Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 59, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Apr 13, 1987, 4:35 PM CDT for East Carroll Parish, Richland Parish, West Carroll Parish, Louisiana. It was in force for 70 min. 2 reports 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 13, 1987, 4:35 PM CDT (21:35 UTC)
- Expired
- Apr 13, 1987, 5:45 PM CDT
- In force
- 70 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 |
|---|---|---|---|
| Apr 13, 4:55 PM CDT | Thunderstorm Wind 0 | West Carroll, LA | |
| Apr 13, 5:05 PM CDT | Thunderstorm Wind 0 | East 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 12:00Z, 9.6 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
- 750 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 96 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.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Apr 13, 1:01 PM CDT, 3 hours 34 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
100 PM CDT MON APR 13 1987
1140 AM CDT...ROOF DAMAGE...OUTBUILDINGS DAMAGE...SEVERAL TREES
1155 AM BLOWN DOWN IN THE IDABEL AREA OF MCCURTAIN COUwNTY
OKLAHOMA.
ALSO NUMEROUS TREES BLOWN DOWN ACROSS NORTHERN PART
MCCURTAIN COUNTY.The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 12:20 PM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto | 85 min |
| Apr 13, 12:20 PM CDT | Severe Thunderstorm Warning | SHV | Bossier | 85 min |
| Apr 13, 1:25 PM CDT | Tornado Warning | SHV | Bossier, Claiborne, Webster | 75 min |
| Apr 13, 2:10 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Lincoln, Union | 70 min |
| Apr 13, 2:40 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Sabine | 70 min |
| Apr 13, 3:20 PM CDT | Severe Thunderstorm Warning | SHV | Jackson, Morehouse, Ouachita, Union | 80 min |
| Apr 13, 3:20 PM CDT | Severe Thunderstorm Warning | SHV | Winn | 80 min |
| Apr 13, 9:20 AM CDT | Severe Thunderstorm Warning | SHV | Cass, Harrison, Marion | 2 hr |
| Apr 13, 9:20 AM CDT | Severe Thunderstorm Warning | SHV | Gregg, Rusk | 2 hr |
| Apr 13, 10:50 AM CDT | Severe Thunderstorm Warning | SHV | Bowie | 80 min |
| Apr 13, 11:35 AM CDT | Severe Thunderstorm Warning | SHV | Harrison, Marion | 75 min |
| Apr 13, 11:35 AM CDT | Severe Thunderstorm Warning | SHV | Panola, Shelby | 75 min |
| Apr 13, 10:50 AM CDT | Severe Thunderstorm Warning | SHV | Miller | 80 min |
| Apr 13, 11:35 AM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Miller | 75 min |
| Apr 13, 1:15 PM CDT | Severe Thunderstorm Warning | SHV | Columbia, Nevada | 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.