Alert archive / Oklahoma / Red Flag Warnings in 2026

Red Flag Warning 9, NWS Norman, OK

March 11, 202620 counties in Oklahoma; 5 counties in Texas

NWS Norman, OK issued this red flag warning at Mar 11, 2026, 1:26 AM CDT for 20 counties in Oklahoma; 5 counties in Texas. It took effect at Mar 11, 2026, 12:00 PM CDT. It was in force for 7 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: Mar 11, 2026, 1:26 AM CDT (06:26 UTC)
In effect from: Mar 11, 2026, 12:00 PM CDT
Expired: Mar 11, 2026, 7:00 PM CDT
In force: 7 hr
Issued by: NWS Norman, OK

All 25 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 97 km from the middle of the area, began a volume at 06:28 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, 6.4 hours before the alert went out and 158 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: 2176 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1175 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 10.4

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 Mar 11, 12:12 AM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Mar 11, 12:12 AM CDT, 1 hour 14 minutes before

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In the hours before

Special weather statement, Mar 10, 9:24 PM CDT, 4 hours 2 minutes before

Special Weather Statement
National Weather Service Norman OK
924 PM CDT Tue Mar 10 2026

OKZ024-025-027>029-110300-
Grady OK-Oklahoma OK-Canadian OK-Cleveland OK-McClain OK-
924 PM CDT Tue Mar 10 2026

...Strong thunderstorms will impact portions of northeastern Grady,
Oklahoma, northern Cleveland, eastern Canadian and northwestern
McClain Counties through 1000 PM CDT...

At 923 PM CDT, Doppler radar was tracking strong, outflow and wake
winds along a line extending from near Oklahoma City to 5 miles
northeast of Harrah.

HAZARD...Wind gusts of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Oklahoma City, Norman, Edmond, Moore, Midwest City, Del City,
Newcastle, Blanchard, Yukon, Bethany, Mustang, Choctaw, Warr Acres,
The Village, Noble, Tuttle, Piedmont, Harrah, Spencer, and Nichols
Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3503 9749 3530 9789 3573 9778 3572 9714
      3538 9714
TIME...MOT...LOC 0223Z 240DEG 27KT 3563 9761 3555 9715

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Mahale

Local storm report, Mar 10, 9:58 PM CDT, 3 hours 28 minutes before

Preliminary Local Storm Report
National Weather Service Norman OK
958 PM CDT Tue Mar 10 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     Hail             5 S Goree               33.40N 99.54W
03/10/2026  E1.75 Inch       Knox               TX   Trained Spotter

&&

MDU

Local storm report, Mar 10, 10:10 PM CDT, 3 hours 16 minutes before

Preliminary Local Storm Report
National Weather Service Norman OK
1010 PM CDT Tue Mar 10 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0915 PM     Tstm Wnd Dmg     Davis                   34.50N 97.12W
03/10/2026                   Murray             OK   Emergency Mngr

            Multiple trees blown down. Time estimated by
            radar.

&&

MDU

Special weather statement, Mar 10, 10:16 PM CDT, 3 hours 10 minutes before

Special Weather Statement
National Weather Service Norman OK
1016 PM CDT Tue Mar 10 2026

OKZ007-110345-
Grant OK-
1016 PM CDT Tue Mar 10 2026

...Strong thunderstorms will impact portions of central Grant County
through 1045 PM CDT...

At 1016 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Renfrow to 4 miles northeast of Nash.
Movement was northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Medford, Renfrow, and Jefferson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3684 9746 3663 9794 3674 9805 3700 9774
      3700 9746
TIME...MOT...LOC 0316Z 224DEG 21KT 3689 9768 3671 9798

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

MDU

Local storm report, Mar 10, 10:19 PM CDT, 3 hours 7 minutes before

Preliminary Local Storm Report
National Weather Service Norman OK
1019 PM CDT Tue Mar 10 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0942 PM     Tstm Wnd Dmg     1 WNW Marietta          33.94N 97.13W
03/10/2026                   Love               OK   Emergency Mngr

            Powerlines down and a semi-trailer
            overturned near Marietta. Time estimated by
            radar.

&&

MDU

Local storm report, Mar 10, 10:58 PM CDT, 2 hours 28 minutes before

Preliminary Local Storm Report
National Weather Service Norman OK
1058 PM CDT Tue Mar 10 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1015 PM     Tstm Wnd Dmg     Mannsville              34.19N 96.88W
03/10/2026                   Johnston           OK   Emergency Mngr

            Roof damage to a building on 18th Avenue
            North. Time estimated by radar.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 7:14 PM CDT	Special Weather Statement	OUN	Woods	46 min
Mar 10, 7:14 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Comanche, Cotton, Kiowa, Tillman	46 min
Mar 10, 7:27 PM CDT	Tornado Warning	OUN	Lincoln, Oklahoma, Pottawatomie	48 min
Mar 10, 7:29 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, McClain, Stephens	46 min
Mar 10, 7:41 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	46 min
Mar 10, 7:42 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Kiowa, Tillman	37 min
Mar 10, 8:08 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Lincoln, Oklahoma	52 min
Mar 10, 8:14 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Grady, Stephens	31 min
Mar 10, 8:14 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady, McClain	46 min
Mar 10, 8:20 PM CDT	Special Weather Statement	OUN	Noble	40 min
Mar 10, 8:32 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain	43 min
Mar 10, 8:37 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	38 min
Mar 10, 8:49 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	56 min
Mar 10, 8:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Alfalfa	39 min
Mar 10, 8:54 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	22 min
Mar 10, 8:55 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	65 min
Mar 10, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	51 min
Mar 10, 9:24 PM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma	36 min
Mar 10, 9:29 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall	46 min
Mar 10, 9:30 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	45 min
Mar 10, 9:32 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	11 min
Mar 10, 9:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Carter, Johnston, Love, Marshall	41 min
Mar 10, 10:07 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Atoka, Bryan, Carter, Coal, Hughes, Johnston and 3 more	38 min
Mar 10, 10:16 PM CDT	Special Weather Statement	OUN	Grant	29 min
Mar 10, 10:23 PM CDT	Areal Flood Advisory	OUN	Carter	3 hr
Mar 10, 10:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	OUN	Atoka, Bryan, Coal, Hughes, Johnston, Marshall and 1 more	67 min
Mar 10, 10:46 PM CDT	Tornado Warning	OUN	Hughes	29 min
Mar 10, 11:04 PM CDT	Tornado Warning	OUN	Atoka, Coal	26 min
Mar 10, 11:18 PM CDT	Areal Flood Advisory	OUN	Hughes, Pontotoc	3 hr
Mar 11, 1:26 AM CDT	Fire Weather Watch	OUN	Alfalfa, Beckham, Blaine, Caddo, Comanche, Custer and 13 more	22 hr
Mar 11, 1:27 PM CDT	Red Flag Warning	OUN	Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 19 more	31 hr

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.