Alert archive / Oklahoma / Mesoscale Discussions in 2026

Mesoscale Discussion 548

April 26, 202615 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2026, 1:56 PM CDT for 15 counties in Oklahoma. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Apr 26, 2026, 1:56 PM CDT (18:56 UTC)
Expired: Apr 26, 2026, 3:00 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

Counties Blaine County, OK, Canadian County, OK, Creek County, OK, Garfield County, OK, Grant County, OK, Hughes County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Noble County, OK, Okfuskee County, OK, Pawnee County, OK, Payne County, OK, Seminole County, OK

The radar

The Norman radar (KTLX), 89 km from the middle of the area, began a volume at 19:00 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 152Apr 26, 5:15 PM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 6.9 hours before the alert went out and 316 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: 5 J/kg
Mixed-layer CIN: -295 J/kg
Mixed-layer LCL: 1183 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 25, 7:43 PM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Craig, Delaware, Mayes, Nowata and 6 more	2 hr
Apr 25, 8:05 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Major, Woods, Woodward	85 min
Apr 25, 8:27 PM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Coal, Garvin, Johnston, Marshall and 3 more	2 hr
Apr 25, 10:12 PM CDT	Severe Thunderstorm Watch	SPC	McCurtain	8 hr
Apr 26, 3:25 PM CDT	Mesoscale Discussion	SPC	Comanche, Cotton	2 hr
Apr 26, 3:55 PM CDT	Tornado Watch	SPC	Caddo, Carter, Comanche, Cotton, Garvin, Grady and 6 more	6 hr
Apr 26, 5:00 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Creek, Garfield, Grant, Kay, Kingfisher and 12 more	2 hr
Apr 26, 5:15 PM CDT	Tornado Watch	SPC	Adair, Cherokee, Craig, Creek, Delaware, Garfield and 13 more	7 hr
Apr 26, 5:31 PM CDT	Mesoscale Discussion	SPC	Cotton, Jefferson	89 min

Nearby

Mesoscale Discussions in Oklahoma, 2026 Every mesoscale discussion 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.