Alert archive / Mississippi / Mesoscale Discussions in 2010

Mesoscale Discussion 587

May 16, 20104 states

The Storm Prediction Center issued this mesoscale discussion at May 16, 2010, 7:43 PM CDT for 4 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: May 16, 2010, 7:43 PM CDT (00:43 UTC)
Expired: May 16, 2010, 8:45 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

All 45 counties

Ashley County, AR, Chicot County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, Union County, AR, Claiborne Parish, LA, East Carroll Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Union Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Washington County, MS, Yalobusha County, MS, Yazoo County, MS, Fayette County, TN, Haywood County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 179 km from the middle of the area, began a volume at 00:45 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 nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.7 hours before the alert went out and 171 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: 1191 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 5:05 PM CDT	Mesoscale Discussion	SPC	Arkansas, Cleveland, Crittenden, Cross, Dallas, Desha and 13 more	85 min
May 17, 1:34 PM CDT	Mesoscale Discussion	SPC	Sabine, Vernon	56 min
May 17, 11:48 AM CDT	Mesoscale Discussion	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Cannon and 41 more	57 min
May 17, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Blount, Campbell, Carter, Claiborne, Clay and 26 more	6 hr
May 17, 5:56 PM CDT	Mesoscale Discussion	SPC	Anderson, Campbell, Claiborne, Clay, Cumberland, DeKalb and 20 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2010 Mesoscale Discussions in Arkansas, 2010 Mesoscale Discussions in Louisiana, 2010 Every mesoscale discussion in 2010

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.