Texas, 2002

Flash Flooding in Texas, July 2 to 3, 2002

July 2 to 3, 2002 · NWS EWX · 8 events in 8 counties and zones

Additional heavy rainfall developing over Gillespie and Llano Counties, as well as between Fayette and Travis Counties, caused low water crossings to fill quickly and redeveloped flash flooding across the area. The showers and thunderstorms spread westward through mid morning.

Where it happened

Every event with a place to put it; 8 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
8

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.

Additional heavy rainfall developing over Gillespie and Llano Counties, as well as between Fayette and Travis Counties, caused low water crossings to fill quickly and redeveloped flash flooding across the area. The showers and thunderstorms spread westward through mid morning.

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 Jul 2, 2:10 AM CST, 3 hours 35 minutes earlier.

Area forecast discussion, Jul 2, 2:10 AM CST, 3 hours 35 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
310 AM CDT TUE JUL 2 2002

FLASH FLOOD WATCH WILL CONTINUE AREAWIDE TODAY AND TONIGHT. UPPER
TROUGH MEANDERING ACROSS AREA TODAY WILL COMBINE WITH RICH MOISTURE
PLUMES OFF THE GULF TO ONCE AGAIN PRODUCE AN EXCELLENT CHANCE OF
TROPIC-LIKE SHOWERS AND THUNDERSTORMS.  UPPER TROUGH AXIS WILL BEGIN
MOVING WEST LATE TONIGHT AND WEDNESDAY WITH THE FOCUS SHIFTING
WESTWARD INTO THE WESTERN HILLS AND RIO GRANDE PLAINS.  BY
INDEPENDENCE DAY...MUCH OF THE ACTIVITY SHIFTS WEST WITH UPPER
RIDGING BUILDING IN FROM THE EAST.  EASTERLIES RETURN OVER THE
WEEKEND WITH A MINOR WAVE MOVING THROUGH EARLY MONDAY. GRADUAL
RIDGING ALOFT NEXT TUESDAY AS MAMMOTH BLOCKY RIDGE BUILDS OVER THE
WESTERN U.S..

PRELIMS...
AUS TE 080/071 088/072 093 +522
DRT TT 083/072 084/074 092 5754
SAT TE 082/073 088/073 092 8532

.EWX...FLASH FLOOD WATCH ENTIRE CWA THRU TONIGHT.

The radar

The Austin/San Antonio radar (KEWX), 42 km away, was scanning. The volume nearest the first event began at 11:47 UTC.

Open the radar archive at this moment

Event by event

8 flash flood. Local standard time, as filed.

Flash Flood, Caldwell

When
July 2, 5:45 AM CST to 1:00 PM CST
Where
Caldwell County, West Portion
Reported by
LAW ENFORCEMENT
Coordinates
29.837, -97.620 (the zone’s center; the record gives no point)

General 3 to 4 inch rainfall was indicated over the western part of Caldwell County. Flash flooding was reported, but little damage was indicated to roads at this time.

Flash Flood, Hays

When
July 2, 5:45 AM CST to 7:00 PM CST
Where
Hays County, Countywide
Reported by
LAW ENFORCEMENT
Coordinates
30.058, -98.031 (the zone’s center; the record gives no point)

General 3 to 4 inch rains fell over the county, with isolated totals of up to 6 inches in the west. Flash flooding redeveloped very quickly. More than 70 roads were reported to be closed. Damage was widespread to rural roads, mainly in the western part of the county.

Flash Flood, Llano

When
July 2, 6:30 AM CST to 6:00 PM CST
Where
Llano County, Countywide
Reported by
LAW ENFORCEMENT
Coordinates
30.706, -98.684 (the zone’s center; the record gives no point)

General 3 to 4 inch totals over the county brought the flash flooding of low water crossings over the county from near sunrise into the late afternoon. Damage was generally to roads in the county, and was reported to be very spotty.

Flash Flood, Fayette

When
July 2, 7:00 AM CST to 5:00 PM CST
Where
Fayette County, South Portion
Reported by
LAW ENFORCEMENT
Coordinates
29.877, -96.920 (the zone’s center; the record gives no point)

General 2 inch totals fell over the county with isolated amounts of up to 5 inches in the south part of the county. Flash flooding was reported between Muldoon, Flatonia and Schulenburg from through much of the morning and afternoon. Scattered damage was reported to roads in the south part of the county.

Flash Flood, Travis

When
July 2, 7:30 AM CST to 6:00 PM CST
Where
Travis County, Countywide
Reported by
EMERGENCY MANAGER
Coordinates
30.335, -97.782 (the zone’s center; the record gives no point)

General 3 to 4 inch rainfall over the county was indicated, with isolated totals of up to 7 inches. Flash flooding redeveloped very quickly in the morning and continued into the afternoon. A sinkhole was reported at Burnet Road and Koenig Lane. Walnut Creek flooded out mobile homes in East Austin. Widespread damage has been reported to roads and bridges.

Flash Flood, Bastrop

When
July 2, 7:30 AM CST to 3:00 PM CST
Where
Bastrop County, South Portion
Reported by
LAW ENFORCEMENT
Coordinates
30.104, -97.312 (the zone’s center; the record gives no point)

General 2 to 3 inch totals fell across the county. Flash flooding was spotty over the county from the morning into the mid afternoon.

Flash Flood, Williamson

When
July 2, 10:00 AM CST to 2:00 PM CST
Where
Williamson County, Countywide
Reported by
LAW ENFORCEMENT
Coordinates
30.648, -97.601 (the zone’s center; the record gives no point)

General 2 to 3 inch totals over the county, with isolated amount of up to 4 inches, was sufficient to begin flash flooding in the mid morning and continue into the mid afternoon. More than 30 roads were reported flooded. Damage is reported to roads and bridges.

Flash Flood, Bexar

When
July 2, 10:00 AM CST to July 3, 5:00 AM CST
Where
Bexar County, Countywide
Reported by
EMERGENCY MANAGER
Coordinates
29.449, -98.520 (the zone’s center; the record gives no point)

Additional 3 to 4 inch totals fell across the county, with as much as 9 inches in some locations. Flash flooding developed immediately and continued through the remainder of the day, into the evening, and finally ended in the early morning hours of July 3. More than 100 freeways or streets were closed. Flooding closed Interstate 10 just north of San Antonio. Public safety officers in boats, high-water vehicles and helicopters staged rescues across San Antonio. Damage by now was widespread to roads and bridges across Bexar County, with numerous evacuations and considerable damage to homes.

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 2002Every state in 2002This day in weather historyWarnings in Texas, July 2002

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: 5311695, 5311696, 5311697, 5311698, 5311699, 5311700, 5311764, 5311765.