Alert archive / Mississippi / Tornado Watches in 2020

Tornado Watch 106

April 12, 20205 counties in Arkansas; 9 parishes in Louisiana; 53 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Apr 12, 2020, 10:41 AM CDT for 5 counties in Arkansas; 9 parishes in Louisiana; 53 counties in Mississippi. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Apr 12, 2020, 10:41 AM CDT (15:41 UTC)
Expired
Apr 12, 2020, 9:00 PM CDT
In force
10 hr
Issued by
the Storm Prediction Center
Particularly dangerous situation
Yes
Largest hail expected
2 in
Strongest gust expected
70 kt
All 67 counties

Ashley County, AR, Bradley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Coahoma County, MS, Copiah County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Jasper County, MS, Jefferson County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tishomingo County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 112 km from the middle of the area, began a volume at 15:44 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
90%
One or more EF2 to EF5 tornadoes
80%
Ten or more severe wind reports
90%
One or more gusts of 65 knots or more
50%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 12, 10:50 AM CDTSevere Thunderstorm WarningJANLowndes, Noxubee29 min
Apr 12, 11:34 AM CDTSevere Thunderstorm WarningJANAshley56 min
Apr 12, 11:38 AM CDTSevere Thunderstorm WarningJANMorehouse, West Carroll67 min
Apr 12, 11:42 AM CDTTornado Warning Tornado observedJANMorehouse, Richland, West Carroll51 min
Apr 12, 11:51 AM CDTSevere Thunderstorm WarningJANFranklin, Richland39 min
Apr 12, 12:16 PM CDTTornado Warning Tornado observedJANEast Carroll59 min
Apr 12, 12:21 PM CDTSevere Thunderstorm WarningJANMadison54 min
Apr 12, 12:26 PM CDTSevere Thunderstorm WarningJANAshley, Chicot37 min
Apr 12, 12:35 PM CDTSevere Thunderstorm WarningJANAttala, Holmes, Leake, Madison, Yazoo40 min
Apr 12, 1:05 PM CDTTornado WarningJANHumphreys, Yazoo55 min
Apr 12, 1:06 PM CDTSevere Thunderstorm WarningJANLeake, Madison, Neshoba, Scott, Winston39 min
Apr 12, 1:40 PM CDTTornado WarningJANAttala, Holmes65 min
Apr 12, 2:27 PM CDTSevere Thunderstorm WarningJANAttala, Choctaw, Winston48 min
Apr 12, 2:28 PM CDTFlash Flood WarningMEGPanola, Tate3 hr
Apr 12, 2:51 PM CDTTornado Warning Tornado observedJANChoctaw, Noxubee, Oktibbeha, Winston54 min
Apr 12, 2:54 PM CDTSevere Thunderstorm WarningJANLeake, Madison54 min
Apr 12, 2:58 PM CDTTornado WarningJANWinston26 min
Apr 12, 3:04 PM CDTSevere Thunderstorm WarningJANHinds, Madison, Rankin41 min
Apr 12, 3:07 PM CDTSevere Thunderstorm WarningMEGChickasaw, Itawamba, Lee, Monroe23 min
Apr 12, 3:14 PM CDTTornado WarningJANNoxubee45 min
Apr 12, 3:17 PM CDTSevere Thunderstorm WarningJANClay, Lowndes, Oktibbeha43 min
Apr 12, 3:27 PM CDTSevere Thunderstorm WarningJANHolmes, Humphreys, Yazoo20 min
Apr 12, 3:28 PM CDTSevere Thunderstorm WarningMEGItawamba, Lee, Monroe15 min
Apr 12, 3:29 PM CDTTornado WarningJANLowndes31 min
Apr 12, 3:45 PM CDTFlash Flood WarningJANAttala, Choctaw, Leake, Neshoba, Noxubee, Winston4 hr
Apr 12, 4:10 PM CDTSevere Thunderstorm WarningJANNoxubee35 min
Apr 12, 4:11 PM CDTSevere Thunderstorm WarningJANCatahoula, Franklin50 min
Apr 12, 4:25 PM CDTSevere Thunderstorm WarningJANRankin, Scott, Simpson, Smith50 min
Apr 12, 4:28 PM CDTTornado Warning EmergencyTornado observedCatastrophic damage threatJANJasper, Jones62 min
Apr 12, 4:49 PM CDTSevere Thunderstorm WarningJANEast Carroll, Franklin, Madison, Richland, Tensas, West Carroll41 min
Apr 12, 5:01 PM CDTTornado Warning EmergencyTornado observedCatastrophic damage threatJANCovington, Jasper, Jones, Smith59 min
Apr 12, 5:04 PM CDTSevere Thunderstorm WarningJANLeake, Neshoba, Winston29 min
Apr 12, 5:06 PM CDTTornado WarningJANLowndes, Noxubee, Oktibbeha, Winston38 min
Apr 12, 5:06 PM CDTTornado Warning EmergencyTornado observedCatastrophic damage threatJANClarke, Jasper31 min
Apr 12, 5:19 PM CDTSevere Thunderstorm WarningJANHumphreys, Issaquena, Sharkey, Sunflower, Washington41 min
Apr 12, 5:21 PM CDTSevere Thunderstorm WarningJANMadison39 min
Apr 12, 5:40 PM CDTFlash Flood Warning Considerable damage threatJANChoctaw, Clay, Lowndes, Oktibbeha, Webster, Winston4 hr
Apr 12, 5:44 PM CDTTornado WarningJANClarke, Jasper35 min
Apr 12, 5:45 PM CDTTornado Warning Tornado observedJANKemper, Lauderdale31 min
Apr 12, 5:56 PM CDTSevere Thunderstorm WarningJANAttala, Holmes, Madison, Yazoo44 min
Apr 12, 5:58 PM CDTSevere Thunderstorm WarningJANCarroll, Holmes, Humphreys, Leflore47 min
Apr 12, 6:00 PM CDTSevere Thunderstorm WarningJANSmith17 min
Apr 12, 6:17 PM CDTSevere Thunderstorm WarningJANSimpson, Smith43 min
Apr 12, 6:21 PM CDTFlash Flood WarningJANLauderdale114 min
Apr 12, 6:39 PM CDTSevere Thunderstorm WarningJANAttala, Carroll, Choctaw, Grenada, Montgomery, Webster51 min
Apr 12, 6:55 PM CDTSevere Thunderstorm WarningJANKemper, Lauderdale65 min
Apr 12, 7:13 PM CDTTornado WarningJANKemper21 min
Apr 12, 7:18 PM CDTSevere Thunderstorm WarningLZKBradley, Calhoun, Ouachita42 min
Apr 12, 7:56 PM CDTSevere Thunderstorm WarningLZKBradley, Calhoun, Drew49 min
Apr 12, 7:57 PM CDTFlash Flood WarningJANKemper, Lauderdale, Neshoba, Newton3 hr
Apr 12, 8:08 PM CDTSevere Thunderstorm WarningJANAshley67 min
Apr 12, 8:14 PM CDTSevere Thunderstorm WarningJANMorehouse61 min
Apr 12, 8:28 PM CDTSevere Thunderstorm WarningLZKArkansas, Bradley, Cleveland, Desha, Drew, Jefferson and 5 more62 min
Apr 12, 8:43 PM CDTSevere Thunderstorm WarningLZKDesha, Drew36 min
Apr 12, 8:44 PM CDTSevere Thunderstorm WarningJANChicot76 min
Apr 12, 8:46 PM CDTSevere Thunderstorm WarningJANBolivar74 min
Apr 12, 8:51 PM CDTSevere Thunderstorm WarningMEGCoahoma54 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

