Alert archive / Oklahoma / Red Flag Warnings in 2026

Red Flag Warning 30, NWS Norman, OK

May 18, 20266 counties in Oklahoma; Foard County, Hardeman County, Texas

NWS Norman, OK issued this red flag warning at May 18, 2026, 1:24 AM CDT for 6 counties in Oklahoma; Foard County, Hardeman County, Texas. It took effect at May 18, 2026, 1:00 PM CDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 18, 2026, 1:24 AM CDT (06:24 UTC)
In effect from: May 18, 2026, 1:00 PM CDT
Expired: May 18, 2026, 9:00 PM CDT
In force: 8 hr
Issued by: NWS Norman, OK

Counties Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Roger Mills County, OK, Foard County, TX, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 119 km from the middle of the area, began a volume at 06:27 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 6.4 hours before the alert went out and 180 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 5982 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: -21 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 red flag 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 red flag warning went out at May 17, 6:23 PM CDT, 7 hours 1 minute earlier.

Area forecast discussion, May 17, 6:23 PM CDT, 7 hours 1 minute 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
May 18, 4:07 PM CDT	Special Weather Statement	OUN	Washita	23 min
May 18, 4:19 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	41 min
May 18, 4:30 PM CDT	Special Weather Statement	OUN	Greer	30 min
May 18, 4:41 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	25 min
May 18, 4:52 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson, Kiowa	38 min
May 18, 5:07 PM CDT	Special Weather Statement	OUN	Custer	23 min
May 18, 5:25 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	35 min
May 18, 5:26 PM CDT	Special Weather Statement	OUN	Washita	34 min
May 18, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Roger Mills, Washita	33 min
May 18, 6:00 PM CDT	Special Weather Statement	OUN	Kiowa	30 min
May 18, 6:06 PM CDT	Special Weather Statement	OUN	Jackson	24 min
May 18, 6:13 PM CDT	Special Weather Statement	OUN	Custer	32 min
May 18, 6:27 PM CDT	Special Weather Statement	OUN	Custer	33 min
May 18, 6:30 PM CDT	Special Weather Statement	OUN	Greer, Harmon, Jackson	30 min
May 18, 6:44 PM CDT	Special Weather Statement	OUN	Major	31 min
May 18, 4:06 PM CDT	Special Weather Statement	OUN	Hardeman	24 min
May 18, 5:02 PM CDT	Special Weather Statement	OUN	Hardeman	28 min

Nearby

Red Flag Warnings in Oklahoma, 2026 Red Flag Warnings in Texas, 2026 Every red flag 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.