Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
211 PM PDT Tue Aug 19 2025
CAZ300-304-307-308-313-314-316-200600-
/O.UPG.KHNX.XH.A.0002.250822T1800Z-250824T1500Z/
/O.NEW.KHNX.XH.W.0002.250822T1800Z-250824T1500Z/
West Side Mountains north of 198-Coalinga - Avenal-Fresno-Clovis-
West Side Mountains South of 198-Buena Vista-Bakersfield-South
End San Joaquin Valley-
Including the cities of Fresno, Taft, San Luis Reservoir, Avenal,
McKittrick, Coalinga, Blackwells Corner, Bakersfield, Lamont, and
Arvin
211 PM PDT Tue Aug 19 2025
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM FRIDAY TO 8 AM PDT
SUNDAY...
* WHAT...Dangerously hot conditions with high temperatures up to 106
expected. Warm overnight lows in the mid 70s to lower 80s from
Friday until Sunday morning.
* WHERE...Bakersfield, Buena Vista, Coalinga - Avenal,
Fresno-Clovis, South End San Joaquin Valley, West Side Mountains
South of 198, and West Side Mountains north of 198.
* WHEN...From 11 AM Friday to 8 AM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
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.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Stay cool, stay hydrated, stay informed.
Overnight lows may provide little or no relief from the heat,
especially in the urban and foothill areas.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
211 PM PDT Tue Aug 19 2025
CAZ317-319-321-200600-
/O.NEW.KHNX.XH.W.0002.250822T1800Z-250824T1500Z/
Mariposa Madera Foothills-Fresno-Tulare Foothills-South End
Sierra Foothills-
Including the cities of Mariposa, Millerton Lake, and El Portal
211 PM PDT Tue Aug 19 2025
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM FRIDAY TO 8 AM PDT
SUNDAY...
* WHAT...Dangerously hot conditions with high temperatures up to 106
expected. Warm overnight lows in the mid 70s to lower 80s from
Friday until Sunday morning.
* WHERE...Fresno-Tulare Foothills, Mariposa Madera Foothills, and
South End Sierra Foothills.
* WHEN...From 11 AM Friday to 8 AM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Stay cool, stay hydrated, stay informed.
Overnight lows may provide little or no relief from the heat,
especially in the urban and foothill areas.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
211 PM PDT Tue Aug 19 2025
CAZ337>339-200600-
/O.UPG.KHNX.XH.A.0002.250821T1800Z-250824T1500Z/
/O.NEW.KHNX.XH.W.0002.250821T1800Z-250824T1500Z/
Indian Wells Valley-Mojave Desert Slopes-Mojave Desert-
Including the cities of Edwards AFB, Mojave, Rosamond, Inyokern,
Randsburg, Ridgecrest, and California City
211 PM PDT Tue Aug 19 2025
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 AM PDT
SUNDAY...
* WHAT...Dangerously hot conditions with high temperatures 105 to
110 degrees possible. Warm overnight lows in the mid 70s to lower
80s from Thursday until Sunday morning.
* WHERE...Indian Wells Valley, Mojave Desert, and Mojave Desert
Slopes.
