Alert archive / Mississippi / Mesoscale Discussions in 2022

Mesoscale Discussion 919

May 25, 20224 states

The Storm Prediction Center issued this mesoscale discussion at May 25, 2022, 6:36 PM CDT for 4 states. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: May 25, 2022, 6:36 PM CDT (23:36 UTC)
Expired: May 25, 2022, 7:30 PM CDT
In force: 54 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 40%

All 77 counties

Chicot County, AR, Crittenden County, AR, Desha County, AR, Lee County, AR, Phillips County, AR, St. Francis County, AR, Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Tensas Parish, LA, Vermilion Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, DeSoto County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Lafayette County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Pike County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Wilkinson County, MS, Yalobusha County, MS, Yazoo County, MS, Fayette County, TN, Shelby County, TN, Tipton County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 120 km from the middle of the area, began a volume at 23:37 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

Jackson, MS (KJAN), launched 12:00Z, 11.6 hours before the alert went out and 111 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: 118 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
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
May 25, 1:38 AM CDT	Mesoscale Discussion	SPC	Beauregard, Vernon	2 hr
May 25, 9:23 AM CDT	Mesoscale Discussion	SPC	Ascension, Assumption, Concordia, East Baton Rouge, East Carroll, East Feliciana and 23 more	97 min
May 25, 9:37 AM CDT	Severe Thunderstorm Watch	SPC	Ascension, Concordia, East Baton Rouge, East Feliciana, Livingston, Saint Helena and 5 more	7 hr
May 25, 12:12 PM CDT	Mesoscale Discussion	SPC	Washington	93 min
May 25, 2:34 PM CDT	Mesoscale Discussion	SPC	Alcorn, Chickasaw, Clay, Itawamba, Lee, Lowndes and 8 more	86 min
May 25, 5:29 PM CDT	Mesoscale Discussion	SPC	George, Jackson	2 hr
May 25, 5:03 PM CDT	Mesoscale Discussion	SPC	Bedford, Cannon, Cheatham, Coffee, Davidson, DeKalb and 24 more	117 min

Nearby

Mesoscale Discussions in Mississippi, 2022 Mesoscale Discussions in Louisiana, 2022 Mesoscale Discussions in Arkansas, 2022 Every mesoscale discussion in 2022

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.