Alert archive / Mississippi / Tornado Watches in 2002
Tornado Watch 793
The Storm Prediction Center issued this tornado watch at Dec 19, 2002, 9:35 AM CST for 9 counties in Alabama; 8 parishes in Louisiana; 15 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 19, 2002, 9:35 AM CST (15:35 UTC)
- Expired
- Dec 19, 2002, 3:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Autauga County, AL, Choctaw County, AL, Clarke County, AL, Dallas County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Tammany Parish, LA, Terrebonne Parish, LA, Clarke County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 102 km from the middle of the area, began a volume at 15:35 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
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 19, 9:42 AM CST | Severe Thunderstorm Warning | LIX | Saint Charles | 33 min |
| Dec 19, 10:19 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 26 min |
| Dec 19, 10:48 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 42 min |
| Dec 19, 11:42 AM CST | Tornado Warning | MOB | Greene | 5 hr |
| Dec 19, 11:48 AM CST | Tornado Warning | MOB | Washington | 4 days |
| Dec 19, 12:06 PM CST | Severe Thunderstorm Warning | LIX | Orleans, Plaquemines, Saint Bernard | 24 min |
| Dec 19, 12:31 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Iberville, Livingston, Saint Helena, Saint Tammany, Tangipahoa and 1 more | 59 min |
| Dec 19, 12:35 PM CST | Tornado Warning | LIX | Harrison | 25 min |
| Dec 19, 12:51 PM CST | Tornado Warning | LIX | Hancock, Harrison | 24 min |
| Dec 19, 12:59 PM CST | Tornado Warning | MOB | Washington | 4 days |
| Dec 19, 1:07 PM CST | Severe Thunderstorm Warning | LIX | Assumption, Jefferson, Lafourche, Saint Charles, Saint James, Saint John the Baptist and 1 more | 53 min |
| Dec 19, 1:17 PM CST | Severe Thunderstorm Warning | JAN | Jasper | 43 min |
| Dec 19, 1:20 PM CST | Tornado Warning | JAN | Lamar, Marion | 30 min |
| Dec 19, 1:30 PM CST | Tornado Warning | JAN | Lauderdale | 25 min |
| Dec 19, 1:32 PM CST | Tornado Warning | MOB | Washington | 4 days |
| Dec 19, 1:39 PM CST | Severe Thunderstorm Warning | JAN | Jones | 61 min |
| Dec 19, 1:48 PM CST | Tornado Warning | LIX | Pearl River | 27 min |
| Dec 19, 1:49 PM CST | Severe Thunderstorm Warning | JAN | Lamar | 26 min |
| Dec 19, 1:51 PM CST | Tornado Warning | MOB | Clarke | 5 days |
| Dec 19, 1:52 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 38 min |
| Dec 19, 1:55 PM CST | Severe Thunderstorm Warning | JAN | Lauderdale | 30 min |
| Dec 19, 1:59 PM CST | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 2 more | 91 min |
| Dec 19, 2:00 PM CST | Severe Thunderstorm Warning | JAN | Forrest | 40 min |
| Dec 19, 2:14 PM CST | Severe Thunderstorm Warning | JAN | Clarke | 31 min |
| Dec 19, 2:19 PM CST | Tornado Warning | LIX | Pearl River | 26 min |
| Dec 19, 2:25 PM CST | Severe Thunderstorm Warning | JAN | Lauderdale | 35 min |
| Dec 19, 2:39 PM CST | Severe Thunderstorm Warning | JAN | Forrest | 31 min |
| Dec 19, 2:45 PM CST | Severe Thunderstorm Warning | JAN | Clarke, Lauderdale | 30 min |
| Dec 19, 2:56 PM CST | Severe Thunderstorm Warning | LIX | Hancock, Harrison, Pearl River | 64 min |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 3.6 hours before the alert went out and 48 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.
- Mixed-layer CAPE
- 668 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 480 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 304 m²/s²
- 0-3 km storm-relative helicity
- 417 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 191534 SEL3 SPC WW 191535 ALZ000-LAZ000-MSZ000-CWZ000-192100- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 793 STORM PREDICTION CENTER NORMAN OK 935 AM CST THU DEC 19 2002 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHWEST ALABAMA SOUTHEAST LOUISIANA SOUTHERN MISSISSIPPI COASTAL WATERS EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 935 AM UNTIL 300 PM CST. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES WEST SOUTHWEST OF BOOTHVILLE LOUISIANA TO 40 MILES WEST NORTHWEST OF SELMA ALABAMA. 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... CONTINUE...WW 791...WW 792... DISCUSSION...THUNDERSTORMS DEVELOPING IN WARM SECTOR E OF SQUALL LINE CURRENTLY LOCATED WRN SWRN MS INTO SCENTRAL LA. STRONG DEEP LAYER SHEAR COUPLED WITH VERY MOIST AND UNSTABLE AIRMASS WILL SUPPORT TORNADIC SUPERCELLS. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 23040. ...HALES 290,0911 323,0884 323,0862 290,0885
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 19, 11:40 AM CST | Tornado Watch | SPC | Autauga, Bibb, Chilton, Choctaw, Clarke, Dallas and 12 more | 6 hr |
| Dec 19, 3:15 PM CST | Tornado Watch | SPC | Barbour, Bullock, Butler, Chambers, Clay, Coffee and 17 more | 6 hr |
| Dec 18, 8:55 PM CST | Tornado Watch | SPC | Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 13 more | 6 hr |
| Dec 19, 12:30 AM CST | Tornado Watch | SPC | Allen, Beauregard, Calcasieu, Evangeline | 7 hr |
| Dec 19, 2:25 AM CST | Tornado Watch | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Claiborne, Concordia and 20 more | 8 hr |
| Dec 19, 6:30 AM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Cameron and 26 more | 6 hr |
| Dec 18, 9:05 PM CST | Tornado Watch | SPC | Benton, Coahoma, DeSoto, Lafayette, Marshall, Panola and 5 more | 6 hr |
Nearby
Tornado Watches in Mississippi, 2002Tornado Watches in Alabama, 2002Tornado Watches in Louisiana, 2002Every tornado watch in 2002
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.