Alert archive / Louisiana / Tornado Warnings in 1990
Tornado Warning 12, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Apr 27, 1990, 8:32 PM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 58 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
- Apr 27, 1990, 8:32 PM CDT (01:32 UTC)
- Expired
- Apr 27, 1990, 9:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Bossier Parish, LA, Caddo 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 |
|---|---|---|---|
| Apr 27, 8:36 PM CDT | Tornado F1 | Bossier, 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, 1.5 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
- 1368 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1155 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 280132 TORSHV LAC015-017-280230- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 832 PM CDT FRI APR 27 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 930 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHWEST LOUISIANA ...BOSSIER PARISH...CADDO PARISH AT 830 PM CDT WEATHER SERVICE IN SHREVEPORT SHOWED A POSSIBEL TORNADO OVER NORTHERN SHREVEPORT LOUISIANA MOVING EAST AT 15 MPH INTO WESTERN BOSSIER PARISH OVER NORTH BOSSIER CITY. IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR. GET TO A BASEMENT IF ONE IS AVAILABLE. MAVOID WINDOWS AND PROTECT YOUR BODY FROM FLYING DEBRIS WITH CUSHIONS...BLANKETS...OR PILLOWS.
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 27, 2:51 PM CDT, 5 hours 41 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-272100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 250 PM CDT THU APR 26 1990 ...SHOWERS AND THUNDERSTORMS DEVELOP OVER PARTS OF SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS... AT 245 PM CDT...NATIONAL WEATHER SERVICE RADAR AT SHREVEPORT INDICATED A DEVELOPING BAND OF SHOWERS AND THUNDERSTORMS OVER SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS. THE BAND OF SHOWERS AND THUNDERSTORMS WAS 15 MILES WIDE AND EXTENDED FROM VANDERVOORT ARKANSAS SOUTHWESTWARD TO IDABEL OKLAHOMA TO PITTSBURG TEXAS. MOVEMENT WAS NORTHEAST AT 20 MILES AN HOUR. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING BRIEF GUSTY WINDS..LOCALLY HEAVY RAINFALL..DANGEROUS LIGHTNING AND SMALL HAIL. AS THE AFTERNOON PROGRESSES THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP SOUTH AND SOUTHWESTWARD ACROSS EAST TEXAS. THE AREA OF SHOWERS AND THUNDERSTORMS WILL MOVE SLOWLY -EASTWARD ACROSS THE ARKLATEX THIS EVENING AND TONIGHT AND A FEW SEVERE STORMS CAN BE EXPECTED. A TORNADO WATCH WILL BE IN EFFECT AFTER 315 PM CDT FOR PARTS OF NORTH CENTRAL TEXAS AND ALL OF EAST TEXAS.
Special weather statement, Apr 27, 2:55 PM CDT, 5 hours 37 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002- 003-004-005-006-272100- SPECIAL WEATHER STATEMENT...CORRECTED FOR DATE... NATIONAL WEATHER SERVICE SHREVEPORT LA 250 PM CDT FRI APR 27 1990 ...SHOWERS AND THUNDERSTORMS DEVELOP OVER PARTS OF SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS... AT 245 PM CDT...NATIONAL WEATHER SERVICE RADAR AT SHREVEPORT INDICATED A DEVELOPING BAND OF SHOWERS AND THUNDERSTORMS OVER SOUTHEAST OKLAHOMA AND NORTHEAST TEXAS. THE BAND OF SHOWERS AND THUNDERSTORMS WAS 15 MILES WIDE AND EXTENDED FROM VANDERVOORT ARKANSAS SOUTHWESTWARD TO IDABEL OKLAHOMA TO PITTSBURG TEXAS. MOVEMENT WAS NORTHEAST AT 20 MILES AN HOUR. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING BRIEF GUSTY WINDS..LOCALLY HEAVY RAINFALL..DANGEROUS LIGHTNING AND SMALL HAIL. AS THE AFTERNOON PROGRESSES THE SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP SOUTH AND SOUTHWESTWARD ACROSS EAST TEXAS. THE AREA OF SHOWERS AND THU;NDERSTORMS WILL MOVE SLOWLY EASTWARD ACROSS THE ARKLATEX THIS EVENING AND TONIGHT AND A FEW SEVERE STORMS CAN BE EXPECTED. A TORNADO WATCH WILL BE IN EFFECT AFTER 315 PM CDT FOR PARTS OF NORTH CENTRAL TEXAS AND ALL OF EAST TEXAS.
Local storm report, Apr 27, 5:36 PM CDT, 2 hours 56 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
530 PM CDT FRI APR 27 1990
REPORTS FOR APRIL 27 1990
CNTY/PARISH ST TIME CDT EVENT
CASS TX 445 PM GOLF BALL SIZE HAIL OCCURRED WEST
OF LINDEN TEXAS.
CASS TX 455 PM MARBLE SIZE HAIL OCCURRED LINDEN-
AVENGER TEXAS.
CASS TX 516 PM 3/4 INCH SIZE HAIL COVERED THE GRbOUND
ALONG HIGHWAY 59 SOUTH OF LINDEN TEXAS.
NOTE: THIS STORM HAS CYCLES OF PRODUCING SMALL HAIL THEN LARGE HAIL.The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:23 PM CDT | Tornado Warning | SHV | Bossier, Caddo | 67 min |
| Apr 27, 7:38 PM CDT | Tornado Warning | SHV | De Soto | 97 min |
| Apr 27, 8:05 PM CDT | Tornado Warning | SHV | Sabine | 85 min |
| Apr 27, 8:42 PM CDT | Tornado Warning | SHV | Bienville, Red River, Webster | 63 min |
| Apr 27, 8:51 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches | 69 min |
| Apr 27, 9:20 PM CDT | Severe Thunderstorm Warning | SHV | Claiborne, Lincoln | 55 min |
| Apr 27, 9:20 PM CDT | Severe Thunderstorm Warning | SHV | Jackson, Winn | 55 min |
| Apr 27, 10:47 PM CDT | Severe Thunderstorm Warning | SHV | Franklin, Madison, Tensas | 58 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.