Flash Flooding and Hail in Oklahoma, September 7, 1999

Name: Flash Flooding and Hail in Oklahoma, September 7, 1999
Start: 1999-09-07T15:00
End: 1999-09-07T21:05
Location: Oklahoma

September 7, 1999 · NWS TSA · 39 events in 14 counties and zones

Summary of events for September 7 1999:A southward-moving cold front kicked off scattered severe thunderstorms during the heat of the afternoon over areas northwest of Tulsa, while an isolated severe thunderstorm in southern Le Flore County was caused by differential heating over higher terrain. Individual cells eventually evolved into a nearly solid line of thunderstorms that was responsible…

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: $46,000
Crop damage: None recorded
Events: 39

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 TSA wrote it up.

The radar

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

Open the radar archive at this moment

Event by event

22 thunderstorm wind, 15 hail, 2 flash flood. Local standard time, as filed.

Hail, Le Flore

When: September 7, 3:00 PM CST
Where: Le Flore County, 12 mi E of Talihina
Measured: 1 in hail
Reported by: PARK/FOREST SERVICE
Coordinates: 34.750, -94.830

Hail, Le Flore

When: September 7, 3:32 PM CST
Where: Le Flore County, Heavener
Measured: 0.75 in hail
Reported by: UNKNOWN
Coordinates: 34.880, -94.600

Hail, Creek

When: September 7, 3:45 PM CST to 4:05 PM CST
Where: Creek County, Silver City
Measured: 1 in hail
Reported by: GENERAL PUBLIC
Coordinates: 36.080, -96.500

A single storm back-builded over Silver City, causing hail as large as quarters to last for 20 minutes in Silver City.

Hail, Osage

When: September 7, 4:08 PM CST to 4:13 PM CST
Where: Osage County, Webb City
Measured: 0.88 in hail
Reported by: GENERAL PUBLIC
Coordinates: 36.800, -96.700

Hail, Pawnee

When: September 7, 4:10 PM CST
Where: Pawnee County, Terlton
Measured: 1 in hail
Reported by: AMATEUR RADIO
Coordinates: 36.180, -96.480

Hail, Pawnee

When: September 7, 4:19 PM CST
Where: Pawnee County, Cleveland
Measured: 1 in hail
Reported by: AMATEUR RADIO
Coordinates: 36.320, -96.470

Hail, Pawnee

When: September 7, 4:20 PM CST
Where: Pawnee County, 5 mi S of Cleveland
Measured: 0.75 in hail
Reported by: AMATEUR RADIO
Coordinates: 36.250, -96.470

Location: along US Hwy 412

Hail, Osage

When: September 7, 5:05 PM CST to 5:15 PM CST
Where: Osage County, Tallant to Nelagoney
Measured: 2 in hail
Reported by: GENERAL PUBLIC
Coordinates: 36.600, -96.180

There was a report of 1" hail at Tallant at 605 PM and a report of 2" hail at Nelagoney at 615 PM CDT.

Thunderstorm Wind, Osage

When: September 7, 5:19 PM CST
Where: Osage County, 3 mi N of Hominy
Measured: 57 kt (66 mph)
Reported by: AMATEUR RADIO
Coordinates: 36.470, -96.400

Thunderstorm Wind, Osage

When: September 7, 5:37 PM CST
Where: Osage County, 5 mi W of Skiatook
Measured: 57 kt (66 mph)
Reported by: AMATEUR RADIO
Coordinates: 36.370, -96.080

Thunderstorm Wind, Washington

When: September 7, 5:55 PM CST
Where: Washington County, Vera
Measured: 52 kt (60 mph)
Reported by: UNKNOWN
Coordinates: 36.450, -95.880

Thunderstorm Wind, Rogers

When: September 7, 6:00 PM CST
Where: Rogers County, Talala
Property damage: $200
Reported by: GENERAL PUBLIC
Coordinates: 36.530, -95.680

Tree limbs as large as 6-8" in diameter were blown down in Talala.

