90s to near 100 are expected 
  for valleys so be prepared and take precautions for the heat, 
  especially if you must be out in the sun.

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.

&&

$$

NVZ001-090500-
/O.CON.KREV.EH.W.0002.000000T0000Z-210713T0400Z/
Mineral and Southern Lyon Counties-
Including the cities of Hawthorne, Yerington, Smith Valley, Mina,
and Schurz
255 AM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
MONDAY...

* WHAT...Dangerously hot conditions with high temperatures 100 
  to 105 through Friday rising to 102 to 109 for the weekend 
  into early next week. Lows generally 65 to 75.

* WHERE...Mineral and Southern Lyon Counties.

* WHEN...Until 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the potential
  for heat related illnesses, particularly for those working or
  participating in outdoor activities.

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.

&&

$$

CAZ070-071-NVZ005-090500-
/O.CON.KREV.EH.W.0002.210710T1900Z-210713T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Empire, 
and Gerlach
255 AM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO
9 PM PDT MONDAY...

* WHAT...Dangerously hot conditions with afternoon temperatures
  100 to 108 for valleys, with mid 80s to mid 90s for mountain
  communities. Morning lows in the lower 60s to lower 70s.

* WHERE...Surprise Valley California, Lassen-Eastern Plumas- 
  Eastern Sierra Counties and Northern Washoe County.

* WHEN...From noon Saturday to 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...While not quite as hot through Friday,
  afternoon temperatures in the mid 90s to near 100 are expected 
  for valleys so be prepared and take precautions for the heat, 
  especially if you must be out in the sun.

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.

&&

$$

CAZ073-090500-
/O.NEW.KREV.LW.Y.0046.210708T2100Z-210709T0500Z/
Mono County-
Including the cities of Bridgeport, Coleville, Lee Vining, 
and Mammoth Lakes
255 AM PDT Thu Jul 8 2021

...LAKE WIND ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM
PDT THIS EVENING...

* WHAT...Southwest winds 10 to 20 mph with gusts up to 35 mph 
  expected.

* WHERE...Topaz, Bridgeport, Mono, and Crowley.

* WHEN...From 2 PM this afternoon to 10 PM PDT this evening.

* IMPACTS...Small boats, kayaks and paddle boards will be prone 
  to capsizing and should remain off lake waters until 
  conditions improve.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Check lake conditions before heading out and be prepared for a
sudden increase in winds and wave heights. Consider postponing
boating activities on the lake until a day with less wind.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
795 
WWUS75 KREV 090509
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
1009 PM PDT Thu Jul 8 2021

NVZ003-101100-
/O.EXP.KREV.LW.Y.0046.000000T0000Z-210709T0500Z/
/O.CON.KREV.EH.W.0002.210710T1900Z-210713T0400Z/
Greater Reno-Carson City-Minden Area-
Including the cities of Sparks, Verdi, Gardnerville, 
and Virginia City
1009 PM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO
9 PM PDT MONDAY...

* WHAT...Dangerously hot conditions with afternoon temperatures
  upper 90s to 105 and morning lows in the 60s to lower 70s.

* WHERE...Greater Reno-Carson City-Minden Area.

* WHEN...From noon Saturday to 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...While not quite as hot through Friday,
  afternoon temperatures in the mid 90s to near 100 are expected 
  for valleys so be prepared and take precautions for the heat, 
  especially if you must be out in the sun.

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.

&&

$$

NVZ004-101100-
/O.EXP.KREV.LW.Y.0046.000000T0000Z-210709T0500Z/
/O.CON.KREV.EH.W.0002.000000T0000Z-210713T0400Z/
Western Nevada Basin and Range including Pyramid Lake-
Including the cities of Fernley, Fallon, Lovelock, 
Silver Springs, Nixon, and Imlay
1009 PM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
MONDAY... 

* WHAT...Dangerously hot conditions with high temperatures 100 to
  105 through Friday rising to 102 to 109 for the weekend into 
  early next week. Lows generally 65 to 75.

* WHERE...Western Nevada Basin and Range including Pyramid Lake.

* WHEN...Until 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

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.

&&

$$

CAZ073-090615-
/O.EXP.KREV.LW.Y.0046.000000T0000Z-210709T0500Z/
Mono County-
Including the cities of Bridgeport, Coleville, Lee Vining, 
and Mammoth Lakes
1009 PM PDT Thu Jul 8 2021

...LAKE WIND ADVISORY HAS EXPIRED...

