Alert archive / Louisiana / Tornado Warnings in 1991
Tornado Warning 4, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Apr 12, 1991, 7:32 AM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 58 min. 4 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 12, 1991, 7:32 AM CDT (12:32 UTC)
- Expired
- Apr 12, 1991, 8:30 AM CDT
- In force
- 58 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Bossier Parish, LA, Caddo Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 12, 7:40 AM CDT | Tornado F2 | Bossier, LA | |
| Apr 12, 7:45 AM CDT | Thunderstorm Wind 70 | Caddo, LA | |
| Apr 12, 7:50 AM CDT | Tornado F2 | Bossier, LA | |
| Apr 12, 8:07 AM CDT | Thunderstorm Wind 0 | Caddo, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Longview/Gregg, TX (KGGG), launched 12:00Z, 0.5 hours before the alert went out and 86 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
- 1212 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 562 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 222 m²/s²
- 0-3 km storm-relative helicity
- 364 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 121233 TORSHV LAC015-017-121330- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 732 AM CDT FRI APR 12 1991 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 830 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHWEST LOUISIANA ...BOSSIER PARISH...CADDO PARISH AT 732 AM THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A POSSIBLE TORNADO DEVELOPING OVER THE SHREVEPORT REGIONAL AIRPORT. MOVEMENT WAS EAST NORTHEAST NEAR 25 MILES AN HOUR. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHEGLTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 12, 1:33 AM CDT, 5 hours 59 minutes before
OKZ040-021-034-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001- 002-003-004-005-006-120730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 130 AM CDT FRI APR 12 1991 ...A SEVERE THUNDERSTORM WATCH REMAINED IN EFFECT UNTIL 300 AM FOR PARTS OF NORTHEAST TEXAS AND SOUTHEAST OKLAHOMA.... ...A FLASH FLOOD WATCH REMAINED IN EFFECT FOR SOUTHWEST ARKANSAS... AT 125 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED SCATTERED SHOWERS AND THUNDERSTORMS THAT EXTENDED WEST OF A LINE FROM NEAR ARKADELPHIA ARKANSAS TO NEAR MAGNOLIA ARKANSAS TO NEAR MINDEN LOUISIANA TO NEAR LUFKIN TEXAS. THE PRECIPITATION EXTENDED ON WEST TO NEAR DURANT OKLAHOMA AND GREENVILLE TEXAS. WITHIN THIS LARGE AREA... STRONG THUNDERSTORMS THAT WERE PRODUCING GUSTY WINDS AND HEAVY RAINS WERE LOCATED NORTHEAST OF LONGVIEW TEXAS...NEAR JEFFERSON TEXAS...NEAR LINDEN TEXAS...NEAR MAUD TEXAS...NEAR TEXARKANA ARKANSAS AND NEAR PLAIN DEALING LOUISIANA. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. . OTHER SCATTERED SHOWERS WERE NOTED FROM NEAR WARREN ARKANSAS TO NEAR SHERIDAN ARKANSAS. THE SHOWERS AND THUNDERSTORMS OVER NORTH CENTRAL AND NORTHEAST TEXAS WILL CONTINUE TO BE STRONG BUT THE THREAT FOR LARGE HAIL AND HIGH WINDS HAS DIMINISHED SOMEWHAT. LOCALLY HEAVY RAINS HAVE NOW BECOME THE MAIN CONCERN. AS THE SHOWERS AND THUNDERSTORMS CONTINUE TO SPREAD OVER THE SAME GENERAL AREA RAINFALL AMOUNTS OVER NORTHEAST TEXAS AND SOUTHWEST ARKANSAS WILL APPROACH TWO INCHES.
