Alert archive / California / High Wind Watches in 2021
High Wind Watch 1, NWS Los Angeles, CA
NWS Los Angeles, CA issued this high wind watch at Jan 16, 2021, 6:42 PM PST for Los Angeles County, California. It took effect at Jan 18, 2021, 10:00 PM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jan 16, 2021, 6:42 PM PST (02:42 UTC)
- In effect from
- Jan 18, 2021, 10:00 PM PST
- Expired
- Jan 18, 2021, 3:23 AM PST
- In force
- Issued by
- NWS Los Angeles, CA
County Los Angeles County, CA
The radar
The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 02:48 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
San Diego, CA (KNKX), launched 00:00Z, 2.7 hours before the alert went out and 184 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
- 4533 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
407 WWUS76 KLOX 170242 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 642 PM PST Sat Jan 16 2021 CAZ053-054-171300- /O.NEW.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ 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 642 PM PST Sat Jan 16 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST SUNDAY... ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 25 to 35 mph with gusts of 50 to 55 mph. For the High Wind Watch, northeast winds 40 to 50 mph with gusts of 65 to 80 mph possible, strongest through the Los Angeles County Mountains. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ088-547-171300- /O.NEW.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 642 PM PST Sat Jan 16 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST SUNDAY... ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts of 40 to 50 mph. For the High Wind Watch, northeast winds 30 to 50 mph with gusts to 70 mph possible. Strongest winds in the foothills and in the Western San Fernando Valley. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ044-045-171300- /O.NEW.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- Including the cities of Santa Paula, Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, and Newbury Park 642 PM PST Sat Jan 16 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST SUNDAY... ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts up to 50 mph. For the High Wind Watch, northeast winds 35 to 50 mph with gusts up to 70 mph possible. * WHERE...Ventura County Interior Valleys and Ventura County Coastal Valleys. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ046-171300- /O.NEW.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ Santa Monica Mountains Recreational Area- 642 PM PST Sat Jan 16 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST SUNDAY... ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts up to 50 mph. For the High Wind Watch, northeast winds 35 to 55 mph with gusts up to 75 mph possible. * WHERE...Santa Monica Mountains. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ040-041-171300- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2000Z/ Ventura County Coast- Los Angeles County Coast including Downtown Los Angeles- Including the cities of Ventura, Oxnard, Camarillo, Malibu, Santa Monica, Beverly Hills, Hollywood, and Long Beach 642 PM PST Sat Jan 16 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON PST SUNDAY... * WHAT...Areas of north to northeast winds 15 to 30 mph with gusts to 40 mph are expected. * WHERE...Ventura County Coast and the coastal strip of Los Angeles County Coast from Malibu to West Los Angeles. * WHEN...Until noon PST Sunday. * 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. && $$ CAZ548-171300- /O.NEW.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona 642 PM PST Sat Jan 16 2021 ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 30 to 45 mph with gusts 55 to 60 mph possible. Strongest in the foothills and the western valley. * WHERE...San Gabriel Valley. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ Smith/Phillips
4 follow-up statements
694 WWUS76 KLOX 171227 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 427 AM PST Sun Jan 17 2021 CAZ053-054-172015- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ 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 427 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 25 to 35 mph with gusts of 50 to 55 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 40 to 50 mph with gusts of 65 to 80 mph possible, strongest through the Los Angeles County Mountains. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ088-547-172015- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 427 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts of 40 to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 30 to 50 mph with gusts to 70 mph possible. Strongest winds in the foothills and in the Western San Fernando Valley. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ044-045-172015- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- Including the cities of Santa Paula, Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, and Newbury Park 427 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts up to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 35 to 50 mph with gusts up to 70 mph possible. * WHERE...Ventura County Interior Valleys and Ventura County Coastal Valleys. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ046-172015- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Santa Monica Mountains Recreational Area- 427 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts up to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 35 to 55 mph with gusts up to 75 mph possible. * WHERE...Santa Monica Mountains. * WHEN...For the Wind Advisory, until 3 PM PST Sunday. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ040-041-172000- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2000Z/ Ventura County Coast- Los Angeles County Coast including Downtown Los Angeles- Including the cities of Ventura, Oxnard, Camarillo, Malibu, Santa Monica, Beverly Hills, Hollywood, and Long Beach 427 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY... * WHAT...Areas of north to northeast winds 15 to 30 mph with gusts to 40 mph are expected. * WHERE...Ventura County Coast and the coastal strip of Los Angeles County Coast from Malibu to West Los Angeles. * WHEN...Until noon PST Sunday. * 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. && $$ CAZ548-172015- /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona 427 AM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 30 to 45 mph with gusts 55 to 60 mph possible. Strongest in the foothills and the western valley. * WHERE...San Gabriel Valley. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ Kaplan
