Oklahoma, 1998

Flash Flood and Hail in Oklahoma, June 30, 1998

June 30, 1998 · NWS TSA · 6 events in 5 counties and zones

Summary of events for June 30 1998:A complex of thunderstorms associated with a slowly southward-moving cold front moved out of southeast Kansas and across far northern Oklahoma on the morning of June 30. Several thunderstorms produced severe wind reports and reports of hail as large as nickels.

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
$20,000
Crop damage
None recorded
Events
6

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.

Summary of events for June 30 1998:A complex of thunderstorms associated with a slowly southward-moving cold front moved out of southeast Kansas and across far northern Oklahoma on the morning of June 30. Several thunderstorms produced severe wind reports and reports of hail as large as nickels.

The radar

The Tulsa radar (KINX), 92 km away, was scanning. The volume nearest the first event began at 09:45 UTC.

Open the radar archive at this moment

Event by event

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

Thunderstorm Wind, Delaware

When
June 30, 3:45 AM CST
Where
Delaware County, 5 mi NE of Grove
Property damage
$10,000
Coordinates
36.630, -94.700

Winds tore loose a floating cafe on Grand Lake. One boat was missing after the storm.

Thunderstorm Wind, Adair

When
June 30, 6:20 AM CST
Where
Adair County, 1 mi N of Watts
Property damage
$300
Coordinates
36.130, -94.570

Several trees were blown down.

Hail, Craig

When
June 30, 9:30 AM CST
Where
Craig County, 1 mi E of Vinita
Measured
0.88 in hail
Coordinates
36.650, -95.130

Thunderstorm Wind, Craig

When
June 30, 9:30 AM CST
Where
Craig County, 1 mi E of Vinita
Measured
52 kt (60 mph)
Property damage
$5,000
Coordinates
36.650, -95.130

Trees and power lines were blown down.

Flash Flood, Rogers

When
June 30, 11:00 AM CST to 1:00 PM CST
Where
Rogers County, South Portion
Coordinates
36.372, -95.604 (the zone’s center; the record gives no point)

Thunderstorm Wind, Tulsa

When
June 30, 11:15 AM CST
Where
Tulsa County, Tulsa
Property damage
$5,000
Coordinates
36.150, -95.950

Power lines were blown down near 11th Street and S. Sheridan.

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 Oklahoma in 1998Every state in 1998This day in weather historyWarnings in Oklahoma, June 1998

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: 5644820, 5644819, 5644821, 5644822, 5644824, 5644823.