Delaware County, OK tornado warnings

How many tornado warnings does Delaware County get?

From 2016 to 2025, the National Weather Service included Delaware County in 52 tornado warnings, about 5.2 a year. Since 2008, one tornado warning that included Delaware County was raised to a tornado emergency for at least part of the warned area. Severe thunderstorm warnings were more common: 322 severe thunderstorm warnings, about 32 a year. Since the Weather Service started the tag in 2021, 7 severe thunderstorm warnings that included Delaware County were tagged destructive (winds of 80 mph or more, or hail 2.75 inches or larger) for at least part of the warned area.

The table runs from 2008, the first full year the National Weather Service drew an outline around every warning.

Tornado history of Delaware County

70 tornadoes have been recorded in Delaware County since 1950: 11 rated 0, 34 rated 1, 17 rated 2, 6 rated 3, 2 unrated on the F or EF scale. Along their full paths in Oklahoma, these tornadoes injured 38 people. The most came in May (37) and April (14).

Strongest: F3 on March 12, 2006, 29 miles long in Oklahoma; F3 on April 7, 1980, 24.8 miles long in Oklahoma.

Most recent tornadoes

* From National Weather Service Storm Events reports; the rating can still change.

Other storms in Delaware County

Storm reports in Delaware County in the NOAA Storm Events Database through Jun 30, 2026. The largest hail reported in the county was 3 inches across.

Recent hail, wind and flash floods

• Jun 13, 2026 · Thunderstorm wind, 75 mph · Grove, OK
• Jun 8, 2026 · Flash flood · Grove Airport, OK
• Apr 28, 2026 · Hail, 1.75 in · Kansas, OK
• Apr 25, 2026 · Hail, 1 in · Grove, OK
• Jun 17, 2025 · Thunderstorm wind, 64 mph · Grove, OK
• May 18, 2025 · Hail, 1 in · Kansas, OK