Alert archive / Mississippi / Mesoscale Discussions in 2019

Mesoscale Discussion 206

March 14, 20197 counties in Alabama; 21 counties in Mississippi; 19 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Mar 14, 2019, 10:32 AM CDT for 7 counties in Alabama; 21 counties in Mississippi; 19 counties in Tennessee. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Mar 14, 2019, 10:32 AM CDT (15:32 UTC)
Expired
Mar 14, 2019, 11:30 AM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 47 counties

Colbert County, AL, Fayette County, AL, Franklin County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Marion County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Hickman County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Madison County, TN, McNairy County, TN, Perry County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 90 km from the middle of the area, began a volume at 15:32 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 3.5 hours before the alert went out and 132 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, Little Rock, AR at 12:00Z on 2019-03-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Little Rock, AR at 12:00Z on 2019-03-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
89 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
401 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Mar 14, 11:47 AM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Jefferson and 12 more88 min
Mar 14, 12:11 PM CDTTornado WatchSPCBibb, Blount, Calhoun, Cherokee, Cleburne, Colbert and 25 more7 hr
Mar 14, 1:01 PM CDTMesoscale DiscussionSPCFayette, Lamar, Marion59 min
Mar 14, 2:58 PM CDTMesoscale DiscussionSPCColbert, Cullman, Fayette, Franklin, Greene, Lamar and 10 more92 min
Mar 14, 5:39 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 22 more96 min
Mar 14, 6:41 PM CDTTornado WatchSPCAutauga, Bibb, Calhoun, Cherokee, Chilton, Clay and 13 more5 hr
Mar 14, 4:47 AM CDTMesoscale DiscussionSPCBolivar, Coahoma, DeSoto, Panola, Quitman, Sunflower and 3 more88 min
Mar 14, 5:28 AM CDTTornado WatchSPCAlcorn, Benton, Bolivar, Calhoun, Coahoma, DeSoto and 13 more7 hr
Mar 14, 7:14 AM CDTMesoscale DiscussionSPCAlcorn, Benton, Bolivar, Calhoun, Carroll, Coahoma and 18 more2 hr
Mar 14, 2:10 PM CDTMesoscale DiscussionSPCClarke, Copiah, Covington, Forrest, Jasper, Jefferson Davis and 14 more95 min
Mar 14, 2:37 AM CDTMesoscale DiscussionSPCHenry, Obion, Stewart, Weakley83 min

Nearby

Mesoscale Discussions in Mississippi, 2019Mesoscale Discussions in Tennessee, 2019Mesoscale Discussions in Alabama, 2019Every mesoscale discussion in 2019

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.