Alert archive / Mississippi / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 87
The Storm Prediction Center issued this severe thunderstorm watch at Mar 7, 1998, 12:30 PM CST for 12 parishes in Louisiana; 21 counties in Mississippi. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 7, 1998, 12:30 PM CST (18:30 UTC)
- Expired
- Mar 7, 1998, 6:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Issaquena County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Yazoo County, MS
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 12:35 PM CST | Severe Thunderstorm Warning | JAN | Lincoln | 40 min |
| Mar 7, 12:40 PM CST | Severe Thunderstorm Warning | JAN | Claiborne, Jefferson | 50 min |
| Mar 7, 12:49 PM CST | Tornado Warning | JAN | Jefferson | 41 min |
| Mar 7, 1:04 PM CST | Severe Thunderstorm Warning | JAN | Franklin | 26 min |
| Mar 7, 4:13 PM CST | Severe Thunderstorm Warning | JAN | Concordia | 47 min |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 6.5 hours before the alert went out and 94 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
- 2 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 281 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.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 7, 3:45 AM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 30 more | 6 hr |
| Mar 7, 6:00 AM CST | Severe Thunderstorm Watch | SPC | Caldwell, Catahoula, Concordia, East Carroll, Franklin, LaSalle and 6 more | 5 hr |
| Mar 7, 8:45 AM CST | Tornado Watch | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Grant and 8 more | 5 hr |
| Mar 7, 1:30 PM CST | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 29 more | 6 hr |
| Mar 7, 3:30 PM CST | Tornado Watch | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Concordia, De Soto and 10 more | 4 hr |
Nearby
Severe Thunderstorm Watches in Mississippi, 1998Severe Thunderstorm Watches in Louisiana, 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.