Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 377, NWS Jackson, MS

May 4, 1999Washington County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 4, 1999, 5:32 PM CDT for Washington 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
May 4, 1999, 5:32 PM CDT (22:32 UTC)
Expired
May 4, 1999, 6:05 PM CDT
In force
33 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Washington County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.5 hours before the alert went out and 134 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 1999-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 111 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 1999-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 155 square meters per square second.19395878Sfc1 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
111 J/kg
Mixed-layer CIN
-567 J/kg
Mixed-layer LCL
807 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
155 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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

Local storm report, May 4, 12:40 PM CDT, 4 hours 52 minutes before
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Local storm report, May 4, 12:43 PM CDT, 4 hours 49 minutes before
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Special weather statement, May 4, 3:45 PM CDT, 1 hour 47 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 9:33 AM CDTSevere Thunderstorm WarningJANYazoo47 min
May 4, 9:38 AM CDTSevere Thunderstorm WarningJANHinds, Rankin47 min
May 4, 9:53 AM CDTSevere Thunderstorm WarningJANMadison62 min
May 4, 10:22 AM CDTSevere Thunderstorm WarningJANRankin33 min
May 4, 10:38 AM CDTSevere Thunderstorm WarningJANAttala62 min
May 4, 10:47 AM CDTSevere Thunderstorm WarningJANYazoo33 min
May 4, 10:53 AM CDTSevere Thunderstorm WarningJANMadison32 min
May 4, 11:11 AM CDTSevere Thunderstorm WarningJANLeake49 min
May 4, 11:14 AM CDTSevere Thunderstorm WarningJANNeshoba51 min
May 4, 11:17 AM CDTSevere Thunderstorm WarningJANRankin33 min
May 4, 11:19 AM CDTSevere Thunderstorm WarningJANHolmes51 min
May 4, 11:24 AM CDTSevere Thunderstorm WarningJANScott51 min
May 4, 11:28 AM CDTSevere Thunderstorm WarningJANClarke, Lauderdale62 min
May 4, 11:56 AM CDTSevere Thunderstorm WarningJANLeake, Neshoba49 min
May 4, 11:59 AM CDTSevere Thunderstorm WarningJANWinston21 min
May 4, 12:22 PM CDTSevere Thunderstorm WarningJANCarroll33 min
May 4, 12:57 PM CDTSevere Thunderstorm WarningJANChoctaw33 min
May 4, 2:35 PM CDTSevere Thunderstorm WarningJANClay35 min
May 4, 3:05 PM CDTSevere Thunderstorm WarningJANLowndes35 min
May 4, 4:31 PM CDTSevere Thunderstorm WarningJANMarion34 min
May 4, 6:05 PM CDTSevere Thunderstorm WarningJANWashington35 min
May 4, 6:38 PM CDTSevere Thunderstorm WarningJANLeflore47 min
May 4, 4:27 PM CDTSevere Thunderstorm WarningJANWest Carroll33 min
May 4, 4:43 PM CDTSevere Thunderstorm WarningJANChicot47 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.