Winds have dropped below advisory levels and no longer pose a
threat on area lakes this evening.

$$

NVZ001-101100-
/O.CON.KREV.EH.W.0002.000000T0000Z-210713T0400Z/
Mineral and Southern Lyon Counties-
Including the cities of Hawthorne, Yerington, Smith Valley, Mina,
and Schurz
1009 PM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
MONDAY...

* WHAT...Dangerously hot conditions with high temperatures 100 
  to 105 through Friday rising to 102 to 109 for the weekend 
  into early next week. Lows generally 65 to 75.

* WHERE...Mineral and Southern Lyon Counties.

* WHEN...Until 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

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.

&&

$$

CAZ070-071-NVZ005-101100-
/O.CON.KREV.EH.W.0002.210710T1900Z-210713T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Empire, 
and Gerlach
1009 PM PDT Thu Jul 8 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON SATURDAY TO
9 PM PDT MONDAY...

* WHAT...Dangerously hot conditions with afternoon temperatures 
  100 to 108 for valleys, with mid 80s to mid 90s for mountain 
  communities. Morning lows in the lower 60s to lower 70s.

* WHERE...Surprise Valley California, Lassen-Eastern Plumas- 
  Eastern Sierra Counties and Northern Washoe County.

* WHEN...From noon Saturday to 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...While not quite as hot through Friday, 
  afternoon temperatures in the mid 90s to near 100 are expected 
  for valleys so be prepared and take precautions for the heat, 
  especially if you must be out in the sun.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
823 
WWUS75 KREV 101043
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
343 AM PDT Sat Jul 10 2021

NVZ001-004-110600-
/O.CON.KREV.EH.W.0002.000000T0000Z-210713T0400Z/
Mineral and Southern Lyon Counties-
Western Nevada Basin and Range including Pyramid Lake-
Including the cities of Hawthorne, Yerington, Smith Valley, Mina,
Schurz, Fernley, Fallon, Lovelock, Silver Springs, Nixon, 
and Imlay
343 AM PDT Sat Jul 10 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
MONDAY...

* WHAT...Dangerously hot conditions with high temperatures 102 to
  109 this weekend into early next week. Lows generally 65 to 75.

* WHERE...Mineral and Southern Lyon Counties.

* WHEN...Until 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Despite a slight cooling trend starting
  Tuesday, temperatures will remain above normal. These persistent
  hot conditions will continue to create heat risks for 
  vulnerable groups throughout the rest of the week.

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.

&&

$$

CAZ070-071-NVZ003-005-110600-
/O.CON.KREV.EH.W.0002.210710T1900Z-210713T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Greater Reno-Carson City-Minden Area-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Sparks, 
Verdi, Gardnerville, Virginia City, Empire, and Gerlach
343 AM PDT Sat Jul 10 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO
9 PM PDT MONDAY...

* WHAT...Dangerously hot conditions with afternoon temperatures 
  100 to 108 for valleys, with mid 80s to mid 90s for mountain 
  communities. Morning lows in the lower 60s to lower 70s.

* WHERE...Surprise Valley California, Lassen-Eastern Plumas- 
  Eastern Sierra Counties and Northern Washoe County.

* WHEN...From noon today to 9 PM PDT Monday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Despite a slight cooling trend starting
  Tuesday, temperatures will remain above normal. These persistent
  hot conditions will continue to create heat risks for 
  vulnerable groups throughout the rest of the week.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
059 
WWUS75 KREV 102210
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
310 PM PDT Sat Jul 10 2021

CAZ070-071-NVZ001-003>005-130000-
/O.EXT.KREV.EH.W.0002.000000T0000Z-210714T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Mineral and Southern Lyon Counties-
Greater Reno-Carson City-Minden Area-
Western Nevada Basin and Range including Pyramid Lake-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Hawthorne, 
Yerington, Smith Valley, Mina, Schurz, Sparks, Verdi, 
Gardnerville, Virginia City, Fernley, Fallon, Lovelock, 
Silver Springs, Nixon, Imlay, Empire, and Gerlach
310 PM PDT Sat Jul 10 2021

...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 9 PM PDT TUESDAY...

