Strong high pressure centered over the Great Basin brought a strong round of Santa Ana winds to Southern California on November 20-21. Numerous damage reports were observed on the morning of November 20th, with very strong peak winds observed starting late in the evening on the 20th and running through the morning of the 21st.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 20-NOV-23 21:00:00 to 21-NOV-23 12:00:00 (PST-8)
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across the San Diego County Mountains starting on the evening of November 20th and lasting through the morning and early afternoon hours on the 21st. The Sill Hill San Diego Gas and Electric (SDGE) Mesonet site recorded a peak wind gust of 80 mph, while the Big Black Mountain site recorded a peak wind gust of 70 mph. Other high peak winds include 68 mph at the Boulder Creek SDGE site, 68 mph at Boucher Hill, and 66 mph at the Mount Laguna Observatory.

High Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 20-NOV-23 21:00:00 to 21-NOV-23 12:00:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across portions of the San Diego County Valleys, mainly in the coastal mountain slopes and foothills, starting on the evening of November 20th and lasting through the morning and early afternoon hours on the 21st. The Hellhole Canyon San Diego Gas and Electric (SDGE) Mesonet site recorded a peak wind gust of 70 mph, while the Hauser Mountain site recorded a peak wind gust of 69 mph. Other high peak wind gusts include 66 mph at the Otay Mountain RAWS site, 65 mph at the Alpine RAWS site, and 60 mph at the East Willows SDGE site.

High Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 21:00:00 to 21-NOV-23 12:00:00 (PST-8)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across portions of the Inland Empire starting on the evening of November 20th and lasting through the morning and early afternoon hours on the 21st. The Highland Springs mesonet site recorded a peak wind gust of 65 mph, while the Devil Canyon SoCal-Edison site recorded a peak wind gust of 64 mph. Other high peak wind gusts include 63 mph at the Devore SoCal-Edison site, 62 mph at Rialto, and 60 mph at Rancho Cucamonga.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 20-NOV-23 21:00:00 to 21-NOV-23 12:00:00 (PST-8)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across portions of the San Bernardino County Mountains starting on the evening of November 20th and lasting through the morning and early afternoon hours on the 21st. The Marshall Peak mesonet site recorded a peak wind gust of 69 mph, while the Arrowhead Springs SoCal-Edison site recorded a peak wind gust of 66 mph.

Strong Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 21-NOV-23 09:00:00 to 21-NOV-23 09:00:00 (PST-8)
Magnitude: 27.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Large branch downed by wind near the intersection of Rice Canyon Rd and Clearwater Rd east of I-15. SDGE Rainbow Heights gusted 31 mph at 630 am.

Strong Wind in ORANGE COUNTY COASTAL, CALIFORNIA
From 20-NOV-23 08:00:00 to 20-NOV-23 09:30:00 (PST-8)
Magnitude: 42.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Local Official

An aircraft at John Wayne International Airport was taxiing onto the runway when a gust of wind flipped the aircraft over on RY2L. Peak wind 42 knots or 48 mph at 9:22 AM. Time of report was 8:48 am PST with NE wind gust 36 mph.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 13:20:00 to 20-NOV-23 13:20:00 (PST-8)
Magnitude: 44.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Two semis were reported to have flipped on their side near 14210 Whittram Ave in Fontana, blocking lanes. SCE Declezville had gusts 51 mph at noon and 1:20 PM.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 12:45:00 to 20-NOV-23 12:45:00 (PST-8)
Magnitude: 43.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Compromised utility pole from high winds near Lurelane St and Fillmore Ave in Rialto. The Bench Union Pacific observation reported gusts 50 mph from Santa Ana winds.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 09:15:00 to 20-NOV-23 09:15:00 (PST-8)
Magnitude: 43.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Department of Highways

Big rig flipped and major traffic issues at SR 60 and I-15 connector on trans road near Onatrio. Hard closure by CHP. CWOP Eastvale gusted to 49 mph at 9:22 am.

High Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 10:17:00 to 20-NOV-23 10:17:00 (PST-8)
Magnitude: 58.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Powerlines blown down on lanes 14854 Iris Dr. near Fontana. Jurupa Hills SCE had gusts 55 to 67 mph.

High Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 20-NOV-23 21:00:00 to 21-NOV-23 12:00:00 (PST-8)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

High winds occurred across the Santa Ana Mountains and Foothills starting on the evening of November 20th and lasting through the morning and early afternoon hours on the 21st. The Fremont Canyon RAWS site recorded a peak wind gust of 66 mph, while the Santiago Peak observation site recorded a peak wind gust of 62 mph and the Pleasants Peak site recorded a gust of 56 mph.

High Wind in SAN GORGONIO PASS NEAR BANNING, CALIFORNIA
From 20-NOV-23 21:00:00 to 21-NOV-23 12:00:00 (PST-8)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds occurred across the San Gorgonio Pass starting on the evening of November 20th and lasting through the morning and early afternoon hours on the 21st. The SoCal-Edison mesonet site in Banning recorded a peak wind gust of 67 mph, while the Beaumont site recorded a peak gust of 57 mph.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 07:30:00 to 20-NOV-23 08:00:00 (PST-8)
Magnitude: 35.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Reports of power lines down in the road at the intersection of Reche Canyon Rd and Placid Ln near Loma Linda. Wind gusts at and just before time of report were 35 to 40 mph.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 07:30:00 to 20-NOV-23 08:00:00 (PST-8)
Magnitude: 46.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Semi overturned at I-215 N and Devore Road, leading to a hard closure on I-215 northbound at 8 am. Glen Helen SCE gusts 53 mph Santa Ana wind.

Strong Wind in ORANGE COUNTY COASTAL, CALIFORNIA
From 20-NOV-23 07:30:00 to 20-NOV-23 08:00:00 (PST-8)
Magnitude: 35.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Tree in the road near SR 55 N and SR 22 W in Orange and North Tustin area. Winds around time of the event were 35 to 40 mph.

Strong Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 20-NOV-23 08:30:00 to 20-NOV-23 09:00:00 (PST-8)
Magnitude: 41.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

CalTrans report of power lines down across the roadway on Linden Ave in Rialto. Power pole was swaying. West Colton SCE gust 47 mph from Santa Ana wind.

Strong Wind in ORANGE COUNTY COASTAL, CALIFORNIA
From 20-NOV-23 09:30:00 to 20-NOV-23 10:00:00 (PST-8)
Magnitude: 39.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Construction sign blew over due to wind at I-405 South and Macarthur Blvd offramp.  Wind gusts 45 mph at KSNA John Wayne airport.

Strong Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 20-NOV-23 10:00:00 to 20-NOV-23 10:30:00 (PST-8)
Magnitude: 45.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

A large tree was blown down at 28272 Bond Way in Silverado. Santa Ana winds gusted to 52 mph at SCE Silverado.