Alert archive / Alabama / Tornado Watches in 2010

Tornado Watch 757

November 30, 20104 states

The Storm Prediction Center issued this tornado watch at Nov 30, 2010, 3:49 AM CST for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Nov 30, 2010, 3:49 AM CST (09:49 UTC)
Expired: Nov 30, 2010, 12:00 PM CST
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 96 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Calhoun County, AL, Cherokee County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Cullman County, AL, Dallas County, AL, DeKalb County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Lowndes County, AL, Madison County, AL, Marengo County, AL, Marshall County, AL, Mobile County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafayette 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 Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, Amite County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Newton County, MS, Noxubee County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 121 km from the middle of the area, began a volume at 09:52 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: 40%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 10%
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: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Nov 30, 4:03 AM CST	Tornado Warning	MOB	Clarke, Washington	42 min
Nov 30, 4:06 AM CST	Tornado Warning	JAN	Clarke, Jasper, Newton, Smith	39 min
Nov 30, 4:15 AM CST	Tornado Warning	BMX	Winston	13 min
Nov 30, 4:17 AM CST	Flash Flood Warning	HUN	Morgan	5 hr
Nov 30, 4:21 AM CST	Severe Thunderstorm Warning	JAN	Covington, Jefferson Davis, Jones, Smith	39 min
Nov 30, 4:25 AM CST	Tornado Warning	BMX	Walker	8 min
Nov 30, 4:26 AM CST	Severe Thunderstorm Warning	HUN	Cullman	49 min
Nov 30, 4:34 AM CST	Tornado Warning	JAN	Clarke, Jasper, Lauderdale, Newton	56 min
Nov 30, 4:39 AM CST	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	51 min
Nov 30, 4:40 AM CST	Tornado Warning	MOB	Clarke	24 min
Nov 30, 4:41 AM CST	Severe Thunderstorm Warning	JAN	Kemper, Noxubee	34 min
Nov 30, 4:43 AM CST	Tornado Warning	BMX	Greene, Pickens, Sumter	32 min
Nov 30, 4:45 AM CST	Tornado Warning	JAN	Covington, Jasper, Jones, Smith	60 min
Nov 30, 5:04 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Tuscaloosa, Walker	26 min
Nov 30, 5:16 AM CST	Tornado Warning	JAN	Kemper, Lauderdale	59 min
Nov 30, 5:22 AM CST	Flash Flood Warning	JAN	Clarke, Jasper, Kemper, Lauderdale, Newton	81 min
Nov 30, 5:24 AM CST	Tornado Warning	MOB	Washington	36 min
Nov 30, 5:27 AM CST	Tornado Warning	MOB	Washington	24 min
Nov 30, 5:29 AM CST	Tornado Warning	JAN	Jones	46 min
Nov 30, 5:32 AM CST	Severe Thunderstorm Warning	BMX	Greene, Pickens, Tuscaloosa	43 min
Nov 30, 5:34 AM CST	Severe Thunderstorm Warning	JAN	Covington, Forrest, Jones, Lamar, Marion	71 min
Nov 30, 5:36 AM CST	Tornado Warning	LIX	Saint Tammany, Tangipahoa, Washington	24 min
Nov 30, 5:37 AM CST	Flash Flood Warning	HUN	Cullman	2 hr
Nov 30, 5:41 AM CST	Severe Thunderstorm Warning	BMX	Greene, Sumter	34 min
Nov 30, 5:41 AM CST	Tornado Warning	LIX	Washington	34 min
Nov 30, 5:44 AM CST	Tornado Warning	BMX	Walker, Winston	46 min
Nov 30, 5:45 AM CST	Severe Thunderstorm Warning	JAN	Clarke, Jasper, Lauderdale	50 min
Nov 30, 6:00 AM CST	Tornado Warning	MOB	Washington	30 min
Nov 30, 6:02 AM CST	Tornado Warning	BMX	Fayette, Tuscaloosa, Walker	28 min
Nov 30, 6:04 AM CST	Severe Thunderstorm Warning	MOB	Clarke, Washington	26 min
Nov 30, 6:06 AM CST	Tornado Warning	LIX	Saint Tammany, Tangipahoa, Washington	24 min
Nov 30, 6:10 AM CST	Severe Thunderstorm Warning	JAN	Forrest, Lamar	50 min
Nov 30, 6:18 AM CST	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Tuscaloosa, Walker	42 min
Nov 30, 6:19 AM CST	Tornado Warning	LIX	Washington	26 min
Nov 30, 6:24 AM CST	Tornado Warning	MOB	Clarke, Washington	36 min
Nov 30, 6:29 AM CST	Severe Thunderstorm Warning	MOB	Clarke, Wilcox	31 min
Nov 30, 6:30 AM CST	Tornado Warning	LIX	Saint Tammany	30 min
Nov 30, 6:39 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles	66 min
Nov 30, 6:42 AM CST	Severe Thunderstorm Warning	LIX	Washington	29 min
Nov 30, 6:53 AM CST	Tornado Warning	MOB	Clarke, Wilcox	37 min
Nov 30, 6:55 AM CST	Severe Thunderstorm Warning	BMX	Blount, Etowah, Jefferson, St. Clair, Shelby, Tuscaloosa	50 min
Nov 30, 7:28 AM CST	Severe Thunderstorm Warning	MOB	Wilcox	32 min
Nov 30, 7:30 AM CST	Tornado Warning	MOB	Clarke, Washington	30 min
Nov 30, 7:35 AM CST	Severe Thunderstorm Warning	MOB	Washington	40 min
Nov 30, 7:41 AM CST	Severe Thunderstorm Warning	BMX	Blount, Etowah, Jefferson, St. Clair, Shelby, Talladega	49 min
Nov 30, 7:57 AM CST	Tornado Warning	MOB	Clarke, Wilcox	33 min
Nov 30, 7:59 AM CST	Tornado Warning	BMX	Bibb, Chilton, Perry, Shelby	46 min
Nov 30, 8:04 AM CST	Severe Thunderstorm Warning	BMX	Dallas	41 min
Nov 30, 8:24 AM CST	Tornado Warning	BMX	Dallas	36 min
Nov 30, 8:27 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Etowah, St. Clair, Shelby and 1 more	48 min
Nov 30, 8:33 AM CST	Severe Thunderstorm Warning	HUN	DeKalb	27 min
Nov 30, 8:42 AM CST	Tornado Warning	BMX	Shelby	15 min
Nov 30, 8:49 AM CST	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Dallas	41 min
Nov 30, 8:54 AM CST	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	51 min
Nov 30, 9:00 AM CST	Severe Thunderstorm Warning	HUN	DeKalb	15 min
Nov 30, 9:03 AM CST	Severe Thunderstorm Warning	LIX	Plaquemines	57 min
Nov 30, 9:10 AM CST	Tornado Warning	MOB	Wilcox	13 min
Nov 30, 9:13 AM CST	Tornado Warning	BMX	Autauga, Chilton	20 min
Nov 30, 9:16 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Etowah, St. Clair, Talladega	44 min
Nov 30, 9:29 AM CST	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Coosa, Dallas, Elmore, Lowndes	46 min
Nov 30, 9:35 AM CST	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	25 min
Nov 30, 9:45 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Cleburne, Randolph, Talladega	45 min
Nov 30, 9:45 AM CST	Tornado Warning	BMX	Chilton, Coosa	30 min
Nov 30, 10:00 AM CST	Severe Thunderstorm Warning	BMX	Cherokee	30 min
Nov 30, 10:08 AM CST	Severe Thunderstorm Warning	BMX	Coosa, Elmore, Lowndes, Montgomery, Tallapoosa	52 min
Nov 30, 10:13 AM CST	Tornado Warning	BMX	Clay	32 min
Nov 30, 10:20 AM CST	Tornado Warning	BMX	Elmore	25 min
Nov 30, 10:27 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Cleburne, Randolph	63 min
Nov 30, 10:42 AM CST	Tornado Warning	BMX	Coosa, Elmore, Tallapoosa	20 min
Nov 30, 10:54 AM CST	Severe Thunderstorm Warning	BMX	Chambers, Elmore, Lee, Tallapoosa	51 min
Nov 30, 11:28 AM CST	Severe Thunderstorm Warning	BMX	Cleburne, Randolph	32 min