Jackson, MS (KJAN), launched 12:00Z, 3.7 hours before the alert went out and 104 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 2020-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 323 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 2020-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 379 square meters per square second.1939587897117Sfc1 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
323 J/kg
Mixed-layer CIN
-279 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
379 m²/s²
0-3 km storm-relative helicity
562 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 5:52 AM CDTTornado WatchSPCUnion8 hr
Apr 12, 10:24 AM CDTMesoscale DiscussionSPCAshley, Chicot96 min
Apr 12, 2:51 PM CDTSevere Thunderstorm WatchSPCLittle River, Miller, Sevier5 hr
Apr 12, 4:44 PM CDTMesoscale DiscussionSPCBenton, Boone, Bradley, Calhoun, Carroll, Clark and 39 more2 hr
Apr 12, 5:59 PM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 47 more4 hr
Apr 12, 6:14 PM CDTMesoscale DiscussionSPCBoone, Calhoun, Carroll, Clark, Columbia, Conway and 29 more91 min
Apr 12, 7:18 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 13 more87 min
Apr 12, 9:30 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more90 min
Apr 12, 12:03 PM CDTMesoscale DiscussionSPCEast Carroll, Franklin, Madison, Morehouse, Richland, West Carroll87 min
Apr 12, 1:02 PM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 12 more118 min
Apr 12, 1:24 PM CDTTornado WatchSPCAcadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia and 16 more9 hr
Apr 12, 5:27 PM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 6 more63 min
Apr 12, 5:44 PM CDTMesoscale DiscussionSPCMadison, Tensas91 min
Apr 12, 1:40 PM CDTMesoscale DiscussionSPCAttala, Choctaw, Hinds, Holmes, Kemper, Lauderdale and 10 more95 min
Apr 12, 3:38 PM CDTMesoscale DiscussionSPCCopiah, Covington, Jasper, Jefferson Davis, Kemper, Lauderdale and 14 more97 min
Apr 12, 3:52 PM CDTMesoscale DiscussionSPCCovington, Jefferson Davis, Jones, Marion23 min
Apr 12, 3:53 PM CDTMesoscale DiscussionSPCGreene, Perry, Wayne97 min
Apr 12, 4:26 PM CDTMesoscale DiscussionSPCCovington, Jasper, Jones34 min
Apr 12, 4:38 PM CDTTornado Watch PDSSPCGeorge, Greene, Perry, Stone, Wayne7 hr
Apr 12, 4:54 PM CDTMesoscale DiscussionSPCClarke, Covington, Jasper, Jefferson Davis, Jones, Wayne66 min

Nearby

Tornado Watches in Mississippi, 2020Tornado Watches in Louisiana, 2020Tornado Watches in Arkansas, 2020Every tornado watch in 2020

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.