Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 50, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 2, 1999, 11:57 PM CST for Jackson County, Mississippi. It was in force for 33 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
- Mar 2, 1999, 11:57 PM CST (05:57 UTC)
- Expired
- Mar 3, 1999, 12:30 AM CST
- In force
- 33 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Jackson County, MS
The radar
The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 05:56 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 3, 12:10 AM CST | Thunderstorm Wind | Helena, MS | Thunderstorm winds damaged the roof of a church and blew down its steeple, overturned a travel trailer, and knocked down a few trees.. A pickup truck and carport were damaged by a falling tree. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 2, 11:15 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 6.0 hours before the alert went out and 106 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
- 698 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 984 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
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 |
|---|---|---|---|---|
| Mar 2, 8:25 PM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 60 min |
| Mar 2, 8:25 PM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee | 60 min |
| Mar 2, 9:23 PM CST | Severe Thunderstorm Warning | LIX | East Feliciana, Saint Helena | 47 min |
| Mar 2, 9:38 PM CST | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 47 min |
| Mar 2, 9:47 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge | 28 min |
| Mar 2, 9:54 PM CST | Severe Thunderstorm Warning | LIX | Livingston | 46 min |
| Mar 2, 10:07 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Assumption | 48 min |
| Mar 2, 10:34 PM CST | Severe Thunderstorm Warning | LIX | Lafourche, Saint James, Saint John the Baptist | 46 min |
| Mar 2, 10:34 PM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 46 min |
| Mar 2, 10:40 PM CST | Severe Thunderstorm Warning | LIX | Livingston | 35 min |
| Mar 2, 11:05 PM CST | Severe Thunderstorm Warning | LIX | Lafourche, Saint Charles | 45 min |
| Mar 2, 11:26 PM CST | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines | 49 min |
| Mar 2, 11:37 PM CST | Severe Thunderstorm Warning | LIX | Saint Bernard | 53 min |
| Mar 2, 11:51 PM CST | Tornado Warning | LIX | Plaquemines, Saint Bernard | 29 min |
| Mar 3, 12:08 AM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 37 min |
| Mar 3, 12:23 AM CST | Severe Thunderstorm Warning | LIX | Plaquemines | 32 min |
| Mar 3, 12:25 AM CST | Tornado Warning | LIX | Saint Bernard | 25 min |
| Mar 2, 8:50 PM CST | Severe Thunderstorm Warning | LIX | Amite | 40 min |
| Mar 2, 9:14 PM CST | Severe Thunderstorm Warning | LIX | Pike | 31 min |
| Mar 2, 9:29 PM CST | Severe Thunderstorm Warning | LIX | Walthall | 61 min |
| Mar 2, 10:56 PM CST | Tornado Warning | LIX | Hancock, Pearl River | 34 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.