Alert archive / Texas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 201, NWS Norman, OK

April 15, 2026Jefferson County, Oklahoma; Archer County, Clay County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Apr 15, 2026, 6:00 PM CDT for Jefferson County, Oklahoma; Archer County, Clay County, Wichita County, Texas. It was in force for 45 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: Apr 15, 2026, 6:00 PM CDT (23:00 UTC)
Expired: Apr 15, 2026, 6:45 PM CDT
In force: 45 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Jefferson County, OK, Archer County, TX, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 79 km from the middle of the area, began a volume at 23:01 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 15, 2:31 PM CDT	Tornado Watch	SPC	8 hr
Apr 15, 4:41 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.0 hours before the alert went out and 173 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: 1732 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 354 m²/s²
0-3 km storm-relative helicity: 400 m²/s²
Significant tornado parameter: 3.7
Supercell composite: 14.7

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 Apr 15, 2:29 PM CDT, 3 hours 31 minutes earlier.

Area forecast discussion, Apr 15, 2:29 PM CDT, 3 hours 31 minutes before

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In the hours before

Special weather statement, Apr 15, 4:44 PM CDT, 1 hour 16 minutes before

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Local storm report, Apr 15, 4:51 PM CDT, 1 hour 9 minutes before

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Special weather statement, Apr 15, 4:58 PM CDT, 1 hour 2 minutes before

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Special weather statement, Apr 15, 5:03 PM CDT, 57 minutes before

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Special weather statement, Apr 15, 5:29 PM CDT, 31 minutes before

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Special weather statement, Apr 15, 5:41 PM CDT, 19 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
Apr 14, 7:01 PM CDT	Special Weather Statement	OUN	Caddo, Custer, Kiowa, Washita	29 min
Apr 14, 7:13 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Jackson, Tillman	47 min
Apr 14, 7:21 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	24 min
Apr 14, 7:28 PM CDT	Special Weather Statement	OUN	Caddo, Canadian	62 min
Apr 14, 7:36 PM CDT	Areal Flood Advisory	OUN	Comanche	67 min
Apr 14, 7:42 PM CDT	Special Weather Statement	OUN	Comanche	33 min
Apr 14, 7:49 PM CDT	Special Weather Statement	OUN	McClain	26 min
Apr 14, 7:52 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Stephens, Tillman	38 min
Apr 14, 8:14 PM CDT	Special Weather Statement	OUN	Cleveland	31 min
Apr 14, 8:24 PM CDT	Flash Flood Warning	OUN	Comanche	2 hr
Apr 14, 8:25 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Cotton, Grady, Jefferson, Stephens	50 min
Apr 14, 8:39 PM CDT	Special Weather Statement	OUN	Pottawatomie	36 min
Apr 14, 8:49 PM CDT	Special Weather Statement	OUN	Noble	26 min
Apr 14, 9:01 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Cleveland, Garvin, Grady, McClain, Stephens	44 min
Apr 14, 9:09 PM CDT	Special Weather Statement	OUN	Noble	36 min
Apr 14, 9:17 PM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	28 min
Apr 14, 9:29 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain, Pontotoc, Pottawatomie, Seminole	46 min
Apr 14, 9:32 PM CDT	Areal Flood Advisory	OUN	Garvin, Grady, Stephens	118 min
Apr 14, 10:00 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	45 min
Apr 14, 11:32 PM CDT	Special Weather Statement	OUN	Seminole	43 min
Apr 15, 12:47 AM CDT	Special Weather Statement	OUN	Grady	28 min
Apr 15, 1:10 AM CDT	Special Weather Statement	OUN	Grady	50 min
Apr 15, 1:14 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Grady, McClain	46 min
Apr 15, 1:56 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	49 min
Apr 15, 2:24 AM CDT	Special Weather Statement	OUN	Pottawatomie	36 min
Apr 15, 8:47 AM CDT	Special Weather Statement	OUN	Marshall	28 min
Apr 15, 9:07 AM CDT	Special Weather Statement	OUN	Bryan	23 min
Apr 15, 2:02 PM CDT	Red Flag Warning	OUN	Beckham, Ellis, Harper, Roger Mills, Woods, Woodward	31 hr
Apr 15, 2:43 PM CDT	River Flood Advisory	OUN	Comanche, Cotton	18 hr
Apr 15, 3:42 PM CDT	Special Weather Statement	OUN	Okfuskee	33 min
Apr 15, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson	52 min
Apr 15, 4:44 PM CDT	Special Weather Statement	OUN	Stephens	31 min
Apr 15, 4:53 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, Stephens	23 min
Apr 15, 5:29 PM CDT	Special Weather Statement	OUN	Jefferson	31 min
Apr 15, 5:41 PM CDT	Special Weather Statement	OUN	Johnston	34 min
Apr 15, 5:44 PM CDT	Areal Flood Advisory	OUN	Jefferson	3 hr
Apr 15, 6:05 PM CDT	Areal Flood Advisory	OUN	Carter	3 hr
Apr 15, 6:17 PM CDT	Special Weather Statement	OUN	Payne	28 min
Apr 15, 6:20 PM CDT	Special Weather Statement	OUN	Johnston, Love	25 min
Apr 15, 6:23 PM CDT	Special Weather Statement	OUN	Atoka	37 min
Apr 15, 6:28 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	14 min
Apr 15, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Carter, Coal, Hughes, Jefferson, Johnston and 4 more	48 min
Apr 15, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Love	47 min
Apr 15, 6:53 PM CDT	Flash Flood Warning	OUN	Carter	3 hr
Apr 15, 6:57 PM CDT	Special Weather Statement	OUN	Payne	33 min
Apr 15, 3:18 PM CDT	Special Weather Statement	OUN	Archer	27 min
Apr 15, 3:30 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Clay, Wichita	45 min
Apr 15, 3:45 PM CDT	Special Weather Statement	OUN	Clay	30 min
Apr 15, 4:10 PM CDT	Special Weather Statement	OUN	Baylor	35 min
Apr 15, 4:23 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	52 min
Apr 15, 4:58 PM CDT	Special Weather Statement	OUN	Clay	32 min
Apr 15, 5:03 PM CDT	Special Weather Statement	OUN	Baylor	27 min
Apr 15, 5:13 PM CDT	Severe Thunderstorm Warning	OUN	Archer	47 min
Apr 15, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2026 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.