Thunderstorm Wind, Los Angeles
- When
- April 18, 3:33 AM PST
- Where
- Los Angeles County, Paramount
- Measured
- 87 kt (100 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.883, -118.183
Hail and Damaging Winds in California, April 18, 2000
A severe thunderstorm struck southern sections of Los Angeles County. The thunderstorm produced large hail and powerful microburst winds, estimated between 80 and 100 MPH.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 8
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS LOX wrote it up.
A severe thunderstorm struck southern sections of Los Angeles County. The thunderstorm produced large hail and powerful microburst winds, estimated between 80 and 100 MPH. The first report of damage occurred in Paramount where over 30 mobile homes sustained structural damage with even one mobile home blown over. From Paramount, the severe storm moved across the communities of Bellflower, Downey, Norwalk, Whittier, La Mirada, Rowland Heights and Diamond Bar. Along the storm path, widespread structural damage was reported to homes and businesses, including the destruction of chimneys and concrete walls. In addition, numerous trees and power poles were blown down. In Norwalk, a 100 foot eucalyptus tree was blown down across Interstate 5, closing all southbound lanes for over three hours. In Downey, three-quarter inch hail was reported along with the powerful microburst winds.
The radar
The Santa Ana Mts radar (KSOX), 51 km away, was scanning. The volume nearest the first event began at 11:33 UTC.
Event by event
7 thunderstorm wind, 1 hail. Local standard time, as filed.
Thunderstorm Wind, Los Angeles
- When
- April 18, 3:35 AM PST
- Where
- Los Angeles County, Bellflower
- Measured
- 70 kt (81 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.867, -118.083
Thunderstorm Wind, Los Angeles
- When
- April 18, 3:35 AM PST
- Where
- Los Angeles County, Downey
- Measured
- 70 kt (81 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.917, -118.133
Thunderstorm Wind, Los Angeles
- When
- April 18, 3:38 AM PST
- Where
- Los Angeles County, Norwalk
- Measured
- 70 kt (81 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.883, -118.083
Thunderstorm Wind, Los Angeles
- When
- April 18, 3:38 AM PST
- Where
- Los Angeles County, La Mirada
- Measured
- 70 kt (81 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.867, -118.033
Hail, Los Angeles
- When
- April 18, 3:40 AM PST
- Where
- Los Angeles County, Downey
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 33.917, -118.133
Thunderstorm Wind, Los Angeles
- When
- April 18, 4:00 AM PST
- Where
- Los Angeles County, Rowland Hgts
- Measured
- 87 kt (100 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.983, -117.883
Thunderstorm Wind, Los Angeles
- When
- April 18, 4:10 AM PST
- Where
- Los Angeles County, Diamond Bar
- Measured
- 70 kt (81 mph)
- Reported by
- NWS STORM SURVEY
- Coordinates
- 33.983, -117.833
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- High Wind in Colorado, April 18, 2000
- Blizzard in South Dakota, April 18 to 19, 2000
- High Wind in New Mexico, April 18, 2000
- Damaging Wind in Nebraska, April 18, 2000
- High Wind in Colorado, April 18, 2000
- High Wind in Utah, April 18, 2000
- Damaging Wind in Nebraska, April 18, 2000
- Wildfire and High Wind in Colorado, April 18 to 19, 2000
- Hail and Damaging Winds in Nebraska, April 18 to 19, 2000
- Flooding in New Jersey, April 18, 2000
- High Wind in Nebraska, April 18 to 19, 2000
- Heavy Snow in Nevada, April 18, 2000
More
Every storm in California in 2000Every state in 2000This day in weather historyWarnings in California, April 2000
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5140011, 5140012, 5140013, 5140014, 5140015, 5140018, 5140016, 5140017.