Alert archive / North Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 104, NWS Raleigh, NC

May 20, 1998Randolph County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 20, 1998, 6:06 PM EDT for Randolph County, North Carolina. It was in force for 34 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 20, 1998, 6:06 PM EDT (22:06 UTC)
Expired
May 20, 1998, 6:40 PM EDT
In force
34 min
Issued by
NWS Raleigh, NC
Area
Whole counties

County Randolph County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.1 hours before the alert went out and 42 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.

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 20, 4:13 PM EDT, 1 hour 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
413 PM EDT WED MAY 20 1998

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0355 PM    GREENSBORO                NC   1.75 INCH HAIL
05/20/98   GUILFORD                       GUILFORD COUNTY EMS
                                          REPORTED GOLFBALL SIZE
                                          HAIL ON MOUNT HOPE CHURCH
                                          ROAD IN SOUTHEAST GUILFORD
                                          COUNTY

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 3:32 PM EDTSevere Thunderstorm WarningRAHGuilford33 min
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, 6:11 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; the sounding from the Mesonet's radiosonde archive.