A strong 1051 mb surface high settled over the Great Basin, resulting in strong winds through the passes and canyons of Southern California. The most widespread winds occurred on the 27th. The winds downed trees from the mountains to the coast, flipped big rigs and induced temporary road closures. Tree damage was likely augmented by saturated soils caused by heavy rains over the prior week.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 27-JAN-17 06:00:00 to 27-JAN-17 09:00:00 (PST-8)
Magnitude: 65.00 MG
Reported by: Mesonet

The mesonet station at Sill Hill reported high winds with a peak gust of 75 mph between 0610 and 0620PST.

High Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 27-JAN-17 07:00:00 to 27-JAN-17 10:00:00 (PST-8)
Magnitude: 76.00 MG
Reported by: Mesonet

Periods of strong Santa Ana Winds blew through the passes and canyons of the Santa Ana Mountains between 2200PST on the 26th and 1200PST on the 28th. Strongest winds surfaced between 0700 and 1000PST on the 27th with a peak gust of 88 mph at Pleasants Peak and 87 mph in Fremont Canyon.

Strong Wind in ORANGE COUNTY INLAND, CALIFORNIA
From 27-JAN-17 07:00:00 to 28-JAN-17 10:00:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 5.00K
Reported by: Law Enforcement

Several periods of gusty Santa Ana winds downed a tree near Peter's Canyon Regional Park and power lines in eastern Villa Park.

Strong Wind in SAN DIEGO COUNTY COASTAL AREAS, CALIFORNIA
From 27-JAN-17 07:00:00 to 27-JAN-17 14:00:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 40.00K
Reported by: Law Enforcement

Locally gusty Santa Ana Winds briefly surfaced along the coast of San Diego County, including parts of the San Diego Metro. Peak gusts were in the 30-45 mph range. Winds combined with saturated soils to down at least 3 large trees in Downtown San Diego and Mission Valley. The trees crushed 2 cars.

Strong Wind in ORANGE COUNTY COASTAL, CALIFORNIA
From 27-JAN-17 07:00:00 to 27-JAN-17 11:00:00 (PST-8)
Magnitude: 39.00 EG
Property damage: 2.00K
Reported by: Law Enforcement

Santa Ana Winds with gusts of 40-45 mph surfaced briefly on the morning of the 27th in Santa Ana and Irvine. Winds downed a large tree that block 3 lanes along Interstate 405.

High Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 27-JAN-17 08:10:00 to 27-JAN-17 09:10:00 (PST-8)
Magnitude: 62.00 EG
Property damage: 40.00K
Reported by: Mesonet

Periods of gusty Santa Ana winds developed between 0000PST on the 27th and 1200PST on the 28th. Strongest winds were reported in Devore with a peak gust of 71 mph between 0810 and 0910PST on the 27th. The winds downed power lines and trees in San Bernardino and Ontario. Two big rigs overturned, one near Mira Loma and another at the Interstate 10 and 15 inter-change.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 27-JAN-17 17:30:00 to 28-JAN-17 12:10:00 (PST-8)
Magnitude: 86.00 MG
Reported by: Mesonet

The Sill Hill mesonet reported a second period of high winds between 1730PST on the 27th and 1210PST on the 28th, with numerous gusts in excess of 70 mph and a peak gust of 99 mph between 0140 and 0150PST on the 28th. Other stations in the mountains reported wind gusts in the 40-60 mph range during the same period. Several big rigs were overturned along Interstate 8 and multiple trees were blown down along Highway 79.

High Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 27-JAN-17 22:00:00 to 27-JAN-17 23:00:00 (PST-8)
Magnitude: 52.00 MG
Property damage: 3.00K
Reported by: Mesonet

The mesonet station in Potrero measured a 60 mph gust between 2240 and 2230PST, and the mesonet at Dye Mtn. measured a 58 mph gust between 2240 and 2250PST. Elsewhere, peak gusts were in the 35-55 mph range between 0700PST on the 27th and 1200PST on the 28th. A couple trees were downed near Fallbrook.