Alert archive / Arkansas / Mesoscale Discussions in 2023

Mesoscale Discussion 7

January 2, 202316 counties in Arkansas

The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2023, 3:19 PM CST for 16 counties in Arkansas. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jan 2, 2023, 3:19 PM CST (21:19 UTC)
Expired: Jan 2, 2023, 4:45 PM CST
In force: 86 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 1

Counties Baxter County, AR, Boone County, AR, Cleburne County, AR, Conway County, AR, Faulkner County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Marion County, AR, Newton County, AR, Perry County, AR, Pope County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, Yell County, AR

The radar

The Little Rock radar (KLZK), 116 km from the middle of the area, began a volume at 21:21 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

Springfield, MO (KSGF), launched 12:00Z, 9.3 hours before the alert went out and 154 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 140 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
Jan 2, 11:34 AM CST	Mesoscale Discussion	SPC	Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 20 more	2 hr
Jan 2, 1:22 PM CST	Tornado Watch	SPC	Calhoun, Clark, Cleburne, Cleveland, Columbia, Conway and 39 more	8 hr
Jan 2, 2:02 PM CST	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	118 min
Jan 2, 3:34 PM CST	Tornado Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	6 hr

Nearby

Mesoscale Discussions in Arkansas, 2023 Every mesoscale discussion in 2023

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.