Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 279, NWS Tulsa, OK

June 21, 2026Osage County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 21, 2026, 6:52 AM CDT for Osage County, Oklahoma. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 21, 2026, 6:52 AM CDT (11:52 UTC)
Expired: Jun 21, 2026, 7:30 AM CDT
In force: 38 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Osage County, OK

The radar

The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 11:55 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 11.9 hours before the alert went out and 272 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 516 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1348 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 159 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 6:32 AM CDT, 20 minutes earlier.

Area forecast discussion, Jun 21, 6:32 AM CDT, 20 minutes before

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Hazardous weather outlook, Jun 21, 4:49 AM CDT, 2 hours 3 minutes before

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In the hours before

Special weather statement, Jun 21, 3:48 AM CDT, 3 hours 4 minutes before

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Special weather statement, Jun 21, 5:29 AM CDT, 1 hour 23 minutes before

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Special weather statement, Jun 21, 6:37 AM CDT, 15 minutes before

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The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 5:29 AM CDT	Special Weather Statement	TSA	Osage	61 min
Jun 21, 6:37 AM CDT	Special Weather Statement	TSA	Osage, Washington	53 min
Jun 21, 7:25 AM CDT	Special Weather Statement	TSA	Osage	35 min
Jun 21, 7:30 AM CDT	Areal Flood Advisory	TSA	Osage	3 hr
Jun 21, 7:54 AM CDT	Special Weather Statement	TSA	Nowata, Osage, Washington	36 min
Jun 21, 8:30 AM CDT	Special Weather Statement	TSA	Pawnee, Washington	30 min
Jun 21, 9:14 AM CDT	River Flood Warning	TSA	Ottawa	3 days
Jun 21, 12:00 PM CDT	Flood Watch	TSA	Adair, Cherokee, Craig, Delaware, LeFlore, Mayes and 2 more	21 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2026 Every severe thunderstorm warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.