014 WWUS76 KLOX 171941 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 1141 AM PST Sun Jan 17 2021 CAZ040-180345- /O.EXP.KLOX.WI.Y.0008.000000T0000Z-210117T2000Z/ /O.EXA.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Ventura County Coast- Including the cities of Ventura, Oxnard, and Camarillo 1141 AM PST Sun Jan 17 2021 ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... ...WIND ADVISORY WILL EXPIRE AT NOON PST TODAY... * WHAT...Northeast winds 25 to 45 mph with gusts between 55 and 65 mph possible. * WHERE...Ventura County Coast. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ041-180345- /O.EXP.KLOX.WI.Y.0008.000000T0000Z-210117T2000Z/ /O.EXA.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Los Angeles County Coast including Downtown Los Angeles- Including the cities of Malibu, Santa Monica, Beverly Hills, Hollywood, and Long Beach 1141 AM PST Sun Jan 17 2021 ...HIGH WIND WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... ...WIND ADVISORY WILL EXPIRE AT NOON PST TODAY... * WHAT...North to northeast winds 25 to 45 mph with gusts between 55 and 65 mph possible. * WHERE...Los Angeles County Coast from Malibu to the Hollywood Hills. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ053-054-180345- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ 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 1141 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 25 to 35 mph with gusts of 40 to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 40 to 55 mph with gusts of 60 to 80 mph possible, strongest through the Los Angeles County Mountains. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...For the Wind Advisory, until 3 PM PST this afternoon. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ088-547-180345- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 1141 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts of 40 to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 30 to 50 mph with gusts to 70 mph possible. Strongest winds in the foothills and in the Western San Fernando Valley. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...For the Wind Advisory, until 3 PM PST this afternoon. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ046-180345- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Santa Monica Mountains Recreational Area- 1141 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts up to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 35 to 55 mph with gusts up to 75 mph possible. * WHERE...Santa Monica Mountains. * WHEN...For the Wind Advisory, until 3 PM PST this afternoon. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ044-045-180345- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- Including the cities of Santa Paula, Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, and Newbury Park 1141 AM PST Sun Jan 17 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 PM PST THIS AFTERNOON... ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...For the Wind Advisory, northeast winds 20 to 30 mph with gusts up to 50 mph. Winds diminishing through the afternoon. For the High Wind Watch, northeast winds 35 to 50 mph with gusts up to 75 mph possible. * WHERE...Ventura County Interior Valleys and Ventura County Coastal Valleys. * WHEN...For the Wind Advisory, until 3 PM PST this afternoon. For the High Wind Watch, from Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ051-052-180345- /O.EXB.KLOX.HW.A.0001.210119T1200Z-210120T1200Z/ San Luis Obispo County Mountains-Santa Barbara County Mountains- Including the cities of Black Mountain, San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 1141 AM PST Sun Jan 17 2021 ...HIGH WIND WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 30 to 50 mph with gusts up to 70 mph possible. * WHERE...San Luis Obispo County Mountains and Santa Barbara County Mountains. * WHEN...From late Monday night through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS... PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ548-180345- /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona 1141 AM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 30 to 45 mph with gusts 55 to 60 mph possible. Strongest in the foothills and the western valley. * WHERE...San Gabriel Valley. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ RAT
306 WWUS76 KLOX 172219 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 219 PM PST Sun Jan 17 2021 CAZ053-054-181200- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ 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 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 40 to 55 mph with gusts of 60 to 80 mph possible, strongest through the Los Angeles County Mountains. * WHERE...Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ088-547-181200- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...North to northeast winds 30 to 50 mph with gusts to 70 mph possible. Strongest winds in the foothills and in the Western San Fernando Valley. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ046-181200- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Santa Monica Mountains Recreational Area- 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...North to northeast winds 35 to 55 mph with gusts up to 75 mph possible. * WHERE...Santa Monica Mountains. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ044-045-181200- /O.CON.KLOX.WI.Y.0008.000000T0000Z-210117T2300Z/ /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- Including the cities of Santa Paula, Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, and Newbury Park 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 35 to 50 mph with gusts up to 75 mph possible. * WHERE...Ventura County Interior Valleys and Ventura County Coastal Valleys. