Alert archive / California / Heat Advisories in 2021
Heat Advisory 7, NWS Los Angeles, CA
NWS Los Angeles, CA issued this heat advisory at Aug 3, 2021, 8:02 PM PDT for Santa Barbara County, California. It was in force for 24 hr.
The area
The counties it named.
The facts
- Issued
- Aug 3, 2021, 8:02 PM PDT (03:02 UTC)
- Expired
- Aug 4, 2021, 8:00 PM PDT
- In force
- 24 hr
- Issued by
- NWS Los Angeles, CA
County Santa Barbara County, CA
The radar
The Vandenberg AFB radar (KVBX), 47 km from the middle of the area, began a volume at 03:01 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
Vandenberg AFB, CA (KVBG), launched 00:00Z, 3.0 hours before the alert went out and 48 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2035 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
745 WWUS76 KLOX 040302 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 802 PM PDT Tue Aug 3 2021 CAZ038-041000- /O.EXP.KLOX.HT.Y.0006.000000T0000Z-210804T0300Z/ /O.NEW.KLOX.HT.Y.0007.210804T0302Z-210805T0300Z/ Cuyama Valley- Including the city of Cuyama 802 PM PDT Tue Aug 3 2021 ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM PDT WEDNESDAY... * WHAT...Hot conditions with temperatures of 98 to 106 degrees expected. * WHERE...Cuyama Valley. * WHEN...Until 8 PM PDT Wednesday. * 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. && $$ CAZ059-041000- /O.CON.KLOX.EH.W.0004.000000T0000Z-210805T0300Z/ Antelope Valley- Including the cities of Lancaster and Palmdale 802 PM PDT Tue Aug 3 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... * WHAT...Dangerously hot conditions with temperatures of 104 to 108 expected. Overnight temperatures will range between 74 and 80 degrees. Warmest in the foothills. * WHERE...Antelope Valley. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ052-041000- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ /O.CON.KLOX.WI.Y.0083.000000T0000Z-210804T1000Z/ Santa Barbara County Mountains- Including the cities of San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 802 PM PDT Tue Aug 3 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT WEDNESDAY... * WHAT...Areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected late this afternoon through early Wednesay morning. Strongest winds from Gaviota to San Marcos Pass. For the heat advisory, expect hot conditions with temperatures of 96 to 106 degrees expected. Overnight temperatures 70 to 80 degrees across warmest locations. * WHERE...Santa Barbara County Mountains. * WHEN...For the Heat Advisory, until 8 PM PDT Wednesday. For the Wind Advisory, until 3 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. 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. && $$ CAZ088-547-041000- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 802 PM PDT Tue Aug 3 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... * WHAT...Hot conditions with temperatures of 97 to 107 degrees expected. Overnight temperatures up to 70 to 75 degrees across warmest locations. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ053-054-041000- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Ventura County Mountains- Los Angeles County Mountains excluding the Santa Monica Range- Including the cities of Lockwood Valley, Mount Pinos, Acton, Mount Wilson, and Sandberg 802 PM PDT Tue Aug 3 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... * WHAT...Hot conditions with temperatures of 96 to 106 degrees expected across lower elevations. Overnight temperatures 70 to 80 degrees across warmest locations. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, 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. 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. && $$ CAZ046-041000- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Monica Mountains Recreational Area- 802 PM PDT Tue Aug 3 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY... * WHAT...Hot conditions with temperatures of 95 to 105 degrees expected. Overnight temperatures 70 to 75 degrees across warmest locations. * WHERE...Santa Monica Mountains. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ039-041000- /O.CON.KLOX.WI.Y.0083.000000T0000Z-210804T1000Z/ Santa Barbara County South Coast- Including the cities of Santa Barbara, Montecito, and Carpinteria 802 PM PDT Tue Aug 3 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT WEDNESDAY... * WHAT...Areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected late this afternoon through early Wednesday morning. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County South Coast. * WHEN...Until 3 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ Hall
4 follow-up statements
947 WWUS76 KLOX 041009 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 309 AM PDT Wed Aug 4 2021 CAZ052-042315- /O.EXP.KLOX.WI.Y.0083.000000T0000Z-210804T1000Z/ /O.NEW.KLOX.WI.Y.0084.210804T2200Z-210805T1000Z/ /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Barbara County Mountains- Including the cities of San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 309 AM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... ...WIND ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 3 AM PDT THURSDAY... * WHAT...For the Heat Advisory, temperatures up to 100. For the Wind Advisory, areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County Mountains. * WHEN...For the Heat Advisory, until 8 PM PDT this evening. For the Wind Advisory, from 3 PM this afternoon to 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. 