EF4 Tornado — Osage, Oklahoma

2024-05-06 · near Osage, Osage, Oklahoma

Event narrative

This is the first segment of a two-segment tornado. This tornado developed just north of County Road 1701 southeast of Hominy, where trees were uprooted and snapped. The tornado moved northeast and crossed Highway 20, snapping numerous trees and snapping seven metal power poles. The tornado continued to snap and uproot numerous trees between Highway 20 and Barnsdall. Significant tree damage was found in several locations. A well-built home was destroyed just southwest of town. Multiple vehicles were thrown and rolled, and trees were stubbed and debarked in this area. The tornado then moved into Barnsdall, causing severe damage to the wax plant on the southeast side of town. More than 110 homes and businesses were damaged, 65 of those were destroyed. Numerous trees were stubbed in the area of some of the higher end damage. Two fatalities and at least 33 injuries occurred in Barnsdall. Significant tree damage continued northeast of Barnsdall, a few homes were damaged, and outbuildings were destroyed between Barnsdall and the county line. Based on this damage, maximum estimated wind in this segment of the tornado was 170 to 180 mph. The tornado continued into Washington County.

Wider weather episode

Severe thunderstorms developed over western Oklahoma during the afternoon of the 6th, as a dry line sharpened over the area. These storms developed eastward across central Oklahoma during the afternoon, and then moved into eastern Oklahoma during the evening. Very strong instability developed ahead of the storms, and wind shear became very strong during the mid to late evening, as wind fields strengthened over the region with the approach of a strong upper level disturbance. As a result of this very strong instability and wind shear, supercell thunderstorms evolved as the storms moved east of the dry line. Strengthening low level wind shear promoted the development of tornadoes, one of which became violent as it moved through Osage County. Large hail up to golf ball size and damaging wind gusts also occurred.

A squall line organized as the storms moved into eastern Oklahoma, with several supercells maintaining their structure within the squall line. Damaging wind gusts, large hail to quarter size, and several tornadoes occurred with the squall line as it moved through the area into the early morning of the 7th. One tornado became strong as it moved across portions of Adair County. Locally heavy rainfall resulted in some flash flooding.

View location on OpenStreetMap → (36.3304, -96.3559)

Source: NOAA Storm Events Database, event_id 1184254. Narrative written by the NWS forecast office that issued the report.