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ548-181200- /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 30 to 45 mph with gusts 55 to 60 mph possible. Strongest in the foothills. * WHERE...San Gabriel Valley. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ051-052-181200- /O.CON.KLOX.HW.A.0001.210119T1200Z-210120T1200Z/ San Luis Obispo County Mountains-Santa Barbara County Mountains- Including the cities of Black Mountain, San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM LATE MONDAY NIGHT THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 30 to 50 mph with gusts up to 70 mph possible. * WHERE...San Luis Obispo County Mountains and Santa Barbara County Mountains. * WHEN...From late Monday night through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ040-181200- /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Ventura County Coast- Including the cities of Ventura, Oxnard, and Camarillo 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...Northeast winds 25 to 45 mph with gusts up to 65 mph possible. * WHERE...Ventura County Coast. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ CAZ041-181200- /O.CON.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ Los Angeles County Coast including Downtown Los Angeles- Including the cities of Malibu, Santa Monica, Beverly Hills, Hollywood, and Long Beach 219 PM PST Sun Jan 17 2021 ...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH LATE TUESDAY NIGHT... * WHAT...North to northeast winds 25 to 45 mph with gusts up to 65 mph possible. * WHERE...Los Angeles County Coast from Malibu to the Hollywood Hills. * WHEN...From Monday evening through late Tuesday night. * IMPACTS...Damaging winds could blow down large objects such as trees and power lines. Power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates on this situation. Fasten loose objects or shelter objects in a safe location prior to the onset of winds. && $$ RAT
031 WWUS76 KLOX 181123 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 323 AM PST Mon Jan 18 2021 CAZ046-053-054-190100- /O.UPG.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T0600Z-210120T1200Z/ Santa Monica Mountains Recreational Area-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 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 40 to 50 mph with gusts up to 75 mph expected. * WHERE...Santa Monica Mountains, Ventura County Mountains and Los Angeles County Mountains excluding the Santa Monica Range. * WHEN...From 10 PM this evening to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ CAZ044-045-190100- /O.UPG.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T0600Z-210120T1200Z/ Ventura County Interior Valleys-Ventura County Coastal Valleys- Including the cities of Santa Paula, Fillmore, Ojai, Piru, Thousand Oaks, Simi Valley, Moorpark, and Newbury Park 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 30 to 50 mph with gusts up to 70 mph expected. * WHERE...Ventura County Interior Valleys and Ventura County Coastal Valleys. * WHEN...From 10 PM this evening to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ CAZ088-547-190100- /O.UPG.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T0600Z-210120T1200Z/ Santa Clarita Valley-Los Angeles County San Fernando Valley- Including the cities of Santa Clarita, Newhall, Valencia, Woodland Hills, Northridge, Burbank, and Universal City 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 40 to 50 mph with gusts up to 70 mph expected. * WHERE...Santa Clarita Valley and San Fernando Valley. * WHEN...From 10 PM this evening to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ CAZ548-190100- /O.UPG.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T0600Z-210120T1200Z/ Los Angeles County San Gabriel Valley- Including the cities of Pasadena, San Gabriel, and Pomona 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...San Gabriel Valley. * WHEN...From 10 PM this evening to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ CAZ051-052-190100- /O.UPG.KLOX.HW.A.0001.210119T1200Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T1200Z-210120T1200Z/ San Luis Obispo County Mountains-Santa Barbara County Mountains- Including the cities of Black Mountain, San Marcos Pass, San Rafael Wilderness Area, and Dick Smith Wilderness Area 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 4 AM TUESDAY TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 25 to 35 mph with gusts up to 60 mph expected. * WHERE...San Luis Obispo County Mountains and Santa Barbara County Mountains. * WHEN...From 4 AM Tuesday to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ CAZ040-190100- /O.UPG.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T0600Z-210120T1200Z/ Ventura County Coast- Including the cities of Ventura, Oxnard, and Camarillo 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 30 to 50 mph with gusts up to 70 mph expected. * WHERE...Ventura County Coast. * WHEN...From 10 PM this evening to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ CAZ041-190100- /O.UPG.KLOX.HW.A.0001.210119T0600Z-210120T1200Z/ /O.NEW.KLOX.HW.W.0003.210119T0600Z-210120T1200Z/ Los Angeles County Coast including Downtown Los Angeles- Including the cities of Malibu, Santa Monica, Beverly Hills, Hollywood, and Long Beach 323 AM PST Mon Jan 18 2021 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 4 AM PST WEDNESDAY... * WHAT...Northeast winds 25 to 35 mph with gusts up to 60 mph expected. Winds strongest from Malibu to the Hollywood Hills. * WHERE...Los Angeles County Coast including Downtown Los Angeles. * WHEN...From 10 PM this evening to 4 AM PST Wednesday. * IMPACTS...Damaging winds will blow down large objects such as trees and power lines. Power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ ASR
What forecasters said that day
The local office's own words before this high wind watch 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 high wind watch went out at Jan 16, 5:59 PM PST, 43 minutes earlier.
