Scattered showers and thunderstorms impacted the desert to the coast on September 24. Locally heavy rainfall occurred across San Diego County with rainfall of 0.5 to 1 inch occurring, locally higher 1 to 2 inches near Palomar Mountain. A rare Severe Thunderstorm Warning was issued for downtown San Diego. Widespread hail and strong winds were reported.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:30:00 to 24-SEP-21 14:30:00 (PST-8)
Location: CALAVO GARDENS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

NBC and CBS reported a 70 foot pine tree fell on a home, damaged a garage and downed a power line. A smaller tree was reported down in the same area. Occurred at 4500 Panorama Drive.

Hail in SAN DIEGO, CALIFORNIA
From 24-SEP-21 12:24:00 to 24-SEP-21 12:24:00 (PST-8)
Location: WARNER SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured hail 1 inch in diameter.

Flood in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:11:00 to 24-SEP-21 14:11:00 (PST-8)
Location: JAMACHA JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported flooding at Willow Glen Drive at Jamacha Road.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 16:05:00 to 24-SEP-21 16:05:00 (PST-8)
Location: LA MESA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station CW7369 La Mesa 1 reported rainfall of 0.68 inch.

Flash Flood in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:32:00 to 24-SEP-21 14:32:00 (PST-8)
Location: SPRING VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Campo Road flooded between Avocado Rd and Via Mercado. Three vehicles were stuck in the water.

Flood in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:35:00 to 24-SEP-21 14:35:00 (PST-8)
Location: SPRING VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Swiftwater rescue on Campo Road from North Bonita to Kenwood. Several vehicles stuck in the roadway.

Flood in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:00:00 to 24-SEP-21 15:00:00 (PST-8)
Location: SPRING VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Two vehicles stuck in the water on Highway 94. Shut down traffic on the ramp to Highway 94 at Mercado.

Flood in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:45:00 to 24-SEP-21 15:45:00 (PST-8)
Location: LINCOLN ACRES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

All four lanes flooded I-15 South at Civic Center. Blocked storm drain.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:27:00 to 24-SEP-21 15:27:00 (PST-8)
Location: PALA
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Wind gust to 50 knots. The temperature dropped 10 degrees. SDG&E Rancho Heights.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 13:00:00 to 24-SEP-21 13:00:00 (PST-8)
Location: MESA GRANDE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Station MEGC1 reported rainfall of 1.46 inch 8.2 NW Santa Ysabel.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:25:00 to 24-SEP-21 14:25:00 (PST-8)
Location: PALA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Station OFLC1 reported rainfall of 1.17 inch of heavy rain 7.1 E of Rainbow.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:15:00 to 24-SEP-21 15:15:00 (PST-8)
Location: PALOMAR MTN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station PAMC1 Palomar Mountain RAWS reported rainfall of 0.97 inch.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:49:00 to 24-SEP-21 15:49:00 (PST-8)
Location: SPRING VLY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station RDHC1 Spring Valley reported rainfall of 0.87 inch.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:30:00 to 24-SEP-21 14:30:00 (PST-8)
Location: DESCANSO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station DSCC1 reported heavy rain of 0.81 inch 5.9 W Pine Valley.

Heavy Rain in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:51:00 to 24-SEP-21 15:51:00 (PST-8)
Location: (SAN)SAN DIEGO INTL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS station KSAN San Diego Airport reported rainfall of 0.48 inch from thunderstorms.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 24-SEP-21 15:26:00 to 24-SEP-21 15:26:00 (PST-8)
Location: PALOMAR MTN
Magnitude: 47.00 MG
Property damage: 1.00K
Reported by: Mesonet

Mesonet station AT571 Palomar Mountain Lookout recorded a wind gust to 54 mph from nearby thunderstorms.

Hail in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:37:00 to 24-SEP-21 14:37:00 (PST-8)
Location: PALOMAR MTN
Magnitude: 0.50 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Accumulating hail about 4 inches deep at 33120 Canfield Road. Hail 0.5 inch in diameter.

Hail in SAN DIEGO, CALIFORNIA
From 24-SEP-21 16:50:00 to 24-SEP-21 16:50:00 (PST-8)
Location: SAN DIEGO
Magnitude: 0.25 
Property damage: 0.05K
Crop damage: 0.00K
Reported by: Public

Two mping reports of pea size hail.

Lightning in RIVERSIDE, CALIFORNIA
From 24-SEP-21 15:00:00 to 24-SEP-21 15:00:00 (PST-8)
Location: PALM SPGS
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Broadcast Media

Brush fire in Palm Springs after lightning struck a palm tree.

Thunderstorm Wind in SAN DIEGO, CALIFORNIA
From 24-SEP-21 14:20:00 to 24-SEP-21 14:20:00 (PST-8)
Location: ALPINE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The Department of Highways reported a large tree down on the roadway and a large tree struck a vehicle at Oak View Place and Scenic View Road. A chainsaw was required for cleanup.