California, 2005

Tornado and Flash Flood in California, July 23, 2005

July 23, 2005 · NWS SGX · 10 events in 1 county or zone

A severe thunderstorm rapidly developed just before 2:00 PM northeast of Hemet along the Elsinore Convergence Zone. This storm produced a tornado, damaging straight line winds to 70 mph, dime to nickel size hail, and flash flooding.

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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$68,000
Crop damage
None recorded
Events
10

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 severe thunderstorm rapidly developed just before 2:00 PM northeast of Hemet along the Elsinore Convergence Zone. This storm produced a tornado, damaging straight line winds to 70 mph, dime to nickel size hail, and flash flooding. The storm traveled southwestward along the Elsinore Convergence Zone before dissipating near interstate 15 in Murrieta. The majority of the reported damage consisted of downed trees and flooded roads and property.

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 Jul 23, 8:10 AM PST, 4 hours 45 minutes earlier.

Area forecast discussion, Jul 23, 8:10 AM PST, 4 hours 45 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
910 AM PDT SAT JUL 23 2005

.SYNOPSIS...VERY MOIST AND UNSTABLE FLOW FROM THE SOUTHEAST WILL
BRING SHOWERS AND THUNDERSTORMS AT TIMES TO THE MOUNTAINS AND
DESERTS...MOST ABUNDANT DURING THE AFTERNOONS. SOME OF THE SHOWERS
AND THUNDERSTORMS WILL DRIFT WEST OF THE MOUNTAINS. A FLOOD WATCH
FOR FLASH FLOODING IS IN EFFECT UNTIL 8 PM TODAY FOR THE VALLEYS...
MOUNTAINS AND DESERTS. THE MOIST FLOW WILL BEGIN TO DECREASE ON
TUESDAY...SO THE THUNDERSTORMS WILL BE LESS FREQUENT. WEAK TROUGHING
OVER THE EAST PACIFIC SHOULD BRING AN END TO THE THUNDERSTORMS AND
SLIGHT COOLING LATE IN THE WEEK.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

THUNDERSTORMS THAT CAME THROUGH THE AREA EARLY THIS MORNING HAVE
ENDED FOR THE TIME BEING. SOME THUNDERSTORMS ARE SHOWING UP ON THE
WEST SHORE OF THE GULF OF CALIFORNIA SOUTHWEST OF YUMA DRIFTING TO
THE WEST NORTHWEST.

SATELLITE LOOP INDICATES THE EASTERLY WAVE ASSOCIATED WITH THE
REMAINS OF EMILY WAS OVER BAJA WORKING ITS WAY WESTWARD. EXPECT THE
AXIS OF THIS EASTERLY WAVE TO PASS THROUGH TO THE COASTAL AREAS THIS
EVENING. THE CLOUDS OVER THE EASTERN DESERTS ARE BEGINNING TO BREAK
UP WHICH SHOULD ALLOW FOR MORE SOLAR HEATING AND ALLOW CONVECTION TO
BEGIN OVER THE AREA LATER THIS AFTERNOON AND EVENING.

MADE SOME ADJUSTMENTS TO THE DEW POINT GRIDS FOR THE DESERTS FOR
TODAY...BRINGING THEM UP MORE IN LINE WITH WHAT THE METARS AND RAWS
REPORTS ARE INDICATING.

WILL EXTEND THE FLASH FLOOD WATCH TO INCLUDE THE INLAND EMPIRE AREA.
FLASH FLOOD WATCH WILL BE IN EFFECT UNTIL 8 PM THIS EVENING.

MOIST...UNSTABLE AIR MASS REMAINS OVER THE AREA THROUGH SUNDAY AND
MONDAY TO CONTINUE THE SHOWERS AND THUNDERSTORMS...WITH THE GREATEST
ACTIVITY OVER THE MOUNTAINS AND DESERTS DURING THE AFTERNOON AND
EVENING HOURS. THE EASTERLY FLOW ALOFT WILL ALLOW SOME OF THESE TO
MOVE TOWARDS THE VALLEYS AND COASTAL AREAS FROM TIME TO TIME. THE
MOISTURE SHOULD BEGIN TO DECREASE ON TUESDAY WITH A DECREASE IN THE
THUNDERSTORM ACTIVITY...MAINLY CONFINED TO THE MOUNTAINS AND DESERTS.

UPPER TROUGH DEVELOPS ALONG THE PACIFIC NORTHWEST COAST LATE IN THE
WEEK WHICH SHOULD BRING A SOUTHWEST FLOW ALOFT OVER THE AREA
SHUTTING OFF THE MOISTURE AND ENDING THE THUNDERSTORM ACTIVITY. THIS
WILL ALSO BRING SOME COOLING TO THE AREA LATE IN THE WEEK.

WILL UPDATE THE FORECAST TO INCLUDE FLASH FLOOD WATCH FOR THE INLAND
EMPIRE. NO OTHER UPDATES ARE PLANNED AT THIS TIME.

