Alert archive / Louisiana / Mesoscale Discussions in 2004

Mesoscale Discussion 1016

May 31, 20045 states

The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 9:21 AM CDT for 5 states. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: May 31, 2004, 9:21 AM CDT (14:21 UTC)
Expired: May 31, 2004, 10:15 AM CDT
In force: 54 min
Issued by: the Storm Prediction Center

All 76 counties

Baldwin County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile County, AL, Monroe County, AL, Pike County, AL, Washington County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Crisp County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Lee County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA, Thomas County, GA, Worth County, GA, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 53 km from the middle of the area, began a volume at 14:22 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 353May 31, 10:00 AM CDT

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.4 hours before the alert went out and 114 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: 1274 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 701 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

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 30, 8:54 PM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Lamar, Lauderdale, Lawrence, Limestone and 2 more	66 min
May 30, 9:15 PM CDT	Tornado Watch	SPC	Blount, Colbert, Cullman, DeKalb, Etowah, Fayette and 13 more	7 hr
May 30, 11:05 PM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 4 more	55 min
May 31, 12:40 AM CDT	Tornado Watch	SPC	Cherokee	5 hr
May 31, 1:06 AM CDT	Mesoscale Discussion	SPC	Blount, Cullman, DeKalb, Etowah, Fayette, Franklin and 11 more	84 min
May 31, 3:40 AM CDT	Mesoscale Discussion	SPC	Cherokee	95 min
May 31, 3:45 AM CDT	Tornado Watch	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Clay and 17 more	5 hr
May 31, 5:31 AM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Clay and 17 more	119 min
May 31, 10:00 AM CDT	Tornado Watch	SPC	Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 5 more	6 hr
May 31, 1:06 PM CDT	Mesoscale Discussion	SPC	Baldwin, Coffee, Conecuh, Covington, Dale, Escambia and 5 more	54 min
May 31, 3:30 PM CDT	Tornado Watch	SPC	Dale, Geneva, Henry, Houston	4 hr
May 31, 10:18 AM CDT	Mesoscale Discussion	SPC	Nassau	27 min
May 31, 10:40 AM CDT	Severe Thunderstorm Watch	SPC	Hamilton	6 hr
May 31, 1:27 PM CDT	Mesoscale Discussion	SPC	Hamilton	63 min
May 31, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 5 more	5 hr
May 31, 5:28 PM CDT	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Columbia, Duval and 3 more	92 min
May 31, 5:59 PM CDT	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Jefferson, Leon, Liberty and 1 more	61 min
May 31, 6:30 PM CDT	Tornado Watch	SPC	Baker, Bradford, Clay, Columbia, Duval, Hamilton and 5 more	4 hr
May 31, 8:10 AM CDT	Severe Thunderstorm Watch	SPC	Burke, Columbia, Elbert, Glascock, Greene, Hancock and 12 more	5 hr
May 30, 8:55 PM CDT	Mesoscale Discussion	SPC	Avoyelles, Bienville, Bossier, Caddo, Caldwell, Catahoula and 23 more	65 min
May 30, 10:35 PM CDT	Tornado Watch	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, East Carroll and 10 more	5 hr
May 31, 1:27 AM CDT	Mesoscale Discussion	SPC	Bienville, Caldwell, De Soto, East Carroll, Franklin, Jackson and 7 more	2 hr
May 30, 10:55 PM CDT	Tornado Watch	SPC	Alcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 31 more	5 hr

Nearby

Mesoscale Discussions in Louisiana, 2004 Mesoscale Discussions in Georgia, 2004 Mesoscale Discussions in Florida, 2004 Every mesoscale discussion in 2004

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.