Alert archive / Alabama / Mesoscale Discussions in 2022

Mesoscale Discussion 16

January 1, 202223 counties in Alabama; 6 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2022, 11:19 PM CST for 23 counties in Alabama; 6 counties in Georgia. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jan 1, 2022, 11:19 PM CST (05:19 UTC)
Expired
Jan 2, 2022, 1:15 AM CST
In force
116 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 7...8
All 29 counties

Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Choctaw County, AL, Cleburne County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Marengo County, AL, Marshall County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Catoosa County, GA, Chattooga County, GA, Dade County, GA, Floyd County, GA, Polk County, GA, Walker County, GA

The radar

The Birmingham radar (KBMX), 40 km from the middle of the area, began a volume at 05:23 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 00:00Z, 5.3 hours before the alert went out and 38 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 00:00Z on 2022-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 227 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 00:00Z on 2022-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 362 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
227 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
965 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
362 m²/s²
0-3 km storm-relative helicity
462 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.6

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, 6:02 PM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 19 more118 min
Jan 1, 6:53 PM CSTTornado WatchSPCCullman, DeKalb, Franklin, Jackson, Lawrence, Limestone and 3 more7 hr
Jan 1, 8:30 PM CSTMesoscale DiscussionSPCJackson60 min
Jan 1, 9:11 PM CSTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Cullman, DeKalb and 17 more64 min
Jan 1, 10:07 PM CSTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more6 hr
Jan 2, 2:19 AM CSTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Choctaw and 17 more116 min
Jan 2, 10:37 AM CSTMesoscale DiscussionSPCCoffee, Covington, Dale, Geneva, Henry, Houston83 min
Jan 2, 12:53 PM CSTMesoscale DiscussionSPCCoffee, Dale, Geneva, Henry, Houston2 hr
Jan 2, 1:17 PM CSTTornado WatchSPCGeneva, Henry, Houston9 hr
Jan 2, 2:48 PM CSTMesoscale DiscussionSPCBaker, Ben Hill, Berrien, Bleckley, Brooks, Calhoun and 32 more117 min
Jan 2, 3:50 PM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 33 more85 min
Jan 2, 4:01 PM CSTTornado WatchSPCAppling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 20 more5 hr
Jan 2, 5:52 PM CSTMesoscale DiscussionSPCAppling, Atkinson, Bacon, Ben Hill, Berrien, Brantley and 32 more113 min

Nearby

Mesoscale Discussions in Alabama, 2022Mesoscale Discussions in Georgia, 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.