* WHAT...Dangerously hot conditions with afternoon temperatures 99
  to 109 for lower valleys, with mid 80s to mid 90s for mountain 
  communities. Morning lows in the lower 60s to lower 70s.

* WHERE...Surprise Valley California, Lassen-Eastern Plumas- 
  Eastern Sierra Counties and Northern Washoe County.

* WHEN...Until 9 PM PDT Tuesday.

* IMPACTS...Extreme heat will significantly increase the  
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Despite a cooling trend with temperatures
  falling to more typical mid-summer heat for mid to late next
  week, heat risks for vulnerable groups will remain through next
  week.

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.
Anyone overcome by heat should be moved to a cool and shaded 
location. Heat stroke is an emergency! Call 9 1 1.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
577 
WWUS75 KREV 120932
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
232 AM PDT Mon Jul 12 2021

CAZ070-071-NVZ001-003>005-131215-
/O.CON.KREV.EH.W.0002.000000T0000Z-210714T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Mineral and Southern Lyon Counties-
Greater Reno-Carson City-Minden Area-
Western Nevada Basin and Range including Pyramid Lake-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Hawthorne, 
Yerington, Smith Valley, Mina, Schurz, Sparks, Verdi, 
Gardnerville, Virginia City, Fernley, Fallon, Lovelock, 
Silver Springs, Nixon, Imlay, Empire, and Gerlach
232 AM PDT Mon Jul 12 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT
TUESDAY...

* CHANGES...None.

* WHAT...Dangerously hot conditions with afternoon temperatures
  100 to 109 for lower valleys, with mid 80s to mid 90s for 
  mountain communities. Morning lows in the lower 60s to lower 70s
  in lower elevation valleys.

* WHERE...Most of Western Nevada and Northeast California.

* WHEN...Until 9 PM PDT Tuesday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...High temperatures will be near record
  levels for many locations today and Tuesday. Overnight lows will
  be well above normal, lessening the ability for homes without
  air conditioning to cool off effectively.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
275 
WWUS75 KREV 131009
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
309 AM PDT Tue Jul 13 2021

CAZ070-071-NVZ001-003>005-140400-
/O.CON.KREV.EH.W.0002.000000T0000Z-210714T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Mineral and Southern Lyon Counties-
Greater Reno-Carson City-Minden Area-
Western Nevada Basin and Range including Pyramid Lake-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Hawthorne, 
Yerington, Smith Valley, Mina, Schurz, Sparks, Verdi, 
Gardnerville, Virginia City, Fernley, Fallon, Lovelock, 
Silver Springs, Nixon, Imlay, Empire, and Gerlach
309 AM PDT Tue Jul 13 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

* CHANGES...None.

* WHAT...Dangerously hot conditions with high temperatures today 
  in lower elevation valleys of 98 to 105. Mountain communities 
  will see highs in the upper 80s to near 90. Less hot Wednesday, 
  with temperatures a little closer to normal Thursday through 
  Saturday.

* WHERE...Much of Western Nevada and Northeast California

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

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.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/rev
263 
WWUS75 KREV 140346
NPWREV

URGENT - WEATHER MESSAGE
National Weather Service Reno NV
846 PM PDT Tue Jul 13 2021

CAZ070-071-NVZ001-003>005-140500-
/O.EXP.KREV.EH.W.0002.000000T0000Z-210714T0400Z/
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Mineral and Southern Lyon Counties-
Greater Reno-Carson City-Minden Area-
Western Nevada Basin and Range including Pyramid Lake-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell, 
Portola, Susanville, Westwood, Sierraville, Loyalton, Hawthorne, 
Yerington, Smith Valley, Mina, Schurz, Sparks, Verdi, 
Gardnerville, Virginia City, Fernley, Fallon, Lovelock, 
Silver Springs, Nixon, Imlay, Empire, and Gerlach
846 PM PDT Tue Jul 13 2021

...EXCESSIVE HEAT WARNING WILL EXPIRE AT 9 PM PDT THIS EVENING...

The Excessive Heat Warning will be allowed to expire as scheduled
this evening. 

$$

For more information from the National Weather Service visit
http://weather.gov/rev

What forecasters said that day

The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Reno, NV wrote its last area forecast discussion before this excessive heat warning went out at Jul 7, 3:09 AM PDT, 6 hours 6 minutes earlier.