Area forecast discussion, Jan 16, 5:59 PM PST, 43 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Los Angeles/Oxnard CA
559 PM PST Sat Jan 16 2021
.SYNOPSIS...16/213 PM.
There will be gusty north to northeast winds through Sunday and
temperatures will be well above normal. A couple of upper level
lows will bring much cooler weather beginning Monday and
continuing through the week. There is a slight chance of rain and
snow showers across the mountains of eastern Los Angeles County
late Monday night through Tuesday night. There is the potential
for very strong and damaging northeast winds Monday night into
Wednesday, especially across Los Angeles and Ventura Counties.
&&
.SHORT TERM (TDY-TUE)...16/212 PM.
Mostly sunny skies with a few hi clouds at times covered the
forecast area early this afternoon, with little change expected
thru sunset. Moderate to strong offshore pressure gradients
continued at 22Z with LAX-DAG at -5.4 mb and LAX-BFL at -7.2 mb.
These gradients were helping to contribute to gusty N to NE winds
early this afternoon mainly across the usual wind-prone areas of
VTU/L.A. Counties, strongest in the foothills and mtns. Isolated
wind gusts up to 50 mph have been noted, otherwise most wind gusts
have been in the 30 to 40 mph range. These winds will continue
thru the afternoon, and a Wind Advisory remains in effect for many
of these areas.
Temps have warmed again to record levels this afternoon, with 3
official records thus far, including Camarillo Airport at 91
degrees (old record 87 in 1961). Otherwise, temperatures across
the coast and vlys were in the 80s to near 90, with perhaps
another degree or two of warming before mid-afternoon. These highs
are 15-25 degrees above normal for this time of year.
An unseasonably strong 589 dm upper level high was about 500 NM
SW of Point Conception this afternoon. This high will drift
slowly W tonight thru Sun. H5 heights over the forecast area of
around 583-586 dm this afternoon will fall to about 582-584 dm on
Sun. A sharp upper level trof will move into northern CA Sun
night, then strengthen into an upper level low while pushing
quickly thru swrn CA Mon morning, and south to a position over or
a little SW of the SoCal Bight Mon afternoon. Another piece of
energy will push S out of the Great Basin Mon night then merge
into a large and unseasonably strong upper level low (around 542
dm) just off the nrn Baja coast on Tue.
For tonight thru Mon, mostly clear skies will continue altho there
may be a few more hi clouds at times especially by Mon. Good
offshore pressure gradients will persist to the N and E thru Sun,
with gradients to the E peaking late tonight (NAM fcst LAX-DAG -7.2
mb at 12Z Sun). Gusty N to NE winds will continue across the region
thru Sun, with the strongest winds expected tonight into Sun morning
across portions of VTU/L.A. Counties where Advisory-level winds will
be possible again. Current Wind Advisories for this area will remain
in effect thru 3 PM PST Sun. There should also be gusty N winds
developing in the L.A./VTU County mtns and vlys Mon morning thru the
afternoon, likely to Advisory levels and another Wind Advisory
will probably be needed.
Offshore pressure gradients will increase substantially Mon
night, and by 12Z Tue the NAM is fcst LAX-DAG to be -8.7 mb, a
24-hour trend of -7.4 mb. The GFS (-7.3 mb) and EC (-7.8 mb) match
up well with the NAM gradients at that time. There will be
rapidly increasing NE winds throughout the lower to mid atmosphere
along with good cold air advection, and strong negative vertical
motion that will accelerate the strong winds aloft (e,g, fcst 850
mb winds up to 70 kt, and 950 mb winds up to 60 kt) downward to
the ground. The models have been consistently forecasting
widespread strong and damaging wind event over a large part of
VTU/L.A. Counties for Monday night and Tuesday. We are gaining
more confidence that widespread sustained NE winds of 35 to 55
mph will be possible with gusts of 70 to 80 mph, strongest below
and through passes and canyons. Winds of this magnitude would
result in many downed trees and powerlines, possible widespread
power outages, and property damage. Travel will be very difficult,
particularly for high-profile vehicles. There will likely be a
High Wind Watch issued for this event sometime on Sunday. People
should already start to prepare for this potentially dangerous
wind event by securing outdoor objects and be ready for any power
outages.
