Name: Flash Flooding in Texas, September 5, 2001
Start: 2001-09-05T12:30
End: 2001-09-05T17:00
Location: Texas

Where it happened

Every event with a place to put it; 3 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: 6
Property damage: $235,000
Crop damage: $50,000
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.

What happened

The episode as NWS EWX wrote it up.

Widespread showers and thunderstorms over the three counties produced general rainfall of 1 to 2 inches, with isolated totals of up to 6 inches between Seguin, Stockdale and Floresville. Numerous rural roads and low water crossings were closed. High water rescues were required just north of the city of Seguin along Geronimo Creek. Widespread flooding in the town of Stockdale forced over two dozen families to leave their homes. Brief flood damage was reported to the homes.

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 Austin/San Antonio, TX wrote its last area forecast discussion before the first event at Sep 5, 10:45 AM CST, 1 hour 45 minutes earlier.

Area forecast discussion, Sep 5, 10:45 AM CST, 1 hour 45 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1145 AM CDT WED SEP 5 2001

AFTER SOME DELIBERATION DECIDED TO KEEP THE FLASH FLOOD WATCH IN ITS
PREVIOUS LOCATION BUT REDUCED IT IN TIME TO JUST THIS AFTERNOON WITH
AN OPTION TO EXTEND IT INTO TONIGHT IF THE NEED DICTATES.  SOME
RECONFIGURATION IN AREAL COVERAGE MAY ALSO BE REQUIRED.  UPPED POPS
FOR THIS AFTERNOON BASED ON ONGOING CONVECTIVE DEVELOPMENT.  MODELS
AGREE THAT WE MAY HAVE ANOTHER NIGHT OR DAY OF ACTIVITY BEFORE
THINGS SETTLE DOWN THURSDAY NIGHT AND FRIDAY.

.EWX...FLASH FLOOD WATCH THIS AFTERNOON SOUTH CENTRAL
TEXAS.

The radar

The Austin/San Antonio radar (KEWX), 27 km away, was scanning. The volume nearest the first event began at 18:29 UTC.

Open the radar archive at this moment

Event by event

3 flash flood. Local standard time, as filed.

Flash Flood, Comal

When: September 5, 12:30 PM CST to 4:00 PM CST
Where: Comal County, South Portion
Property damage: $5,000
Reported by: LAW ENFORCEMENT
Coordinates: 29.808, -98.278 (the zone’s center; the record gives no point)

Flash Flood, Guadalupe

When: September 5, 12:30 PM CST to 5:00 PM CST
Where: Guadalupe County, North Portion
Injuries: 4 direct, 0 indirect
Property damage: $80,000
Reported by: EMERGENCY MANAGER
Coordinates: 29.583, -97.949 (the zone’s center; the record gives no point)

Flash Flood, Wilson

When: September 5, 2:15 PM CST to 4:00 PM CST
Where: Wilson County, Countywide
Injuries: 2 direct, 0 indirect
Property damage: $150,000
Crop damage: $50,000
Reported by: LAW ENFORCEMENT
Coordinates: 29.174, -98.087 (the zone’s center; the record gives no point)

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.

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

The same day elsewhere

More

Every storm in Texas in 2001 Every state in 2001 This day in weather history Warnings in Texas, September 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: 5266185, 5266186, 5266187.