Alert archive / Oklahoma / Mesoscale Discussions in 2025

Mesoscale Discussion 342

April 1, 202510 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2025, 8:22 PM CDT for 10 counties in Oklahoma. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Apr 1, 2025, 8:22 PM CDT (01:22 UTC)
Expired: Apr 1, 2025, 9:15 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 91

Counties Canadian County, OK, Carter County, OK, Cleveland County, OK, Garvin County, OK, Grady County, OK, Lincoln County, OK, McClain County, OK, Oklahoma County, OK, Pottawatomie County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 42 km from the middle of the area, began a volume at 01:26 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, 1.4 hours before the alert went out and 25 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: 1438 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 908 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 350 m²/s²
0-3 km storm-relative helicity: 601 m²/s²
Significant tornado parameter: 4.2
Supercell composite: 12.0

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 2, 2:02 AM CDT	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Carter, Cleveland, Comanche and 36 more	118 min
Apr 2, 2:46 AM CDT	Tornado Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Coal and 40 more	6 hr
Apr 2, 4:30 AM CDT	Mesoscale Discussion	SPC	Adair, Cherokee, Delaware, Ottawa	2 hr
Apr 2, 5:20 AM CDT	Tornado Watch	SPC	Adair, Cherokee, Craig, Delaware, Haskell, Latimer and 8 more	7 hr
Apr 2, 6:57 AM CDT	Mesoscale Discussion	SPC	Cherokee, Craig, Creek, Delaware, Mayes, Muskogee and 6 more	2 hr

Nearby

Mesoscale Discussions in Oklahoma, 2025 Every mesoscale discussion 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.