There will also be wrap-around moisture from the upper level low
which is expected to bring cloudiness and a slight chance of snow
showers to the eastern San Gabriel Mtns Mon night thru Tue
evening. Otherwise, partly cloudy skies should prevail over L.A.
County during the period, with mostly clear skies elsewhere.
Temps will turn a couple of degrees cooler Sun but remain 10-20
deg or more above normal, with the warmest vlys and inland
coastal areas topping out in the 80s to around 90. The hottest
spot in the continental U.S. will certainly be somewhere in
southern California again on Sunday. Altho temps will turn much
cooler on Mon, it will remain several degrees above normal. Highs
on Mon for many vlys and coastal areas will be in the lower to mid
70s. Highs will be slightly cooler on Tue, except significantly
cooler for the mtns and deserts.
.LONG TERM (WED-SAT)...16/207 PM.
The GFS and EC are in better agreement today overall compared to
the last few days. The upper level low will persist around nrn
Baja on Wed with some wrap-around moisture lingering at least
into the morning hours over the eastern San Gabriels. The upper
level low will eject eastward rather quickly on Thu with a weak
pop-up ridge moving into srn CA. It looks like a large upper level
trof will move into central and swrn CA by Fri then linger over
the area for the most part into Sat, altho the GFS does move this
feature mostly E of the region by Sat afternoon. There should be
some pcpn moving into the area on Fri and Sat, but the EC and GFS
do not match up very well with timing and location of any pcpn,
and used NBM pops for the the extended period.
Except for some lingering snow showers possible in the L.A.
County mtns early Wed, it should be dry over the forecast area Wed
and Thu with mostly clear to partly cloudy skies. Partly to
mostly cloudy skies can be expected Fri and Sat with a slight
chance to chance of rain and mtn snow across much of the region.
There should be leftover gusty NE winds at least to Advisory
levels thru Tue evening across portions of VTU/L.A. Counties then
winds will diminish. Temps are forecast to be a few degrees above
normal Wed except near normal to a few degrees below normal in the
mtns and deserts. Above normal temps are expected most areas on
Thu, then cool significantly Fri and Sat, with highs well below
normal for many areas by Sat.
&&
.AVIATION...17/0158Z.
At 2308Z at KLAX, there was no marine layer. There was a surface-
based inversion with the top of the inversion around 1000 ft deep
and 28 degrees C.
Moderate confidence in all 00Z TAF sites with lower confidence on
timing of winds decreasing tonight. There is a chance of moderate
turbulence and LLWS near higher terrain through 03z.
KLAX...Moderate confidence in the 00Z TAF with CAVU conditions
expected. There is a 20% chance that easterly component winds will
reach or exceed 8 knots after 12z Sunday.
KBUR...Moderate confidence in the 00Z TAF with CAVU conditions
expected.
&&
.MARINE...16/1047 AM.
Across the Outer Waters...
Gusty northwest winds and hazardous seas will continue through at
least Tuesday. There is a 30 percent chance of gale winds this
afternoon and again Monday night and Tuesday. Mariners should use
extra caution crossing the Morro Bay Harbor entrance this
afternoon through Monday.
For the Inner Waters North of Point Sal...
The offshore winds from the Santa Lucia Mountains will flirt to
near SCA level gusts this morning, but seas will be over 10 feet
and hazardous seas will continue through at least Tuesday. The
wind will increase to SCA levels again Monday night and Tuesday.
For the Inner Waters South of Point Conception...
There is a 40% chance for Small Craft Advisory level northeast
offshore gusts this morning from Point Mugu to Santa Monica out to
around Anacapa Island through mid afternoon hours. There is more
confidence that SCA level gusts will develop late this evening
into Sunday for the same area. There is a high probability that
offshore NE to E winds will reach strong GALE WARNING levels as a
strong Santa Ana wind event develops Monday evening peaking
Tuesday. Hazardous seas may reach 10 feet across the western
portion of the inner Santa Barbara Channel on Monday.
