Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 73, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Sep 12, 1987, 2:38 PM CDT for Calcasieu Parish, Louisiana. It was in force for 67 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
- Sep 12, 1987, 2:38 PM CDT (19:38 UTC)
- Expired
- Sep 12, 1987, 3:45 PM CDT
- In force
- 67 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Calcasieu 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 |
|---|---|---|---|
| Sep 12, 2:40 PM CDT | Thunderstorm Wind 0 | Calcasieu, LA | |
| Sep 12, 3:06 PM CDT | Thunderstorm Wind 50 | Calcasieu, 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.6 hours before the alert went out and 19 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
- 2935 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 603 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.5
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
Special weather statement, Sep 12, 9:46 AM CDT, 4 hours 52 minutes before
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</html>The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 1:15 PM CDT | Severe Thunderstorm Warning | LCH | Jasper, Tyler | 60 min |
| Sep 12, 1:25 PM CDT | Severe Thunderstorm Warning | LCH | Sabine, San Augustine | 65 min |
| Sep 12, 2:30 PM CDT | Severe Thunderstorm Warning | LCH | Jefferson, Orange | 30 min |
| Sep 12, 3:21 PM CDT | Severe Thunderstorm Warning | LCH | Cameron | 54 min |
| Sep 12, 3:45 PM CDT | Severe Thunderstorm Warning | LCH | Calcasieu, Jefferson Davis | 60 min |
| Sep 12, 3:59 PM CDT | Tornado Warning | LCH | Acadia | 61 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.