An upper high set up over the Great Basin, ushering in gusty Santa Ana winds to Southern California. The highest wind gust was 91 mph at Hellhole Canyon, a wind prone location in the San Diego Mountains. Many other locations had wind gusts in excess of 70 mph. A few tractor trailers were blown over on I-8 in San Diego County. Valley locations also had some gusty winds, with gusts of 25-45 mph, with locally higher gusts.

High Wind in RIVERSIDE COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 09:00:00 to 17-DEC-19 10:00:00 (PST-8)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Poppet Flats RAWS reported a peak wind gust of 55 knots at 0914 AM PST on 12/17.

High Wind in SAN DIEGO COUNTY VALLEYS, CALIFORNIA
From 17-DEC-19 09:00:00 to 17-DEC-19 10:00:00 (PST-8)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Potrero mesonet reported a peak wind gust of 54 knots at 0920 AM PST on 12/17.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 08:00:00 to 17-DEC-19 09:00:00 (PST-8)
Magnitude: 79.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hellhole Canyon mesonet reported a peak wind gust of 79 knots at 0850 AM PST on 12/17.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 08:00:00 to 17-DEC-19 09:00:00 (PST-8)
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sill Hill reported a peak wind gust of 67 knots at 0810 AM PST on 12/17.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 07:00:00 to 17-DEC-19 08:00:00 (PST-8)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

East Willows Rd. mesonet reported a peak wind gust of 58 knots at 0730 AM PST on 12/17. At least 1 tractor trailer was blown over on its side by the wind on Interstate 8, causing major traffic disruptions.

High Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 17-DEC-19 07:00:00 to 17-DEC-19 08:00:00 (PST-8)
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Highland Springs reported a peak wind gust of 63 knots at 0716 AM PST on 12/17.

High Wind in SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS - THE INLAND EMPIRE, CALIFORNIA
From 17-DEC-19 07:00:00 to 17-DEC-19 08:00:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Devil Canyon reported a peak wind gust of 61 knots at 0720 AM PST on 12/17.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 06:00:00 to 17-DEC-19 07:00:00 (PST-8)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Pauma Valley reported a peak wind gust of 59 knots at 0612 AM PST on 12/17.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 08:00:00 to 17-DEC-19 09:00:00 (PST-8)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Alpine RAWS reported a peak wind gust of 62 knots at 0852 AM PST on 12/17.

High Wind in SAN BERNARDINO COUNTY MOUNTAINS, CALIFORNIA
From 17-DEC-19 05:00:00 to 17-DEC-19 06:00:00 (PST-8)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lytle Creek Rd. mesonet reported a peak wind gust of 60 knots at 0550 AM PST on 12/17.

High Wind in SANTA ANA MOUNTAINS AND FOOTHILLS, CALIFORNIA
From 17-DEC-19 03:00:00 to 17-DEC-19 04:00:00 (PST-8)
Magnitude: 76.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Fremont Canyon reported a peak wind gust of 76 knots at 0351 AM PST on 12/17.