Alert archive / Mississippi / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 460, NWS Jackson, MS

July 9, 1998Attala County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 9, 1998, 6:52 PM CDT for Attala County, Mississippi. It was in force for 33 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
Jul 9, 1998, 6:52 PM CDT (23:52 UTC)
Expired
Jul 9, 1998, 7:25 PM CDT
In force
33 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Attala County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.9 hours before the alert went out and 97 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 12:00Z on 1998-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 837 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 12:00Z on 1998-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
837 J/kg
Mixed-layer CIN
-139 J/kg
Mixed-layer LCL
1067 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
51 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
Jul 9, 3:10 PM CDTSevere Thunderstorm WarningJANOktibbeha50 min
Jul 9, 5:00 PM CDTSevere Thunderstorm WarningJANCarroll, Grenada, Montgomery35 min
Jul 9, 5:08 PM CDTSevere Thunderstorm WarningJANKemper32 min
Jul 9, 5:33 PM CDTSevere Thunderstorm WarningJANCarroll, Montgomery32 min
Jul 9, 5:38 PM CDTSevere Thunderstorm WarningJANLauderdale32 min
Jul 9, 5:56 PM CDTSevere Thunderstorm WarningJANAttala, Choctaw34 min
Jul 9, 6:04 PM CDTSevere Thunderstorm WarningJANCarroll, Leflore46 min
Jul 9, 6:49 PM CDTSevere Thunderstorm WarningJANCarroll, Leflore36 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.