Alert archive / Louisiana / Tornado Warnings in 1990
Tornado Warning 15, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at May 12, 1990, 2:48 AM CDT for De Soto Parish, Louisiana. It was in force for 57 min. 1 report 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
- May 12, 1990, 2:48 AM CDT (07:48 UTC)
- Expired
- May 12, 1990, 3:45 AM CDT
- In force
- 57 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
County De Soto Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 3:01 AM CDT | Tornado F1 | De Soto, 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 00:00Z, 7.8 hours before the alert went out and 88 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
- 263 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 442 m²/s²
- 0-3 km storm-relative helicity
- 773 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 120749 TORSHV LAC031-120845- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 248 AM CDT SAT MAY 12 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 345 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHWEST LOUISIANA ...NORTHERN DESOTO PARISH AT 240 AM CDT THE NATIONAL WEATHER SERVICE RADARS IN SHREVEPORT AND LONGVIEW SHOWED A POSSIBLE TORNADO LOCATED NORTHEAST OF GALLAWAY TEXAS. MOVEMENT WAS EAST NORTHEAST NEAR 40 MPH. 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 SHELTER 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, May 11, 10:04 PM CDT, 4 hours 44 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 1000 PM CDT FRI MAY 11 1990 SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS CONTINUE TO DEVELOP AND RACE NORTHEASTWARD FROM EAST CENTRAL TEXAS ACROSS NORTHEAST TEXAS INTO SOUTHWEST ARKANSAS. THE STORMS WERE MOVING NORTHEAST AT 50 TO 60 MPH AND MAY PRODUCE SPOTTY SMALL HAIL...BRIEF STRONG WIND GUSTS AND HEAVY RAINFALL. THE AREA OF SHOWERS AND ISOLATED THUNDERSTORMS WERE IN A 50 MILE WIDE AREA EXTENDING FROM NEAR GLENWOOD ARKANSAS TO THE TEXARKANA AREA TO THE LONGVIEW AND TYLER AREAS. LOCALIZED HEAVY RAINFALL AMOUNTS WILL OCCUR OVERNIGHT...AND SINCE ALL MAJOR STREAMS ARE IN FLOOD...ALL CREEKS AND BAYOUS ARE IN BACKWATER...THUS ADDITIONAL LOW AREA FLOODING MAY DEVELOP. . THE SHOWERS AND THUNDERSTORMS WILL DISRUPT FLOOD FIGHT ACTIVITIES IN THE RED RIVER VALLEY OF SOUTHWEST ARKANSAS AND THE ADJACENT AREAS OF NORTHEAST TEXAS. LEVEE SYSTEMS ARE BEING TAXED BY THE CREST OF NEAR 32 FEET AT INDEX AND 32.4 AT FULTON AND DOWNSTREAM TO GARLAN CITY.
Special weather statement, May 11, 11:30 PM CDT, 3 hours 18 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 1125 PM CDT FRI MAY 11 1990 NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED TO DEVELOP AND RACE NORTHEAST ACROSS NORTHEAST TEXAS...SOUTHEAST OKLAHOMA... SOUTHWEST ARKANSAS AND EXTREME NORTHWEST LOUISIANA. THE STORMS WERE MOVING NORTHEAST AT 50 TO 60 MILES AN HOUR AND WERE PRODUCING BRIEF STRONG WIND GUSTS AND HEAVY RAINFALL. THE AREA OF SHOWERS AND ISOLATED THUNDERSTORMS EXTENDED NORTHWEST OF A LINE FROM NEAR RISON ARKANSAS TO EL DORADO ARKANSAS TO HOMER LOUISIANA TO WASKOM TEXAS TO HENDERSON TEXAS TO NEAR CROCKETT TEXAS. LOCALIZED HEAVY RAINFALL AMOUNTS WILL OCCUR OVERNIGHT...AND SINCE ALL MAJOR STREAMS ARE IN FLOOD...ALL CREEKS AND BAYOUS ARE IN BACKWATER...THUS ADDITIONAL LOW AREA FLOODING MAY DEVELOP. . THE SHOWERS AND THUNDERSTORMS WILL DISRUPT FLOOD FIGHT ACTIVITIES IN THE RED RIVER VALLEY OF SOUTHWEST ARKANSAS AND THE ADJACENT AREAS OF NORTHEAST TEXAS. LEVEE SYSTEMS ARE BEING TAXED BY THE CREST OF NEAR 32 FEET AT INDEX AND 32.4 AT FULTON AND DOWNSTREAM TO GARLAN CITY. ALSO ..A 50 MILE WIDE AREA OF SCATTERED SHOWERS WAS NOTED FROM NEAR ARCADIA LOUISIANA TO ZWOLLE LOUISIANA TO SOUTH OF LUFKIN TEXAS. AHEAD OF THESE SHOWERS AND THUNDERSTORMS...AN UPPER LEVEL IMPULSE WAS PRODUCING STRONG GUSTY WINDS ACROSS NORTHEAST AND CENTRAL LOUISIANA.
