Alert archive / Louisiana / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 77
The Storm Prediction Center issued this severe thunderstorm watch at Mar 5, 1998, 1:30 PM CST for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 5, 1998, 1:30 PM CST (19:30 UTC)
- Expired
- Mar 5, 1998, 7:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 41 counties
Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Columbia County, AR, Hempstead County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Sevier County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Titus County, TX, Upshur County, TX
The radar
The Shreveport radar (KSHV), 89 km from the middle of the area, began a volume at 19:36 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.
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 5, 2:19 PM CST | Severe Thunderstorm Warning | SHV | McCurtain | 61 min |
| Mar 5, 3:18 PM CST | Severe Thunderstorm Warning | SHV | McCurtain | 32 min |
| Mar 5, 3:30 PM CST | Severe Thunderstorm Warning | SHV | Little River | 60 min |
| Mar 5, 3:50 PM CST | Tornado Warning | SHV | Little River | 30 min |
| Mar 5, 4:13 PM CST | Severe Thunderstorm Warning | SHV | Bowie | 47 min |
| Mar 5, 4:21 PM CST | Severe Thunderstorm Warning | SHV | Miller | 64 min |
| Mar 5, 4:49 PM CST | Severe Thunderstorm Warning | SHV | Lafayette | 61 min |
| Mar 5, 5:17 PM CST | Severe Thunderstorm Warning | SHV | Columbia | 63 min |
| Mar 5, 6:00 PM CST | Severe Thunderstorm Warning | SHV | Claiborne | 55 min |
| Mar 5, 6:43 PM CST | Severe Thunderstorm Warning | SHV | Union | 62 min |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 7.5 hours before the alert went out and 85 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
- 896 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 519 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 257 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
Nearby
Severe Thunderstorm Watches in Louisiana, 1998Severe Thunderstorm Watches in Arkansas, 1998Severe Thunderstorm Watches in Texas, 1998Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.