Alert archive / Georgia / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 59, NWS Charleston, SC

May 4, 1998Effingham County, Georgia

NWS Charleston, SC issued this severe thunderstorm warning at May 4, 1998, 4:00 AM EDT for Effingham County, Georgia. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 4, 1998, 4:00 AM EDT (08:00 UTC)
Expired
May 4, 1998, 4:50 AM EDT
In force
50 min
Issued by
NWS Charleston, SC
Area
Whole counties

County Effingham County, GA

The radar

The Charleston,SC radar (KCLX), 43 km from the middle of the area, began a volume at 08:02 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
May 4, 4:20 AM EDTThunderstorm Wind 50Rincon, GATrees down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 4, 2:30 AM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 8.0 hours before the alert went out and 139 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, Charleston AFB, SC at 00:00Z on 1998-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 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, Charleston AFB, SC at 00:00Z on 1998-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
21 J/kg
Mixed-layer CIN
-216 J/kg
Mixed-layer LCL
1172 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
89 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.

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.

NWS Charleston, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 4, 2:45 AM EDT, 1 hour 15 minutes earlier.

Area forecast discussion, May 4, 2:45 AM EDT, 1 hour 15 minutes before
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In the hours before

Special weather statement, May 4, 1:27 AM EDT, 2 hours 33 minutes before
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Local storm report, May 4, 1:56 AM EDT, 2 hours 4 minutes before
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Special weather statement, May 4, 2:17 AM EDT, 1 hour 43 minutes before
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Special weather statement, May 4, 2:17 AM EDT, 1 hour 43 minutes before
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Local storm report, May 4, 3:30 AM EDT, 30 minutes before
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Local storm report, May 4, 3:30 AM EDT, 30 minutes before
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The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 3, 11:36 PM EDTSevere Thunderstorm WarningCHSJasper59 min
May 3, 11:36 PM EDTSevere Thunderstorm WarningCHSBeaufort59 min
May 4, 12:34 AM EDTSevere Thunderstorm WarningCHSCharleston, Colleton61 min
May 4, 1:23 PM EDTSevere Thunderstorm WarningCHSAllendale32 min
May 4, 1:48 PM EDTSevere Thunderstorm WarningCHSBerkeley47 min
May 4, 2:03 PM EDTSevere Thunderstorm WarningCHSDorchester47 min
May 4, 2:51 PM EDTSevere Thunderstorm WarningCHSBerkeley49 min
May 4, 3:02 PM EDTSevere Thunderstorm WarningCHSColleton33 min
May 4, 3:05 PM EDTSevere Thunderstorm WarningCHSDorchester50 min
May 4, 3:29 PM EDTSevere Thunderstorm WarningCHSCharleston46 min
May 4, 3:41 PM EDTTornado WarningCHSCharleston34 min
May 4, 3:53 PM EDTSevere Thunderstorm WarningCHSBerkeley62 min
May 4, 4:12 PM EDTSevere Thunderstorm WarningCHSCharleston63 min
May 3, 10:21 PM EDTSevere Thunderstorm WarningCHSTattnall49 min
May 3, 10:29 PM EDTSevere Thunderstorm WarningCHSEvans36 min
May 3, 10:43 PM EDTSevere Thunderstorm WarningCHSBryan, Bulloch47 min
May 3, 10:55 PM EDTSevere Thunderstorm WarningCHSLiberty, Long30 min
May 3, 11:21 PM EDTSevere Thunderstorm WarningCHSChatham, Effingham34 min
May 4, 3:07 AM EDTSevere Thunderstorm WarningCHSBulloch, Candler48 min
May 4, 12:48 PM EDTSevere Thunderstorm WarningCHSScreven47 min
May 4, 1:03 PM EDTSevere Thunderstorm WarningCHSTattnall62 min
May 4, 1:52 PM EDTSevere Thunderstorm WarningCHSLiberty, Long63 min
May 4, 1:55 PM EDTSevere Thunderstorm WarningCHSTattnall35 min
May 4, 2:17 PM EDTSevere Thunderstorm WarningCHSBryan48 min
May 4, 2:34 PM EDTSevere Thunderstorm WarningCHSEffingham31 min

Nearby

Severe Thunderstorm Warnings in Georgia, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.