Alert archive / Oklahoma / Mesoscale Discussions in 2023

Mesoscale Discussion 2191

September 24, 2023Little River County, Miller County, Sevier County, Arkansas; 9 counties in Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Sep 24, 2023, 1:14 AM CDT for Little River County, Miller County, Sevier County, Arkansas; 9 counties in Oklahoma; 7 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Sep 24, 2023, 1:14 AM CDT (06:14 UTC)
Expired: Sep 24, 2023, 3:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 694

Counties Little River County, AR, Miller County, AR, Sevier County, AR, Atoka County, OK, Choctaw County, OK, Coal County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, McCurtain County, OK, Pittsburg County, OK, Pushmataha County, OK, Bowie County, TX, Cass County, TX, Franklin County, TX, Lamar County, TX, Morris County, TX, Red River County, TX, Titus County, TX

The radar

The Western Arkansas radar (KSRX), 140 km from the middle of the area, began a volume at 06:18 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, 6.2 hours before the alert went out and 196 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: 2444 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 2057 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.7

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
Sep 23, 9:44 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Conway and 27 more	91 min
Sep 23, 10:14 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Hempstead, Howard and 13 more	9 hr
Sep 24, 3:03 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Burnet, Collin, Coryell, Dallas and 29 more	2 hr
Sep 24, 4:51 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bastrop, Bell, Blanco, Bosque, Burnet and 49 more	8 hr

Nearby

Mesoscale Discussions in Oklahoma, 2023 Mesoscale Discussions in Texas, 2023 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.