Alert archive / Mississippi / Mesoscale Discussions in 2010

Mesoscale Discussion 2002

October 26, 20105 parishes in Louisiana; 26 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2010, 10:05 AM CDT for 5 parishes in Louisiana; 26 counties in Mississippi. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Oct 26, 2010, 10:05 AM CDT (15:05 UTC)
Expired: Oct 26, 2010, 12:00 PM CDT
In force: 115 min
Issued by: the Storm Prediction Center

All 31 counties

East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Attala County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Copiah County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leake County, MS, Leflore County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 66 km from the middle of the area, began a volume at 15:06 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 725Oct 26, 11:40 AM CDT

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 3.1 hours before the alert went out and 226 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 732 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: -172 m²/s²
0-3 km storm-relative helicity: 42 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
Oct 26, 3:38 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, DeSoto, Marshall, Tate, Tippah and 2 more	2 hr
Oct 26, 4:05 AM CDT	Tornado Watch	SPC	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more	8 hr
Oct 26, 6:00 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Coahoma, DeSoto, Itawamba, Lafayette and 11 more	2 hr
Oct 26, 8:54 AM CDT	Mesoscale Discussion	SPC	Itawamba, Monroe, Tishomingo	66 min
Oct 26, 11:26 AM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 24 more	64 min
Oct 26, 11:42 AM CDT	Tornado Watch	SPC	Alcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 35 more	7 hr
Oct 26, 3:12 PM CDT	Mesoscale Discussion	SPC	Attala, Choctaw, Claiborne, Clay, Copiah, Hinds and 14 more	93 min
Oct 26, 6:32 PM CDT	Mesoscale Discussion	SPC	Lowndes	58 min

Nearby

Mesoscale Discussions in Mississippi, 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.