Hail, Cherokee

When: September 7, 6:00 PM CST
Where: Cherokee County, Welling
Measured: 1 in hail
Reported by: POST OFFICE
Coordinates: 35.880, -94.880

Thunderstorm Wind, Nowata

When: September 7, 6:05 PM CST
Where: Nowata County, Lenapah
Property damage: $100
Reported by: GENERAL PUBLIC
Coordinates: 36.850, -95.630

Large tree branches were blown down.

Thunderstorm Wind, Tulsa

When: September 7, 6:10 PM CST
Where: Tulsa County, Skiatook
Property damage: $100
Reported by: LAW ENFORCEMENT
Coordinates: 36.370, -96.000

Tree limbs were blown onto the main highway in Skiatook.

Hail, Cherokee

When: September 7, 6:22 PM CST
Where: Cherokee County, 2 mi NE of Eldon
Measured: 0.75 in hail
Reported by: GENERAL PUBLIC
Coordinates: 35.950, -94.800

Hail, Adair

When: September 7, 6:25 PM CST
Where: Adair County, Proctor
Measured: 0.75 in hail
Reported by: TRAINED SPOTTER
Coordinates: 35.970, -94.780

Thunderstorm Wind, Pawnee

When: September 7, 6:30 PM CST
Where: Pawnee County, Pawnee
Measured: 61 kt (70 mph)
Property damage: $3,000
Reported by: LAW ENFORCEMENT
Coordinates: 36.330, -96.800

Numerous large tree limbs and severe power lines were blown down by winds estimated at 60-70 mph.

Thunderstorm Wind, Tulsa

When: September 7, 6:30 PM CST
Where: Tulsa County, Owasso
Property damage: $2,000
Reported by: NEWSPAPER
Coordinates: 36.270, -95.850

Power lines were blown down.

Hail, Delaware

When: September 7, 6:40 PM CST
Where: Delaware County, 4 mi W of West Siloam Spgs
Measured: 1.75 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 36.170, -94.670

Thunderstorm Wind, Craig

When: September 7, 6:54 PM CST
Where: Craig County, Vinita
Property damage: $15,000
Reported by: NEWSPAPER
Coordinates: 36.650, -95.150

The roof was blown off of a business in Vinita, and many trees and power lines were blown down.

Thunderstorm Wind, Delaware

When: September 7, 7:00 PM CST to 7:01 PM CST
Where: Delaware County, 3 mi SSW of Cleora
Measured: 61 kt (70 mph)
Property damage: $2,000
Reported by: UNKNOWN
Coordinates: 36.550, -94.980

Winds estimated at 65 miles an hour blew down power lines.

Thunderstorm Wind, Cherokee

When: September 7, 7:00 PM CST
Where: Cherokee County, 10 mi NNE of Tahlequah
Property damage: $100
Reported by: GENERAL PUBLIC
Coordinates: 36.050, -94.900

Large tree limbs were blown down at the Eagle Bluff Resort.

Thunderstorm Wind, Craig

When: September 7, 7:00 PM CST
Where: Craig County, 9 mi SE of Vinita
Measured: 52 kt (60 mph)
Reported by: TRAINED SPOTTER
Coordinates: 36.550, -95.030

Thunderstorm Wind, Rogers

When: September 7, 7:10 PM CST
Where: Rogers County, Tiawah
Property damage: $15,000
Reported by: GENERAL PUBLIC
Coordinates: 36.270, -95.570

A motor home was blown over onto a propane tank, and large tree limbs were blown down.

Thunderstorm Wind, Adair

When: September 7, 7:10 PM CST
Where: Adair County, Christie
Property damage: $100
Reported by: GENERAL PUBLIC
Coordinates: 35.950, -94.700

Large tree limbs were blown down near Christie.

Flash Flood, Cherokee

When: September 7, 7:15 PM CST to 8:15 PM CST
Where: Cherokee County, 4 mi NE of Scraper
Reported by: GENERAL PUBLIC
Coordinates: 35.907, -95.000 (the zone’s center; the record gives no point)

Black Fox Creek overflowed onto OK Hwy 10.

