California, 1998

Flash Flood and Damaging Winds in California, September 4 to 9, 1998

September 4 to 9, 1998 · NWS PSR · 3 events in 2 counties and zones

2 thunderstorm wind, 1 flash flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
3

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.

The radar

The San Diego radar (KNKX), 134 km away, was scanning. The volume nearest the first event began at 01:49 UTC.

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Event by event

2 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Flash Flood, Riverside

When
September 4, 4:30 PM PST to 5:30 PM PST
Where
Riverside County, 30 mi NW of Desert Center
Reported by
PARK/FOREST SERVICE
Coordinates
33.744, -115.994 (the zone’s center; the record gives no point)

Very heavy rain resulted in numerous washes running across roads in Joshua Tree Nattional Park.

Thunderstorm Wind, Imperial

When
September 4, 5:50 PM PST to 6:15 PM PST
Where
Imperial County, Salton City
Measured
60 kt (69 mph)
Reported by
GENERAL PUBLIC
Coordinates
33.300, -115.970

Large tree uprooted, power poles downed and awnings blown off of structures in the Salton Sea Beach area.

Thunderstorm Wind, Imperial

When
September 9, 2:35 PM PST to 4:00 PM PST
Where
Imperial County, Imperial
Measured
60 kt (69 mph)
Reported by
TRAINED SPOTTER
Coordinates
32.850, -115.570

Power lines and power poles downed across parts of Imperial and Niland. Numerous roofs were damaged. At least one billboard was toppled along Highway 86 south of town, and The Movies marquee was shattered. California Highway Patrol investigated a storm-related seven car pileup which occurred between 345 and 348 pm on Highway 111 just south of Aten Road. Some streets were flooded with about an inch /.98/ reported at Imperial. Dense blowing dust reduced visibility to less than 1/8 mile before the heavy rain began.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
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.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 1998Every state in 1998This day in weather historyWarnings in California, September 1998

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: 5671852, 5671851, 5671853.