&&

.AVIATION...
AREAS OF IFR CIGS WITH BASES NEAR 800 MSL AND TOPS 1500 DEVELOPED
NEAR THE COAST THIS MORNING. THE STRATUS LAYER IS SUPPORTED BY A
COASTAL EDDY. MOST COASTAL AREAS SHOULD BECOME VFR-MVFR BY 18Z. A
BROAD AREA OF BKN-OVC MID LEVEL CLOUDS WITH BASES ABOVE 8000 MSL
WILL BE DRIFTING OVER THE REGION TODAY ASSOCIATED WITH MONSOONAL E
FLOW ALOFT. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
REDEVELOP AGAIN THIS AFTERNOON AS THE CLOUDS THIN AND HEATING
DESTABILIZES THE ATMOSPHERE. ISOLATED HEAVY STORMS ARE POSSIBLE WITH
TOPS TO 40000 MSL...SPREADING TO THE COAST LATE IN THE DAY. THE EDDY
IS EXPECTED TO PERSIST INTO SUNDAY MORNING WITH IFR CIGS
REDEVELOPING OVER COASTAL AIRPORTS AGAIN AFTER 08Z.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH...SEE LAXFFASGX.
HAZARDOUS WEATHER OUTLOOK FOR MONSOONAL THUNDERSTORMS...SEE
LAXHWOSGX.
HIGH RIP CURRENT POTENTIAL...SEE LAXSRFSGX.

&&

PUBLIC...HORTON
AVIATION...DANDREA
Hazardous weather outlook, Jul 23, 10:50 AM PST, 2 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE SAN DIEGO CA
1150 AM PDT SAT JUL 23 2005

THE REMNANTS OF HURRICANE EMILY WILL BRING THUNDERSTORMS AT TIMES
TODAY THROUGH MONDAY. THUNDERSTORMS WILL BE MOST FREQUENT OVER THE
MOUNTAINS AND DESERTS. THUNDERSTORMS WILL GRADUALLY DECREASE TUESDAY
AND WEDNESDAY AS SLIGHTLY DRIER AIR ALOFT MOVES INTO THE AREA.

CAZ042-043-048-050-055>058-060>062-232300-
ORANGE COUNTY COASTAL AREAS-
SAN DIEGO COUNTY COASTAL AREAS-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
SAN DIEGO COUNTY VALLEYS-
SAN BERNARDINO COUNTY MOUNTAINS-
RIVERSIDE COUNTY MOUNTAINS-
SAN DIEGO COUNTY MOUNTAINS-
APPLE AND LUCERNE VALLEYS-
COACHELLA VALLEY-
SAN DIEGO COUNTY DESERTS-
1150 AM PDT SAT JUL 23 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR
ALL OF EXTREME SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY AND TONIGHT.

HIGH FLASH FLOOD POTENTIAL RATING IS IN EFFECT IN THE RIVERSIDE AND
SAN DIEGO COUNTY MOUNTAINS. MODERATE FLOOD POTENTIAL RATING IS IN
EFFECT IN THE REMAINING MOUNTAINS AND DESERTS PLUS THE SAN DIEGO
COUNTY COASTS AND VALLEYS. THUNDERSTORMS WITH FLASH FLOODING ARE
POSSIBLE. DANGEROUS LIGHTNING...SMALL HAIL AND STRONG GUSTY WINDS
WILL ALSO BE THREATS FROM THE THUNDERSTORMS THROUGHOUT THE AREA.

FLASH FLOOD WATCH UNTIL 8 PM TODAY FOR THE VALLEYS...MOUNTAINS AND
DESERTS.

.DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY.

FOR SUNDAY...HIGH FLASH FLOOD POTENTIAL RATING IS IN EFFECT IN THE
RIVERSIDE AND SAN DIEGO COUNTY MOUNTAINS. MODERATE FLOOD POTENTIAL
RATING IS IN EFFECT IN THE REMAINING MOUNTAINS AND DESERTS.
THUNDERSTORMS WITH FLASH FLOODING ARE POSSIBLE. DANGEROUS
LIGHTNING...SMALL HAIL AND STRONG GUSTY WINDS WILL ALSO BE THREATS
FROM THE THUNDERSTORMS. THUNDERSTORMS WILL BE MOST FREQUENT OVER THE
MOUNTAINS AND DESERTS BUT COULD ALSO OCCUR WEST OF THE MOUNTAINS.

MONDAY THROUGH WEDNESDAY...THUNDERSTORMS WILL CONTINUE IN MOST AREAS
MONDAY...THEN GRADUALLY DECREASE TUESDAY AND WEDNESDAY AND MOSTLY BE
RESTRICTED TO THE MOUNTAINS AND DESERTS. DANGEROUS LIGHTNING...SMALL
HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND LOCAL FLASH
FLOODING WILL BE THREATS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED TODAY AND AGAIN SUNDAY.

