California, 2001Flash Flood in California, August 11, 2001
August 11, 2001 · NWS PSR · 1 event in 1 county or zone
1 flash flood, as filed by the National Weather Service.
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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- Tropical storms and surge
- Floods
- Wind
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- Winter weather
- Heat and drought
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- Fire, smoke and dust
- Marine and coastal
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- 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 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 Phoenix, AZ wrote its last area forecast discussion before the first event at Aug 11, 1:45 PM PST, 6 hours earlier.
Area forecast discussion, Aug 11, 1:45 PM PST, 6 hours before
AZZ020>028-CAZ030>033-120545-
SOUTHWEST ARIZONA/SOUTHEAST CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PHOENIX AZ
245 PM MST SAT AUG 11 2001
.SYNOPSIS...
A VERY MOIST AIRMASS WILL CONTINUE ACROSS SOUTH-CENTRAL ARIZONA THIS
WEEKEND AND INTO EARLY NEXT WEEK...WITH LESSER AMOUNTS OF MOISTURE
EXPECTED OVER FAR SOUTHWEST ARIZONA AND SOUTHEAST CALIFORNIA. THIS
MEANS THAT THERE WILL BE A CHANCE OF THUNDERSTORMS OVER SOUTH-CENTRAL
ARIZONA...MAINLY DURING THE AFTERNOON AND EARLY NIGHTTIME HOURS.
HIGH PRESSURE WILL BECOME ESTABLISHED NEAR THE FOUR CORNERS EARLY
NEXT WEEK. THIS WILL GIVE A MORE EASTERLY FLOW ALOFT WHICH WILL
SERVE TO PUSH DEEPER MOISTURE FURTHER WEST...FOR BETTER CHANCES OF
STORMS ALONG AND WEST OF THE COLORADO RIVER AFTER SUNDAY.
.DISCUSSION...
MODELS REMAIN IN AGREEMENT. UPPER HIGH OVER SOUTHERN CA HAS BEEN
MOVING NORTH TOWARD SOUTHERN NV TODAY AND WILL CONTINUE INTO 4
CORNERS REGION ON SUNDAY. UPPER FLOW TO SHIFT FROM NORTH TO
NORTHEASTERLY TONIGHT AS UPPER HIGH MOVES INTO SOUTHERN NV. AIRMASS
OVER SOUTH CENTRAL AZ REMAINS MOIST WITH MORNING PHX RAOB SHOWING A
LITTLE UNDER 2 INCHES OF P WATER...ONLY SLIGHT LESS THAN FRI. THUS
THERE WILL BE A CHANCE OF THUNDERSTORMS TONIGHT IN SOUTH CENTRAL AZ
AS ACTIVITY NOW OVER AND IN VICINITY OF THE RIM REGION MAY MOVE DOWN
INTO SOUTH CENTRAL AZ THIS EVENING AND TONIGHT AS THE FLOW BECOMES
NORTHEASTERLY. IN ADDITION...THERE IS A VORTMAX IN VICINITY OF WHITE
MOUNTAINS TONIGHT TO ENHANCE THUNDERSTORMS TOWARD SOUTH CENTRAL AZ.
PLUS A WAVE IN NORTHERN MEXICO INTO SE AZ. WITH THE DEEP MOISTURE
OVER SOUTHERN GILA COUNTY SOME STORMS MAY PRODUCE LOCALLY HEAVY
RAINFALL. DRIER WESTERLY FLOW OVER SE CA TO KEEP THAT AREA MOSTLY
CLEAR TONIGHT AND SUNDAY. FLOW TO BECOME MORE EAST TO SOUTHEASTERLY
SUNDAY AS UPPER HIGH REACHES 4 CORNERS AREA. WITH MOIST AIRMASS OVER
NM...THE EAST FLOW WILL KEEP SOUTH CENTRAL AZ MOIST ALONG WITH
CHANCE OF THUNDERSTORMS. THIS MOIST EAST FLOW EXPECTED TO REACH SE
CA BY LATE SUNDAY/MONDAY FOR PARTLY CLOUDY SKIES AND CHANCE OF
THUNDERSTORMS BY MONDAY AND THEREAFTER. IN ADDITION AVN MOVES
NORTHERN MEXICAN WAVE WESTWARD ALONG AZ SOUTHERN BORDER INTO THE
NORTHERN GULF BY SUNDAY NIGHT / MONDAY. THIS ALONG WITH THE WESTWARD
PUSH OF MOISTURE WILL BRING A CHANCE FOR THUNDERSTORMS INTO FAR SW
AZ AND SE CA. EXTENDED MRF SHOWS LITTLE CHANGE AS MOIST FLOW TO
REMAIN THROUGH EXTENDED PERIOD FOR PARTLY CLOUDY SKIES AND CHANCE OF
THUNDERSTORMS OVER REGION. DKS
Flash Flood, Imperial
- When
- August 11, 7:45 PM PST to 8:45 PM PST
- Where
- Imperial County, Glamis
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 33.040, -115.365 (the zone’s center; the record gives no point)
Strong thunderstorms with very heavy rainfall caused washes and secondary roads to be flooded quickly. A camp ground near Senator Wash Reservoir flooded and campers moved to higher ground to escape the flood waters. State Highway 78, between Glamis and and S34 Ogilby Road, was closed due to the flood waters.
- 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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Flash Flood in Arizona, August 11, 20013 deaths · 1 event
- Tornado and Lightning Strike in Virginia, August 11, 20011 death · $50,000 · F0 · 2 events
- Lightning Strike in New Jersey, August 11, 20011 death · 1 event
- Flash Flood in District of Columbia, August 11, 20012 injured · $6.0 million · 1 event
- Flash Flood in Pennsylvania, August 11, 2001$10 million · 1 event
- Flash Flooding and Lightning Strikes in Virginia, August 11, 2001$873,000 · 17 events
- Flash Flood in Delaware, August 11 to 12, 2001$1.1 million · 1 event
- Lightning Strike in Tennessee, August 11, 200111 injured · 1 event
- Flash Flooding and Damaging Wind in Maryland, August 11, 20011 injured · $220,000 · 7 events
- Lightning Strike in West Virginia, August 11, 20019 injured · 1 event
- Hail and Damaging Winds in Virginia, August 11, 20011 injured · $100,000 · 1.5 in hail · 7 events
- Lightning Strike in Delaware, August 11, 2001$160,000 · 1 event
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: 5262820.