Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 836

May 10, 200626 parishes in Louisiana; 4 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 10, 2006, 6:05 PM CDT for 26 parishes in Louisiana; 4 counties in Mississippi. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued: May 10, 2006, 6:05 PM CDT (23:05 UTC)
Expired: May 10, 2006, 7:30 PM CDT
In force: 85 min
Issued by: the Storm Prediction Center

All 30 counties

Acadia Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

The radar

The Lake Charles radar (KLCH), 136 km from the middle of the area, began a volume at 23:08 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.1 hours before the alert went out and 135 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: 3074 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 591 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 9.0

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
May 10, 10:57 AM CDT	Mesoscale Discussion	SPC	Caldwell, Catahoula, Claiborne, East Carroll, Franklin, Jackson and 9 more	2 hr
May 10, 12:03 PM CDT	Tornado Watch	SPC	Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more	9 hr
May 10, 12:50 PM CDT	Mesoscale Discussion	SPC	Bienville, De Soto, Grant, Jackson, Natchitoches, Red River and 2 more	115 min
May 10, 1:13 PM CDT	Tornado Watch	SPC	Allen, Avoyelles, Beauregard, Bienville, Bossier, Caddo and 17 more	8 hr
May 10, 2:42 PM CDT	Mesoscale Discussion	SPC	Caldwell, Catahoula, East Carroll, Franklin, Jackson, LaSalle and 6 more	2 hr
May 9, 9:54 PM CDT	Mesoscale Discussion	SPC	George, Greene	2 hr
May 10, 12:41 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Bolivar, Carroll, Coahoma, DeSoto, Grenada and 13 more	7 hr
May 10, 2:05 AM CDT	Mesoscale Discussion	SPC	Alcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 10 more	55 min
May 10, 2:24 AM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Attala, Calhoun, Chickasaw, Choctaw, Clay and 17 more	5 hr
May 10, 4:01 AM CDT	Mesoscale Discussion	SPC	Attala, Chickasaw, Choctaw, Clay, Holmes, Kemper and 10 more	89 min
May 10, 5:47 AM CDT	Mesoscale Discussion	SPC	Kemper, Lauderdale, Noxubee	88 min
May 10, 6:27 AM CDT	Mesoscale Discussion	SPC	Bolivar, Coahoma, DeSoto, Leflore, Panola, Quitman and 5 more	93 min
May 10, 8:31 AM CDT	Mesoscale Discussion	SPC	Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clay and 18 more	89 min
May 10, 9:48 AM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 20 more	5 hr
May 10, 11:09 AM CDT	Severe Thunderstorm Watch	SPC	Bolivar, Coahoma, Humphreys, Leflore, Quitman, Sharkey and 3 more	3 hr
May 10, 1:45 PM CDT	Tornado Watch	SPC	George, Greene, Perry, Stone, Wayne	7 hr

Nearby

Mesoscale Discussions in Louisiana, 2006 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.