* WHEN...From 11 AM Thursday to 8 AM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
210 PM PDT Tue Aug 19 2025
CAZ038-088-342>345-348-353-369-371>383-548-201200-
/O.CON.KLOX.XH.W.0002.250821T1800Z-250824T0400Z/
Cuyama Valley-Santa Clarita Valley-Santa Lucia Mountains-Southern
Salinas Valley-San Luis Obispo County Interior Valleys-San Luis
Obispo County Mountains-Santa Ynez Valley-Santa Barbara County
Interior Mountains-Western Santa Monica Mountains Recreational
Area-Calabasas and Agoura Hills-Western San Fernando Valley-
Eastern San Fernando Valley-Southeastern Ventura County Valleys-
Santa Susana Mountains-Southern Ventura County Mountains-Northern
Ventura County Mountains-Interstate 5 Corridor-Western San
Gabriel Mountains and Highway 14 Corridor-Eastern San Gabriel
Mountains-Western Antelope Valley Foothills-Eastern Antelope
Valley Foothills-Antelope Valley-Los Angeles County San Gabriel
Valley-
Including the cities of Santa Ynez, El Monte, Figueroa Mountain,
Malibu Bowl, Northridge, Gorman, Paso Robles, Santa Margarita
Lake, Matilija, Los Olivos, Palmdale, Pyramid Lake, Westlake
Village, Creston, Lake Cachuma, New Cuyama, La Canada Flintridge,
Mount Baldy, Irish Hills, The Angeles Crest Highway, Shandon,
Moorpark, Lancaster, Lake Los Angeles, Chatsworth, Santa Clarita,
San Rafael Mountain, Pearblossom, Rose Valley, Wrightwood,
Pasadena, Warm Springs, Mount Wilson, Mount Pinos, East Los
Angeles, Acton, Topatopa Mountains, Newhall, Elizabeth Lake,
Atascadero, Caliente Range, Big Pine Mountain, Templeton, Van
Nuys, La Panza Range, Universal City, Sunland, Ozena, San Miguel,
Valencia, Malibu Lake, Burbank, Solvang, Thousand Oaks, Valyermo,
Lake Castaic, Lake Nacimiento, Tejon Pass, San Gabriel, Woodland
Hills, Llano, Newbury Park, Lake Palmdale, Mill Creek, Oat
Mountain, Lockwood Valley, Hearst Castle, Simi Valley, Carrizo
Plain, Pomona, and Glendale
210 PM PDT Tue Aug 19 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM THURSDAY TO 9
PM PDT SATURDAY...
* WHAT...Dangerously hot conditions with temperatures of 95 to 110
degrees expected.
* WHERE...A portion of southwest California.
* WHEN...From 11 AM Thursday to 9 PM PDT Saturday.
* IMPACTS...There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors.
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.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
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.
Stay cool, stay hydrated, stay informed.
Monitor the latest forecasts and warnings for updates.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
1228 PM PDT Tue Aug 19 2025
CAZ060-200500-
/O.UPG.KSGX.XH.A.0002.250821T1700Z-250824T0300Z/
/O.NEW.KSGX.XH.W.0003.250820T1700Z-250824T0300Z/
Apple and Lucerne Valleys-
Including the cities of Victorville, Apple Valley, Hesperia, and
Lucerne Valley
1228 PM PDT Tue Aug 19 2025
...EXTREME HEAT WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM PDT
SATURDAY...
* WHAT...Dangerously hot conditions with temperatures 100 to 107
possible.
* WHERE...Apple and Lucerne Valleys.
* WHEN...From 10 AM Wednesday to 8 PM PDT Saturday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
* ADDITIONAL DETAILS...Thursday and Friday are expected to be the
hottest days.
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.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
421 AM PDT Tue Aug 19 2025
AZZ001>003-036-CAZ520-522>527-NVZ015>017-020>022-201500-
/O.CON.KVEF.XH.W.0009.250820T1500Z-250824T0600Z/
Northwest Plateau-Lake Havasu and Fort Mohave-Northwest Deserts-
Lake Mead National Recreation Area-Owens Valley-Death Valley
National Park-Western Mojave Desert-Eastern Mojave Desert-Morongo
Basin-Cadiz Basin-San Bernardino County-Upper Colorado River
Valley-Lincoln County-Northeast Clark County-Western Clark and
Southern Nye County-Las Vegas Valley-Lake Mead National
Recreation Area-Southern Clark County-
Including the cities of Shoshone, Yucca, Pahrump, Baker,
Twentynine Palms, Mountain Pass, Bullhead City, Mesquite, Furnace
Creek, Vidal Junction, Pioche, Desert Rock, Bishop, Lone Pine,
Laughlin, North Las Vegas, Overton, Pipe Spring National
Monument, Oatman, Las Vegas, Alamo, Stovepipe Wells, Mitchell
Caverns, Valentine, Topock, Mt Trumbull, Hoover Dam, Barstow,
Moapa, Searchlight, Desert Hills, Wikieup, Morongo Valley,
Needles, Panaca, Dolan Springs, Olancha, Western Grand Canyon,
Cal-Nev-Ari, Mohave Valley, Yucca Valley, Indian Springs,
Kingman, Hiko, Rachel, Boulder City, Lake Havasu City, Amargosa
Valley, Tuweep, Henderson, Daggett, Primm, Independence, Fort
Irwin, Caliente, Golden Valley, and Colorado City
421 AM PDT Tue Aug 19 2025 /421 AM MST Tue Aug 19 2025/
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 8 AM PDT /8 AM MST/
WEDNESDAY TO 11 PM PDT /11 PM MST/ SATURDAY...
