A cold low pressure system from the Gulf of Alaska moved through California, bringing light to moderate precipitation. A few locations in the San Diego County and San Bernardino County Mountains received between 1 and 2 inches of rain. One of these locations experienced a debris flow along State Route 18, in the upper Waterman Canyon just south of Crestline, where boulders the size of beer kegs washed across both lanes of the highway. Strong and gusty west to northwest winds accompanied this system, with several mountain and desert slope stations reporting sustained winds over 45 mph and gusts to 80 mph.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 08-NOV-12 01:00:00 to 08-NOV-12 07:00:00 (PST-8)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds began at the Mt. Laguna North mesonet station between 0100 and 0200 PST on the 8th and ended between 0600 and 0700 PST the same day. During this time, winds were sustained 40-60 mph with several gusts over 65 mph. The peak gust of 70 mph was recorded between 0400 and 0500 PST.
The Volcan Mountain SDGE mesonet station reported sustained winds above 40 mph between 0430 and 0600 PST. A peak gust of 60 mph was recorded between 0500 and 0510 PST.

High Wind in COACHELLA VALLEY, CALIFORNIA
From 08-NOV-12 04:00:00 to 08-NOV-12 08:00:00 (PST-8)
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

High winds began at the Whitewater RAWS between 1150 and 1250 PST on the 8th and ended between 0650 and 0750 PST the same day. During this time, winds were sustained 35-48 mph with gusts over 59-80 mph. The peak gust of 80 mph was recorded between 0450 and 0550 PST.
The Sky Valley mesonet station reported sustained winds of 44 mph with gusts to 66 mph between 0443 and 0553 PST.

High Wind in COACHELLA VALLEY, CALIFORNIA
From 09-NOV-12 05:00:00 to 09-NOV-12 09:00:00 (PST-8)
Magnitude: 69.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds began at the Sky Valley mesonet station between 0543 and 0643 PST on the 9th and ended between 0943 and 1043 PST the same day. During this time, winds were sustained 32-56 mph with gusts 56-79 mph. The peak gust of 79 mph was recorded between 0743 and 0843 PST. Another gust to 61 mph was measured later in the afternoon between 1443 and 1543 PST.
High winds began at the Whitewater RAWS between 0450 and 0550 PST on the 9th and ended between 1050 and 1150 PST the same day. During this time, winds were sustained 31-41 mph with gusts over 58-61 mph. The peak gust of 61 mph was recorded between 0650 and 0750 PST.

High Wind in SAN DIEGO COUNTY MOUNTAINS, CALIFORNIA
From 09-NOV-12 01:30:00 to 09-NOV-12 15:00:00 (PST-8)
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

High winds began at the Mt. Laguna North mesonet station between 0200 and 0300 PST on the 9th and ended between 1200 and 1300 PST the same day. During this time, winds were sustained 55-68 mph with gusts over 67-76 mph. The peak gust of 76 mph was recorded between 0700 and 0800 PST.
High winds began at the Volcan Mountain mesonet station between 0130 and 0140 PST on the 9th and ended between 1420 and 1430 PST the same day. During this time, winds were sustained over 40 mph with frequent gusts 57-70 mph. The peak gust of 70 mph was recorded between 0720 and 0730 PST.
High winds began at the Harrison Park mesonet station between 0320 and 0330 PST on the 9th and ended between 0500 and 1730 PST the same day. During this time, winds were sustained 41-46 mph. The peak gust of 60 mph was recorded twice between 0440 and 0500 PST.

Debris Flow in SAN BERNARDINO, CALIFORNIA
From 09-NOV-12 02:00:00 to 09-NOV-12 03:30:00 (PST-8)
Location: CRESTLINE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported boulders the size of beer kegs across both lanes of state route 18 near Upper Waterman Canyon.