Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 28, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Feb 28, 1987, 5:10 AM CST for East Carroll Parish, Richland Parish, West Carroll Parish, Louisiana. It was in force for 85 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
- Feb 28, 1987, 5:10 AM CST (11:10 UTC)
- Expired
- Feb 28, 1987, 6:35 AM CST
- In force
- 85 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties East Carroll Parish, LA, Richland Parish, LA, West Carroll 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 |
|---|---|---|---|
| Feb 28, 5:15 AM CST | Tornado F2 | West Carroll, 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 00:00Z, 11.2 hours before the alert went out and 137 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
- 6 J/kg
- Mixed-layer CIN
- -131 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 250 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 28, 1:50 AM CST | Severe Thunderstorm Warning | SHV | Franklin, Tensas | 70 min |
| Feb 28, 2:00 AM CST | Severe Thunderstorm Warning | SHV | De Soto, Sabine | 75 min |
| Feb 28, 2:20 AM CST | Severe Thunderstorm Warning | SHV | Madison | 55 min |
| Feb 28, 3:40 AM CST | Severe Thunderstorm Warning | SHV | Jackson, Lincoln | 70 min |
| Feb 28, 3:40 AM CST | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 70 min |
| Feb 28, 4:55 AM CST | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Ouachita, Winn | 65 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1987Every severe thunderstorm warning in 1987
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.