* WHAT...Dangerously hot conditions with temperatures around 105 in
Kingman, Golden Valley, Dolan Springs; around 110 in Las Vegas,
Pahrump, Barstow, Yucca Valley, Twentynine Palms; around 115 in
Laughlin, Bullhead City, Needles, Lake Havasu City; around 120 at
Furnace Creek in Death Valley National Park. Expect minimal
overnight relief. Major-to-Extreme Heat Risk. In the Owens Valley,
temperatures will be around 100 to 105, yielding Moderate Heat
Risk.
* WHERE...Portions of northwest Arizona, southeast California, and
south central and southern Nevada.
* WHEN...From 8 AM PDT /8 AM MST/ Wednesday to 11 PM PDT /11 PM MST/
Saturday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.
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.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
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.
Monitor the latest forecasts and warnings for updates.
&&
$$
Red Flag Warning
URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
127 PM PDT Tue Aug 19 2025
...RED FLAG WARNING IN EFFECT FROM 9 AM PDT WEDNESDAY TO 9 PM PDT
SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF
PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH... LOW
RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR PORTIONS OF THE
MOUNTAINS AND FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES...
...RED FLAG WARNING IN EFFECT FROM 9 AM PDT THURSDAY TO 9 PM PDT
SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF
PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW
RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR PORTIONS OF THE
MOUNTAINS AND FOOTHILLS OF SANTA BARBARA AND SAN LUIS OBISPO
COUNTIES...
.A significant heatwave is on the way for late this week into
this weekend, bringing dangerous fire-weather conditions.
CAZ238-345-351>353-240400-
/O.UPG.KLOX.FW.A.0007.250821T1600Z-250824T0400Z/
/O.EXB.KLOX.FW.W.0005.250821T1600Z-250824T0400Z/
Cuyama Valley-San Luis Obispo County Mountains-
Santa Ynez Mountains Western Range-
Santa Ynez Mountains Eastern Range-
Santa Barbara County Interior Mountains-
127 PM PDT Tue Aug 19 2025
...RED FLAG WARNING IN EFFECT FROM 9 AM PDT THURSDAY TO 9 PM PDT
SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF
PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW
RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR PORTIONS OF THE
MOUNTAINS AND FOOTHILLS OF SANTA BARBARA AND SAN LUIS OBISPO
COUNTIES...
* TEMPERATURES...Unseasonably hot high temperatures, generally
95-105 degrees, producing unseasonably unstable conditions.
* RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent.
* THUNDERSTORMS...There is a less than 10 percent chance of
isolated thunderstorms Friday through the weekend, and any
accompanying lightning strikes will be capable of starting new
fires on the peripheries of rain cores.
* WINDS...Diurnal wind patterns with speeds of 5-10 mph gusting
to 10-15 mph, locally higher in wind-favored areas such as
through passes and canyons.
* IMPACTS...If fire ignition occurs, conditions are favorable
for extreme fire behavior and rapid fire growth, which could
threaten life and property. Be aware of sudden re-direction of
fires in response to passing outflow boundaries.
