Alert archive / Mississippi / Tornado Watches in 2004

Tornado Watch 914

December 6, 20044 counties in Arkansas; 15 parishes in Louisiana; 44 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Dec 6, 2004, 11:20 PM CST for 4 counties in Arkansas; 15 parishes in Louisiana; 44 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Dec 6, 2004, 11:20 PM CST (05:20 UTC)
Expired: Dec 7, 2004, 5:00 AM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 63 counties

Ashley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Coahoma County, MS, Copiah County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Oktibbeha County, MS, Pontotoc County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 106 km from the middle of the area, began a volume at 05:24 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Dec 6, 11:44 PM CST	Severe Thunderstorm Warning	JAN	Sharkey, Washington	46 min
Dec 6, 11:49 PM CST	Severe Thunderstorm Warning	SHV	Caldwell	56 min
Dec 6, 11:50 PM CST	Tornado Warning	JAN	Chicot	25 min
Dec 6, 11:51 PM CST	Severe Thunderstorm Warning	JAN	Morehouse, Richland	39 min
Dec 7, 12:01 AM CST	Severe Thunderstorm Warning	JAN	Catahoula	44 min
Dec 7, 12:05 AM CST	Tornado Warning	JAN	Leflore, Sunflower	40 min
Dec 7, 12:08 AM CST	Severe Thunderstorm Warning	JAN	Franklin	52 min
Dec 7, 12:11 AM CST	Severe Thunderstorm Warning	JAN	East Carroll, West Carroll	49 min
Dec 7, 12:19 AM CST	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey	56 min
Dec 7, 12:34 AM CST	Tornado Warning	JAN	Carroll, Grenada, Leflore	41 min
Dec 7, 12:36 AM CST	Tornado Warning	JAN	Catahoula, Concordia	39 min
Dec 7, 12:39 AM CST	Severe Thunderstorm Warning	JAN	Tensas	51 min
Dec 7, 12:44 AM CST	Tornado Warning	JAN	Holmes, Humphreys, Sharkey	46 min
Dec 7, 12:47 AM CST	Severe Thunderstorm Warning	JAN	Madison	43 min
Dec 7, 12:52 AM CST	Severe Thunderstorm Warning	JAN	Yazoo	38 min
Dec 7, 12:57 AM CST	Severe Thunderstorm Warning	JAN	Claiborne	63 min
Dec 7, 1:12 AM CST	Tornado Warning	JAN	Grenada	33 min
Dec 7, 1:22 AM CST	Severe Thunderstorm Warning	JAN	Yazoo	38 min
Dec 7, 1:26 AM CST	Severe Thunderstorm Warning	JAN	Hinds	64 min
Dec 7, 1:30 AM CST	Flash Flood Warning	MEG	Calhoun, Yalobusha	2 hr
Dec 7, 1:31 AM CST	Tornado Warning	JAN	Holmes	29 min
Dec 7, 1:36 AM CST	Tornado Warning	JAN	Hinds	54 min
Dec 7, 1:37 AM CST	Flash Flood Warning	JAN	Carroll, Grenada, Montgomery	53 min
Dec 7, 1:39 AM CST	Severe Thunderstorm Warning	JAN	Adams, Franklin, Jefferson	51 min
Dec 7, 1:44 AM CST	Tornado Warning	JAN	Carroll, Montgomery, Webster	31 min
Dec 7, 1:50 AM CST	Severe Thunderstorm Warning	JAN	Madison, Yazoo	25 min
Dec 7, 1:57 AM CST	Severe Thunderstorm Warning	JAN	Attala, Choctaw	33 min
Dec 7, 1:58 AM CST	Severe Thunderstorm Warning	JAN	Claiborne, Copiah	62 min
Dec 7, 2:04 AM CST	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw	26 min
Dec 7, 2:07 AM CST	Severe Thunderstorm Warning	JAN	Rankin	53 min
Dec 7, 2:13 AM CST	Tornado Warning	MEG	Chickasaw, Lee, Pontotoc	47 min
Dec 7, 2:14 AM CST	Severe Thunderstorm Warning	JAN	Leake, Madison	46 min
Dec 7, 2:23 AM CST	Tornado Warning	JAN	Attala, Choctaw, Winston	37 min
Dec 7, 2:28 AM CST	Tornado Warning	JAN	Rankin	47 min
Dec 7, 2:31 AM CST	Tornado Warning	JAN	Rankin	44 min
Dec 7, 2:31 AM CST	Tornado Warning	MEG	Monroe	29 min
Dec 7, 2:32 AM CST	Severe Thunderstorm Warning	JAN	Clay, Oktibbeha, Webster	43 min
Dec 7, 2:48 AM CST	Severe Thunderstorm Warning	JAN	Scott	57 min
Dec 7, 2:54 AM CST	Severe Thunderstorm Warning	JAN	Leake, Neshoba	36 min
Dec 7, 2:55 AM CST	Severe Thunderstorm Warning	JAN	Copiah, Simpson	65 min
Dec 7, 2:57 AM CST	Severe Thunderstorm Warning	JAN	Smith	63 min
Dec 7, 2:59 AM CST	Tornado Warning	JAN	Noxubee, Winston	46 min
Dec 7, 3:14 AM CST	Severe Thunderstorm Warning	JAN	Clay, Lowndes, Oktibbeha	31 min
Dec 7, 3:15 AM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence	45 min
Dec 7, 3:19 AM CST	Severe Thunderstorm Warning	JAN	Newton	41 min
Dec 7, 3:28 AM CST	Severe Thunderstorm Warning	JAN	Neshoba	32 min
Dec 7, 3:41 AM CST	Tornado Warning	JAN	Lowndes	34 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, 5.3 hours before the alert went out and 96 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: 278 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 650 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 070518
SEL4  
SPC WW 070520
ARZ000-LAZ000-MSZ000-071100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 914
NWS STORM PREDICTION CENTER NORMAN OK
1120 PM CST MON DEC 6 2004