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. && $$ CAZ039-042315- /O.EXP.KLOX.WI.Y.0083.000000T0000Z-210804T1000Z/ /O.NEW.KLOX.WI.Y.0084.210804T2200Z-210805T1000Z/ Santa Barbara County South Coast- Including the cities of Santa Barbara, Montecito, and Carpinteria 309 AM PDT Wed Aug 4 2021 ...WIND ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO 3 AM PDT THURSDAY... * WHAT...Areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County South Coast. * WHEN...From 3 PM this afternoon to 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ059-042315- /O.CON.KLOX.EH.W.0004.000000T0000Z-210805T0300Z/ Antelope Valley- Including the cities of Lancaster and Palmdale 309 AM PDT Wed Aug 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions with temperatures of 104 to 108 expected. Overnight temperatures will range between 74 and 80 degrees. Warmest in the foothills. * WHERE...Antelope Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ038-042315- /O.CON.KLOX.HT.Y.0007.000000T0000Z-210805T0300Z/ Cuyama Valley- Including the city of Cuyama 309 AM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 98 to 106 degrees expected. * WHERE...Cuyama Valley. * 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. && $$ CAZ088-547-042315- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 309 AM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 97 to 107 degrees expected. Overnight temperatures up to 70 to 75 degrees across warmest locations. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ053-054-042315- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Ventura County Mountains- Los Angeles County Mountains excluding the Santa Monica Range- Including the cities of Lockwood Valley, Mount Pinos, Acton, Mount Wilson, and Sandberg 309 AM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 96 to 106 degrees expected across lower elevations. Overnight temperatures 70 to 80 degrees across warmest locations. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, 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. 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. && $$ CAZ046-042315- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Monica Mountains Recreational Area- 309 AM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 95 to 105 degrees expected. Overnight temperatures 70 to 75 degrees across warmest locations. * WHERE...Santa Monica Mountains. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
505 WWUS76 KLOX 042312 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 412 PM PDT Wed Aug 4 2021 CAZ059-050300- /O.CON.KLOX.EH.W.0004.000000T0000Z-210805T0300Z/ Antelope Valley- Including the cities of Lancaster and Palmdale 412 PM PDT Wed Aug 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions with temperatures of 104 to 108 expected. Overnight temperatures will range between 74 and 80 degrees. Warmest in the foothills. * WHERE...Antelope Valley. * WHEN...Until 8 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. 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. && $$ CAZ052-050715- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ /O.CON.KLOX.WI.Y.0084.000000T0000Z-210805T1000Z/ Santa Barbara County Mountains- Including the cities of San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 412 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY... * WHAT...For the Heat Advisory, temperatures up to 100. For the Wind Advisory, areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County Mountains. * WHEN...For the Heat Advisory, until 8 PM PDT this evening. For the Wind Advisory, until 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ038-050300- /O.CON.KLOX.HT.Y.0007.000000T0000Z-210805T0300Z/ Cuyama Valley- Including the city of Cuyama 412 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 98 to 106 degrees expected. * WHERE...Cuyama Valley. * 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. && $$ CAZ088-547-050300- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 412 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 97 to 107 degrees expected. Overnight temperatures up to 70 to 75 degrees across warmest locations. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ053-054-050300- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Ventura County Mountains- Los Angeles County Mountains excluding the Santa Monica Range- Including the cities of Lockwood Valley, Mount Pinos, Acton, Mount Wilson, and Sandberg 412 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 96 to 106 degrees expected across lower elevations. Overnight temperatures 70 to 80 degrees across warmest locations. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, 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. 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. && $$ CAZ046-050300- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Monica Mountains Recreational Area- 412 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 95 to 105 degrees expected. Overnight temperatures 70 to 75 degrees across warmest locations. * WHERE...Santa Monica Mountains. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ039-050715- /O.CON.KLOX.WI.Y.0084.000000T0000Z-210805T1000Z/ Santa Barbara County South Coast- Including the cities of Santa Barbara, Montecito, and Carpinteria 412 PM PDT Wed Aug 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY... * WHAT...Areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County South Coast. * WHEN...Until 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
