Widespread showers and thunderstorms redeveloped on the evening of July 4 between San Antonio, Boerne, Fredericksburg and Marble Falls. Rainfall from the system was generally in the 2 to 3 inch range, with isolated totals to 6 inches near Boerne.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
The episode as NWS EWX wrote it up.
Widespread showers and thunderstorms redeveloped on the evening of July 4 between San Antonio, Boerne, Fredericksburg and Marble Falls. Rainfall from the system was generally in the 2 to 3 inch range, with isolated totals to 6 inches near Boerne. Most county creeks and streams had remained flooded through the day and with the additional rainfall, immediate flash flooding developed. The flooding continued into the afternoon for most locations.
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 4, 7:35 PM CST, 3 hours 25 minutes earlier.
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
835 PM CDT THU JUL 4 2002
FOR THE MOMENT ONLY ISOLD SHOWERS FROM NEAR SAT TO LLANO WITH ALL
FLASH FLOOD WARNINGS EXPIRED. CONTG TO WATCH CONVECTIVE COMPLEX
TO THE SOUTH WHICH HAS SHOWN SIGNS OF BUILDING TOWARDS THE W AND NW
WHERE STG THETA-E RDG INDICATED BY LAPS AND MID LEVEL MCV MOVG SWD
DOWN THE RIO GRANDE. LATEST RUC RUNS CONTS TO PRODUCE SIGNIFICANT
PCPN FROM BEXAR COUNTY WWD 06Z/09Z...WHILE 18Z MESO-ETA AND AVN
SHOWING LESSER AMOUNTS TO THE WEST OF SAT. HOWEVER WITH PWSS NEAR
2 INCHES...AND PAST HISTORY OF PREVIOUS NIGHTS WILL CONT TO LEAN
TOWARD WETTER SOLN WITH PSBL TRAINING STORMS MOVING/BUILDING NWD
INTO THE SRN/S CNTRL CWA OVERNIGHT. CONTG FFA AS IS WITH NO MAJOR
CHANGES ON UPDATE. 01/03/10/09/23
PREVIOUS DISC...
THE FLASH FLOOD WATCH WILL BE EXTENDED THRU FRIDAY AFTERNOON FOR THE
HILL COUNTRY AND MUCH OF SOUTH CENTRAL TEXAS.
A DANGEROUS FLOODING SITUATION CONTINUES ACROSS THE HILL COUNTRY AND
ADJACENT AREAS OF SOUTH CENTRAL TEXAS AS NUMEROUS STREAMS AND RIVERS
REMAIN IN FLOOD. ANY ADDITIONAL RAINFALL WILL RESULT IN RAPID RUNOFF
DUE TO SATURATED SOILS.
THE UPPER LEVEL TROF/SHEAR AXIS REMAINS NEARLY STATIONARY FROM NEAR
EL INDIO TO ABILENE...WITH LITTLE CHANGE IN LOCATION EXPECTED OVER
THE NEXT 24 HOURS. SHOWERS AND THUNDERSTORMS HAVE ONCE AGAIN FIRED
IN THE TROPICAL AIRMASS THANKS TO DAYTIME HEATING. THESE STORMS
WILL STREAM NORTHWARD AND TRAIN ACROSS THE WATCH AREA THIS AFTERNOON
AND EVENING...GENERALLY EAST OF A LINE FROM HARPER TO SABINAL AND
COTULLA.
THE VORT MAX CURRENTLY LOCATED OVER DEEP SOUTH TEXAS IS FCST BY THE
MESOETA TO MOVE NORTHWARD THIS EVENING AND TONIGHT. THE RESULT WILL
BE ANOTHER MCS DEVELOPING AND IMPACTING THE FLASH FLOOD WATCH AREA.
MODELS STILL TRY TO DRIFT THIS DISTURBANCE WESTWARD BUT THIS IS HAS
NOT OCCURRED DUE TO THE TRAPPING UPPER RIDGE TO THE NORTH. IT IS
MORE LIKELY THIS UPPER LEVEL FEATURE WILL SLOWLY WEAKEN AND RAIN
ITSELF OUT.
A QUICK LOOK AT THE EXTENDED MODELS/FCST LOOKS WET. THE MRF/AVN
SOLUTIONS TRY TO BRING A BACKDOOR FRONT INTO THE HILL COUNTRY BY THE
LATTER HALF OF THE WEEK...BECOMING STATIONARY.
.EWX...FLASH FLOOD WATCH TONIGHT AND FRIDAY FOR THE HILL COUNTRY
AND MUCH OF SOUTH CENTRAL TEXAS...GENERALLY WEST OF THE
I-35 CORRIDOR.The Austin/San Antonio radar (KEWX), 55 km away, was scanning. The volume nearest the first event began at 04:57 UTC.
6 flash flood. Local standard time, as filed.
inches. With streams and creeks still flooded, flash flooding redeveloped over most county roads, continuing until noon.
An additional 2 to 3 inches of rain fell over the county, with up to 5 inches in the southeast. Flash flooding developed very quickly and continued through the morning.
Generally 2 to 3 inches of rain fell over Blanco County, with isolated totals to 5 inches in the extreme southern part. Flash flooding redeveloped almost immediately and continued through the morning.
An additional 1 to 2 inches of rain fell over Comal County, with isolated totals of up to 4 inches just west of New Braunfels. Flash flooding redeveloped almost immediately and continued until the mid afternoon.
General 2 inch rainfall over Burnet County, with isolated totals to 4 inches south of Marble Falls, caused flash flooding to redevelop very quickly. It continued into the mid afternoon.
The additional rainfall over Kendall County averaged near 2 inches with up to 6 inches in the Boerne area. Flash flooding redeveloped immediately, as creeks and streams remained flooded countywide.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2002Every state in 2002This day in weather historyWarnings in Texas, July 2002
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: 5312179, 5312180, 5312181, 5312255, 5312256, 5312257.