Alert archive / Mississippi / Severe Thunderstorm Watches in 2009

Severe Thunderstorm Watch 232

May 3, 200914 counties in Alabama; 26 parishes in Louisiana; 36 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at May 3, 2009, 7:44 AM CDT for 14 counties in Alabama; 26 parishes in Louisiana; 36 counties in Mississippi. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 3, 2009, 7:44 AM CDT (12:44 UTC)
Expired: May 3, 2009, 3:51 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 70 kt

All 76 counties

Bibb County, AL, Chilton County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Avoyelles Parish, LA, Calcasieu Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Madison Parish, LA, Pointe Coupee Parish, LA, Richland Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Lowndes County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Warren County, MS, Wilkinson County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 79 km from the middle of the area, began a volume at 12:47 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 20%
One or more EF2 to EF5 tornadoes: 10%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 10%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

45 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 3, 7:58 AM CDT	Severe Thunderstorm Warning	JAN	Winston	47 min
May 3, 8:14 AM CDT	Severe Thunderstorm Warning	JAN	Kemper, Neshoba	61 min
May 3, 8:20 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee	55 min
May 3, 8:24 AM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Franklin	66 min
May 3, 8:36 AM CDT	Tornado Warning	JAN	Catahoula, Concordia, Franklin, Tensas	54 min
May 3, 8:37 AM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	53 min
May 3, 8:54 AM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia, Franklin, Tensas	66 min
May 3, 8:59 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	46 min
May 3, 9:19 AM CDT	Tornado Warning	JAN	Madison, Tensas	56 min
May 3, 9:32 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Wilkinson	58 min
May 3, 9:38 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles	37 min
May 3, 9:40 AM CDT	Severe Thunderstorm Warning	JAN	Adams, Claiborne, Copiah, Franklin, Jefferson, Lincoln	65 min
May 3, 10:12 AM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Copiah, Hinds, Warren	63 min
May 3, 10:31 AM CDT	Severe Thunderstorm Warning	JAN	Copiah, Hinds, Jefferson Davis, Lawrence, Lincoln, Madison and 2 more	59 min
May 3, 10:31 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike	59 min
May 3, 10:40 AM CDT	Flash Flood Warning	LCH	Allen, Avoyelles, Beauregard, Evangeline, Rapides, Saint Landry and 1 more	110 min
May 3, 10:57 AM CDT	Tornado Warning	JAN	Jefferson Davis, Lawrence, Simpson, Smith	44 min
May 3, 10:59 AM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar, Marion	61 min
May 3, 11:10 AM CDT	Severe Thunderstorm Warning	JAN	Covington, Jones	65 min
May 3, 11:24 AM CDT	Severe Thunderstorm Warning	JAN	Jasper, Smith	66 min
May 3, 11:28 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Greene, Hale, Tuscaloosa	15 min
May 3, 11:29 AM CDT	Severe Thunderstorm Warning	JAN	Rankin, Scott, Smith	46 min
May 3, 11:37 AM CDT	Tornado Warning	JAN	Jasper	38 min
May 3, 11:47 AM CDT	Severe Thunderstorm Warning	JAN	Clarke, Lauderdale, Newton	58 min
May 3, 12:03 PM CDT	Tornado Warning	JAN	Clarke	31 min
May 3, 12:19 PM CDT	Flash Flood Warning	JAN	Attala, Choctaw, Oktibbeha, Winston	2 hr
May 3, 12:28 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar	21 min
May 3, 12:29 PM CDT	Severe Thunderstorm Warning	BMX	Marengo, Sumter	61 min
May 3, 12:31 PM CDT	Flash Flood Warning	LCH	Allen, Avoyelles, Beauregard, Calcasieu, Evangeline, Jefferson Davis and 3 more	119 min
