Alert archive / Mississippi / Mesoscale Discussions in 2005

Mesoscale Discussion 2274

September 24, 200536 counties in Arkansas; 8 parishes in Louisiana; 37 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Sep 24, 2005, 11:31 PM CDT for 36 counties in Arkansas; 8 parishes in Louisiana; 37 counties in Mississippi. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Sep 24, 2005, 11:31 PM CDT (04:31 UTC)
Expired: Sep 25, 2005, 1:00 AM CDT
In force: 89 min
Issued by: the Storm Prediction Center

All 81 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Chicot County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Grant County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Marion County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, DeSoto County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Montgomery County, MS, Panola County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 158 km from the middle of the area, began a volume at 04:34 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, 4.5 hours before the alert went out and 149 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: 947 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.3

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
Sep 24, 8:55 PM CDT	Tornado Watch	SPC	Arkansas, Ashley, Baxter, Boone, Bradley, Chicot and 34 more	7 hr
Sep 25, 3:07 AM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Baxter, Boone, Bradley, Chicot and 34 more	53 min
Sep 25, 3:40 AM CDT	Tornado Watch	SPC	Arkansas, Chicot, Clay, Craighead, Crittenden, Cross and 15 more	9 hr
Sep 25, 9:32 AM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Greene, Lawrence, Mississippi and 3 more	88 min
Sep 25, 11:05 AM CDT	Tornado Watch	SPC	Alcorn, Itawamba, Lee, Monroe, Prentiss, Tishomingo	8 hr
Sep 25, 12:30 PM CDT	Tornado Watch	SPC	Attala, Choctaw, Claiborne, Clarke, Copiah, Covington and 26 more	6 hr
Sep 25, 1:21 PM CDT	Mesoscale Discussion	SPC	Adams, Attala, Choctaw, Clarke, Clay, Copiah and 33 more	114 min
Sep 25, 3:41 PM CDT	Mesoscale Discussion	SPC	Adams, Attala, Choctaw, Clarke, Clay, Copiah and 33 more	94 min
Sep 25, 6:05 PM CDT	Mesoscale Discussion	SPC	Clarke, Clay, Jasper, Kemper, Lauderdale, Leake and 11 more	55 min
Sep 25, 6:50 PM CDT	Tornado Watch	SPC	Attala, Choctaw, Clarke, Clay, Itawamba, Jasper and 15 more	6 hr

Nearby

Mesoscale Discussions in Mississippi, 2005 Mesoscale Discussions in Arkansas, 2005 Mesoscale Discussions in Louisiana, 2005 Every mesoscale discussion in 2005

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.