Alert archive / Arkansas / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 406

July 8, 201434 counties in Arkansas; 17 counties in Mississippi; 12 counties in Tennessee

The Storm Prediction Center issued this severe thunderstorm watch at Jul 8, 2014, 5:56 PM CDT for 34 counties in Arkansas; 17 counties in Mississippi; 12 counties in Tennessee. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 8, 2014, 5:56 PM CDT (22:56 UTC)
Expired
Jul 8, 2014, 11:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 63 counties

Arkansas County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Johnson County, AR, Lee County, AR, Logan County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, St. Francis County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Alcorn County, MS, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Chester County, TN, Decatur County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN

The radar

The Little Rock radar (KLZK), 34 km from the middle of the area, began a volume at 22:58 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
5%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 8, 6:00 PM CDTSevere Thunderstorm WarningLZKNewton, Pope, Searcy, Van Buren30 min
Jul 8, 6:08 PM CDTSevere Thunderstorm WarningLZKYell37 min
Jul 8, 6:18 PM CDTSevere Thunderstorm WarningLZKJohnson, Newton25 min
Jul 8, 6:23 PM CDTSevere Thunderstorm WarningMEGChester, Hardeman, Madison52 min
Jul 8, 6:25 PM CDTSevere Thunderstorm WarningLZKConway, Pope, Van Buren35 min
Jul 8, 6:33 PM CDTSevere Thunderstorm WarningLZKConway, Perry, Pope, Yell42 min
Jul 8, 6:45 PM CDTSevere Thunderstorm WarningLZKWoodruff30 min
Jul 8, 6:46 PM CDTFlash Flood WarningMEGChester, Madison119 min
Jul 8, 6:49 PM CDTSevere Thunderstorm WarningLZKConway, Perry, Saline, Yell41 min
Jul 8, 7:11 PM CDTFlash Flood WarningLZKConway, Faulkner, Perry, Pope, Van Buren, Yell109 min
Jul 8, 7:13 PM CDTSevere Thunderstorm WarningLZKConway, Perry, Yell47 min
Jul 8, 7:20 PM CDTSevere Thunderstorm WarningLZKFaulkner, Perry, Pulaski, White25 min
Jul 8, 7:50 PM CDTSevere Thunderstorm WarningLZKWhite25 min
Jul 8, 8:00 PM CDTSevere Thunderstorm WarningLZKGarland, Montgomery, Perry, Yell30 min
Jul 8, 8:14 PM CDTSevere Thunderstorm WarningLZKWoodruff31 min
Jul 8, 8:43 PM CDTSevere Thunderstorm WarningMEGCrittenden34 min
Jul 8, 9:38 PM CDTFlash Flood WarningMEGChester, Hardeman, McNairy3 hr
Jul 8, 9:40 PM CDTFlash Flood WarningMEGCross3 hr
Jul 8, 10:48 PM CDTFlash Flood WarningLZKPolk, Scott3 hr

Discussions around it

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

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 10.9 hours before the alert went out and 186 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 12:00Z on 2014-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1296 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 12:00Z on 2014-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1296 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1067 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 5:15 PM CDTMesoscale DiscussionSPCCleburne, Conway, Craighead, Crawford, Cross, Faulkner and 26 more60 min
Jul 8, 3:02 PM CDTMesoscale DiscussionSPCAnderson, Bedford, Bledsoe, Blount, Campbell, Cannon and 35 more88 min

Nearby

Severe Thunderstorm Watches in Arkansas, 2014Severe Thunderstorm Watches in Mississippi, 2014Severe Thunderstorm Watches in Tennessee, 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.