Alert archive / Louisiana / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 262

June 8, 201416 counties in Arkansas; 26 parishes in Louisiana; 8 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jun 8, 2014, 2:19 PM CDT for 16 counties in Arkansas; 26 parishes in Louisiana; 8 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 8, 2014, 2:19 PM CDT (19:19 UTC)
Expired
Jun 8, 2014, 9:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 50 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, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Sevier County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Bowie County, TX, Cass County, TX, Harrison County, TX, Marion County, TX, Panola County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 148 km from the middle of the area, began a volume at 19:22 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 8, 2:36 PM CDTSevere Thunderstorm WarningSHVUnion54 min
Jun 8, 3:06 PM CDTSevere Thunderstorm WarningLZKBradley, Calhoun24 min
Jun 8, 3:09 PM CDTSevere Thunderstorm WarningSHVUnion36 min
Jun 8, 3:27 PM CDTSevere Thunderstorm WarningLZKBradley, Calhoun33 min
Jun 8, 3:31 PM CDTSevere Thunderstorm WarningSHVUnion33 min
Jun 8, 3:56 PM CDTSevere Thunderstorm WarningLZKBradley, Drew20 min
Jun 8, 4:56 PM CDTSevere Thunderstorm WarningSHVColumbia, Lafayette49 min
Jun 8, 5:40 PM CDTSevere Thunderstorm WarningSHVColumbia50 min
Jun 8, 5:57 PM CDTSevere Thunderstorm WarningSHVClaiborne, Lincoln, Union63 min
Jun 8, 6:30 PM CDTSevere Thunderstorm WarningSHVUnion60 min
Jun 8, 6:39 PM CDTSevere Thunderstorm WarningSHVUnion66 min
Jun 8, 6:55 PM CDTTornado WarningSHVHempstead, Howard, Little River, Sevier49 min
Jun 8, 7:14 PM CDTTornado WarningSHVHempstead, Little River, Miller31 min
Jun 8, 7:29 PM CDTTornado WarningSHVOuachita, Union24 min
Jun 8, 7:30 PM CDTSevere Thunderstorm WarningJANMorehouse75 min
Jun 8, 7:48 PM CDTTornado WarningSHVHempstead, Little River, Miller57 min
Jun 8, 8:24 PM CDTTornado WarningSHVMiller36 min
Jun 8, 8:26 PM CDTSevere Thunderstorm WarningJANMorehouse, West Carroll64 min
Jun 8, 9:00 PM CDTSevere Thunderstorm WarningSHVLafayette, Miller60 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 7.3 hours before the alert went out and 139 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

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, 3:37 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Columbia, Desha and 8 more83 min
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

Severe Thunderstorm Watches in Louisiana, 2014Severe Thunderstorm Watches in Arkansas, 2014Severe Thunderstorm Watches in Texas, 2014Every severe thunderstorm watch 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.