Alert archive / Mississippi / Mesoscale Discussions in 2016

Mesoscale Discussion 300

March 31, 2016Washington County, Alabama; 9 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2016, 7:47 AM CDT for Washington County, Alabama; 9 counties in Mississippi. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Mar 31, 2016, 7:47 AM CDT (12:47 UTC)
Expired: Mar 31, 2016, 8:45 AM CDT
In force: 58 min
Issued by: the Storm Prediction Center

Counties Washington County, AL, Covington County, MS, Forrest County, MS, Greene County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Marion County, MS, Perry County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 105 km from the middle of the area, began a volume at 12:46 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 67Mar 31, 8:45 AM CDT

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.8 hours before the alert went out and 141 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: 596 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 466 m²/s²
0-3 km storm-relative helicity: 554 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 8.6

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 31, 8:37 AM CDT	Mesoscale Discussion	SPC	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more	53 min
Mar 31, 8:43 AM CDT	Tornado Watch	SPC	Baldwin, Clarke, Conecuh, Covington, Escambia, Mobile and 2 more	5 hr
Mar 31, 11:29 AM CDT	Mesoscale Discussion	SPC	Baldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 5 more	2 hr
Mar 31, 1:32 PM CDT	Mesoscale Discussion	SPC	Baldwin, Covington, Escambia, Geneva	58 min
Mar 31, 4:47 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Chilton, Choctaw, Clarke, Colbert and 19 more	58 min
Mar 31, 5:58 PM CDT	Tornado Watch	SPC	Autauga, Bibb, Blount, Chilton, Choctaw, Clarke and 33 more	7 hr
Mar 31, 6:52 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Choctaw, Colbert, Cullman, Dallas and 22 more	53 min
Mar 30, 8:39 PM CDT	Mesoscale Discussion	SPC	Bolivar, Issaquena, Sharkey, Washington	96 min
Mar 30, 10:00 PM CDT	Tornado Watch	SPC	Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 18 more	6 hr
Mar 30, 11:30 PM CDT	Mesoscale Discussion	SPC	Adams, Bolivar, Claiborne, Humphreys, Issaquena, Jefferson and 4 more	60 min
Mar 31, 3:04 AM CDT	Mesoscale Discussion	SPC	Amite, Clarke, Copiah, Covington, Forrest, Franklin and 19 more	86 min
Mar 31, 3:20 AM CDT	Tornado Watch	SPC	Amite, Covington, Forrest, Jasper, Jefferson Davis, Jones and 10 more	6 hr
Mar 31, 10:26 AM CDT	Mesoscale Discussion	SPC	Coahoma, DeSoto, Tate, Tunica	3 hr
Mar 31, 1:30 PM CDT	Mesoscale Discussion	SPC	Adams, Attala, Bolivar, Calhoun, Carroll, Chickasaw and 30 more	2 hr
Mar 31, 2:35 PM CDT	Tornado Watch	SPC	Adams, Alcorn, Attala, Benton, Bolivar, Calhoun and 60 more	7 hr
Mar 31, 3:30 PM CDT	Mesoscale Discussion	SPC	Amite, Covington, Forrest, Franklin, George, Greene and 13 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2016 Mesoscale Discussions in Alabama, 2016 Every mesoscale discussion in 2016

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.