Alert archive / Mississippi / Mesoscale Discussions in 2009

Mesoscale Discussion 1113

June 14, 2009Ashley County, Chicot County, Arkansas; East Carroll Parish, Morehouse Parish, West Carroll Parish, Louisiana; 16 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 14, 2009, 12:07 PM CDT for Ashley County, Chicot County, Arkansas; East Carroll Parish, Morehouse Parish, West Carroll Parish, Louisiana; 16 counties in Mississippi. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 14, 2009, 12:07 PM CDT (17:07 UTC)
Expired: Jun 14, 2009, 1:30 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center

All 21 counties

Ashley County, AR, Chicot County, AR, East Carroll Parish, LA, Morehouse Parish, LA, West Carroll Parish, LA, Attala County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Washington County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 94 km from the middle of the area, began a volume at 17:07 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, 5.1 hours before the alert went out and 216 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: 183 J/kg
Mixed-layer CIN: -203 J/kg
Mixed-layer LCL: 2293 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 239 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 13, 10:33 PM CDT	Mesoscale Discussion	SPC	Crawford, Howard, Polk, Scott, Sebastian	57 min
Jun 14, 1:51 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Calhoun, Carroll, Clark and 40 more	4 hr
Jun 14, 5:26 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Calhoun, Clark, Cleburne, Cleveland and 33 more	94 min
Jun 13, 8:14 PM CDT	Mesoscale Discussion	SPC	Attala, Carroll, Holmes, Humphreys, Leake, Leflore and 3 more	61 min
Jun 14, 8:38 AM CDT	Mesoscale Discussion	SPC	Alcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 11 more	97 min
Jun 14, 8:50 AM CDT	Severe Thunderstorm Watch	SPC	Calhoun, Chickasaw, Choctaw, Clay, Itawamba, Lee and 8 more	6 hr
Jun 14, 10:45 AM CDT	Mesoscale Discussion	SPC	Chickasaw, Clay, Itawamba, Lee, Lowndes, Monroe and 4 more	90 min

Nearby

Mesoscale Discussions in Mississippi, 2009 Mesoscale Discussions in Louisiana, 2009 Mesoscale Discussions in Arkansas, 2009 Every mesoscale discussion in 2009

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.