Alert archive / North Carolina / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 27, NWS Blacksburg, VA

May 27, 1990Alamance County, Guilford County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at May 27, 1990, 5:58 PM EDT for Alamance County, Guilford County, North Carolina. It was in force for 62 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 27, 1990, 5:58 PM EDT (21:58 UTC)
Expired
May 27, 1990, 7:00 PM EDT
In force
62 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

Counties Alamance County, NC, Guilford County, NC

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
May 27, 6:10 PM EDTHail 1.75Guilford, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.0 hours before the alert went out and 28 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 1990-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 73 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 1990-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
73 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
1020 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
36 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.

000 
TTAA00 KGSO 272158
SVRGSO
NCC001-081-272300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE GREENSBORO NC
558 PM EDT SUN MAY 27 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 700 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE STATE OF NORTH CAROLINA
      ALAMANCE...EASTERN GUILFORD

AT 555 PM RADAR SHOWED A SEVERE THUNDERSTORM 10 MILES NORTHEAST
OF GREENSBORO...NEAR BROWNS SUMMIT MOVING SOUTHEAST AT ABOUT 10
MPH. QUARTER SIZED HAIL HAS BEEN REPORTED WITH THIS STORM.

IF YOU ARE IN AN AREA THREATENED BY THE STORM..GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WINDS..LARGE HAIL..VERY HEAVY
DOWNPOURS AND FREQUENT DEADLY LIGHTNING.

THIS THUNDERSTORM MAY CAUSE THE FLOODING OF SMALL STREAMS..CREEKS..
UNDERPASSES AND LOW LYING ROADWAYS. AVOID DRIVING ACROSS AREAS WHERE
WATER COVERS THE ROADWAY.

 WHB

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 27, 5:02 PM EDTSevere Thunderstorm WarningRNKGuilford, Rockingham58 min
May 27, 7:01 PM EDTSevere Thunderstorm WarningRNKAlamance, Guilford, Randolph59 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1990Every severe thunderstorm warning in 1990

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.