Alert archive / Oklahoma / Mesoscale Discussions in 2025

Mesoscale Discussion 554

April 24, 202514 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2025, 10:35 PM CDT for 14 counties in Oklahoma. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: Apr 24, 2025, 10:35 PM CDT (03:35 UTC)
Expired: Apr 25, 2025, 12:00 AM CDT
In force: 85 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 170

Counties Alfalfa County, OK, Blaine County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Roger Mills County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 108 km from the middle of the area, began a volume at 03:36 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.

Severe Thunderstorm Watch 171Apr 24, 10:55 PM CDT

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 3.6 hours before the alert went out and 223 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: 1255 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1377 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

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 24, 7:07 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Harper, Major, Woods, Woodward	83 min
Apr 24, 8:51 PM CDT	Mesoscale Discussion	SPC	Beaver	84 min
Apr 24, 10:54 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Blaine, Caddo, Canadian, Custer, Dewey and 9 more	4 hr
Apr 24, 11:51 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Caddo, Canadian, Creek, Custer and 10 more	84 min

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.