Texas, 2006

Flash Flooding and Hail in Texas, April 18, 2006

April 18, 2006 · NWS EWX · 17 events in 8 counties and zones

14 hail, 2 flash flood, 1 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. 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
$50,000
Crop damage
None recorded
Events
17

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 Austin/San Antonio, TX wrote its last area forecast discussion before the first event at Apr 18, 1:22 PM CST, 3 hours 43 minutes earlier.

Area forecast discussion, Apr 18, 1:22 PM CST, 3 hours 43 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
ISSUED BY NATIONAL WEATHER SERVICE BROWNSVILLE TX
222 PM CDT TUE APR 18 2006

.DISCUSSION...
RECORD HEAT AND THE DRY LINE MAY HAVE THE SIDE EFFECT OF SOME
BRIEF BORDERLINE SEVERE WEATHER THIS AFTERNOON. LIFTED INDICES
OF -6 RUNNING FROM DRT TO BURNET AND CAPE FROM 1500-2000 IN THE
HILL COUNTRY AHEAD OF THE SLOWLY ADVANCING DRYLINE. CONVECTIVE
INHIBITION IS STILL FAIRLY STRONG...BUT TEMPS IN THE MID TO UPPER
90S ARE GETTING CLOSE TO BREAKING THE CAP. TCU NOTED ON LATEST VIS
IMAGERY ALONG THE DRYLINE FROM JCT TO MASON. RIGHT NOW FEEL THAT
CAP IS A BIT TOO STRONG FOR A LARGE NUMBER OF CELLS...BUT A FEW
SHOULD BE ABLE TO POP THROUGH AND BRIEFLY GO SEVERE WITH THE MAIN
THREAT BEING WIND GUSTS AND HAIL. FRONT/DRYLINE PUSHES FURTHER
INTO TEXAS ON WEDNESDAY BEFORE RETREATING WEDNESDAY NIGHT. AS IT
RETREATS...A VORT MAX SWEEPS THROUGH OVERHEAD. THIS WILL ADD LIFT
AND SPARK SOME SHOWER AND THUNDERSTORM ACTIVITY. SOUTHWEST FLOW
ALOFT WILL CONTINUE TO BRING IN VORTS DURING THE WEEKEND INTO
EARLY NEXT WEEK...BRINGING A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HAVE NOT YET GONE WHOLEHEARTEDLY WITH POPS AFTER
THURSDAY ATTM UNTIL WE CAN SIGNIFICANTLY BREAK THIS DRY PATTERN.

&&

.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY              65  89  66  86 /  10  10  40  30
AUSTIN BERGSTROM INTL AIRPORT  65  89  66  87 /  10  10  40  30
DEL RIO INTL AIRPORT           69  93  70  87 /  10  10  40  30
SAN ANTONIO INTL AIRPORT       65  90  68  83 /  10  10  40  30

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

STRAUB
Hazardous weather outlook, Apr 18, 11:06 AM CST, 5 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
ISSUED BY NATIONAL WEATHER SERVICE BROWNSVILLE TX
1206 PM CDT TUE APR 18 2006

TXZ171>173-183>194-202>209-217>225-228-191100-
ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DE WITT-
DIMMIT-EDWARDS-FAYETTE-FRIO-GILLESPIE-GONZALES-GUADALUPE-HAYS-KARNES-
KENDALL-KERR-KINNEY-LAVACA-LEE-LLANO-MAVERICK-MEDINA-REAL-TRAVIS-
UVALDE-VAL VERDE-WILLIAMSON-WILSON-ZAVALA-
1206 PM CDT TUE APR 18 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED SHOWERS AND THUNDERSTORMS MAY DEVELOP THIS AFTERNOON ACROSS
SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. SOME OF THE STORMS MAY
BECOME SEVERE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY.

THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS WEDNESDAY THROUGH
FRIDAY. SOME OF THESE STORMS MAY BE SEVERE ON WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY.

The radar

The Laughlin AFB radar (KDFX), 109 km away, was scanning. The volume nearest the first event began at 23:03 UTC.

Open the radar archive at this moment

Event by event

14 hail, 2 flash flood, 1 thunderstorm wind. Local standard time, as filed.