Special weather statement, May 12, 1:21 AM CDT, 1 hour 27 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-120800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 110 AM CDT SAT MAY 12 1990 NUMEROUS SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED TO DEVELOP AND RACE NORTHEAST ACROSS NORTHEAST TEXAS...SOUTHEAST OKLAHOMA... SOUTHWEST ARKANSAS AND NORTHWEST LOUISIANA. THE STORMS WERE MOVING EAST NORTHEAST NEAR 50 MILES AN HOUR AND WERE PRODUCING BRIEF STRONG WIND GUSTS AND HEAVY RAINFALL NEAR ONE INCH. THE AREA OF SHOWERS AND ISOLATED THUNDERSTORMS EXTENDED NORTHWEST OF A LINE FROM NEAR PINE BLUFF ARKANSAS TO NEAR FARMERVILLE LOUISIANA TO CAMPTI LOUISIANA TO SOUTHWEST OF LUFKIN TEXAS. WITHIN THIS AREA A 15 MILE BAND OF THUNDERSTORMS THAT WERE PRODUCING ONE TO TWO INCH RAINS AND STREET AND UNDERPASS FLOODING AS WELL AS GUSTY WINDS WERE NOTED FROM NEAR STAMPS ARKANSAS TO JEFFERSON TEXAS TO HENDERSON TEXAS. . ANOTHER 15 MILE WIDE BAND OF THUNDERSTORMS EXTENDED FROM NEAR HALL SUMMIT LOUISIANA TO NEAR CENTER TEXAS. THESE STORMS WERE LIKELY PRODUCING RAINFALL AMOUNTS NEAR ONE INCH. THE LOCALIZED HEAVY RAINFALL AMOUNTS WILL CONTINUE TO OCCUR OVERNIGHT. ALL MAJOR STREAMS ARE IN FLOOD...ALL CREEKS AND BAYOUS ARE IN BACKWATER SO ADDITIONAL LOW AREA FLOODING WILL DEVELOP. THE SHOWERS AND THUNDERSTORMS WILL DISRUPT FLOOD FIGHT ACTIVITIES IN THE RED RIVER VALLEY OF SOUTHWEST ARKANSAS AND THE ADJACENT AREAS OF NORTHEAST TEXAS. THE LEVEE SYSTEMS WERE BEING TAXED BY THE CREST OF NEAR 32 FEET AT INDEX AND 32.4 AT FULTON AND DOWNSTREAM TO GARLAND CITY. SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP AND AFFECT THE AREA TONIGHT AND SATURDAY. THE ADDITIONAL WATER WILL CAUSE MINOR 7INCREASES IN THE CREST STAGES EXPECTED ON AREA RIVERS AND STREAMS OR AT LEAST PROLONG THE HIGH WATER SITUATION.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 1:57 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 48 min |
| May 12, 2:29 AM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Webster | 61 min |
| May 12, 5:13 AM CDT | Severe Thunderstorm Warning | SHV | Natchitoches | 62 min |
| May 12, 5:57 AM CDT | Severe Thunderstorm Warning | SHV | Winn | 63 min |
| May 12, 8:09 AM CDT | Severe Thunderstorm Warning | SHV | De Soto | 66 min |
| May 12, 8:49 AM CDT | Tornado Warning | SHV | Sabine | 56 min |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | Bossier, Caddo, Red River, Webster | 4 hr |
| May 12, 9:23 AM CDT | Flash Flood Warning | SHV | De Soto, Natchitoches, Sabine | 4 hr |
| May 12, 9:42 AM CDT | Tornado Warning | SHV | Natchitoches | 48 min |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 60 min |
| May 12, 10:45 AM CDT | Severe Thunderstorm Warning | SHV | Ouachita | 60 min |
| May 12, 11:46 AM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto | 59 min |
| May 12, 11:46 AM CDT | Severe Thunderstorm Warning | SHV | Franklin | 59 min |
| May 12, 12:25 PM CDT | Severe Thunderstorm Warning | SHV | Madison, Tensas | 65 min |
| May 12, 12:41 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, De Soto, Red River | 94 min |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Bienville, Bossier, Webster | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | De Soto, Sabine | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Caddo | 4 hr |
| May 12, 1:30 PM CDT | Flash Flood Warning | SHV | Natchitoches, Red River | 4 hr |
| May 12, 1:50 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 55 min |
| May 12, 2:44 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 61 min |
| May 12, 3:08 PM CDT | Flash Flood Warning | SHV | Winn | 2 hr |
| May 12, 3:51 PM CDT | Severe Thunderstorm Warning | SHV | Franklin, Tensas | 69 min |
| May 12, 6:48 PM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto | 57 min |
Nearby
Tornado Warnings in Louisiana, 1990Every tornado warning in 1990Tornadoes in 1990
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.