Alert archive / Mississippi / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 274, NWS Jackson, MS

June 29, 1994Copiah County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 29, 1994, 12:33 PM CDT for Copiah County, Mississippi. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jun 29, 1994, 12:33 PM CDT (17:33 UTC)
Expired
Jun 29, 1994, 1:15 PM CDT
In force
42 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Copiah County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 5.6 hours before the alert went out and 61 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 1994-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3507 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 1994-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.193958Sfc1 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
3507 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

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 29, 7:43 AM CDTSevere Thunderstorm WarningJANTallahatchie62 min
Jun 29, 8:37 AM CDTSevere Thunderstorm WarningJANSunflower38 min
Jun 29, 10:50 AM CDTSevere Thunderstorm WarningJANHolmes, Humphreys40 min
Jun 29, 10:57 AM CDTSevere Thunderstorm WarningJANYazoo48 min
Jun 29, 12:57 PM CDTSevere Thunderstorm WarningJANLawrence48 min
Jun 29, 1:13 PM CDTSevere Thunderstorm WarningJANJasper, Jones62 min
Jun 29, 1:59 PM CDTSevere Thunderstorm WarningJANClarke, Wayne61 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1994Every severe thunderstorm warning in 1994

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.