Alert archive / Mississippi / Mesoscale Discussions in 2019

Mesoscale Discussion 1149

June 19, 20194 states

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2019, 9:58 PM CDT for 4 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued
Jun 19, 2019, 9:58 PM CDT (02:58 UTC)
Expired
Jun 19, 2019, 11:00 PM CDT
In force
62 min
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 64 counties

Bibb County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Marion County, AL, Morgan County, AL, Pickens County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Crittenden County, AR, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Itawamba County, MS, Kemper County, MS, Lafayette County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Chester County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, McNairy County, TN, Shelby County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 31 km from the middle of the area, began a volume at 03:01 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 (KLZK), launched 00:00Z, 3.0 hours before the alert went out and 165 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 00:00Z on 2019-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1411 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, Little Rock, AR at 00:00Z on 2019-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
1411 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1648 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.2

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
Jun 19, 10:24 PM CDTSevere Thunderstorm WatchSPCBibb, Blount, Calhoun, Cherokee, Chilton, Cleburne and 25 more7 hr
Jun 20, 2:34 AM CDTMesoscale DiscussionSPCAutauga, Bibb, Blount, Calhoun, Chilton, Clay and 22 more56 min
Jun 20, 11:02 AM CDTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Coffee, Covington and 14 more118 min
Jun 20, 1:00 PM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bullock, Butler, Chambers, Chilton and 28 more8 hr
Jun 20, 6:16 PM CDTMesoscale DiscussionSPCBarbour, Coffee, Covington, Crenshaw, Dale, Geneva and 3 more89 min
Jun 19, 8:03 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Chicot, Cleveland, Crittenden and 19 more57 min
Jun 19, 8:42 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Chicot, Cleveland, Conway and 18 more7 hr
Jun 19, 11:43 PM CDTMesoscale DiscussionSPCCalhoun, Chickasaw, Clay, Monroe, Montgomery, Webster and 1 more62 min
Jun 20, 1:31 AM CDTMesoscale DiscussionSPCIssaquena, Sharkey59 min
Jun 20, 3:08 AM CDTMesoscale DiscussionSPCClaiborne, Copiah, Hinds, Jefferson, Madison, Rankin and 4 more97 min
Jun 19, 7:45 PM CDTMesoscale DiscussionSPCAnderson, Benton, Campbell, Cannon, Cheatham, Claiborne and 27 more2 hr
Jun 20, 12:37 AM CDTMesoscale DiscussionSPCChester, Crockett, Decatur, Fayette, Giles, Hardeman and 11 more53 min
Jun 20, 4:00 AM CDTMesoscale DiscussionSPCBledsoe, Bradley, Cannon, Coffee, DeKalb, Grundy and 10 more90 min
Jun 20, 3:17 PM CDTMesoscale DiscussionSPCAnderson, Bledsoe, Campbell, Cannon, Claiborne, Clay and 23 more88 min

Nearby

Mesoscale Discussions in Mississippi, 2019Mesoscale Discussions in Alabama, 2019Mesoscale Discussions in Tennessee, 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.