Alert archive / Louisiana / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 38
The Storm Prediction Center issued this severe thunderstorm watch at Mar 25, 2002, 6:30 PM CST for 9 counties in Arkansas; 25 parishes in Louisiana; Sabine County, San Augustine County, Shelby County, Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 25, 2002, 6:30 PM CST (00:30 UTC)
- Expired
- Mar 26, 2002, 12:00 AM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 37 counties
Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Columbia County, AR, Drew County, AR, Lafayette County, AR, Ouachita County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Sabine County, TX, San Augustine County, TX, Shelby County, TX
The radar
The Shreveport radar (KSHV), 85 km from the middle of the area, began a volume at 00:29 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
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 7:27 PM CST | Severe Thunderstorm Warning | SHV | Shelby | 63 min |
| Mar 25, 8:24 PM CST | Severe Thunderstorm Warning | SHV | Union | 51 min |
| Mar 25, 8:58 PM CST | Severe Thunderstorm Warning | SHV | De Soto | 62 min |
| Mar 25, 9:04 PM CST | Severe Thunderstorm Warning | SHV | Shelby | 56 min |
| Mar 25, 9:11 PM CST | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 39 min |
| Mar 25, 9:40 PM CST | Severe Thunderstorm Warning | SHV | Webster | 50 min |
| Mar 25, 9:46 PM CST | Severe Thunderstorm Warning | SHV | Red River | 44 min |
| Mar 25, 9:49 PM CST | Severe Thunderstorm Warning | LCH | Rapides | 56 min |
| Mar 25, 10:18 PM CST | Severe Thunderstorm Warning | JAN | Ashley | 42 min |
| Mar 25, 10:29 PM CST | Severe Thunderstorm Warning | SHV | Union | 61 min |
| Mar 25, 10:33 PM CST | Severe Thunderstorm Warning | SHV | Natchitoches | 27 min |
| Mar 25, 10:42 PM CST | Severe Thunderstorm Warning | JAN | Chicot | 33 min |
| Mar 25, 10:52 PM CST | Severe Thunderstorm Warning | JAN | Morehouse | 38 min |
| Mar 25, 10:53 PM CST | Severe Thunderstorm Warning | SHV | Winn | 52 min |
| Mar 25, 11:50 PM CST | Severe Thunderstorm Warning | JAN | Concordia | 55 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 0.5 hours before the alert went out and 79 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
- 1114 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 504 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.7
The text
As transmitted, in the capitals the NWS used until 2016.
WWUS20 KWNS 260046 SEL8 SPC WW 260010 ARZ000-LAZ000-TXZ000-260600- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 38 STORM PREDICTION CENTER NORMAN OK 610 PM CST MON MAR 25 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHERN ARKANSAS NORTHERN AND CENTRAL LOUISIANA A SMALL PART OF EAST TEXAS EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 630 PM UNTIL MIDNIGHT CST. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST SOUTHWEST OF ALEXANDRIA LOUISIANA TO 40 MILES NORTHEAST OF EL DORADO ARKANSAS. 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 37... DISCUSSION...THUNDERSTORMS /INCLUDING A FEW SUPERCELLS/ EXPECTED TO DEVELOP OVER THE NEXT SEVERAL HOURS IN WW AREA AS DEEP ASCENT INCREASES WITH CONTINUED EWD ADVANCE OF 700 MB TROUGH NOW OVER E TX. THE OOZ SHV SOUNDING SHOWS EXISTING CAP HAS BEEN ERODED...WITH MEAN CAPE AOA 1000 J/KG. ACTIVITY SHOULD EVENTUALLY COALESCE INTO A BROKEN SQUALL LINE AND CONTINUE E INTO MS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24035. ...CORFIDI 333,0905 310,0913 310,0942 333,0934 WWUS20 KWNS 260046 SEL8 SPC WW 260010 ARZ000-LAZ000-TXZ000-260600- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 38 STORM PREDICTION CENTER NORMAN OK 610 PM CST MON MAR 25 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHERN ARKANSAS NORTHERN AND CENTRAL LOUISIANA A SMALL PART OF EAST TEXAS EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 630 PM UNTIL MIDNIGHT CST. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES WEST SOUTHWEST OF ALEXANDRIA LOUISIANA TO 40 MILES NORTHEAST OF EL DORADO ARKANSAS. 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 37... DISCUSSION...THUNDERSTORMS /INCLUDING A FEW SUPERCELLS/ EXPECTED TO DEVELOP OVER THE NEXT SEVERAL HOURS IN WW AREA AS DEEP ASCENT INCREASES WITH CONTINUED EWD ADVANCE OF 700 MB TROUGH NOW OVER E TX. THE OOZ SHV SOUNDING SHOWS EXISTING CAP HAS BEEN ERODED...WITH MEAN CAPE AOA 1000 J/KG. ACTIVITY SHOULD EVENTUALLY COALESCE INTO A BROKEN SQUALL LINE AND CONTINUE E INTO MS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 50 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24035. ...CORFIDI 333,0905 310,0913 310,0942 333,0934
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 25, 10:00 PM CST | Severe Thunderstorm Watch | SPC | Arkansas, Clay, Craighead, Crittenden, Cross, Desha and 9 more | 5 hr |
| Mar 25, 11:00 PM CST | Severe Thunderstorm Watch | SPC | Ashley, Bradley, Calhoun, Chicot, Cleveland, Desha and 3 more | 6 hr |
| Mar 25, 7:30 PM CST | Severe Thunderstorm Watch | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 7 more | 6 hr |
| Mar 26, 12:00 AM CST | Severe Thunderstorm Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 22 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2002Severe Thunderstorm Watches in Arkansas, 2002Severe Thunderstorm Watches in Texas, 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; radar from the NEXRAD Level II archive.