* ADDITIONAL DETAILS...Fire-weather headlines may eventually
need to be extended into Sunday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that fire-weather conditions could
potentially become favorable for the development of extreme fire
behavior in the coming days. Use extreme caution with anything
that can spark a wildfire. Residents near wildland interfaces
should be prepared to evacuate if a wildfire breaks out. See
readyforwildfire.org and wildfirerisk.org for information.
&&
$$
URGENT - FIRE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
127 PM PDT Tue Aug 19 2025
...RED FLAG WARNING IN EFFECT FROM 9 AM PDT WEDNESDAY TO 9 PM PDT
SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF
PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH... LOW
RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR PORTIONS OF THE
MOUNTAINS AND FOOTHILLS OF LOS ANGELES AND VENTURA COUNTIES...
...RED FLAG WARNING IN EFFECT FROM 9 AM PDT THURSDAY TO 9 PM PDT
SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS CAPABLE OF
PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME GROWTH...LOW
RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR PORTIONS OF THE
MOUNTAINS AND FOOTHILLS OF SANTA BARBARA AND SAN LUIS OBISPO
COUNTIES...
.A significant heatwave is on the way for late this week into
this weekend, bringing dangerous fire-weather conditions.
CAZ288-375>382-240400-
/O.CON.KLOX.FW.W.0005.250820T1600Z-250824T0400Z/
Santa Clarita Valley-Santa Susana Mountains-
Southern Ventura County Mountains-
Northern Ventura County Mountains-Interstate 5 Corridor-
Western San Gabriel Mountains and Highway 14 Corridor-
Eastern San Gabriel Mountains-Western Antelope Valley Foothills-
Eastern Antelope Valley Foothills-
127 PM PDT Tue Aug 19 2025
...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM PDT WEDNESDAY TO
9 PM PDT SATURDAY FOR AN UNSEASONABLY HOT AND UNSTABLE AIR MASS
CAPABLE OF PRODUCING EXTREME FIRE BEHAVIOR FROM VERTICAL PLUME
GROWTH...LOW RELATIVE HUMIDITY...AND LOCALLY BREEZY WINDS FOR
PORTIONS OF THE MOUNTAINS AND FOOTHILLS OF LOS ANGELES AND VENTURA
COUNTIES...
* TEMPERATURES...Unseasonably hot high temperatures, generally
95- 110 degrees and highest Thursday through Saturday,
producing unseasonably unstable conditions.
* RELATIVE HUMIDITY...Minimum relative humidity 8-20 percent,
lowest Wednesday and Thursday.
* THUNDERSTORMS...Isolated thunderstorms will be possible Friday
through the weekend, and any accompanying lightning strikes
will be capable of starting new fires on the peripheries of rain
cores.
* WINDS...Southwest at 10-20 mph gusting to 20-25 mph over the
western Antelope Valley Foothills and vicinity and in other
wind- favored areas such as through passes and canyons.
Lighter winds elsewhere. Passing outflow boundaries could
bring sudden wind- shifts and increased fire-spread rates,
even from distant thunderstorms.
* IMPACTS...If fire ignition occurs, conditions are favorable
for extreme fire behavior and rapid fire growth, which could
threaten life and property. Be aware of sudden re-direction of
fires in response to passing outflow boundaries.
* ADDITIONAL DETAILS...Fire-weather headlines may eventually
need to be extended into Sunday.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Red Flag Warning means that fire-weather conditions are
expected to be favorable for the development of extreme fire
behavior. Use extreme caution with anything that can spark a
wildfire. Residents near wildland interfaces should be prepared
to evacuate if a wildfire breaks out. See readyforwildfire.org
and wildfirerisk.org for information.
