Alert archive / Mississippi / Mesoscale Discussions in 2013

Mesoscale Discussion 1282

June 28, 201315 counties in Alabama; 32 counties in Mississippi; 8 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2013, 6:16 AM CDT for 15 counties in Alabama; 32 counties in Mississippi; 8 counties in Tennessee. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Jun 28, 2013, 6:16 AM CDT (11:16 UTC)
Expired
Jun 28, 2013, 7:45 AM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 55 counties

Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene 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, 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, Itawamba County, MS, Kemper County, MS, Lafayette County, MS, Lee County, MS, Lowndes County, MS, Marshall County, MS, Monroe County, MS, Montgomery 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, Union County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Chester County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Lawrence County, TN, McNairy County, TN, Shelby County, TN, Wayne County, TN

The radar

The Columbus AFB radar (KGWX), 46 km from the middle of the area, began a volume at 11:19 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

Little Rock, AR (KLZK), launched 00:00Z, 11.3 hours before the alert went out and 159 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 2013-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4660 joules per kilogram.LCLEL10008507005003002001001 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 2013-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939Sfc1 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
4660 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1631 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 9:42 AM CDTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Cullman, Dallas and 17 more2 hr
Jun 28, 11:26 AM CDTSevere Thunderstorm WatchSPCAutauga, Baldwin, Barbour, Bibb, Bullock, Butler and 36 more9 hr
Jun 28, 1:11 PM CDTMesoscale DiscussionSPCAutauga, Baldwin, Barbour, Bullock, Butler, Chambers and 31 more94 min
Jun 28, 3:23 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Choctaw, Clarke, Coffee, Conecuh and 9 more97 min
Jun 28, 5:25 PM CDTSevere Thunderstorm WatchSPCAutauga, Chilton, Dallas, Greene, Hale, Lowndes and 4 more7 hr
Jun 28, 4:17 AM CDTMesoscale DiscussionSPCBenton, DeSoto, Marshall, Tate, Tippah, Tunica58 min
Jun 28, 5:18 AM CDTSevere Thunderstorm WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more8 hr
Jun 28, 12:34 PM CDTMesoscale DiscussionSPCAttala, Bolivar, Carroll, Claiborne, Coahoma, Copiah and 15 more2 hr
Jun 28, 4:41 PM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Grenada, Hinds, Holmes and 16 more94 min

Nearby

Mesoscale Discussions in Mississippi, 2013Mesoscale Discussions in Alabama, 2013Mesoscale Discussions in Tennessee, 2013Every mesoscale discussion in 2013

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.