NOTE...THE HAZARDOUS WEATHER OUTLOOK NOW INCORPORATES THE FLASH
FLOOD POTENTIAL INDEX THAT WAS ISSUED SEPARATELY IN PREVIOUS YEARS.
THE FLASH FLOOD POTENTIAL INDEX WILL BE INCLUDED IN THE HAZARDOUS
WEATHER OUTLOOK IF IT EXCEEDS THE LOW CATEGORY IN THE FIRST TWO
DAYS. THIS PRODUCT WILL BE UPDATED DAILY AT 4 AM AND 4 PM OR AS
NEEDED THROUGH SEPTEMBER 30.

MAXWELL/HORTON

The radar

The San Diego radar (KNKX), 134 km away, was scanning. The volume nearest the first event began at 21:07 UTC.

Open the radar archive at this moment

Event by event

3 hail, 3 thunderstorm wind, 2 heavy rain, 1 tornado, 1 flash flood. Local standard time, as filed.

Heavy Rain, Riverside

When
July 23, 12:55 PM PST to 1:25 PM PST
Where
Riverside County, San Jacinto
Measured
1.5
Reported by
TRAINED SPOTTER
Coordinates
33.744, -115.994 (the zone’s center; the record gives no point)

A trained spotter measured 1.50 inches of rain from a thunderstorm in 30 minutes.

Tornado, Riverside

When
July 23, 1:06 PM PST to 1:21 PM PST
Where
Riverside County, 1 mi E of Hemet
Rating
F0
Path length
2 mi
Path width
50 yd
Property damage
$2,000
Reported by
STORM CHASER
Coordinates
33.733, -116.950

A tornado was spotted at around 2:06 PM near the intersection of highways 74 and 79. The weak tornado traveled westward towards Hemet-Ryan airport and resulted in mainly broken trees limbs.

Heavy Rain, Riverside

When
July 23, 1:10 PM PST to 1:25 PM PST
Where
Riverside County, Hemet
Measured
1
Reported by
TRAINED SPOTTER
Coordinates
33.744, -115.994 (the zone’s center; the record gives no point)

Two separate reports were received from Hemet indicating 1.00 inch of rainfall in 15 minutes.

Hail, Riverside

When
July 23, 1:21 PM PST
Where
Riverside County, Hemet
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
33.733, -116.967

A trained spotter reported hail slightly larger than dime size in Hemet.

Flash Flood, Riverside

When
July 23, 1:21 PM PST to 2:30 PM PST
Where
Riverside County, 2 mi SE of Hemet
Property damage
$50,000
Reported by
TRAINED SPOTTER
Coordinates
33.717, -116.950

The Domenigoni Parkway was flooded in numerous locations from Winchester Rd to State St. Several vehicles were stalled in flood waters. A homeless shelter at State St. and Menlo Ave. was flooded with 4 to 6 inches of water. Water went rushing through the resident manager's apartment and left all the units uninhabitable. Other buildings in the older part of Hemet were also flooded during the thunderstorm.

Hail, Riverside

When
July 23, 1:25 PM PST
Where
Riverside County, San Jacinto
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
33.783, -116.950

Hail ranging in size from 1/4 to 3/4 inch in diameter was reported in San Jacinto.

Thunderstorm Wind, Riverside

When
July 23, 1:32 PM PST
Where
Riverside County, Hemet
Measured
54 kt (62 mph) measured gust
Reported by
GENERAL PUBLIC
Coordinates
33.733, -116.967

Wind gust measured during heavy rain. Damage consisted of broken tree branches and downed leaves.

Thunderstorm Wind, Riverside

When
July 23, 1:55 PM PST to 2:12 PM PST
Where
Riverside County, 4 mi NE of Menifee
Measured
50 kt (58 mph) estimated gust
Property damage
$1,000
Reported by
GENERAL PUBLIC
Coordinates
33.767, -117.100

Various lawn furniture items such as chairs and tables were picked up and thrown through the air.

Thunderstorm Wind, Riverside

When
July 23, 2:00 PM PST to 2:05 PM PST
Where
Riverside County, Hemet
Measured
61 kt (70 mph) estimated gust
Property damage
$15,000
Reported by
FIRE DEPT/RESCUE SQUAD
Coordinates
33.733, -116.967

The fire department estimated a thunderstorm wind gust between 60 and 70 mph and trees down in Hemet.

Hail, Riverside

When
July 23, 2:05 PM PST
Where
Riverside County, 4 mi SW of Hemet
Measured
0.88 in hail
Reported by
TRAINED SPOTTER
Coordinates
33.700, -117.017

Nickel hail was reported near Hemet.

What these are

Heavy Rain
Rainfall totals unusual for the place and season that did not produce a flood.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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 2005Every state in 2005This day in weather historyThe tornado archive for California, 2005Warnings in California, July 2005

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: 5460707, 5460702, 5460708, 5460704, 5460709, 5460705, 5460774, 5460703, 5460706, 5460710.