Area forecast discussion, Jul 7, 3:09 AM PDT, 6 hours 6 minutes before
Area Forecast Discussion
National Weather Service Reno NV
309 AM PDT Wed Jul 7 2021

.SYNOPSIS...

Hot, above average afternoon temperatures continue for the next
week with highs reaching 100 to 108 degrees for valleys in northeast
California and western Nevada over the weekend. Typical afternoon
breezes are expected through Thursday with lighter breezes Friday
through the weekend. Low thunderstorm chances return late in the
week.

&&

.SHORT TERM...

* Slight chance for isolated thunderstorms over Mono/Mineral
  Counties each afternoon starting Thursday and continuing into
  next week.

* Hot summer temperatures that will continue to trend hotter this
  weekend.

Little change to the short term forecast outside some minor
maintenance to acknowledge updated model guidance. Speaking of
model guidance, it continues to pursue the notion for strong high
pressure building over the Desert Southwest into the Great Basin
region. High pressure ridging into western Nevada and the Sierra
will ensure skies remain mostly clear as a stable-dry southwest
upper flow increases over northeast CA and western NV through much
of the short term forecast.

Temperature-wise through Friday, afternoons will remain very warm in
Sierra valleys and hot in lower valleys with only a very minor down
tick in daytime temperatures possibly today and Thursday. For the
most part regional temperature reaming 5-10 degrees above average
through the remainder of the week. This trend will continue into
the weekend with some daytime and even higher overnight temps
either touching or exceeding record territory.

*  It is still advised to continue to hydrate, stay in an air-
   conditioned building, stay out of the sun, and check up on
   relatives and neighbors.

*  This cannot be reiterated more but young children and pets
   should never be left unattended in vehicles.

Afternoon and evening breezes will approach more typical summer
levels today through Thursday. Another weak wave, however, will
push into the Pacific Northwest Thursday and drag its southern
extension across northern CA and NV as it flattens the upper
ridge. As this upper wave continues east into the northern Inter-
mountain West, the ridge axis will shift south and allow a more
west–east push of momentum over the northern Sierra and
northwest NV. The afternoon thermal/pressure gradient tightens in
response to the trough passage and will translate into a slight
pickup of wind Thursday afternoon with some gusts topping into the
35 mph range. As this upper trough axis passes over northern
CA/NV it complements the already hot/dry conditions over the
region so elevated fire weather concerns remain topic of concern.
Therefore a fire weather watch is in effect for areas within the
northern and southern Sierra Front Thursday afternoon and evening.
See the Fire Discussion if this is of interest to you.

Today, mid-level capping is expected to suppress any thunderstorm
development through the afternoon/evening with storm chances
remaining below 10%. A minor moisture increase in a weak southerly
upper flow into the central Sierra Thursday and Friday may sneak
into areas south of Highway 50. This could allow for a few cumulus
build-ups or even an isolated thunderstorm or two in the
afternoon over Mineral and southern Lyon counties as a modest
westerly wind convergence develops. Given surface convergence and
the modest intrusion of some mid -level moisture, thunderstorm
chances will still remain relatively low. But this could change as
storm chances briefly pop up into 10-15% territory given the
strong surface heating under clear skies which is enough to
overcome any mid level cap. -Amanda

.LONG TERM...Saturday through early next week

...Excessive heat watch continues for Saturday through Monday...

The upper ridge will finally break its restraints in the wake of
the Pacific Northwest upper trough and swell over the southwest
CONUS Friday and through the weekend. This will bring a trend up
in temperatures into the weekend with atrocious afternoon
temperatures topping out between 100 and 108 for valleys near and
below 5000 feet for the weekend (versus mid 90's to low 100's
prior to Saturday).

With both European and GEFS ensemble simulations still following
similar pattern, confidence remains high that lower valley
locations will see highs consistently topping triple digits into
early next week. NBM guidance suggests that there is around a 10%
chance for the all time record high (108) to be reached at the
Reno climate station over the weekend. The Sierra will not be able
to dodge this heat bullet either with highs reaching the
upper 80's to mid 90's by the weekend.

