Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 173, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Jun 21, 1998, 6:24 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 36 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
- Jun 21, 1998, 6:24 PM CDT (23:24 UTC)
- Expired
- Jun 21, 1998, 7:00 PM CDT
- In force
- 36 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Tangipahoa Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 6:25 PM CDT | Thunderstorm Wind | Loranger, LA | Several trees and power lines were downed by an apparent thunderstorm downburst |
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.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 11.4 hours before the alert went out and 80 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
- 2768 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 699 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -64 m²/s²
- 0-3 km storm-relative helicity
- 3 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 New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 12:10 AM CDT | Severe Thunderstorm Warning | LIX | Saint Bernard | 60 min |
| Jun 21, 5:25 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans | 45 min |
| Jun 21, 6:49 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena | 26 min |
| Jun 21, 1:40 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 60 min |
| Jun 21, 4:01 PM CDT | Tornado Warning | LIX | Hancock | 49 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1998Every severe thunderstorm warning in 1998
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.