Alert archive / Mississippi / Severe Thunderstorm Watches in 1998

Severe Thunderstorm Watch 79

March 5, 1998Saint Helena Parish, Tensas Parish, Washington Parish, Louisiana; 14 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Mar 5, 1998, 10:15 PM CST for Saint Helena Parish, Tensas Parish, Washington Parish, Louisiana; 14 counties in Mississippi. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Mar 5, 1998, 10:15 PM CST (04:15 UTC)
Expired
Mar 6, 1998, 3:00 AM CST
In force
5 hr
Issued by
the Storm Prediction Center

Counties Saint Helena Parish, LA, Tensas Parish, LA, Washington Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Franklin County, MS, Hancock County, MS, Jefferson County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

Warnings issued inside it

1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 5, 11:13 PM CSTSevere Thunderstorm WarningJANJefferson47 min

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 4.3 hours before the alert went out and 113 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.

Skew-T log-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 1998-03-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 776 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 1998-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
776 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
661 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.0

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Mar 5, 6:45 PM CSTSevere Thunderstorm WatchSPCBienville, Caldwell, Claiborne, East Carroll, Franklin, Jackson and 8 more3 hr
Mar 6, 1:20 PM CSTSevere Thunderstorm WatchSPCAcadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Evangeline and 24 more5 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.