077 WWUS76 KLOX 042329 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 429 PM PDT Wed Aug 4 2021 CAZ059-050300- /O.CON.KLOX.EH.W.0004.000000T0000Z-210805T0300Z/ Antelope Valley- Including the cities of Lancaster and Palmdale 429 PM PDT Wed Aug 4 2021 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Dangerously hot conditions with temperatures of 104 to 108 expected. Overnight temperatures will range between 74 and 80 degrees. Warmest in the foothills. * WHERE...Antelope Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ052-050730- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ /O.CON.KLOX.WI.Y.0084.000000T0000Z-210805T1000Z/ Santa Barbara County Mountains- Including the cities of San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 429 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY... * WHAT...For the Heat Advisory, temperatures up to 100. For the Wind Advisory, areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County Mountains. * WHEN...For the Heat Advisory, until 8 PM PDT this evening. For the Wind Advisory, until 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. 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. && $$ CAZ038-050300- /O.CON.KLOX.HT.Y.0007.000000T0000Z-210805T0300Z/ Cuyama Valley- Including the city of Cuyama 429 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 98 to 106 degrees expected. * WHERE...Cuyama Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot temperatures may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ088-547-050300- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 429 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 97 to 107 degrees expected. Overnight temperatures up to 70 to 75 degrees across warmest locations. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, 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. 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. && $$ CAZ053-054-050300- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Ventura County Mountains- Los Angeles County Mountains excluding the Santa Monica Range- Including the cities of Lockwood Valley, Mount Pinos, Acton, Mount Wilson, and Sandberg 429 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 96 to 106 degrees expected across lower elevations. Overnight temperatures 70 to 80 degrees across warmest locations. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CAZ046-050300- /O.CON.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Monica Mountains Recreational Area- 429 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * WHAT...Hot conditions with temperatures of 95 to 105 degrees expected. Overnight temperatures 70 to 75 degrees across warmest locations. * WHERE...Santa Monica Mountains. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hot conditions will increase the risk for heat- related illness for sensitive populations including the very young, the very old, 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. 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. && $$ CAZ039-050730- /O.CON.KLOX.WI.Y.0084.000000T0000Z-210805T1000Z/ Santa Barbara County South Coast- Including the cities of Santa Barbara, Montecito, and Carpinteria 429 PM PDT Wed Aug 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY... * WHAT...Areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County South Coast. * WHEN...Until 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
261 WWUS76 KLOX 050255 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 755 PM PDT Wed Aug 4 2021 CAZ059-050400- /O.EXP.KLOX.EH.W.0004.000000T0000Z-210805T0300Z/ Antelope Valley- Including the cities of Lancaster and Palmdale 755 PM PDT Wed Aug 4 2021 ...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING... Temperatures are expected to subside below warning levels. $$ CAZ052-051000- /O.EXP.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ /O.CON.KLOX.WI.Y.0084.000000T0000Z-210805T1000Z/ Santa Barbara County Mountains- Including the cities of San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 755 PM PDT Wed Aug 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY... ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... * WHAT...North winds 5 to 15 mph. * WHERE...Santa Barbara County Mountains. * WHEN...For the Heat Advisory, until 8 PM PDT this evening. For the Wind Advisory, until 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ038-050400- /O.EXP.KLOX.HT.Y.0007.000000T0000Z-210805T0300Z/ Cuyama Valley- Including the city of Cuyama 755 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... Temperatures are expected to subside below advisory levels. $$ CAZ088-547-050400- /O.EXP.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 755 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... Temperatures are expected to subside below advisory levels. $$ CAZ053-054-050400- /O.EXP.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Ventura County Mountains- Los Angeles County Mountains excluding the Santa Monica Range- Including the cities of Lockwood Valley, Mount Pinos, Acton, Mount Wilson, and Sandberg 755 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... Temperatures are expected to subside below advisory levels. $$ CAZ046-050400- /O.EXP.KLOX.HT.Y.0006.000000T0000Z-210805T0300Z/ Santa Monica Mountains Recreational Area- 755 PM PDT Wed Aug 4 2021 ...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING... Temperatures are expected to subside below advisory levels. $$ CAZ039-051000- /O.CON.KLOX.WI.Y.0084.000000T0000Z-210805T1000Z/ Santa Barbara County South Coast- Including the cities of Santa Barbara, Montecito, and Carpinteria 755 PM PDT Wed Aug 4 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT THURSDAY... * WHAT...Areas of northwest to north winds 20 to 35 mph with gusts up to 45 mph expected. Strongest winds from Gaviota to San Marcos Pass. * WHERE...Santa Barbara County South Coast. * WHEN...Until 3 AM PDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects and make driving difficult, especially for high profile vehicles. This includes Highways 101, as well as the Gaviota and San Marcos Passes. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Los Angeles, CA wrote its last area forecast discussion before this heat advisory went out at Aug 3, 6:00 PM PDT, 2 hours 2 minutes earlier.
