California, 2001

Flood in California, April 10, 2001

April 10, 2001 · NWS SGX · 1 event in 1 county or zone

A series of showers and thunderstorms moving over the same area caused flooding along Interstate 5. Four inches of water was across all lanes, with eighteen inches of water standing along the roadside.

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.

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

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.

A series of showers and thunderstorms moving over the same area caused flooding along Interstate 5. Four inches of water was across all lanes, with eighteen inches of water standing along the roadside.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Diego, CA wrote its last area forecast discussion before the first event at Apr 10, 1:00 AM PST, 2 hours 9 minutes earlier.

Area forecast discussion, Apr 10, 1:00 AM PST, 2 hours 9 minutes before
EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
200 AM PDT TUE APR 10 2001

                      ...SYNOPSIS...
ONE LAST BATCH OF SHOWERS AND ISOLATED THUNDERSTORMS WILL MOVE ACROSS
SOUTHERN SAN DIEGO COUNTY THIS MORNING...THEN SKIES WILL START TO
CLEAR AROUND 8 AM. PARTLY CLOUDY AND A LITTLE WARMER MOST AREAS THIS
AFTERNOON AND WEDNESDAY IN DRY NORTHWEST FLOW ALOFT. ANOTHER STORM
MOVING PAST TO THE NORTHEAST WILL BRING SOME CLOUDS AND COOLING WITH
GUSTY WINDS IN THE MOUNTAINS AND DESERTS ON WEDNESDAY. NIGHT AND
MORNING COASTAL LOW CLOUDS...OTHERWISE FAIR AND WARMER THIS WEEKEND.

                     ...DISCUSSION...

SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE THIS EARLY MORNING
OVER SAN DIEGO COUNTY DUE TO RESIDUAL MOISTURE...COLD CYCLONIC FLOW
ALOFT...WRAP AROUND MOISTURE AND ISLAND EFFECTS. SHOWERS HAVE ENDED
OVER THE REST OF THE AREA. SNOW LEVEL DOWN TO ABOUT 3000 FT.

STRONG DVV AND DRIER NW FLOW ALOFT DEVELOPS THIS AFTERNOON FOR PARTLY
CLOUDY SKIES. A LITTLE WARMER TODAY WITH MORE SUNSHINE AND INCREASING
HEIGHTS...THEN NOT MUCH TEMP CHANGE WED.

NEXT UPPER LOW DROPS S INTO NV IN AN INSIDE SLIDER TYPE PATTERN WED.
THIS WILL CONTINUE SOME CLOUDS WED WITH GUSTY WINDS IN MTS/DESERTS.

LONGER RANGE PROGS CONTINUE TO INDICATE DRY WSW FLOW ALOFT WITH SOME
HIGH CLOUDS AND NIGHT/MORNING COASTAL LOW CLOUDS. WARMING TO SEASONAL
BY WEEKEND.

SAN 200

.SAN...NONE.

MACKECHNIE

The radar

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

Open the radar archive at this moment

Event by event

1 flood. Local standard time, as filed.

Flood, San Diego

When
April 10, 3:09 AM PST to 4:01 AM PST
Where
San Diego County, 2 mi E of La Jolla
Reported by
LAW ENFORCEMENT
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.

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

The same day elsewhere

More

Every storm in California in 2001Every state in 2001This day in weather historyWarnings in California, April 2001

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: 5237553.