Texas, 1999

Flash Flood and Hail in Texas, July 16 to 17, 1999

July 16 to 17, 1999 · NWS AMA · 3 events in 2 counties and zones

A severe thunderstorm developed over the south-central Texas panhandle during the early evening hours producing some damaging winds and hail. Other thunderstorms developed over Palo Duro Canyon State Park in the south-central Texas panhandle producing very heavy rainfall and flash flooding from the evening hours and into the early morning hours.

Where it happened

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.

  • 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
$5,000
Crop damage
None recorded
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 AMA wrote it up.

A severe thunderstorm developed over the south-central Texas panhandle during the early evening hours producing some damaging winds and hail. Other thunderstorms developed over Palo Duro Canyon State Park in the south-central Texas panhandle producing very heavy rainfall and flash flooding from the evening hours and into the early morning hours.

The radar

The Amarillo radar (KAMA), 24 km away, was scanning. The volume nearest the first event began at 23:27 UTC.

Open the radar archive at this moment

Event by event

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

Thunderstorm Wind, Armstrong

When
July 16, 5:30 PM CST
Where
Armstrong County, 9 mi S of Washburn
Measured
57 kt (66 mph)
Property damage
$5,000
Reported by
TRAINED SPOTTER
Coordinates
35.050, -101.580

A storage building was blown over and large tree branches were downed.

Hail, Armstrong

When
July 16, 5:30 PM CST
Where
Armstrong County, 9 mi S of Washburn
Measured
0.75 in hail
Reported by
TRAINED SPOTTER
Coordinates
35.050, -101.580

Flash Flood, Randall

When
July 16, 7:30 PM CST to July 17, 3:00 AM CST
Where
Randall County, 17 mi SE of Canyon
Reported by
PARK/FOREST SERVICE
Coordinates
34.966, -101.897 (the zone’s center; the record gives no point)

Trash dumpsters and two high water markers were washed down the creek at Palo Duro Canyon State Park. The first low water crossing had four feet of water over it and two feet of silt. Texas Park Rangers also reported that the very heavy rainfall was causing rock slides.

What these are

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.
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.

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

The same day elsewhere

More

Every storm in Texas in 1999Every state in 1999This day in weather historyWarnings in Texas, July 1999

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: 5708433, 5708434, 5708435.