Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 502, NWS Jackson, MS

May 29, 1999Yazoo County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 29, 1999, 4:26 PM CDT for Yazoo County, Mississippi. It was in force for 49 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
May 29, 1999, 4:26 PM CDT (21:26 UTC)
Expired
May 29, 1999, 5:15 PM CDT
In force
49 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Yazoo County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.4 hours before the alert went out and 59 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 1999-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 346 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 1999-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
346 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
956 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
44 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
May 28, 7:05 PM CDTSevere Thunderstorm WarningJANJones35 min
May 28, 7:41 PM CDTSevere Thunderstorm WarningJANJasper, Jones49 min
May 28, 8:08 PM CDTSevere Thunderstorm WarningJANCovington47 min
May 28, 8:13 PM CDTSevere Thunderstorm WarningJANClarke62 min
May 28, 8:20 PM CDTSevere Thunderstorm WarningJANSmith50 min
May 28, 9:53 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Lamar47 min
May 29, 1:52 PM CDTFlash Flood WarningJANWashington2 hr
May 29, 2:39 PM CDTSevere Thunderstorm WarningJANCopiah31 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1999Every severe thunderstorm warning in 1999

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.