Alert archive / Mississippi / Mesoscale Discussions in 2014

Mesoscale Discussion 894

June 8, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2014, 11:24 AM CDT for 4 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Jun 8, 2014, 11:24 AM CDT (16:24 UTC)
Expired
Jun 8, 2014, 12:30 PM CDT
In force
66 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 46 counties

Autauga County, AL, Bibb County, AL, Chilton County, AL, Dallas County, AL, Greene County, AL, Hale County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Ashley County, AR, Chicot County, AR, Columbia County, AR, Union County, AR, Claiborne Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Union Parish, LA, West Carroll Parish, LA, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Noxubee County, MS, Oktibbeha County, MS, Sharkey County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 80 km from the middle of the area, began a volume at 16:27 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

Jackson, MS (KJAN), launched 12:00Z, 4.4 hours before the alert went out and 76 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, Jackson, MS at 12:00Z on 2014-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2135 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, Jackson, MS at 12:00Z on 2014-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.193958Sfc1 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
2135 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
903 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
-24 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.6

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 7, 8:28 PM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Cleburne, Cullman, Etowah and 7 more2 hr
Jun 8, 12:49 PM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Bullock, Chilton, Clay and 21 more8 hr
Jun 8, 1:11 PM CDTMesoscale DiscussionSPCButler, Clarke, Coffee, Conecuh, Covington, Crenshaw and 6 more3 hr
Jun 8, 1:49 PM CDTSevere Thunderstorm WatchSPCButler, Choctaw, Clarke, Coffee, Conecuh, Covington and 8 more7 hr
Jun 8, 3:08 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Chilton, Choctaw, Clay, Coosa and 16 more97 min
Jun 8, 3:23 PM CDTMesoscale DiscussionSPCBarbour, Butler, Clarke, Coffee, Conecuh, Covington and 8 more97 min
Jun 7, 9:55 PM CDTMesoscale DiscussionSPCHoward, Little River, Montgomery, Pike, Polk, Scott and 2 more2 hr
Jun 8, 1:39 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Clark, Cleveland, Columbia and 11 more2 hr
Jun 8, 2:19 PM CDTSevere Thunderstorm WatchSPCAshley, Bradley, Calhoun, Chicot, Columbia, Desha and 10 more7 hr
Jun 8, 3:37 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Columbia, Desha and 8 more83 min

Nearby

Mesoscale Discussions in Mississippi, 2014Mesoscale Discussions in Alabama, 2014Mesoscale Discussions in Louisiana, 2014Every mesoscale discussion in 2014

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.