East facing Harbors, such as Avalon Harbor at Catalina Island and
other east facing harbor entrances across the Channel Islands will
be affected with strong GALE winds and steep seas entering the
harbors. Mariners should stay focused on the upcoming coastal
waters forecast due to the very strong winds expected.
&&
.BEACHES...16/1039 AM.
A long period west to northwest swell will move through the
coastal waters today into early next week resulting in high surf
and dangerous rip currents on all west and northwest facing
beaches.
For the Central Coast... a large northwest swell will move into
the coastal waters through early next week, bringing two periods
of high surf. The first will be this afternoon and evening and the
second will be on Monday. There is a forty percent chance that a
High Surf Warning will be needed for the Central Coast on Monday
as dangerous surf could exceed 20 feet.
For the Los Angeles and Ventura County beaches and exposed west
facing beaches across the Santa Barbara South Coast... the surf
will be increasing to 5 to 8 feet with higher sets across Ventura
County Beaches to 10 feet. There will be dangerous rip currents.
Another potentially larger swell will bring slightly larger surf
across exposed west facing beaches on Monday.
&&
.FIRE WEATHER...16/409 PM.
Strong high pressure aloft and moderate offshore pressure gradients
will continue to bring critical fire weather conditions to portions of Los
Angeles and Ventura counties through this evening with a combination of
gusty Santa Ana winds. record breaking warm temperatures and low humidities.
The Red Flag Warning is being extended until 8 pm this evening as offshore
winds continue to remain quite gusty across the wind prone areas.
The offshore winds are expected to gradually diminish later tonight into
Sunday. However, elevated to brief critical fire weather conditions will
continue across the region. During this time, north to northeast winds are
expected to gust between 25 and 35 mph across Los Angeles and Ventura counties,
with isolated gusts up to 45 mph in the foothills and mountains. After poor
humidity recoveries in the foothills and mountains tonight, humidities are
expected to lower to between 8 and 15 percent on Sunday.
A very strong and damaging north to northeast wind event is likely between late
Monday and Wednesday morning. The strongest winds are expected to be
late Monday night into Tuesday when widespread damaging wind gusts
of 60 to 80 mph and possibly higher will be likely in the mountains,
foothills, and some valley locations in Los Angeles and Ventura
counties. Even coastal areas (including portions of the LA Basin) will
likely see locally damaging wind gusts of 50 to 60 mph. Due to the
uncertainty with the track of the upper low and the possibility of
some moisture entrainment on Tuesday, confidence remains low with
the humidity forecast. However early in the event from Monday afternoon
into Tuesday morning there's a chance that red flag conditions will
return, especially across coastal and valley portions of Los Angeles and
Ventura Counties where downslope drying will be maximized. Significant
wind impacts will be likely with this event, including the threat of widespread
downed trees and powerlines, as well as power outages. Winds are then expected
to diminish Thursday through next weekend, with a chance of precipitation
Friday through Sunday.
&&
.LOX WATCHES/WARNINGS/ADVISORIES...
CA...High Surf Advisory in effect until 10 PM PST Tuesday for
zones 34-35-39>41-87. (See LAXCFWLOX).
Wind Advisory in effect until noon PST Sunday for zones
40-41. (See LAXNPWLOX).
Wind Advisory in effect until 3 PM PST Sunday for zones
44>46-53-54-88-547. (See LAXNPWLOX).
PZ...Small Craft Advisory in effect until 3 AM PST Tuesday for
zones 645-670-673-676. (See LAXMWWLOX).
&&
.HAZARD POTENTIAL OUTLOOK (TUE-SAT).
Strong to potentially damaging Santa Ana winds are possible
Monday night into early Wednesday. High surf will continue to
affect west-facing beaches through Tuesday. Gale force winds are
possible across the inner waters Monday night through Tuesday
night.
&&
PUBLIC...Sirard
AVIATION...Phillips/Sweet
MARINE...Sweet/Kaplan
BEACHES...Sweet/Kaplan
FIRE...Gomberg
SYNOPSIS...DB/Sirard
weather.gov/losangelesThe office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 17, 2:30 AM PST | Gale Watch | LOX | 32 hr | |
| Jan 17, 2:39 PM PST | Fire Weather Watch | LOX | Los Angeles | 21 hr |
Nearby
High Wind Watches in California, 2021Every high wind watch 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.