Alert archive / Mississippi / Mesoscale Discussions in 2022

Mesoscale Discussion 9

January 1, 20226 counties in Alabama; 21 counties in Mississippi; 8 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2022, 1:57 PM CST for 6 counties in Alabama; 21 counties in Mississippi; 8 counties in Tennessee. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Jan 1, 2022, 1:57 PM CST (19:57 UTC)
Expired
Jan 1, 2022, 3:30 PM CST
In force
93 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 3...4...5
All 35 counties

Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Montgomery County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tallahatchie County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Bedford County, TN, Giles County, TN, Hardin County, TN, Lawrence County, TN, Lincoln County, TN, Marshall County, TN, Moore County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 54 km from the middle of the area, began a volume at 19:58 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

Birmingham, AL (KBMX), launched 12:00Z, 8.0 hours before the alert went out and 199 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2022-01-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 316 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2022-01-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
316 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
210 m²/s²
Significant tornado parameter
0.4
Supercell composite
3.8

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.

IssuedProductOfficeCountiesLasted
Jan 1, 12:38 PM CSTMesoscale DiscussionSPCColbert, Jackson, Lauderdale, Lawrence, Limestone, Madison and 1 more97 min
Jan 1, 12:56 PM CSTTornado WatchSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more6 hr
Jan 1, 3:27 PM CSTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more93 min
Jan 1, 3:52 PM CSTTornado WatchSPCBibb, Blount, Cullman, DeKalb, Etowah, Fayette and 13 more6 hr
Jan 1, 5:53 PM CSTMesoscale DiscussionSPCDeKalb, Jackson, Lawrence, Limestone, Madison, Marshall and 1 more67 min
Jan 1, 11:37 AM CSTMesoscale DiscussionSPCAttala, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw and 27 more113 min
Jan 1, 1:30 PM CSTTornado WatchSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 44 more9 hr
Dec 31, 9:31 PM CSTMesoscale DiscussionSPCCampbell, Cannon, Cheatham, Clay, Davidson, DeKalb and 21 more2 hr
Dec 31, 11:57 PM CSTTornado WatchSPCBenton, Carroll, Cheatham, Chester, Clay, Crockett and 29 more7 hr
Jan 1, 2:07 AM CSTMesoscale DiscussionSPCDyer, Gibson, Henry, Houston, Lake, Lauderdale and 5 more113 min
Jan 1, 10:29 AM CSTMesoscale DiscussionSPCBenton, Cheatham, Dickson, Henry, Houston, Humphreys and 4 more61 min
Jan 1, 10:50 AM CSTTornado WatchSPCBedford, Benton, Carroll, Cheatham, Chester, Clay and 30 more7 hr

Nearby

Mesoscale Discussions in Mississippi, 2022Mesoscale Discussions in Tennessee, 2022Mesoscale Discussions in Alabama, 2022Every 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.