Thunderstorm chances begin slowly to peek up over eastern CA and
far western NV later in the week as the heat builds and encourages
higher terrain build-ups. Chances look to be running between
10-20% under the influence of the strong upper high; therefore,
any developing storms may have little effect in controlling the
repressive afternoon heat. -Snyder/Amanda

&&

.AVIATION...

VFR for the next couple of days across NE CA and western NV with
just some afternoon cumulus buildups over higher terrain areas.
Chances for a late afternoon and early evening thunderstorm in
Mono and Mineral Counties will continue to remain 10% or less
chance for the next 24-36hrs. Winds look fairly typical for summer
with afternoon and evening gusts generally in the 15-25 kt range
along the Sierra Front into western NV.

Hot afternoons may bring some concern for density altitudes this
week; however, hotter temperatures topping out between 100-108 F
this weekend may bring an increase concern over this week. Impacts
to CIG/VSBY from smoke/haze may still continue to be a concern
through the forecast period due to erratic fire activity of
regional wildfires. -Amanda

&&

.FIRE WEATHER...

* Hot, dry, and breezy this week with the strongest winds
  expected on Thursday.

* Afternoon and evening thunderstorms possible Friday to Monday
  for the Eastern Sierra and southern Sierra Front.

No major changes from when I wrote this yesterday afternoon. High
pressure over the Desert Southwest will lead to an extended
period of hot-dry conditions through the weekend and into early
next week. Afternoon and evening breezes will develop each day at
least through the end of the week as well. The heat and wind will
lead to enhanced fire weather concerns, especially Thursday.

Winds gusts should hang around 25-30 mph each day with a few pockets
reaching 35 mph. Thursday is looking a bit more concerning with low
pressure passing through the Pacific Northwest. This may increase
winds in valley locations near and above 30 mph, perhaps as high
as 40 mph in a few spots along the Sierra Front. A Fire Weather
Watch is in effect for Thursday afternoon and evening.

A few late afternoon and evening thunderstorms may return by
Friday and persist into Monday especially over the eastern Sierra
and as far north as South Tahoe, Douglas, and Lyon Counties. Heat
and lack of moisture would favor dry thunderstorms with gusty
outflow winds. Light steering flow aloft could allow for a couple
wetter storms over Mono County. Brong

&&

.REV Watches/Warnings/Advisories...
NV...Fire Weather Watch from Thursday afternoon through Thursday
     evening NVZ420-421.

     Excessive Heat Watch from Saturday afternoon through Monday
     evening NVZ001-003>005.

     Fire Weather Watch from Thursday afternoon through Thursday
     evening NVZ423-458.

CA...Excessive Heat Watch from Saturday afternoon through Monday
     evening CAZ070-071.

&&

For more information from the National Weather Service visit...
http://weather.gov/reno

In the hours before

Special weather statement, Jul 7, 3:35 AM PDT, 5 hours 40 minutes before
Special Weather Statement
National Weather Service RENO NV
335 AM PDT Wed Jul 7 2021

CAZ072-073-NVZ002-090000-
Greater Lake Tahoe Area-Mono County-
Including the cities of South Lake Tahoe, Tahoe City, Truckee,
Markleeville, Bridgeport, Coleville, Lee Vining, Mammoth Lakes,
Stateline, Glenbrook, and Incline Village
335 AM PDT Wed Jul 7 2021

...VERY HOT LATE THIS WEEK INTO EARLY NEXT WEEK...

Strong high pressure will move over the Sierra late this week and
persist at least into early next week. This is expected to push
highs into the upper 80s to mid 90s for Sierra valleys starting
Friday, with highs peaking in the upper 60s to upper 70s even over
higher Sierra peaks.

If you plan on venturing into the Sierra this weekend to escape
the lower elevation heat, note that conditions will still feel
quite hot for the afternoon hours, especially if you are exposed
to the sun. Also, Lake Tahoe water temperatures are in the upper
60s so cold water shock is still possible which can greatly
increase the chances for inhaling water and drowning. Personal
flotation devices are recommended at all times.

http://weather.gov/reno

The office that day

Everything else NWS Reno, NV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 7, 1:23 PM PDTRed Flag WarningREVChurchill, Douglas, Lyon, Mineral, Pershing, Storey and 1 more33 hr

Nearby

Excessive Heat Warnings in Nevada, 2021Excessive Heat Warnings in California, 2021Every excessive heat warning 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.