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHEAST ARKANSAS
       NORTHEAST LOUISIANA
       MUCH OF MISSISSIPPI

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 1120 PM UNTIL
500 AM CST.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS ALONG AND 100 STATUTE MILES EAST AND
WEST OF A LINE FROM 20 MILES SOUTH SOUTHWEST OF NATCHEZ
MISSISSIPPI TO 55 MILES NORTH NORTHEAST OF GREENWOOD MISSISSIPPI.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 913. WATCH NUMBER 913 WILL NOT BE IN
EFFECT AFTER 1120 PM CST. 

DISCUSSION...SQUALL LINE MOVING EWD ACROSS ERN AR INTO NRN LA...WITH
E/W BOUNDARY SHIFTING NWD THRU NERN LA/CNTRL MS.  VERY STRONG DEEP
LAYER SHEAR FAVORABLE FOR TORNADIC SUPERCELLS IN PLACE WITH APPROACH
OF VIGOROUS UPPER TROUGH.  INCREASING THREAT FOR TORNADOES
ALONG/AHEAD OF SQUALL LINE NEXT SEVERAL HOURS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24045.


...HALES

312,0930 341,0912 341,0875 312,0894

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 6, 8:36 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 36 more	84 min
Dec 6, 8:50 PM CST	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 9 more	5 hr
Dec 6, 9:51 PM CST	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Independence and 13 more	114 min
Dec 6, 11:00 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more	90 min
Dec 7, 1:25 AM CST	Mesoscale Discussion	SPC	Concordia, Tensas	95 min
Dec 7, 3:25 AM CST	Tornado Watch	SPC	Kemper, Lauderdale, Noxubee	5 hr
Dec 7, 6:03 AM CST	Mesoscale Discussion	SPC	George, Greene, Hancock, Harrison, Jackson, Perry and 1 more	57 min

Nearby

Tornado Watches in Mississippi, 2004 Tornado Watches in Louisiana, 2004 Tornado Watches in Arkansas, 2004 Every tornado watch 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.