Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 162, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Dec 14, 1987, 7:15 PM CST for Jackson Parish, Louisiana. It was in force for 60 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 14, 1987, 7:15 PM CST (01:15 UTC)
- Expired
- Dec 14, 1987, 8:15 PM CST
- In force
- 60 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
County Jackson 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 14, 7:30 PM CST | Thunderstorm Wind 0 | Jackson, 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, 1.3 hours before the alert went out and 233 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
- 1492 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 820 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 253 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 8.8
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 |
|---|---|---|---|---|
| Dec 14, 7:15 PM CST | Severe Thunderstorm Warning | SHV | Lincoln, Ouachita, Union | 60 min |
| Dec 14, 7:40 PM CST | Severe Thunderstorm Warning | SHV | Caldwell, Winn | 65 min |
| Dec 14, 7:40 PM CST | Severe Thunderstorm Warning | SHV | Morehouse, Richland | 65 min |
| Dec 14, 8:10 PM CST | Severe Thunderstorm Warning | SHV | East Carroll, West Carroll | 65 min |
| Dec 14, 8:10 PM CST | Severe Thunderstorm Warning | SHV | Franklin | 65 min |
| Dec 14, 8:55 PM CST | Severe Thunderstorm Warning | SHV | Madison, Tensas | 50 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.