A cold, late-season upper-level low moved inland over southern California on the 14th and 15th, bringing another round of winter storm-like conditions and precipitation. The initial round of rainfall occurred the afternoon of the 14th, heaviest in Orange County and the Inland Empire. Additional intense cells developed (with thunder) between 0500-0700 PST from Oceanside to Temecula and Point Loma to El Cajon. Lindbergh Field received 1.3 inches in 1 hour and 0.71 in 9 minutes during this time, setting records. Impacts included a debris flow near Fallbrook along Highway 395, 6 high water rescues reported by Lifeguards from Midway to Mission Hills and North Park, and flooding/road closure again at Spring Valley Quarry Road dip and Escondido Creek on Country Club Drive. The Padres baseball game experienced a rare 2-hour delay as well, due to the rain. The Fashion Valley river gage on the San Diego River reached 7 feet with road closures and golf course flooding in the area. A flash flood watch was in effect for the 15th due to the widespread showers in recently burned areas and steep terrain. A flash flood warning was issued on the 14th for southwestern San Diego County due to a thunderstorm with heavy rain.
In addition to the rain, winds were very strong, gusting in the upper 50s and 60s mph below the E-W passes and along the desert mountain slopes.

Flash Flood in SAN DIEGO, CALIFORNIA
From 14-MAY-15 17:00:00 to 14-MAY-15 22:00:00 (PST-8)
Location: OCEAN BEACH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

There were reports of San Diego fire and police responding to multiple (6 incidents) swift water rescues in the Midway and Mission Hills neighborhoods.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 14-MAY-15 18:00:00 to 14-MAY-15 20:00:00 (PST-8)
Location: (SAN)SAN DIEGO INTL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

San Diego Lindbergh Field reported 1.30 inches of rain from 1900-2000 PST. The 6 hour period prior totaled 1.57 inches. The 9 minute period within that main hour, totaled 0.71 inches, which is near the 1/100 return interval.

Flash Flood in SAN DIEGO, CALIFORNIA
From 14-MAY-15 18:00:00 to 14-MAY-15 21:00:00 (PST-8)
Location: HILLCREST
Flood cause: Heavy Rain
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Law Enforcement

San Diego Fire and San Diego city lifeguard swift rescue reported at least 3 vehicles under water and responded to high water rescues. The Midway area at the Marine Corps Recruit Depot was closed with a vehicle under 4 feet of water. A vehicle floated and damaged other vehicles. Trash cans were also reported floating. Homes on Torrance and Reynard were flooded with some resident evacuations and garage and minor home damage reported.

Flash Flood in SAN DIEGO, CALIFORNIA
From 14-MAY-15 19:00:00 to 14-MAY-15 21:00:00 (PST-8)
Location: GRANTVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A resident reported flooding on El Cajon Boulevard in the North Park neighborhood of San Diego. Based on photos, the water appears to be around 6 to 8 inches deep.

Debris Flow in SAN DIEGO, CALIFORNIA
From 14-MAY-15 20:00:00 to 14-MAY-15 21:00:00 (PST-8)
Location: WINTERWARM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

CHP reported a mudslide and rock slide along Old Highway 395 at Dulin Road due to heavy rainfall.