Alert archive / Louisiana / Tornado Warnings in 1990
Tornado Warning 36, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Dec 21, 1990, 4:03 PM CST for Tensas 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
- Dec 21, 1990, 4:03 PM CST (22:03 UTC)
- Expired
- Dec 21, 1990, 5:00 PM CST
- In force
- 57 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
County Tensas 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 |
|---|---|---|---|
| Dec 21, 4:25 PM CST | Tornado F3 | Tensas, 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
Jackson, MS (KJAN), launched 12:00Z, 10.1 hours before the alert went out and 124 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
- 572 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSHV 212205 TORSHV LAC107-212300- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 403 PM CST FRI DEC 21 1990 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 500 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS.. IN NORTHEAST LOUISIANA ...TENSAS PARISH AT 4 PM THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT INDICATED A POSSIBLE TORNADO 10 MILES SOUTHWEST OF WATERPROOF LOUISIANA. THIS STORM IS MOVING TO THE EAST NORTHEAST AT 40 MPH. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. IF YOU ARE IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF AVAILABLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THAE LOWEST FLOOR POSSIBLE. AVOID WINDOWS. ABANDON CARS AND MOBILE HOMES FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 12:07 AM CST | Tornado Warning | SHV | Bossier, Caddo | 68 min |
| Dec 21, 12:40 AM CST | Tornado Warning | SHV | Webster | 65 min |
| Dec 21, 12:55 AM CST | Severe Thunderstorm Warning | SHV | East Carroll | 50 min |
| Dec 21, 10:48 AM CST | Severe Thunderstorm Warning | SHV | Bienville | 57 min |
| Dec 21, 11:05 AM CST | Severe Thunderstorm Warning | SHV | Jackson, Lincoln | 55 min |
| Dec 21, 1:08 PM CST | Severe Thunderstorm Warning | SHV | Richland, West Carroll | 67 min |
| Dec 21, 1:08 PM CST | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Ouachita, Winn | 67 min |
| Dec 21, 1:33 PM CST | Severe Thunderstorm Warning | SHV | De Soto | 72 min |
| Dec 21, 1:46 PM CST | Severe Thunderstorm Warning | SHV | East Carroll, Madison | 89 min |
| Dec 21, 1:46 PM CST | Severe Thunderstorm Warning | SHV | Tensas | 89 min |
| Dec 21, 2:02 PM CST | Tornado Warning | SHV | Madison, Tensas | 58 min |
| Dec 21, 2:55 PM CST | Severe Thunderstorm Warning | SHV | Webster | 65 min |
| Dec 21, 3:17 PM CST | Severe Thunderstorm Warning | SHV | Bienville, Red River | 88 min |
| Dec 21, 3:17 PM CST | Severe Thunderstorm Warning | SHV | Franklin, Madison, Tensas | 88 min |
| Dec 21, 5:16 PM CST | Severe Thunderstorm Warning | SHV | Madison, Tensas | 59 min |
| Dec 21, 5:30 PM CST | Severe Thunderstorm Warning | SHV | Natchitoches, Sabine | 60 min |
| Dec 21, 5:30 PM CST | Tornado Warning | SHV | Madison | 60 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.