Alert archive / Arkansas / Mesoscale Discussions in 2026

Mesoscale Discussion 539

April 25, 20268 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2026, 8:49 PM CDT for 8 counties in Arkansas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Apr 25, 2026, 8:49 PM CDT (01:49 UTC)
Expired: Apr 25, 2026, 10:45 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 144...146

Counties Clark County, AR, Garland County, AR, Hot Spring County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 107 km from the middle of the area, began a volume at 01:51 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 147Apr 25, 10:10 PM CDT

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.8 hours before the alert went out and 227 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: 1997 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 974 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.0

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	Benton, Washington	2 hr
Apr 25, 9:46 PM CDT	Mesoscale Discussion	SPC	Calhoun, Columbia, Hempstead, Lafayette, Little River, Miller and 4 more	119 min
Apr 25, 10:12 PM CDT	Severe Thunderstorm Watch	SPC	Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 19 more	8 hr
Apr 25, 11:42 PM CDT	Mesoscale Discussion	SPC	Calhoun, Columbia, Hempstead, Lafayette, Little River, Miller and 3 more	2 hr
Apr 26, 1:31 AM CDT	Mesoscale Discussion	SPC	Columbia, Lafayette, Union	89 min
Apr 26, 5:15 PM CDT	Tornado Watch	SPC	Benton, Washington	7 hr

Nearby

Mesoscale Discussions in Arkansas, 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.