Alert archive / North Carolina / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 48, NWS Raleigh, NC

April 17, 1998Guilford County, Randolph County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Apr 17, 1998, 6:40 PM EDT for Guilford County, Randolph County, North Carolina. It was in force for 60 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
Apr 17, 1998, 6:40 PM EDT (22:40 UTC)
Expired
Apr 17, 1998, 7:40 PM EDT
In force
60 min
Issued by
NWS Raleigh, NC
Area
Whole counties

Counties Guilford County, NC, Randolph County, NC

What was reported inside it

TimeReportWhereRemark
Apr 17, 6:50 PM EDTHail 0.88High Pt, NC
Apr 17, 7:00 PM EDTHail 0.75Randleman, 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, 10.7 hours before the alert went out and 23 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 1998-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 77 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 1998-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 277 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
77 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
277 m²/s²
0-3 km storm-relative helicity
274 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

537 
WUUS1 KRDU 172241 RRA
SVRRDU
NCC081-151-172340-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
640 PM EDT FRI APR 17 1998

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GUILFORD COUNTY
  NORTHERN RANDOLPH COUNTY

* UNTIL 740 PM EDT

* AT 638 PM EDT...NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A SEVERE THUNDERSTORM OVER MIDWAY IN DAVIDSON
  COUNTY ... MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HIGH POINT AROUND 645 PM
  THOMASVILLE AROUND 650 PM
  JAMESTOWN AROUND 650 PM
  VANDALIA AROUND 655 PM
  GREENSBORO AROUND 700 PM

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

JWC

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 5:59 PM EDTFlash Flood WarningRAHForsyth3 hr
Apr 17, 6:05 PM EDTSevere Thunderstorm WarningRAHForsyth60 min
Apr 17, 6:21 PM EDTSevere Thunderstorm WarningRAHDavidson59 min
Apr 17, 6:55 PM EDTTornado WarningRAHGuilford65 min
Apr 17, 7:48 PM EDTSevere Thunderstorm WarningRAHAlamance47 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.