&&
$$
Cohen/Gomberg/Lund
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Hanford CA
211 PM PDT Tue Aug 19 2025
CAZ301>303-305-306-309>312-315-332-200600-
/O.UPG.KHNX.XH.A.0002.250822T1800Z-250824T1500Z/
/O.NEW.KHNX.HT.Y.0004.250822T1800Z-250824T1500Z/
Los Banos - Dos Palos-Merced - Madera - Mendota-Planada - Le
Grand - Snelling-West Side of Fresno and Kings Counties-Caruthers
- San Joaquin - Selma-Buttonwillow - Lost Hills - I5-Delano-Wasco-
Shafter-Hanford - Corcoran - Lemoore-Visalia - Porterville -
Reedley-Southeast San Joaquin Valley-Kern River Valley-
Including the cities of Kerman, Shafter, Kettleman City, Delano,
Atwater, Lake Isabella, Five Points, Visalia, Los Banos, Le
Grand, Merced, Kingsburg, Alpaugh, Planada, Lemoore Station,
Goshen, Tulare, Richgrove, Lake Mcclure, Parlier, Selma,
Kernville, Hanford, Corcoran, Madera, Sanger, Porterville, Wasco,
Buttonwillow, Lemoore, and Lost Hills
211 PM PDT Tue Aug 19 2025
...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 8 AM PDT SUNDAY...
* WHAT...High temperatures up to 107 expected. Warm overnight lows
in the low to mid 70s from Friday until Sunday morning.
* WHERE...A portion of central California.
* WHEN...From 11 AM Friday to 8 AM PDT Sunday.
* IMPACTS...Hot temperatures may cause heat illnesses.
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.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
SM
URGENT - WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
210 PM PDT Tue Aug 19 2025
CAZ341-347-356>358-367-201200-
/O.CON.KLOX.HT.Y.0006.250821T1800Z-250823T0400Z/
San Luis Obispo County Inland Central Coast-Santa Barbara County
Inland Central Coast-Lake Casitas-Ojai Valley-Central Ventura
County Valleys-Palos Verdes Hills-
Including the cities of Fillmore, Rancho Palos Verdes, Santa
Maria, Meiners Oaks, Oak View, Buellton, Piru, Santa Paula,
Nipomo, Ojai, San Luis Obispo, and Lopez Lake
210 PM PDT Tue Aug 19 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THURSDAY TO 9 PM PDT
FRIDAY...
* WHAT...Temperatures of 90 to 105 degrees expected.
* WHERE...Central Ventura County Valleys, Lake Casitas, Ojai Valley,
Palos Verdes Hills, San Luis Obispo County Inland Central Coast,
and Santa Barbara County Inland Central Coast.
* WHEN...From 11 AM Thursday to 9 PM PDT Friday.
* IMPACTS...There is a high risk for heat illness for sensitive
populations including the very young, the very old, those without
air conditioning, and those active outdoors.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
Monitor the latest forecasts and warnings for updates.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Sacramento CA
141 PM PDT Tue Aug 19 2025
CAZ013-015>019-063-202300-
/O.NEW.KSTO.HT.Y.0004.250822T1800Z-250824T0600Z/
Shasta Lake Area / Northern Shasta County-Northern Sacramento
Valley-Central Sacramento Valley-Southern Sacramento Valley-
Carquinez Strait and Delta-Northern San Joaquin Valley-Mountains
Southwestern Shasta County to Western Colusa County-
Including the cities of Chico, Marysville/Yuba City, Stockton,
Oroville, Fairfield/Suisun, Sacramento, Alder Springs, Shasta
Dam, Modesto, Red Bluff, and Redding
141 PM PDT Tue Aug 19 2025
...HEAT ADVISORY IN EFFECT FROM 11 AM FRIDAY TO 11 PM PDT SATURDAY...
* WHAT...High temperatures 95 to 106 expected. Overnight low
temperatures in the mid 60s to 70s. Widespread Moderate HeatRisk
with areas of Major HeatRisk.
* WHERE...Carquinez Strait and Delta, Mountains Southwestern Shasta
County to Western Colusa County, Shasta Lake Area / Northern
Shasta County, Sacramento Valley and Northern San Joaquin Valley.