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 00:00Z, 9.8 hours before the alert went out and 130 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: 946 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 406 m²/s²
0-3 km storm-relative helicity: 492 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 13.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 29, 10:57 PM CST	Mesoscale Discussion	SPC	Blount, Cullman, DeKalb, Fayette, Franklin, Jackson and 11 more	93 min
Nov 29, 11:41 PM CST	Tornado Watch	SPC	Bibb, Blount, Colbert, Cullman, DeKalb, Etowah and 23 more	4 hr
Nov 30, 1:44 AM CST	Mesoscale Discussion	SPC	Cullman, Fayette, Greene, Hale, Pickens, Sumter and 3 more	91 min
Nov 30, 3:17 AM CST	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Butler, Calhoun, Chambers and 36 more	58 min
Nov 30, 3:39 AM CST	Mesoscale Discussion	SPC	Blount, Cullman, Jefferson, Tuscaloosa, Walker	96 min
Nov 30, 6:30 AM CST	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Chilton, Choctaw, Clarke and 14 more	90 min
Nov 30, 7:00 AM CST	Mesoscale Discussion	SPC	Baldwin, Barbour, Bullock, Butler, Chambers, Coffee and 18 more	60 min
Nov 30, 7:43 AM CST	Tornado Watch	SPC	Baldwin, Barbour, Bullock, Butler, Chambers, Coffee and 14 more	8 hr
Nov 30, 9:38 AM CST	Mesoscale Discussion	SPC	Autauga, Bullock, Butler, Calhoun, Chambers, Cherokee and 20 more	97 min
Nov 30, 12:17 PM CST	Mesoscale Discussion	SPC	Baldwin, Banks, Barrow, Bibb, Bleckley, Butts and 65 more	118 min
Nov 30, 1:15 PM CST	Mesoscale Discussion	SPC	Appling, Atkinson, Bacon, Brantley, Bryan, Bulloch and 27 more	2 hr
Nov 30, 1:34 PM CST	Tornado Watch	SPC	Baldwin, Banks, Barrow, Bibb, Bleckley, Burke and 79 more	7 hr
Nov 30, 3:24 PM CST	Mesoscale Discussion	SPC	Baldwin, Banks, Barrow, Bibb, Bleckley, Burke and 54 more	96 min
Nov 29, 8:24 PM CST	Mesoscale Discussion	SPC	East Feliciana, West Feliciana	96 min
Nov 29, 8:49 PM CST	Tornado Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Calcasieu and 23 more	7 hr

Nearby

Tornado Watches in Alabama, 2010 Tornado Watches in Mississippi, 2010 Tornado Watches in Louisiana, 2010 Every tornado watch 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.