Storm Events Database

Event Details

Event Tornado
-- Scale EF0
-- Length 0.5 Miles
-- Width 50 Yards
State CALIFORNIA
County/Area RIVERSIDE
WFO SGX
Report Source NWS Storm Survey
NCDC Data Source CSV
Begin Date 2012-08-12 14:30:00.0 PST-8
Begin Location 2ESE PERRIS
Begin Lat/Lon 33.77/-117.2
End Date 2012-08-12 15:45:00.0 PST-8
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 0.00K
Episode Narrative These days were a continuation of the deep monsoonal flow that persisted over the area through much of the month. Thunderstorms developed each afternoon over the mountains, deserts and northern inland valleys, and quickly diminished by sunset with areas of rural, urban and flash flooding. Flooding activity on the 11th was focused around Big Bear and Victorville in San Bernardino County, as well as Campo in San Diego County. Thunderstorm activity also developed along the Elsinore Convergence Zone in eastern Riverside County. Thunderstorms in this area became severe and produced a couple damaging microbursts along with the small hail and heavy rain. Similar storms in the Elsinore area on the 12th produced a landspout and another damaging microburst. Significant flooding was also observed in the Forest Falls area on that day. Mostly minor urban flooding was observed in the upper deserts and Forest Falls again on the 13th.
Event Narrative A land spout tornado was associated with and southwest of the parent (non-supercell) thunderstorm that was over Nuevo, on the east side of Perris. The land spout appeared to be over the fields just east of or near Interstate 215. Separate wind damage from the parent thunderstorm was observed to the northeast over Nuevo on Menifee Road. There was no apparent damage from the land spout itself. A spotter also sent in video of the land spout.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 230.00K 0.00K
BALDWIN LAKE SAN BERNARDINO CO. CA 08/11/2012 10:30 PST-8 Flash Flood 0 0 0.00K 0.00K
CAMPO SAN DIEGO CO. CA 08/11/2012 12:30 PST-8 Lightning 0 0 5.00K 0.00K
ADELANTO HANSEN ARPT SAN BERNARDINO CO. CA 08/11/2012 13:00 PST-8 Flood 0 0 0.00K 0.00K
LAKE ELSINORE RIVERSIDE CO. CA 08/11/2012 14:00 PST-8 Thunderstorm Wind 76 kts. MG 0 0 5.00K 0.00K
FOREST FALLS SAN BERNARDINO CO. CA 08/12/2012 13:00 PST-8 Flash Flood 0 0 0.00K 0.00K
SAN FELIPE SAN DIEGO CO. CA 08/12/2012 13:00 PST-8 Flash Flood 0 0 0.00K 0.00K
WARNER SPGS SAN DIEGO CO. CA 08/12/2012 13:00 PST-8 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
NUEVO RIVERSIDE CO. CA 08/12/2012 14:30 PST-8 Thunderstorm Wind 52 kts. EG 0 0 200.00K 0.00K
PERRIS RIVERSIDE CO. CA 08/12/2012 14:30 PST-8 Tornado EF0 0 0 0.00K 0.00K
PERRIS RIVERSIDE CO. CA 08/12/2012 15:15 PST-8 Funnel Cloud 0 0 0.00K 0.00K
PERRIS RIVERSIDE CO. CA 08/12/2012 15:15 PST-8 Thunderstorm Wind 48 kts. EG 0 0 20.00K 0.00K
Totals: 0 0 230.00K 0.00K