* WHEN...From 11 AM Friday to 11 PM PDT Saturday.
* IMPACTS...Heat related illnesses increase significantly during
heat events, 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.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
&&
$$
For more information, visit us at www.weather.gov/sto/
IDS
URGENT - WEATHER MESSAGE
National Weather Service San Francisco CA
1227 PM PDT Tue Aug 19 2025
CAZ504-510-512>518-200500-
/O.NEW.KMTR.HT.Y.0004.250821T1700Z-250823T0500Z/
North Bay Interior Mountains-East Bay Interior Valleys-Santa Cruz
Mountains-Santa Clara Valley Including San Jose-Eastern Santa
Clara Hills-East Bay Hills-Southern Salinas Valley/Arroyo Seco
and Lake San Antonio-Santa Lucia Mountains and Los Padres
National Forest-Mountains of San Benito County And Interior
Monterey County including Pinnacles National Park-
1227 PM PDT Tue Aug 19 2025
...HEAT ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 10 PM PDT FRIDAY...
* WHAT...Temperatures in the 90s expected.
* WHERE...Santa Clara Valley and eastern hills, interior East Bay,
North Bay interior mountains, Santa Cruz Mountains, Santa Lucia
Range, southern Salinas Valley, Most of San Benito County.
* WHEN...From 10 AM Thursday to 10 PM PDT Friday.
* IMPACTS...Hot conditions can cause heat illnesses. This level of
heat affects most individuals sensitive to heat, especially those
without effective cooling and/or adequate hydration. Impacts
possible in some health systems and in heat-sensitive industries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Hydration is a critical piece to surviving the heat. Drink water,
and if possible, take water to those who are vulnerable.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to the early
morning or evening. Take action when you experience symptoms of heat
exhaustion and/or heat stroke.
Beat the heat and check the backseat! Do not leave young children or
pets in unattended vehicles.
&&
$$
Flynn
URGENT - WEATHER MESSAGE
National Weather Service Las Vegas NV
421 AM PDT Tue Aug 19 2025
NVZ014-018-019-201500-
/O.CON.KVEF.HT.Y.0003.250820T1500Z-250824T0600Z/
Esmeralda and Central Nye County-Sheep Range-Spring Mountains-Red
Rock Canyon-
Including the cities of Hayford Pk, Mt Charleston, Red Rock
Canyon, Goldfield, Beatty, Dyer, and Silver Peak
421 AM PDT Tue Aug 19 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 AM WEDNESDAY TO 11 PM PDT
SATURDAY...
* WHAT...Above-normal temperatures with afternoon highs in the
low-to-mid 80s for Mount Charleston, Lee Canyon, and Kyle Canyon.
Above-normal temperatures with afternoon highs between 95 and 100
for Goldfield; Tonopah; between 100 and 105 for Beatty. Expect
minimal overnight recovery. Moderate-to-High Heat Risk.
* WHERE...Esmeralda and Central Nye County, Sheep Range, and Spring
Mountains-Red Rock Canyon.
* WHEN...From 8 AM Wednesday to 11 PM PDT Saturday.
* IMPACTS...Hot temperatures may cause heat illnesses.
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.
Take extra precautions when outside. Wear lightweight and loose
fitting clothing. Try to limit strenuous activities to early morning
or evening. Take action when you see symptoms of heat exhaustion and
heat stroke.
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.
Monitor the latest forecasts and warnings for updates.
&&
$$
For more information from the National Weather Service visit
http://weather.gov/lasvegas
MS
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
151 PM PDT Tue Aug 19 2025
PZZ645-200400-
/O.CON.KLOX.SC.Y.0133.000000T0000Z-250820T1000Z/
Point Piedras Blancas to Point Sal westward out to 10 NM-
151 PM PDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
WEDNESDAY...
* WHAT...Hazardous sea conditions. Localized Gale Force gusts
possible around Point Piedras Blancas from 7 PM to 11 PM
tonight.
