Oklahoma, 1999

Flash Flood and Hail in Oklahoma, December 8 to 9, 1999

December 8 to 9, 1999 · NWS OUN · 18 events in 8 counties and zones

Thunderstorms formed over portions of western Oklahoma during the evening of the 8th and moved eastward. At 2330 CST flash flooding developed in Hydro in Caddo County.

Where it happened

Every event with a place to put it; 2 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
$20,000
Crop damage
None recorded
Events
18

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 OUN wrote it up.

Thunderstorms formed over portions of western Oklahoma during the evening of the 8th and moved eastward. At 2330 CST flash flooding developed in Hydro in Caddo County. Between 3 and 5 inches of rain fell in this area causing water, estimated to be 10 inches deep, to flow across a portion of Highway 58. During the early morning of the 9th, a shop was damaged; a carport was destroyed, and a small barn was blown over in Velma in Stephens County, while in Shawnee in Pottawatomie County, lightning struck a house on Castle Creek Road, exploding a hole in the living room ceiling, destroying a part of the chimney, and damaging the plumbing and electrical systems.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

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

Hail, Kiowa

When
December 8, 8:18 PM CST
Where
Kiowa County, Lone Wolf
Measured
1 in hail
Reported by
EMERGENCY MANAGER
Coordinates
34.980, -99.250

Hail, Comanche

When
December 8, 8:27 PM CST
Where
Comanche County, Cache
Measured
1 in hail
Reported by
AMATEUR RADIO
Coordinates
34.630, -98.620

Hail, Comanche

When
December 8, 8:30 PM CST
Where
Comanche County, 3 mi N of Medicine Park
Measured
1.75 in hail
Reported by
AMATEUR RADIO
Coordinates
34.780, -98.500

Hail, Kiowa

When
December 8, 8:37 PM CST
Where
Kiowa County, Gotebo
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
35.070, -98.880

Hail, Washita

When
December 8, 9:05 PM CST
Where
Washita County, 2 mi W of Canute
Measured
0.75 in hail
Reported by
AMATEUR RADIO
Coordinates
35.420, -99.320

Hail, Woodward

When
December 8, 9:50 PM CST
Where
Woodward County, Mutual
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
36.230, -99.170

Hail, Woodward

When
December 8, 10:03 PM CST
Where
Woodward County, 4 mi SE of Quinlan
Measured
1 in hail
Reported by
EMERGENCY MANAGER
Coordinates
36.420, -99.000

Hail, Caddo

When
December 8, 10:05 PM CST
Where
Caddo County, 3 mi NNW of Anadarko
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
35.100, -98.270

Hail, Kiowa

When
December 8, 10:05 PM CST
Where
Kiowa County, 2 mi E of Roosevelt
Measured
0.75 in hail
Reported by
AMATEUR RADIO
Coordinates
34.850, -98.980

Hail, Kiowa

When
December 8, 10:09 PM CST
Where
Kiowa County, 3 mi E of Mountain Park
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
34.700, -98.900

Hail, Kiowa

When
December 8, 10:11 PM CST
Where
Kiowa County, Mountain Park
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
34.700, -98.950

Hail, Kiowa

When
December 8, 10:26 PM CST
Where
Kiowa County, Cooperton to 5 mi S of Cooperton
Measured
1 in hail
Reported by
AMATEUR RADIO
Coordinates
34.780, -98.870

Hail, Comanche

When
December 8, 11:22 PM CST
Where
Comanche County, 5 mi S of Meers
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
34.720, -98.570

Flash Flood, Caddo

When
December 8, 11:30 PM CST to December 9, 12:00 AM CST
Where
Caddo County, Hydro
Reported by
EMERGENCY MANAGER
Coordinates
35.174, -98.375 (the zone’s center; the record gives no point)

Hail, Comanche

When
December 8, 11:38 PM CST
Where
Comanche County, Medicine Park
Measured
0.88 in hail
Reported by
AMATEUR RADIO
Coordinates
34.730, -98.500

Hail, Tillman

When
December 9, 1:23 AM CST
Where
Tillman County, 11 mi N of Grandfield
Measured
0.75 in hail
Reported by
AMATEUR RADIO
Coordinates
34.400, -98.680

Thunderstorm Wind, Stephens

When
December 9, 2:40 AM CST
Where
Stephens County, Velma
Property damage
$8,000
Reported by
NEWSPAPER
Coordinates
34.450, -97.670

Lightning, Pottawatomie

When
December 9, 3:15 AM CST
Where
Pottawatomie County, Shawnee
Property damage
$12,000
Reported by
NEWSPAPER
Coordinates
35.207, -96.948 (the zone’s center; the record gives no point)

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.
Lightning
A lightning strike that killed, injured or caused damage.

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

The same day elsewhere

More

Every storm in Oklahoma in 1999Every state in 1999This day in weather historyWarnings in Oklahoma, December 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: 5721331, 5721332, 5721333, 5721334, 5721335, 5721336, 5721337, 5721338, 5721339, 5721340, 5721341, 5721342, 5721343, 5721346, 5721344, 5721345, 5721347, 5721348.