Area forecast discussion, Aug 3, 6:00 PM PDT, 2 hours 2 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
600 PM PDT Tue Aug 3 2021
.SYNOPSIS...03/152 PM.
Expect fair weather through the week, with high temperatures six to
twelve degrees above normal for many areas through Wednesday.
Some night and morning low clouds and dense fog may affect some
coastal areas over the next few days. Gusty afternoon and evening
winds along with lower humidities will elevate the fire risk,
mainly focused across the mountains, Antelope Valley and the Santa
Barbara South Coast and adjacent foothills through late week.
&&
.SHORT TERM (TDY-FRI)...03/149 PM.
Patchy low clouds persisted along the SBA County Central Coast
early this afternoon, otherwise mostly sunny skies prevailed
across the region, with little change expected thru sunset.
The main concern across region this afternoon is the building
heat thanks to a 595-596 dm H5 high centered along the
southeastern CA/NV border and generally weak onshore gradients.
High temps will be a few degrees warmer than yesterday for most
areas, with excessive heat warnings in effect for the Antelope
Vly, and Heat Advisories in effect for much of the mtns, Santa
Clarita Vly, San Fernando Vly, Santa Monica Mtns and Cuyama Vly.
Temps are forecast to reach up to 109 deg in the Antelope Vly, up
to 107 deg in the vlys and lower mtns. Other vlys will reach into
the low 100s this afternoon, with lower 90s expected for the
inland coastal areas of L.A. County including downtown Los
Angeles. There is also the chance a few record highs could be tied
or set today.
In addition, northerly gradients across SBA County will increase
again this evening, with strong and gusty NW-N winds up to 45 mph
expected below and through the passes and canyons mainly west of
Goleta. As a result, a Wind Advisory is in effect for the SBA
County S coast and mtns from later this afternoon thru late
tonight.
The upper level ridging with H5 heights around 593-595 dm can be
expected over SW CA thru Wed. An upper level trof is expected to
move into nrn CA later Wed night into Thu which will weaken the
upper level ridge over srn CA altho H5 heights will still be in
the 591-594 dm range from N-S across the forecast area Thu
afternoon. Very weak upper level troffiness is expected into Fri
with H5 heights lowering only to around 591-592 dm.
Low clouds and fog are expected to affect the Central Coast into
the Santa Ynez Vly tonight into Wed morning, then expand to the
VTU/L.A. County coastal areas Wed night into Thu morning, and
again Thu night into Fri morning. Otherwise, skies over the region
will be mostly clear thru the period.
Another hot day for inland areas is expected on Wed with the
Excessive Heat Warning and Heat Advisories continuing for much of
the area that encompasses the Warning and Advisories today. Please
see the latest Non-Precipitation Weather Message (LAXNPWLOX) for
further details. Otherwise, temps will continue well above normal
across the region on Wed. Stronger onshore flow and the weakening
upper level ridge on Thu will allow for high temps to cool about
3-6 deg, but remain several deg above normal for many areas away
from the coast, then little change in temperatures are expected on
Fri.
Gusty sundowner winds, especially west of Goleta, will continue
each evening thru Thu as well, and additional Wind Advisories may
eventually be needed for the SBA County S coast and mtns.
.LONG TERM (SAT-TUE)...03/151 PM.
