Alert archive / Mississippi / Mesoscale Discussions in 2006

Mesoscale Discussion 807

May 9, 200628 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 1:33 PM CDT for 28 counties in Mississippi. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: May 9, 2006, 1:33 PM CDT (18:33 UTC)
Expired: May 9, 2006, 3:00 PM CDT
In force: 87 min
Issued by: the Storm Prediction Center

All 28 counties

Alcorn County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Leflore County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Webster County, MS, Yalobusha County, MS

The radar

The Columbus AFB radar (KGWX), 99 km from the middle of the area, began a volume at 18:35 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

Little Rock, AR (KLZK), launched 12:00Z, 6.6 hours before the alert went out and 106 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: 1109 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 657 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.8

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 8, 7:42 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Clarke, Copiah, Covington and 30 more	93 min
May 8, 7:56 PM CDT	Severe Thunderstorm Watch	SPC	Amite, George, Greene, Harrison, Jackson, Pearl River and 6 more	5 hr
May 9, 9:47 AM CDT	Mesoscale Discussion	SPC	Covington, Forrest, George, Greene, Hancock, Harrison and 14 more	118 min
May 9, 10:26 AM CDT	Severe Thunderstorm Watch	SPC	Clarke, Copiah, Covington, Forrest, George, Greene and 15 more	7 hr
May 9, 12:29 PM CDT	Severe Thunderstorm Watch	SPC	Attala, Carroll, Choctaw, Clarke, Clay, Covington and 22 more	8 hr
May 9, 3:57 PM CDT	Mesoscale Discussion	SPC	Clarke, Clay, Kemper, Lauderdale, Lowndes, Monroe and 3 more	2 hr
May 9, 4:47 PM CDT	Severe Thunderstorm Watch	SPC	Greene, Perry, Wayne	5 hr
May 9, 6:33 PM CDT	Mesoscale Discussion	SPC	Clarke, Covington, Greene, Jasper, Jefferson Davis, Jones and 12 more	57 min

Nearby

Mesoscale Discussions in Mississippi, 2006 Every mesoscale discussion in 2006

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.