* WHERE...Point Piedras Blancas to Point Sal westward out to 10
NM.
* WHEN...Until 3 AM PDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
for more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
151 PM PDT Tue Aug 19 2025
PZZ670-200400-
/O.CON.KLOX.SC.Y.0133.000000T0000Z-250821T1000Z/
Point Piedras Blancas to Point Sal from 10 to 60 NM-
151 PM PDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...
* WHAT...Hazardous sea conditions. Localized gusts to 35 kts
tonight between 7 PM and midnight in northern portions.
* WHERE...Point Piedras Blancas to Point Sal from 10 to 60 NM.
* WHEN...Until 3 AM PDT Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
for more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Los Angeles/Oxnard CA
151 PM PDT Tue Aug 19 2025
PZZ673-676-200400-
/O.CON.KLOX.SC.Y.0131.000000T0000Z-250821T1000Z/
Waters from Pt. Sal to Santa Cruz Island CA and westward 60 nm
including San Miguel and Santa Rosa Islands-
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands-
151 PM PDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT
THURSDAY...
* WHAT...Hazardous sea conditions. Localized gusts to 35 kts
around Point Conception and south of the Channel Islands to San
Nicolas Island tonight from 6 PM to midnight.
* WHERE...Waters from Pt. Sal to Santa Cruz Island CA and
westward 60 nm including San Miguel and Santa Rosa Islands and
Outer waters from Santa Cruz Island to San Clemente Island to
60 NM offshore including San Nicolas and Santa Barbara Islands.
* WHEN...Until 3 AM PDT Thursday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...See the Coastal Waters Forecast (CWFLOX)
for more.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
900 AM PDT Tue Aug 19 2025
PZZ565-200000-
/O.CON.KMTR.SC.Y.0150.000000T0000Z-250820T1600Z/
Coastal Waters from Point Pinos to Point Piedras Blancas
California out to 10 NM-
900 AM PDT Tue Aug 19 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT
WEDNESDAY...
* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt
expected.
* WHERE...Coastal Waters from Point Pinos to Point Piedras
Blancas California out to 10 NM.
* WHEN...Until 9 AM PDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Fire Weather Watch
URGENT - FIRE WEATHER MESSAGE
National Weather Service Hanford CA
641 AM PDT Tue Aug 19 2025
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
SATURDAY EVENING FOR FRAZIER PARK AND GRAPEVINE AREAS IN KERN
COUNTY DUE TO LOW HUMIDITY AND LOCALLY BREEZY WINDS...
.Hotter temperatures will arrive Wednesday and last until the
weekend, with the hottest temperatures expected Friday and
Saturday. Thunderstorms are also possible by Friday afternoon and
will last into the upcoming weekend. Any fires that develop may
be subject to strong to extreme fire behavior due to the
combination of dry fuels, breezy winds, and low relative
humidity. Outflows from distant thunderstorms will be capable of
producing gusty and erratic winds.
CAZ597-192145-
/O.CON.KHNX.FW.A.0002.250820T1600Z-250824T0400Z/
Fort Tejon-
641 AM PDT Tue Aug 19 2025
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH SATURDAY EVENING FOR LOW HUMIDITY AND LOCALLY BREEZY WINDS
FOR THE FRAZIER PARK AND GRAPEVINE AREAS IN KERN COUNTY...
* AFFECTED AREA...Fire weather zone 597 Fort Tejon, including
the Frazier Park and Grapevine areas.
* WIND...Southerly winds 10-15 mph with gusts 25 to 30 mph
possible at times.
* HUMIDITY...Minimum values around 8 to 15 percent with the
lowest values expected Wednesday and Thursday.
* THUNDERSTORMS...Isolated thunderstorms may develop on Friday
until Sunday and produce gusty and erratic outflow winds.
Isolated dry lightning is also possible.
* IMPACTS...Any fires that develop will likely spread rapidly.
Outdoor burning is not recommended.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.
&&
$$
SM
