Alert archive / Louisiana / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 79
The Storm Prediction Center issued this severe thunderstorm watch at Apr 8, 2002, 1:15 AM CDT for 15 parishes in Louisiana; Adams County, Wilkinson County, Mississippi; 10 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 8, 2002, 1:15 AM CDT (06:15 UTC)
- Expired
- Apr 8, 2002, 6:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 27 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Concordia Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Adams County, MS, Wilkinson County, MS, Chambers County, TX, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Newton County, TX, Orange County, TX, Sabine County, TX, San Augustine County, TX, Tyler County, TX
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 1:47 AM CDT | Severe Thunderstorm Warning | LCH | Hardin, Jasper, Tyler | 58 min |
| Apr 8, 2:47 AM CDT | Severe Thunderstorm Warning | LCH | Jasper, Jefferson, Orange | 58 min |
| Apr 8, 2:49 AM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Vernon | 56 min |
| Apr 8, 2:50 AM CDT | Severe Thunderstorm Warning | LCH | Jasper, Jefferson, Orange | 55 min |
| Apr 8, 3:36 AM CDT | Severe Thunderstorm Warning | LCH | Allen, Beauregard | 54 min |
| Apr 8, 3:54 AM CDT | Severe Thunderstorm Warning | LCH | Calcasieu, Jefferson Davis | 66 min |
| Apr 8, 4:08 AM CDT | Severe Thunderstorm Warning | LCH | Evangeline, Rapides | 52 min |
| Apr 8, 4:09 AM CDT | Severe Thunderstorm Warning | LCH | Jefferson Davis | 51 min |
| Apr 8, 4:25 AM CDT | Severe Thunderstorm Warning | LCH | Avoyelles | 65 min |
| Apr 8, 4:30 AM CDT | Severe Thunderstorm Warning | LCH | Allen | 30 min |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.3 hours before the alert went out and 50 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
- 645 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 735 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 080609 SEL9 SPC WW 080557 COR LAZ000-TXZ000-CWZ000-081100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 79 STORM PREDICTION CENTER NORMAN OK 1257 AM CDT MON APR 8 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHERN LOUISIANA FAR SOUTHEASTERN TEXAS COASTAL WATERS EFFECTIVE THIS MONDAY MORNING FROM 115 AM UNTIL 600 AM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 95 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTH SOUTHEAST OF PORT ARTHUR TEXAS TO 25 MILES WEST NORTHWEST OF ALEXANDRIA LOUISIANA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION... CONTINUE...WW 76...WW 77...WW 78...WW 79... DISCUSSION...INTENSE SQUALL LINE WITH INTERMITTENT SUPERCELLS AND SMALL BOW ECHOES WILL CONTINUE EWD ACROSS SOUTHERN LA OVER THE NEXT SEVERAL HOURS. AIR MASS WILL REMAIN VERY MOIST AND MODERATELY UNSTABLE...SUGGESTING LARGE HAIL AND DAMAGING WINDS SHOULD ACCOMPANY THIS ACTIVITY. AN ISOLATED TORNADO MAY ALSO OCCUR. AVIATION...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 27040. ...EVANS 313,0910 292,0921 292,0952 313,0941 WWUS20 KWNS 080609 SEL9 SPC WW 080557 COR LAZ000-TXZ000-CWZ000-081100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 79 STORM PREDICTION CENTER NORMAN OK 1257 AM CDT MON APR 8 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHERN LOUISIANA FAR SOUTHEASTERN TEXAS COASTAL WATERS EFFECTIVE THIS MONDAY MORNING FROM 115 AM UNTIL 600 AM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 95 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES SOUTH SOUTHEAST OF PORT ARTHUR TEXAS TO 25 MILES WEST NORTHWEST OF ALEXANDRIA LOUISIANA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION... CONTINUE...WW 76...WW 77...WW 78...WW 79... DISCUSSION...INTENSE SQUALL LINE WITH INTERMITTENT SUPERCELLS AND SMALL BOW ECHOES WILL CONTINUE EWD ACROSS SOUTHERN LA OVER THE NEXT SEVERAL HOURS. AIR MASS WILL REMAIN VERY MOIST AND MODERATELY UNSTABLE...SUGGESTING LARGE HAIL AND DAMAGING WINDS SHOULD ACCOMPANY THIS ACTIVITY. AN ISOLATED TORNADO MAY ALSO OCCUR. AVIATION...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 27040. ...EVANS 313,0910 292,0921 292,0952 313,0941
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Bienville, Caldwell, Catahoula, Claiborne, East Carroll, Franklin and 13 more | 5 hr |
| Apr 8, 12:30 PM CDT | Tornado Watch | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 6 more | 6 hr |
| Apr 7, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bastrop, Bell, Burleson, Caldwell, Collin and 36 more | 5 hr |
| Apr 7, 11:00 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Austin, Brazoria, Brazos, Colorado, Fort Bend and 14 more | 4 hr |
| Apr 8, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bee, Bexar, DeWitt, Frio and 12 more | 4 hr |
| Apr 8, 3:00 AM CDT | Severe Thunderstorm Watch | SPC | Austin, Brazoria, Calhoun, Colorado, Fort Bend, Galveston and 7 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2002Severe Thunderstorm Watches in Texas, 2002Severe Thunderstorm Watches in Mississippi, 2002Every severe thunderstorm 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.