Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 899, NWS Norman, OK

July 11, 20254 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 11, 2025, 7:24 PM CDT for 4 counties in Oklahoma. It was in force for 36 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: Jul 11, 2025, 7:24 PM CDT (00:24 UTC)
Expired: Jul 11, 2025, 8:00 PM CDT
In force: 36 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK, Major County, OK

The radar

The Vance AFB radar (KVNX), 21 km from the middle of the area, began a volume at 00:26 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

Norman, OK (KOUN), launched 00:00Z, 0.4 hours before the alert went out and 161 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: 1646 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1531 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 11, 6:35 PM CDT, 49 minutes earlier.

Area forecast discussion, Jul 11, 6:35 PM CDT, 49 minutes before

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In the hours before

Special weather statement, Jul 11, 5:03 PM CDT, 2 hours 21 minutes before

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Special weather statement, Jul 11, 5:27 PM CDT, 1 hour 57 minutes before

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Special weather statement, Jul 11, 5:58 PM CDT, 1 hour 26 minutes before

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Special weather statement, Jul 11, 6:32 PM CDT, 52 minutes before

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Special weather statement, Jul 11, 6:57 PM CDT, 27 minutes before

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Special weather statement, Jul 11, 7:08 PM CDT, 16 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 7:08 PM CDT	Special Weather Statement	OUN	Garfield	37 min
Jul 11, 7:57 PM CDT	Special Weather Statement	OUN	Garfield	33 min
Jul 11, 9:47 PM CDT	Special Weather Statement	OUN	Alfalfa	28 min
Jul 11, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	31 min
Jul 12, 2:57 AM CDT	Special Weather Statement	OUN	Harper	33 min
Jul 12, 3:27 AM CDT	Special Weather Statement	OUN	Harper	33 min
Jul 12, 11:35 AM CDT	Special Weather Statement	OUN	Blaine	25 min
Jul 12, 11:59 AM CDT	Special Weather Statement	OUN	Blaine, Major	31 min
Jul 12, 12:18 PM CDT	Areal Flood Advisory	OUN	Carter, Murray	3 hr
Jul 12, 1:20 PM CDT	Areal Flood Advisory	OUN	Grant	3 hr
Jul 12, 1:36 PM CDT	Special Weather Statement	OUN	Garfield	24 min
Jul 12, 1:40 PM CDT	Areal Flood Advisory	OUN	Lincoln	5 hr
Jul 12, 1:50 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	40 min
Jul 12, 1:54 PM CDT	Areal Flood Advisory	OUN	Garfield	3 hr
Jul 12, 1:54 PM CDT	Special Weather Statement	OUN	Logan	36 min
Jul 12, 1:55 PM CDT	Special Weather Statement	OUN	Logan	35 min
Jul 12, 2:09 PM CDT	Special Weather Statement	OUN	Noble	36 min
Jul 12, 2:13 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan	20 min
Jul 12, 2:21 PM CDT	Special Weather Statement	OUN	Stephens	24 min
Jul 12, 2:41 PM CDT	Areal Flood Advisory	OUN	Logan, Oklahoma	3 hr
Jul 12, 2:49 PM CDT	Areal Flood Advisory	OUN	Kay, Noble	3 hr
Jul 12, 2:57 PM CDT	Special Weather Statement	OUN	Kay, Noble, Payne	33 min
Jul 12, 3:12 PM CDT	Flash Flood Warning	OUN	Canadian, Logan, Oklahoma	3 hr
Jul 12, 3:49 PM CDT	Flash Flood Warning Considerable damage threat	OUN	Canadian, Oklahoma	3 hr
Jul 12, 3:59 PM CDT	Special Weather Statement	OUN	Jefferson	31 min
Jul 12, 5:20 PM CDT	Special Weather Statement	OUN	Marshall	25 min
Jul 12, 5:34 PM CDT	Special Weather Statement	OUN	Cotton	26 min
Jul 12, 6:40 PM CDT	Special Weather Statement	OUN	Atoka, Coal	35 min
Jul 12, 6:57 PM CDT	Areal Flood Warning	OUN	Canadian, Oklahoma	3 hr
Jul 12, 4:05 PM CDT	Special Weather Statement	OUN	Clay	25 min
Jul 12, 4:52 PM CDT	Areal Flood Advisory	OUN	Clay	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2025 Every severe thunderstorm warning in 2025

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.