Alert archive / Mississippi / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 274

June 10, 201412 counties in Alabama; 14 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Jun 10, 2014, 10:58 AM CDT for 12 counties in Alabama; 14 counties in Mississippi. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jun 10, 2014, 10:58 AM CDT (15:58 UTC)
Expired: Jun 10, 2014, 7:00 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 26 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Clarke County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jones County, MS, Lauderdale County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 66 km from the middle of the area, began a volume at 16:00 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: 40%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 10%
One or more hailstones of 2 inches or more: 10%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 10, 10:59 AM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar	38 min
Jun 10, 1:30 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Monroe, Wilcox	60 min
Jun 10, 1:57 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Monroe, Wilcox	48 min
Jun 10, 2:17 PM CDT	Severe Thunderstorm Warning	MOB	Crenshaw	37 min
Jun 10, 2:29 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Monroe, Wilcox	61 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.0 hours before the alert went out and 193 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: 2484 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 9, 8:13 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 19 more	92 min
Jun 9, 8:57 PM CDT	Severe Thunderstorm Watch	SPC	DeKalb, Jackson, Madison, Marshall	7 hr
Jun 9, 10:17 PM CDT	Mesoscale Discussion	SPC	Autauga, Blount, Calhoun, Cherokee, Chilton, Clay and 15 more	88 min
Jun 10, 10:10 AM CDT	Mesoscale Discussion	SPC	Choctaw, Clarke, Dallas, Greene, Hale, Marengo and 6 more	65 min
Jun 10, 10:34 AM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Cullman, DeKalb, Etowah, Hale and 12 more	116 min
Jun 10, 10:51 AM CDT	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Bullock, Calhoun, Chambers and 35 more	7 hr
Jun 10, 1:26 PM CDT	Mesoscale Discussion	SPC	Baldwin, Butler, Conecuh, Covington, Crenshaw, Escambia and 2 more	94 min
Jun 10, 1:57 PM CDT	Mesoscale Discussion	SPC	Calhoun, Chambers, Cherokee, Clay, Cleburne, Coosa and 11 more	93 min
Jun 10, 3:03 PM CDT	Mesoscale Discussion	SPC	Baldwin, Butler, Coffee, Conecuh, Covington, Dale and 3 more	87 min
Jun 10, 3:57 PM CDT	Mesoscale Discussion	SPC	Chambers, Randolph	63 min

Nearby

Severe Thunderstorm Watches in Mississippi, 2014 Severe Thunderstorm Watches in Alabama, 2014 Every 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.