Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 409, NWS Jackson, MS

June 20, 1998Smith County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 20, 1998, 8:53 PM CDT for Smith County, Mississippi. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 20, 1998, 8:53 PM CDT (01:53 UTC)
Expired
Jun 20, 1998, 9:30 PM CDT
In force
37 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Smith County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.9 hours before the alert went out and 64 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 1998-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3509 joules per kilogram.LCLEL10008507005003002001001 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 1998-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 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
3509 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1658 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
36 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 7:24 PM CDTSevere Thunderstorm WarningJANJones31 min
Jun 20, 7:34 PM CDTSevere Thunderstorm WarningJANSimpson36 min
Jun 20, 7:59 PM CDTSevere Thunderstorm WarningJANJones16 min
Jun 20, 8:08 PM CDTSevere Thunderstorm WarningJANJefferson Davis32 min
Jun 20, 8:53 PM CDTSevere Thunderstorm WarningJANSmith32 min
Jun 20, 9:09 PM CDTSevere Thunderstorm WarningJANCovington36 min
Jun 20, 9:28 PM CDTSevere Thunderstorm WarningJANJasper32 min
Jun 20, 9:49 PM CDTSevere Thunderstorm WarningJANForrest, Lamar36 min
Jun 20, 10:01 PM CDTSevere Thunderstorm WarningJANRankin34 min
Jun 20, 10:29 PM CDTSevere Thunderstorm WarningJANForrest, Lamar31 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1998Every severe thunderstorm warning 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.