Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 69, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 13, 1999, 9:58 AM CST for Amite County, Mississippi. It was in force for 47 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 13, 1999, 9:58 AM CST (15:58 UTC)
- Expired
- Mar 13, 1999, 10:45 AM CST
- In force
- 47 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Amite County, MS
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 13, 10:30 AM CST | Thunderstorm Wind | Liberty, MS | Thunderstorm winds blew a tree down across a mobile home 4 miles southwest of Liberty along Highway 48. |
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 13, 5:00 AM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 4.0 hours before the alert went out and 145 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 510 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 491 m²/s²
- 0-3 km storm-relative helicity
- 557 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 13, 8:29 AM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee | 46 min |
| Mar 13, 8:50 AM CST | Tornado Warning | LIX | Pointe Coupee | 30 min |
| Mar 13, 9:00 AM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 35 min |
| Mar 13, 9:38 AM CST | Severe Thunderstorm Warning | LIX | East Feliciana, West Feliciana | 32 min |
| Mar 13, 10:07 AM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana | 48 min |
| Mar 13, 10:23 AM CST | Severe Thunderstorm Warning | LIX | Saint Helena | 42 min |
| Mar 13, 11:01 AM CST | Severe Thunderstorm Warning | LIX | Tangipahoa | 34 min |
| Mar 13, 1:07 PM CST | Tornado Warning | LIX | Tangipahoa | 33 min |
| Mar 13, 1:33 PM CST | Tornado Warning | LIX | Washington | 32 min |
| Mar 13, 3:46 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 34 min |
| Mar 13, 4:33 PM CST | Severe Thunderstorm Warning | LIX | Jefferson | 32 min |
| Mar 13, 5:40 PM CST | Severe Thunderstorm Warning | LIX | Plaquemines | 30 min |
| Mar 13, 10:13 AM CST | Tornado Warning | LIX | Amite | 37 min |
| Mar 13, 11:31 AM CST | Severe Thunderstorm Warning | LIX | Pike | 34 min |
| Mar 13, 11:37 AM CST | Severe Thunderstorm Warning | LIX | Walthall | 33 min |
| Mar 13, 12:22 PM CST | Flash Flood Warning | LIX | Pike | 2 hr |
| Mar 13, 2:16 PM CST | Flash Flood Warning | LIX | Pike | 74 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.