Hail, Edwards

When
April 18, 5:05 PM CST to 5:20 PM CST
Where
Edwards County, 20 mi NE of Rocks Spgs
Measured
1 in hail
Reported by
TRAINED SPOTTER
Coordinates
30.217, -99.983

Hail, Kerr

When
April 18, 5:45 PM CST to 6:00 PM CST
Where
Kerr County, Mountain Home
Measured
1.75 in hail
Reported by
LAW ENFORCEMENT
Coordinates
30.167, -99.367

Hail, Gillespie

When
April 18, 6:20 PM CST to 6:30 PM CST
Where
Gillespie County, 12 mi SE of Harper
Measured
1.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
30.183, -99.100

Hail, Gillespie

When
April 18, 6:25 PM CST to 6:35 PM CST
Where
Gillespie County, Willow City
Measured
1.75 in hail
Reported by
AMATEUR RADIO
Coordinates
30.400, -98.700

Hail, Williamson

When
April 18, 6:30 PM CST to 7:00 PM CST
Where
Williamson County, Leander
Measured
2 in hail
Reported by
TRAINED SPOTTER
Coordinates
30.583, -97.850

Hail, Kerr

When
April 18, 6:45 PM CST to 6:55 PM CST
Where
Kerr County, Mountain Home
Measured
1.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
30.167, -99.367

Flash Flood, Gillespie

When
April 18, 7:00 PM CST to 9:00 PM CST
Where
Gillespie County, North Portion
Reported by
LAW ENFORCEMENT
Coordinates
30.317, -98.933

Late afternoon thunderstorms produced a general 1 to 2 inch rainfall over the northern part of Gillespie County, with the maximum totals of up to 3 inches near Doss and just west of Willow City. Flash flooding forced the closure of FM965 and FM648 through the evening.

Hail, Blanco

When
April 18, 7:05 PM CST to 7:10 PM CST
Where
Blanco County, 10 mi SW of Blanco
Measured
0.75 in hail
Reported by
GENERAL PUBLIC
Coordinates
30.000, -98.533

Hail, Blanco

When
April 18, 7:15 PM CST to 7:25 PM CST
Where
Blanco County, Johnson City
Measured
1.75 in hail
Reported by
AMATEUR RADIO
Coordinates
30.283, -98.400

Hail, Williamson

When
April 18, 7:30 PM CST to 7:40 PM CST
Where
Williamson County, Cedar Park
Measured
1.75 in hail
Reported by
AMATEUR RADIO
Coordinates
30.500, -97.817

Hail, Kendall

When
April 18, 7:30 PM CST to 7:45 PM CST
Where
Kendall County, Kendalia
Measured
2.5 in hail
Property damage
$50,000
Reported by
NEWSPAPER
Coordinates
29.967, -98.517

Hail up to the size of baseballs destroyed windshields and dented cars as well as breaking hundreds of windows in homes in and around Kendalia.

Flash Flood, Blanco

When
April 18, 8:00 PM CST to 11:00 PM CST
Where
Blanco County, Blanco
Reported by
LAW ENFORCEMENT
Coordinates
30.100, -98.417

Early evening thunderstorms spreading eastward from Gillespie County dropped general 1 to 2 inch rains over the central part of Blanco County. Highest totals were 3 inches between Blanco and Johnson City. Flash flooding closed FM1323 and FM2766 through much of the evening.

Hail, Blanco

When
April 18, 8:00 PM CST to 8:10 PM CST
Where
Blanco County, Twin Sisters
Measured
1.75 in hail
Reported by
GENERAL PUBLIC
Coordinates
30.000, -98.400

Hail, Williamson

When
April 18, 8:05 PM CST to 8:15 PM CST
Where
Williamson County, Liberty Hill
Measured
0.88 in hail
Reported by
GENERAL PUBLIC
Coordinates
30.667, -97.917

Thunderstorm Wind, Hays

When
April 18, 8:25 PM CST to 8:50 PM CST
Where
Hays County, Dripping Spgs
Measured
70 kt (81 mph) estimated gust
Reported by
BROADCAST MEDIA
Coordinates
30.200, -98.083

Severe thunderstorm winds knocked over power lines in the Dripping Springs area. Power was reported out to homes for 3 hours.

Hail, Travis

When
April 18, 9:03 PM CST to 9:15 PM CST
Where
Travis County, 4 mi SW of Austin
Measured
1 in hail
Reported by
GENERAL PUBLIC
Coordinates
30.250, -97.800

Hail, Travis

When
April 18, 9:25 PM CST to 9:40 PM CST
Where
Travis County, 9 mi SW of Austin
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
30.183, -97.850

What these are

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 Texas in 2006Every state in 2006This day in weather historyWarnings in Texas, April 2006

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: 5496631, 5496632, 5496633, 5496634, 5496636, 5496635, 5496672, 5496673, 5496674, 5496675, 5496676, 5496677, 5496678, 5496679, 5496680, 5496681, 5496682.