Alert archive / Louisiana / Mesoscale Discussions in 2014

Mesoscale Discussion 906

June 8, 201414 counties in Arkansas; 21 parishes in Louisiana; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2014, 3:37 PM CDT for 14 counties in Arkansas; 21 parishes in Louisiana; 5 counties in Texas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jun 8, 2014, 3:37 PM CDT (20:37 UTC)
Expired
Jun 8, 2014, 5:00 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 40 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Columbia County, AR, Desha County, AR, Drew County, AR, Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Cass County, TX, Harrison County, TX, Marion County, TX, Panola County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 72 km from the middle of the area, began a volume at 20:38 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

Shreveport, LA (KBAD), launched 12:00Z, 8.6 hours before the alert went out and 64 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, Shreveport, LA at 12:00Z on 2014-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2072 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, Shreveport, LA at 12:00Z on 2014-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
2072 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
-59 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.7

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, 9:55 PM CDTMesoscale DiscussionSPCHoward, Little River, Montgomery, Pike, Polk, Scott and 2 more2 hr
Jun 8, 11:24 AM CDTMesoscale DiscussionSPCAshley, Chicot, Columbia, Union66 min
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 7, 7:06 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Foard, Hardeman, Montague and 2 more2 hr
Jun 7, 8:14 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Cooke, Fannin, Foard and 6 more8 hr
Jun 7, 9:50 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Castro, Childress, Cochran and 22 more85 min
Jun 7, 11:43 PM CDTMesoscale DiscussionSPCAndrews, Borden, Dawson, Gaines, Howard, Martin and 2 more92 min
Jun 8, 2:02 AM CDTMesoscale DiscussionSPCAndrews, Archer, Baylor, Borden, Callahan, Clay and 33 more118 min
Jun 8, 10:32 AM CDTMesoscale DiscussionSPCBorden, Coke, Crosby, Dawson, Fisher, Gaines and 16 more118 min
Jun 8, 2:37 PM CDTMesoscale DiscussionSPCDallam53 min
Jun 8, 2:43 PM CDTMesoscale DiscussionSPCAndrews, Coke, Concho, Crane, Crockett, Ector and 27 more3 hr
Jun 8, 2:55 PM CDTTornado WatchSPCDallam, Deaf Smith, Hartley, Oldham8 hr
Jun 8, 5:09 PM CDTTornado WatchSPCAndrews, Brewster, Cochran, Crane, Culberson, Dawson and 15 more8 hr
Jun 8, 5:25 PM CDTMesoscale DiscussionSPCDallam, Hartley, Sherman2 hr
Jun 8, 6:34 PM CDTMesoscale DiscussionSPCBosque, Brewster, Concho, Coryell, Crockett, Hamilton and 14 more86 min

Nearby

Mesoscale Discussions in Louisiana, 2014Mesoscale Discussions in Arkansas, 2014Mesoscale Discussions in Texas, 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.