Special weather statement, Apr 12, 2:33 AM CDT, 4 hours 59 minutes before
OKZ040-021-034-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001- 002-003-004-005-006-120830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 225 AM CDT FRI APR 12 1991 ...A SEVERE THUNDERSTORM WATCH REMAINED IN EFFECT UNTIL 300 AM FOR PARTS OF NORTHEAST TEXAS AND SOUTHEAST OKLAHOMA.... ...A FLASH FLOOD WATCH REMAINED IN EFFECT FOR SOUTHWEST ARKANSAS... AT 220 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED SCATTERED SHOWERS AND THUNDERSTORMS THAT EXTENDED WEST OF A LINE FROM FORDYCE ARKANSAS TO JUNCTION CITY ARKANSAS TO NEAR ARCADIA LOUISIANA TO STONEWALL LOUISIANA TO NEAR CENTER TEXAS. THE RAIN EXTENDED NORTHWEST OF THIS LINE SOME 150 MILES. WITHIN THIS LARGE AREA...THUNDERSTORMS THAT WERE PRODUCING GUSTY WINDS AND HEAVY RAINS WERE NOTED FROM 5 MILES NORTHEAST OF TEXARKANA TO 15 MILES SOUTHWEST OF TEXARKANA TEXAS...ALSO NEAR FOUKE ARKANSAS...SOUTHWEST OF EL DORADO ARKANSAS...NORTHWEST OF MINDEN LOUISIANA AND FROM CADDO LAKE TO BETHANY LOUISIANA. MOVEMENT WAS NORTHEAST NEAR 30 MILES AN HOUR. . ANOTHER STRONG THUNDERSTORM WAS LOCATED NEAR CLARKSVILLE TEXAS. ALONG WITH THE GUSTY WINDS AND HEAVY RAINS...FREQUENT LIGHTNING WILL ACCOMPANY THE STORMS. THE SHOWERS AND THUNDERSTORMS OVER NORTHEAST TEXAS WILL CONTINUE TO BE STRONG BUT THE THREAT FOR LARGE HAIL AND HIGH WINDS HAS DIMINISHED. THE STORMS ALONG THE LOUISIANA/TEXAS BORDER SECTIONS AND SOUTHWEST ARKANSAS WILL CONTINUE TO INTENSIFY. HEAVY RAINS WILL CONTINUE TO AFFECT THE AREA. AS THE SHOWERS AND THUNDERSTORMS CONTINUE TO SPREAD THE SAME GENERAL AREA RAINFALL AMOUNTS OVER NORTHEAST TEXAS AND SOUTH- WEST ARKANSAS WILL APPROACH THREE INCHES.
Special weather statement, Apr 12, 3:14 AM CDT, 4 hours 18 minutes before
OKZ040-021-034-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001- 002-003-004-005-006-120930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 310 AM CDT FRI APR 12 1991 ...A FLASH FLOOD WATCH REMAINED IN EFFECT FOR SOUTHWEST ARKANSAS... AT 305 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED SCATTERED SHOWERS AND THUNDERSTORMS THAT EXTENDED NORTHWEST OF A LINE FROM MONTICELLO ARKANSAS TO JUNCTION CITY ARKANSAS TO HOMER LOUISIANA TO MANSFIELD LOUISIANA TO NEAR CENTER TEXAS. THE RAIN EXTENDED NORTHWEST OF THIS LINE SOME 150 MILES. WITHIN THIS LARGE AREA...THUNDERSTORMS THAT WERE PRODUCING GUSTY WINDS AND HEAVY RAINS WERE NOTED FROM NEAR TEXARKANA ARKANSAS TO NEAR HUGHES SPRINGS TEXAS...ALSO NEAR VIVIAN LOUISIANA AND FROM BENTON LOUISIANA TO TIMPSON TEXAS. MOVEMENT WAS NORTHEAST NEAR 30 MILES AN HOUR. ANOTHER 20 MILE WIDE AREA OF SHOWERS HAD DEVELOPED FROM NEAR SICILY ISLAND LOUISIANA ACROSS CALHOUN TO NEAR BERNICE LOUISIANA. . OTHER SHOWERS AND THUNDERSTORMS WERE NOTED FROM NEAR VAN TEXAS TO NEAR PARIS TEXAS. ALONG WITH THE GUSTY WINDS AND HEAVY RAINS...FREQUENT LIGHTNING WILL ACCOMPANY THE STORMS. THE STORMS ALONG THE LOUISIANA/TEXAS BORDER SECTIONS AND SOUTHWEST ARKANSAS WILL CONTINUE TO INTENSIFY. HEAVY RAINS WILL CONTINUE TO AFFECT THE AREA. AS THE SHOWERS AND THUNDERSTORMS CONTINUE TO SPREAD OVER THE SAME GENERAL AREA RAINFALL AMOUNTS OVER NORTHEAST TEXAS AND SOUTHWEST ARKA%NSAS WILL APPROACH THREE INCHES IN SOME LOCATIONS.
