Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 443, NWS Jackson, MS

May 6, 1999Clarke County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 6, 1999, 4:18 AM CDT for Clarke County, Mississippi. It was in force for 47 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 6, 1999, 4:18 AM CDT (09:18 UTC)
Expired
May 6, 1999, 5:05 AM CDT
In force
47 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Clarke County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 9.3 hours before the alert went out and 135 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 1999-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3704 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 1999-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 square meters per square second.1939587897Sfc1 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
3704 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
839 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
293 m²/s²
Significant tornado parameter
7.4
Supercell composite
23.8

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 6, 1:05 AM CDT, 3 hours 13 minutes before
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Special weather statement, May 6, 2:10 AM CDT, 2 hours 8 minutes before
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Special weather statement, May 6, 2:10 AM CDT, 2 hours 8 minutes before
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<body>
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The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 7:06 PM CDTTornado WarningJANHolmes49 min
May 5, 7:15 PM CDTTornado WarningJANCarroll, Leflore50 min
May 5, 7:21 PM CDTSevere Thunderstorm WarningJANGrenada49 min
May 5, 7:31 PM CDTTornado WarningJANHumphreys49 min
May 5, 7:37 PM CDTTornado WarningJANGrenada, Montgomery48 min
May 5, 7:47 PM CDTTornado WarningJANAttala48 min
May 5, 7:49 PM CDTSevere Thunderstorm WarningJANYazoo51 min
May 5, 8:00 PM CDTSevere Thunderstorm WarningJANHolmes50 min
May 5, 8:02 PM CDTSevere Thunderstorm WarningJANCarroll48 min
May 5, 8:05 PM CDTSevere Thunderstorm WarningJANSharkey50 min
May 5, 8:21 PM CDTSevere Thunderstorm WarningJANChoctaw, Montgomery, Webster49 min
May 5, 8:41 PM CDTSevere Thunderstorm WarningJANClay, Oktibbeha49 min
May 5, 8:46 PM CDTSevere Thunderstorm WarningJANHumphreys49 min
May 5, 8:51 PM CDTFlash Flood WarningJANCarroll, Holmes, Humphreys119 min
May 5, 8:51 PM CDTFlash Flood WarningJANIssaquena119 min
May 5, 8:51 PM CDTFlash Flood WarningJANSharkey119 min
May 5, 8:51 PM CDTFlash Flood WarningJANMontgomery119 min
May 5, 8:52 PM CDTSevere Thunderstorm WarningJANIssaquena48 min
May 5, 9:00 PM CDTSevere Thunderstorm WarningJANCarroll, Holmes50 min
May 5, 9:07 PM CDTSevere Thunderstorm WarningJANSharkey48 min
May 5, 9:10 PM CDTSevere Thunderstorm WarningJANMontgomery50 min
May 5, 9:27 PM CDTSevere Thunderstorm WarningJANClay, Lowndes48 min
May 5, 9:34 PM CDTSevere Thunderstorm WarningJANHumphreys, Yazoo46 min
May 5, 9:46 PM CDTSevere Thunderstorm WarningJANHolmes49 min
May 5, 10:32 PM CDTSevere Thunderstorm WarningJANAttala, Holmes, Yazoo48 min
May 5, 10:37 PM CDTSevere Thunderstorm WarningJANMadison48 min
May 5, 10:46 PM CDTSevere Thunderstorm WarningJANHinds49 min
May 5, 11:12 PM CDTSevere Thunderstorm WarningJANOktibbeha48 min
May 5, 11:15 PM CDTSevere Thunderstorm WarningJANLeake, Scott50 min
May 5, 11:15 PM CDTSevere Thunderstorm WarningJANRankin50 min
May 5, 11:16 PM CDTSevere Thunderstorm WarningJANLowndes49 min
May 6, 12:01 AM CDTSevere Thunderstorm WarningJANNeshoba49 min
May 6, 12:14 AM CDTSevere Thunderstorm WarningJANRankin, Simpson51 min
May 6, 12:19 AM CDTSevere Thunderstorm WarningJANCopiah51 min
May 6, 12:25 AM CDTSevere Thunderstorm WarningJANHinds35 min
May 6, 12:26 AM CDTSevere Thunderstorm WarningJANNoxubee49 min
May 6, 12:28 AM CDTSevere Thunderstorm WarningJANScott47 min
May 6, 12:35 AM CDTSevere Thunderstorm WarningJANNewton50 min
May 6, 12:47 AM CDTSevere Thunderstorm WarningJANKemper, Neshoba48 min
May 6, 1:26 AM CDTSevere Thunderstorm WarningJANLauderdale44 min
May 6, 3:02 AM CDTSevere Thunderstorm WarningJANJefferson Davis43 min
May 5, 7:43 PM CDTSevere Thunderstorm WarningJANEast Carroll, West Carroll47 min
May 5, 7:45 PM CDTSevere Thunderstorm WarningJANRichland50 min
May 5, 8:22 PM CDTSevere Thunderstorm WarningJANFranklin48 min
May 5, 8:35 PM CDTSevere Thunderstorm WarningJANEast Carroll, Madison50 min
May 5, 8:35 PM CDTSevere Thunderstorm WarningJANWest Carroll50 min
May 5, 9:05 PM CDTSevere Thunderstorm WarningJANFranklin50 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.