Alert archive / Mississippi / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 338

June 16, 20174 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 16, 2017, 12:42 PM CDT for 4 states. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued: Jun 16, 2017, 12:42 PM CDT (17:42 UTC)
Expired: Jun 16, 2017, 10:42 PM CDT
In force: 10 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 89 counties

Ashley County, AR, Chicot County, AR, Crittenden County, AR, Lee County, AR, Phillips 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, Alcorn County, MS, Attala County, MS, Benton 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, Covington County, MS, DeSoto County, MS, Forrest County, MS, Franklin 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, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Marshall 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, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Fayette County, TN, Hardeman County, TN, Hardin County, TN, McNairy County, TN, Shelby County, TN, Tipton County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 166 km from the middle of the area, began a volume at 17:44 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: 10%
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: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 16, 1:33 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Tunica	42 min
Jun 16, 1:42 PM CDT	Severe Thunderstorm Warning	MEG	Crittenden, St. Francis	33 min
Jun 16, 1:48 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll	57 min
Jun 16, 2:12 PM CDT	Flash Flood Warning	MEG	Crittenden, St. Francis	3 hr
Jun 16, 3:20 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes	55 min
Jun 16, 3:50 PM CDT	Severe Thunderstorm Warning	JAN	Webster	55 min
Jun 16, 3:58 PM CDT	Severe Thunderstorm Warning	JAN	Ashley	62 min
Jun 16, 4:13 PM CDT	Severe Thunderstorm Warning	JAN	Rankin, Scott	62 min
Jun 16, 4:18 PM CDT	Severe Thunderstorm Warning	JAN	Montgomery	42 min
Jun 16, 4:25 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Leflore	50 min
Jun 16, 4:34 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Monroe	41 min
Jun 16, 4:39 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	66 min
Jun 16, 4:43 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Montgomery, Oktibbeha, Webster	62 min
Jun 16, 4:45 PM CDT	Severe Thunderstorm Warning	JAN	Chicot	45 min
Jun 16, 5:00 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale	60 min
Jun 16, 5:00 PM CDT	Flash Flood Warning	MEG	Tippah	2 hr
Jun 16, 5:03 PM CDT	Severe Thunderstorm Warning	JAN	Scott, Smith	46 min
Jun 16, 5:08 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Noxubee, Oktibbeha, Winston	52 min
Jun 16, 5:20 PM CDT	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Noxubee	55 min
Jun 16, 5:21 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Holmes, Leflore, Sunflower	39 min
Jun 16, 5:28 PM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Sunflower, Washington	62 min
Jun 16, 5:42 PM CDT	Flash Flood Warning	JAN	Kemper, Lauderdale, Neshoba, Newton	4 hr
Jun 16, 5:44 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	61 min
Jun 16, 5:53 PM CDT	Flash Flood Warning	JAN	Bolivar, Carroll, Holmes, Humphreys, Leflore, Sunflower and 1 more	3 hr
Jun 16, 5:54 PM CDT	Severe Thunderstorm Warning	JAN	Jasper, Newton	51 min
Jun 16, 5:55 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Noxubee	65 min
Jun 16, 6:00 PM CDT	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Leflore	60 min
Jun 16, 6:11 PM CDT	Severe Thunderstorm Warning	JAN	Chicot	64 min
Jun 16, 6:23 PM CDT	Severe Thunderstorm Warning	JAN	Clarke, Lauderdale	56 min
Jun 16, 6:47 PM CDT	Severe Thunderstorm Warning	JAN	Chicot	73 min
Jun 16, 7:12 PM CDT	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Issaquena, Sharkey, Yazoo	63 min
Jun 16, 7:35 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Madison, Rankin, Warren, Yazoo	55 min
Jun 16, 7:48 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Rankin	57 min
Jun 16, 7:53 PM CDT	Severe Thunderstorm Warning	JAN	Madison	67 min
Jun 16, 8:14 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Jasper, Jones, Simpson, Smith	61 min
Jun 16, 8:24 PM CDT	Severe Thunderstorm Warning	JAN	Copiah, Simpson	66 min
Jun 16, 8:51 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Simpson, Smith	54 min
Jun 16, 8:53 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Lincoln	52 min
Jun 16, 9:00 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Jefferson	49 min
Jun 16, 9:10 PM CDT	Severe Thunderstorm Warning	JAN	Jasper, Jones	65 min
Jun 16, 9:12 PM CDT	Flash Flood Warning	JAN	Jones	3 hr
Jun 16, 9:13 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar, Marion	77 min
Jun 16, 9:59 PM CDT	Flash Flood Warning	JAN	Forrest, Lamar	3 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, 5.7 hours before the alert went out and 120 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 800 J/kg
Mixed-layer CIN: -305 J/kg
Mixed-layer LCL: 1569 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 24 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 7:07 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Crawford, Sebastian, Washington	6 hr
Jun 16, 12:05 PM CDT	Mesoscale Discussion	SPC	Ashley, Chicot, Desha	2 hr
Jun 16, 3:40 PM CDT	Mesoscale Discussion	SPC	Ashley, Chicot, Desha, Phillips	2 hr
Jun 16, 6:19 PM CDT	Mesoscale Discussion	SPC	Ashley, Chicot, Desha	56 min
Jun 16, 12:45 PM CDT	Mesoscale Discussion	SPC	Crockett, Dyer, Gibson, Lake, Obion, Weakley	3 hr

Nearby

Severe Thunderstorm Watches in Mississippi, 2017 Severe Thunderstorm Watches in Louisiana, 2017 Severe Thunderstorm Watches in Tennessee, 2017 Every severe thunderstorm watch in 2017

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.