Both the EC and GFS forecast upper level ridging extending into
srn CA from the E persisting Fri thru Mon. H5 heights over the
forecast area should generally be in the 591 to 592 dm range thru
the period, with weak mainly southerly flow aloft. It looks like
monsoonal moisture will remain well E and SE of the forecast area
as well.
Increasing onshore gradients to the N and E are forecast thru the
extended period. This will help to gradually expand night and
morning low clouds and fog across the coastal areas as well as
into some of the adjacent vlys. Otherwise, mostly clear skies will
continue. Temps Sat thru Tue will generally be a few degrees
below normal for the coast and adjacent vlys, and near to a few
degrees above normal for the far interior vlys, mtns and deserts.
Even so, it looks like Sat will be the warmest day overall during
the extended period.
&&
.AVIATION...04/0044Z.
At 20Z, the marine layer depth around was 500 feet deep at KLAX.
The top of the inversion was around 2700 feet with a temperature
of 29 degrees Celsius.
High confidence in the current forecast for valley and desert
terminals. Moderate confidence in the current forecast for coastal
terminals. There is a moderate-to-high (30-60 percent) chance of
LIFR conditions at coastal terminals, highest along the Central
Coast. Otherwise, VFR conditions are expected through the period.
KLAX... There is a 30-40 percent chance of LIFR conditions
between 08Z and 16Z, highest between 10Z and 16Z. Otherwise, VFR
conditions are expected through the period.
KBUR...VFR conditions are expected through the period. No wind
impacts are expected at this time.
&&
.MARINE...03/125 PM.
High confidence in very short period and choppy seas continuing
over most of the coastal waters through most of the week. Heights
will build some through the week. A noticeable long period modest
south swell will continue to build in through Thursday.
Outer Waters...Good confidence for continued Small Craft Advisory
(SCA) level wind gusts from Point Conception to areas south and
west to San Nicolas Island through at least Wednesday afternoon.
Decided to extend the Gale Watch for the southern two outer
waters sections through Thursday night. A Gale Watch may
eventually need to be issued for the northern outer waters as
well.
Inner Waters N of Point Sal...Good confidence that SCA level gusts
will develop by mid afternoon and continue a few hours past
midnight. There is a 60% chance that this pattern will continue
each afternoon through midnight each day through at least
Thursday.
Inner Waters S of Point Conception (SoCal Bight)... Good
confidence for SCA level gusts across the western portion of the
Santa Barbara Channel each afternoon to around midnight each day
through at least Wednesday and possibly for Thursday. There is a
40% chance for SCA for wind gusts each afternoon and evening hours
from Anacapa Island to the Santa Monica Bay, and 30% across the
San Pedro Channel.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
CA...Heat Advisory in effect until 8 PM PDT this evening for zone
38. (See LAXNPWLOX).
Wind Advisory in effect until 3 AM PDT Wednesday for zones
39-52. (See LAXNPWLOX).
Heat Advisory in effect until 8 PM PDT Wednesday for zones
46-52>54-88-547. (See LAXNPWLOX).
Excessive Heat Warning in effect until 8 PM PDT Wednesday for
zone 59. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 3 AM PDT Wednesday for
zones 645-650. (See LAXMWWLOX).
Small Craft Advisory in effect until 3 AM PDT Thursday for
zone 670. (See LAXMWWLOX).
Small Craft Advisory in effect until 3 PM PDT Wednesday for
zones 673-676. (See LAXMWWLOX).
Gale Watch in effect from Wednesday afternoon through late
Wednesday night for zones 673-676. (See LAXMWWLOX).
&&
.HAZARD POTENTIAL OUTLOOK (FRI-TUE).
Gusty Sundowner winds will impact the canyons and passes in
southern Santa Barbara County Thursday night.
&&
PUBLIC...Sirard
AVIATION...Hall
MARINE...Sweet
SYNOPSIS...CK/Sirard
weather.gov/losangelesThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 2:08 AM PDT | Gale Warning | LOX | 49 hr | |
| Aug 4, 2:08 AM PDT | Small Craft Advisory | LOX | 24 hr | |
| Aug 4, 3:09 AM PDT | Wind Advisory | LOX | 24 hr | |
| Aug 4, 1:36 PM PDT | Gale Watch | LOX | 12 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.