Alert archive / Mississippi / Tornado Watches in 2013

Tornado Watch 141

April 27, 201311 counties in Arkansas; 22 counties in Mississippi; 11 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Apr 27, 2013, 3:47 PM CDT for 11 counties in Arkansas; 22 counties in Mississippi; 11 counties in Tennessee. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Apr 27, 2013, 3:47 PM CDT (20:47 UTC)
Expired
Apr 28, 2013, 2:02 AM CDT
In force
10 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 44 counties

Arkansas County, AR, Crittenden County, AR, Cross County, AR, Jefferson County, AR, Lee County, AR, Lonoke County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Coahoma County, MS, DeSoto County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe 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, Tunica County, MS, Union County, MS, Yalobusha County, MS, Chester County, TN, Decatur County, TN, Fayette County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Madison County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 30 km from the middle of the area, began a volume at 20:49 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 27, 4:04 PM CDTSevere Thunderstorm WarningMEGItawamba, Prentiss, Tishomingo26 min
Apr 27, 4:25 PM CDTSevere Thunderstorm WarningMEGTishomingo35 min
Apr 27, 4:39 PM CDTSevere Thunderstorm WarningLZKLonoke, Pulaski36 min
Apr 27, 4:48 PM CDTSevere Thunderstorm WarningMEGItawamba, Monroe42 min
Apr 27, 5:14 PM CDTSevere Thunderstorm WarningMEGFayette, Hardeman46 min
Apr 27, 5:56 PM CDTSevere Thunderstorm WarningLZKMonroe, Prairie49 min
Apr 27, 6:38 PM CDTSevere Thunderstorm WarningMEGPhillips67 min
Apr 27, 6:45 PM CDTSevere Thunderstorm WarningLZKArkansas, Monroe30 min
Apr 27, 6:57 PM CDTSevere Thunderstorm WarningLZKCleveland, Jefferson, Lincoln33 min
Apr 27, 7:15 PM CDTSevere Thunderstorm WarningMEGCross, Poinsett45 min
Apr 27, 7:19 PM CDTSevere Thunderstorm WarningLZKArkansas, Jefferson, Lincoln26 min
Apr 27, 7:35 PM CDTSevere Thunderstorm WarningMEGCrittenden, Mississippi, Poinsett40 min
Apr 27, 7:38 PM CDTTornado WarningMEGPhillips37 min
Apr 27, 7:40 PM CDTSevere Thunderstorm WarningMEGPhillips65 min
Apr 27, 7:43 PM CDTSevere Thunderstorm WarningLZKArkansas, Jefferson, Lincoln47 min
Apr 27, 8:15 PM CDTTornado WarningMEGPhillips30 min
Apr 27, 8:31 PM CDTSevere Thunderstorm WarningMEGCoahoma, Quitman59 min
Apr 27, 9:19 PM CDTTornado WarningMEGFayette, Haywood, Tipton41 min
Apr 27, 9:23 PM CDTSevere Thunderstorm WarningMEGCoahoma, Panola, Quitman, Tallahatchie52 min
Apr 27, 9:35 PM CDTSevere Thunderstorm WarningMEGChester, Hardeman, Haywood, Madison55 min
Apr 27, 9:47 PM CDTTornado WarningMEGFayette, Hardeman, Haywood, Madison43 min
Apr 27, 9:54 PM CDTSevere Thunderstorm WarningMEGLafayette, Panola, Tallahatchie, Yalobusha51 min
Apr 27, 10:20 PM CDTTornado WarningMEGChester, Hardeman25 min
Apr 27, 10:27 PM CDTSevere Thunderstorm WarningMEGChester, Henderson, Madison48 min
Apr 27, 10:29 PM CDTSevere Thunderstorm WarningMEGCalhoun, Chickasaw, Lafayette, Pontotoc, Yalobusha46 min
Apr 27, 10:40 PM CDTSevere Thunderstorm WarningMEGChester, Hardeman, Henderson, McNairy50 min
Apr 27, 11:08 PM CDTFlash Flood WarningMEGCalhoun, Lafayette, Panola, Yalobusha3 hr
Apr 27, 11:08 PM CDTSevere Thunderstorm WarningMEGCalhoun, Chickasaw, Lafayette, Pontotoc67 min
Apr 27, 11:19 PM CDTFlash Flood WarningMEGDecatur3 hr
Apr 27, 11:29 PM CDTSevere Thunderstorm WarningMEGChester, Decatur, Hardin, Henderson, McNairy61 min
Apr 27, 11:50 PM CDTSevere Thunderstorm WarningMEGCalhoun, Chickasaw40 min
Apr 28, 12:08 AM CDTSevere Thunderstorm WarningMEGChickasaw, Itawamba, Lee, Monroe, Pontotoc67 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

Little Rock, AR (KLZK), launched 12:00Z, 8.8 hours before the alert went out and 35 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 2013-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 2013-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
429 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
159 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
Apr 27, 12:57 AM CDTMesoscale DiscussionSPCHoward, Polk, Scott, Sebastian, Sevier2 hr
Apr 27, 2:50 AM CDTMesoscale DiscussionSPCPolk, Scott25 min
Apr 27, 1:55 PM CDTMesoscale DiscussionSPCArkansas, Chicot, Crittenden, Cross, Desha, Drew and 10 more2 hr
Apr 27, 6:54 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Cleveland, Drew, Lincoln, Union66 min
Apr 27, 4:54 PM CDTMesoscale DiscussionSPCItawamba, Lee, Monroe, Prentiss, Tishomingo66 min

Nearby

Tornado Watches in Mississippi, 2013Tornado Watches in Arkansas, 2013Tornado Watches in Tennessee, 2013Every tornado watch 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.