Alert archive / Louisiana / Tornado Watches in 2004
Tornado Watch 202
The Storm Prediction Center issued this tornado watch at May 13, 2004, 2:55 PM CDT for 37 parishes in Louisiana; Adams County, Wilkinson County, Mississippi. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 13, 2004, 2:55 PM CDT (19:55 UTC)
- Expired
- May 13, 2004, 9:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Acadia Parish, LA, Allen Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Union Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Webster Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Wilkinson County, MS
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 3:00 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Calcasieu, Vernon | 60 min |
| May 13, 3:17 PM CDT | Severe Thunderstorm Warning | SHV | Bossier | 43 min |
| May 13, 3:57 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Calcasieu, Vernon | 63 min |
| May 13, 4:31 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Jefferson Davis | 59 min |
| May 13, 5:16 PM CDT | Severe Thunderstorm Warning | LCH | Acadia, Evangeline, Saint Landry | 59 min |
| May 13, 8:41 PM CDT | Flash Flood Warning | LIX | West Feliciana | 3 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
Shreveport, LA (KSHV), launched 12:00Z, 7.9 hours before the alert went out and 174 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
- 2148 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
308
WWUS20 KWNS 131954
SEL2
SPC WW 131955
LAZ000-CWZ000-140200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 202
NWS STORM PREDICTION CENTER NORMAN OK
255 PM CDT THU MAY 13 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
MUCH OF LOUISIANA EXCEPT SOUTHEAST PORTION
COASTAL WATERS
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 255 PM UNTIL
900 PM CDT.
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 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 55 MILES NORTHWEST OF MONROE LOUISIANA TO 20 MILES
SOUTHEAST OF INTRACOASTAL CITY LOUISIANA.
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 198...WW 199...WW 200...WW
201...
DISCUSSION...WELL ORGANIZED SEVERE MCS ERN TX WILL CONTINUE EWD
FEEDING ON THE VERY MOIST AND UNSTABLE AIR MASS AVAILABLE W OF MS
RIVER. WITH 30-40 KNOT SLY LOW LEVEL JET...SHEAR WILL SUPPORT
ISOLATED TORNADOES ON LEADING EDGE LINE OF SEVERE THUNDERSTORMS. IN
ADDITION DAMAGING WINDS ARE LIKELY ALONG THE LINE AS IT CONTINUES
EWD ACROSS LA.
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 550.
MEAN STORM MOTION VECTOR 27025.
...HALES
330,0914 293,0905 293,0925 330,0934SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 8:03 PM CDT | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more | 57 min |
| May 13, 12:10 PM CDT | Tornado Watch | SPC | Allen, Beauregard, Calcasieu | 6 hr |
| May 13, 1:38 PM CDT | Mesoscale Discussion | SPC | Beauregard, Calcasieu, Sabine | 97 min |
| May 13, 3:54 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Assumption, Avoyelles, Bienville, Caldwell and 29 more | 2 hr |
| May 13, 5:22 PM CDT | Mesoscale Discussion | SPC | Calcasieu | 53 min |
| May 13, 6:23 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Assumption, Avoyelles, Bienville, Caldwell and 30 more | 97 min |
Nearby
Tornado Watches in Louisiana, 2004Tornado Watches in Mississippi, 2004Every 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.