Thunderstorm Wind, Pawnee

When: September 7, 7:15 PM CST
Where: Pawnee County, Maramec
Measured: 52 kt (60 mph)
Reported by: FIRE DEPT/RESCUE SQUAD
Coordinates: 36.250, -96.670

Thunderstorm Wind, Delaware

When: September 7, 7:15 PM CST
Where: Delaware County, Grove
Property damage: $500
Reported by: NEWSPAPER
Coordinates: 36.580, -94.770

Several large trees were blown onto and blocked nearby roadways.

Hail, Delaware

When: September 7, 7:20 PM CST
Where: Delaware County, Zena
Measured: 0.75 in hail
Reported by: EMERGENCY MANAGER
Coordinates: 36.500, -94.850

Thunderstorm Wind, Creek

When: September 7, 7:25 PM CST to 7:39 PM CST
Where: Creek County, Bristow to 11 mi of Bristow
Measured: 61 kt (70 mph)
Property damage: $300
Reported by: TRAINED SPOTTER
Coordinates: 36.000, -96.380

At 825 PM CDT, spotters reported 65 mph winds 11 miles north of Bristow near the intersection of OK Hwys 48 and 33. At 832 PM CDT, spotters reported trees blown down in a field 5 miles northwest of Bristow. At 839 PM CDT, spotters estimated 70 mph winds near Bristow.

Hail, Delaware

When: September 7, 7:33 PM CST
Where: Delaware County, 3 mi W of Colcord
Measured: 0.75 in hail
Reported by: EMERGENCY MANAGER
Coordinates: 36.270, -94.730

Thunderstorm Wind, Creek

When: September 7, 7:43 PM CST
Where: Creek County, 3 mi NNE of Kellyville
Measured: 52 kt (60 mph)
Reported by: AMATEUR RADIO
Coordinates: 35.980, -96.200

Flash Flood, Adair

When: September 7, 7:45 PM CST to 8:45 PM CST
Where: Adair County, Christie
Reported by: GENERAL PUBLIC
Coordinates: 35.884, -94.659 (the zone’s center; the record gives no point)

Tributaries of the Baron Fork Creek near Christie overflowed their banks.

Hail, Creek

When: September 7, 7:46 PM CST
Where: Creek County, Shamrock
Measured: 0.75 in hail
Reported by: AMATEUR RADIO
Coordinates: 35.920, -96.580

Thunderstorm Wind, Creek

When: September 7, 7:46 PM CST
Where: Creek County, Shamrock
Measured: 52 kt (60 mph)
Reported by: AMATEUR RADIO
Coordinates: 35.920, -96.580

Thunderstorm Wind, Tulsa

When: September 7, 8:15 PM CST
Where: Tulsa County, 12 mi SE of Tulsa
Property damage: $100
Reported by: NWS EMPLOYEE(OFF DUTY)
Coordinates: 36.030, -95.800

Four-inch tree limbs were blown down in the Shadow Ridge Addition near 91st Street South and Mingo in Tulsa.

Thunderstorm Wind, Muskogee

When: September 7, 9:00 PM CST
Where: Muskogee County, Ft Gibson
Measured: 52 kt (60 mph)
Reported by: LAW ENFORCEMENT
Coordinates: 35.800, -95.250

Thunderstorm Wind, McIntosh

When: September 7, 9:05 PM CST
Where: McIntosh County, Checotah
Property damage: $8,000
Reported by: EMERGENCY MANAGER
Coordinates: 35.430, -95.520

A tree was blown onto a car in Checotah.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
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

Every storm in Oklahoma in 1999 Every state in 1999 This day in weather history Warnings in Oklahoma, September 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: 5719553, 5719554, 5719556, 5719557, 5719555, 5719709, 5719710, 5719558, 5719559, 5719560, 5719620, 5719622, 5719623, 5719626, 5719621, 5719624, 5719625, 5719627, 5719708, 5719628, 5719636, 5719629, 5719631, 5719635, 5719630, 5719632, 5719637, 5719641, 5719707, 5719633, 5719639, 5719634, 5719640, 5719638, 5719642, 5719643, 5719704, 5719705, 5719706.