Alert archive / North Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 100, NWS Raleigh, NC

May 20, 1998Guilford County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 20, 1998, 3:32 PM EDT for Guilford County, North Carolina. It was in force for 33 min. 2 reports 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 20, 1998, 3:32 PM EDT (19:32 UTC)
Expired
May 20, 1998, 4:05 PM EDT
In force
33 min
Issued by
NWS Raleigh, NC
Area
Whole counties

County Guilford County, NC

What was reported inside it

TimeReportWhereRemark
May 20, 3:55 PM EDTHail 1.75Greensboro, NC
May 20, 4:15 PM EDTHail 1Guilford, NC

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 nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.5 hours before the alert went out and 10 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, Greensboro/Hi Pt, NC at 12:00Z on 1998-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 68 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, Greensboro/Hi Pt, NC at 12:00Z on 1998-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 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
68 J/kg
Mixed-layer CIN
-336 J/kg
Mixed-layer LCL
1739 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
246 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 Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 4:01 PM EDTSevere Thunderstorm WarningRAHAlamance, Guilford34 min
May 20, 4:16 PM EDTSevere Thunderstorm WarningRAHChatham29 min
May 20, 5:19 PM EDTSevere Thunderstorm WarningRAHRandolph16 min
May 20, 6:06 PM EDTSevere Thunderstorm WarningRAHRandolph34 min
May 20, 6:11 PM EDTSevere Thunderstorm WarningRAHMoore34 min
May 20, 6:46 PM EDTSevere Thunderstorm WarningRAHMoore29 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 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.