California, 1997

Flood and Heavy Rain in California, July 22, 1997

July 22, 1997 · NWS SGX · 2 events in 2 counties and zones

Two rounds of very heavy thunderstorm rains, one in the morning, the other late in the day, resulted in flooding problems from the Morongo Valley, to the deserts of San Diego County. The hardest hit community was Desert Hot Springs, where nearly two inches of rain was reported during the morning hours.

Where it happened

Every event with a place to put it; 2 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
2

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 SGX wrote it up.

Two rounds of very heavy thunderstorm rains, one in the morning, the other late in the day, resulted in flooding problems from the Morongo Valley, to the deserts of San Diego County. The hardest hit community was Desert Hot Springs, where nearly two inches of rain was reported during the morning hours. Many roads were closed due to the high water and mud flows. Several residents reported water in their homes along with washed out driveways. Also, an apartment complex was flooded with up to one foot of water. Elsewhere, morning rains flooded roads in Palm Springs, and mud flows closed Highway 62 in the Morongo Valley, and Box Canyon Road between Mecca and Interstate 10 in the Coachella Valley. By late afternoon, intense thunderstorms developed over the deserts of San Diego County, flooding a 10 mile stretch of Yaqui Pass Road between Borrego Springs and Highway 78. Road crews were not able to reopen the road for traffic for three days due to mud and debris flows and pavement washouts. In addition to the flooding, lightning caused sporadic power and cable outages which affected thousands.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 flood, 1 heavy rain. Local standard time, as filed.

Flood, Riverside

When
July 22, 8:00 AM PST to 10:00 AM PST
Where
Riverside County, Desert Hot Spgs
Coordinates
33.744, -115.994 (the zone’s center; the record gives no point)

Heavy Rain, San Diego

When
July 22, 3:00 PM PST to 6:00 PM PST
Where
San Diego County, Borrego Spgs
Coordinates
33.028, -116.770 (the zone’s center; the record gives no point)

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.

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

The same day elsewhere

More

Every storm in California in 1997Every state in 1997This day in weather historyWarnings in California, July 1997

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: 5606516, 5606517.