May 3, 12:50 PM CDT	Tornado Warning	BMX	Greene, Hale, Marengo, Sumter	55 min
May 3, 12:54 PM CDT	Tornado Warning	BMX	Bibb, Jefferson, Shelby, Tuscaloosa	51 min
May 3, 12:58 PM CDT	Tornado Warning	BMX	Greene, Hale, Sumter	62 min
May 3, 1:18 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Dallas, Greene, Hale, Marengo, Perry and 2 more	57 min
May 3, 1:23 PM CDT	Tornado Warning	BMX	Jefferson, Shelby	67 min
May 3, 1:33 PM CDT	Tornado Warning	BMX	Bibb, Chilton, Dallas, Hale, Perry	42 min
May 3, 1:40 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Jefferson, Shelby, Tuscaloosa	50 min
May 3, 1:40 PM CDT	Tornado Warning	BMX	Bibb, Greene, Hale, Perry, Tuscaloosa	50 min
May 3, 1:42 PM CDT	Flash Flood Warning	BMX	Bibb, Jefferson, Shelby, Tuscaloosa	2 hr
May 3, 1:46 PM CDT	Tornado Warning	BMX	Jefferson, Shelby	44 min
May 3, 1:47 PM CDT	Flash Flood Warning	LCH	Acadia, Evangeline, Jefferson Davis, Lafayette, Saint Landry, Saint Martin	118 min
May 3, 1:55 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 6 more	65 min
May 3, 2:02 PM CDT	Tornado Warning	BMX	Jefferson, St. Clair, Shelby, Talladega	58 min
May 3, 2:28 PM CDT	Flash Flood Warning	LCH	Allen, Avoyelles, Beauregard, Calcasieu, Evangeline, Jefferson Davis and 3 more	107 min
May 3, 2:32 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Bibb, Bullock, Chilton, Clay, Coosa and 7 more	58 min
May 3, 3:44 PM CDT	Flash Flood Warning	LCH	Acadia, Allen, Evangeline, Jefferson Davis, Saint Landry	2 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 0.7 hours before the alert went out and 80 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: 1741 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 200 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 9.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 2, 7:30 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Clay, Cullman, Etowah and 12 more	60 min
May 2, 8:43 PM CDT	Tornado Watch	SPC	Bibb, Blount, Chilton, Fayette, Greene, Hale and 9 more	6 hr
May 2, 10:40 PM CDT	Mesoscale Discussion	SPC	Bibb, Greene, Hale, Jefferson, Pickens, Tuscaloosa	2 hr
May 3, 7:18 AM CDT	Mesoscale Discussion	SPC	Bibb, Chilton, Fayette, Greene, Hale, Jefferson and 6 more	57 min
May 3, 9:24 AM CDT	Mesoscale Discussion	SPC	Choctaw, Greene, Hale, Lamar, Marengo, Perry and 3 more	66 min
May 3, 10:56 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Calhoun and 39 more	64 min
May 3, 11:35 AM CDT	Severe Thunderstorm Watch	SPC	Autauga, Baldwin, Barbour, Blount, Bullock, Butler and 29 more	5 hr
May 3, 1:49 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Bullock, Butler, Calhoun, Chambers and 22 more	56 min
May 3, 3:11 PM CDT	Severe Thunderstorm Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	3 hr
May 3, 3:13 PM CDT	Mesoscale Discussion	SPC	Barbour, Bullock, Calhoun, Chambers, Cherokee, Clay and 16 more	62 min
May 3, 5:36 PM CDT	Mesoscale Discussion	SPC	Henry	84 min
May 2, 7:38 PM CDT	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Claiborne, Lincoln, Morehouse and 5 more	97 min
May 2, 11:43 PM CDT	Severe Thunderstorm Watch	SPC	Bossier, Caddo, Claiborne, Lincoln, Ouachita, Union and 1 more	5 hr
May 3, 2:39 AM CDT	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne and 19 more	2 hr
May 3, 5:12 AM CDT	Severe Thunderstorm Watch	SPC	Beauregard, Bienville, Bossier, Caddo, Caldwell, Claiborne and 14 more	7 hr
May 3, 6:54 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Bienville, Caddo and 25 more	2 hr

Nearby

Severe Thunderstorm Watches in Mississippi, 2009 Severe Thunderstorm Watches in Louisiana, 2009 Severe Thunderstorm Watches in Alabama, 2009 Every severe thunderstorm watch 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.