Alert archive / Mississippi / Mesoscale Discussions in 2022

Mesoscale Discussion 914

May 25, 20224 counties in Alabama; Washington Parish, Louisiana; 25 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 25, 2022, 12:12 PM CDT for 4 counties in Alabama; Washington Parish, Louisiana; 25 counties in Mississippi. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: May 25, 2022, 12:12 PM CDT (17:12 UTC)
Expired: May 25, 2022, 1:45 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 273

All 30 counties

Baldwin County, AL, Choctaw County, AL, Mobile County, AL, Washington County, AL, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 116 km from the middle of the area, began a volume at 17:12 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, 5.2 hours before the alert went out and 138 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, 10:51 AM CDT	Mesoscale Discussion	SPC	Barbour, Dale, Geneva, Henry, Houston	84 min
May 25, 2:34 PM CDT	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Marion and 3 more	86 min
May 25, 5:03 PM CDT	Mesoscale Discussion	SPC	Limestone, Madison	117 min
May 25, 5:29 PM CDT	Mesoscale Discussion	SPC	Baldwin, Butler, Choctaw, Clarke, Conecuh, Dallas and 6 more	2 hr
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, 6:36 PM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Cameron, Catahoula, Concordia and 21 more	54 min

Nearby

Mesoscale Discussions in Mississippi, 2022 Mesoscale Discussions in Alabama, 2022 Mesoscale Discussions in Louisiana, 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.