Special weather statement, Apr 12, 5:02 AM CDT, 2 hours 30 minutes before
OKZ040-021-034-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001- 002-003-004-005-006-121100- SPECIAL WEATHER AND FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 455 AM CDT FRI APR 12 1991 ...A SEVERE THUNDERSTORM WARNING REMAINED IN EFFECT FOR CADDO AND BOSSIER PARISHES UNTIL 530 AM...A FLASH FLOOD WARNING REMAINED IN EFFECT FOR EASTERN BOWIE AND NORTHWESTERN MILLER COUNTIES UNTIL 645 AM AND FOR CADDO...BOSSIER...DE SOTO AND WEBSTER PARISHES UNTIL 745 AM... ...A FLASH FLOOD WATCH REMAINED IN EFFECT FOR SOUTHWEST ARKANSAS... AT 450 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED SCATTERED SHOWERS AND THUNDERSTORMS THAT EXTENDED NORTHWEST OF A LINE FROM JUNCTION CITY ARKANSAS TO HOMER LOUISIANA TO MANY LOUISIANA. THE RAIN EXTENDED NORTHWEST OF THIS LINE SOME 125 MILES. WITHIN THIS LARGE AREA...POSSIBLE SEVERE THUNDERSTORMS WERE LOCATED OVER NORTH SHREVEPORT AND SOUTH OF BENTON LOUISIANA. OTHER STRONG THUNDERSTORMS WERE NOTED FROM NEAR MANSFIELD LOUISIANA TO NEAR SPRINGHILL LOUISIANA ALSO FROM NEAR CANFIELD ARKANSAS TO NEAR BETHANY LOUISIANA. OTHER THUNDERSTORMS THAT WERE PRODUCING GUSTY WINDS AND HEAVY RAINS WERE NOTED FROM LAKE O THE PINES IN NORTHEAST TEXAS ACROSS TEXARKANA TO NEAR CAMDEN ARKANSAS. MOVEMENT WAS NORTHEAST NEAR 30 MILES AN HOUR. ANOTHER BAND OF SHOWERS AND THUNDERSTORMS...ABOUT 25 MILES WIDE... EXTENDED FROM NEAR ST JOSEPH LOUISIANA ACROSS BASTROP LOUISIANA TO FORDYCE ARKANSAS. DURING THE PAST HALF HOUR...WIND GUSTS TO 63 MILE AN HOUR OCCURRED IN SHREVEPORT LOUISIANA ALONG WITH 1/2 HAIL. THE STORMS ALONG THE LOUISIANA/TEXAS BORDER SECTIONS AND SOUTHWEST ARKANSAS CONTINUED TO INTENSIFY. HEAVY RAINS WILL COgNTINUE TO AFFECT THE AREA. AS THE SHOWERS AND THUNDERSTORMS CONTINUE TO SPREAD OVER THE SAME GENERAL AREA RAINFALL AMOUNTS OVER NORTHEAST TEXAS AND SOUTHWEST ARKANSAS AS WELL AS NORTHWEST LOUISIANA WILL APPROACH THREE INCHES IN SOME LOCATIONS.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 12, 4:32 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 58 min |
| Apr 12, 4:42 AM CDT | Flash Flood Warning | SHV | Caddo, De Soto | 3 hr |
| Apr 12, 4:42 AM CDT | Flash Flood Warning | SHV | Bossier, Webster | 3 hr |
| Apr 12, 5:42 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Webster | 63 min |
| Apr 12, 6:43 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Webster | 62 min |
| Apr 12, 7:00 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 60 min |
| Apr 12, 7:20 AM CDT | Flash Flood Warning | SHV | Bossier, Webster | 115 min |
| Apr 12, 7:20 AM CDT | Flash Flood Warning | SHV | Caddo | 115 min |
| Apr 12, 7:57 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Webster | 63 min |
| Apr 12, 7:57 AM CDT | Severe Thunderstorm Warning | SHV | Caddo | 63 min |
| Apr 12, 8:55 AM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Caddo, Webster | 3 hr |
| Apr 12, 8:55 AM CDT | Flash Flood Warning | SHV | De Soto | 3 hr |
| Apr 12, 8:55 AM CDT | Flash Flood Warning | SHV | Claiborne | 3 hr |
| Apr 12, 10:11 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Webster | 64 min |
| Apr 12, 11:05 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 55 min |
| Apr 12, 11:50 AM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Claiborne, Webster | 3 hr |
| Apr 12, 11:50 AM CDT | Flash Flood Warning | SHV | Caddo | 3 hr |
| Apr 12, 11:50 AM CDT | Flash Flood Warning | SHV | De Soto | 3 hr |
| Apr 12, 12:03 PM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Webster | 87 min |
Nearby
Tornado Warnings in Louisiana, 1991Every tornado warning in 1991Tornadoes in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.