Alert archive / North Carolina / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 18, NWS Raleigh, NC

April 2, 1990Wake County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Apr 2, 1990, 9:39 PM EDT for Wake County, North Carolina. It was in force for 51 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
Apr 2, 1990, 9:39 PM EDT (01:39 UTC)
Expired
Apr 2, 1990, 10:30 PM EDT
In force
51 min
Issued by
NWS Raleigh, NC
Area
Whole counties

County Wake 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
Apr 2, 10:00 PM EDTHail 1.75Wake, 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 00:00Z, 1.7 hours before the alert went out and 117 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 00:00Z on 1990-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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 00:00Z on 1990-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 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
2 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
1514 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
157 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 KRDU 030141
SVRRDU
NCC063-135-183-030230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
939 PM EDT MON APR 2 1990
 
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTH CENTRAL NORTH CAROLINA
          ...SOUTHERN DURHAM...SOUTHERN ORANGE...NORTHERN WAKE
 
AT 930 PM EDT WEATHER RADAR SHOWED SEVERE THUNDERSTORMS EXTENDING FROM
NORTHERN CHATHAM COUNTY AND SOUTHERN ORANGE AND SOUTHERN DURHAM
COUNTIES TO NORTHWESTERN WAKE COUNTY. THESE STORMS WERE MOVING TO THE
EAST AT 30 MPH. NUMEROUS REPORTS OF MARBLE SIZE HAIL HAVE BEEN
RECEIVED FROM THESE STORMS. AT 926 PM DURHAM COUNTY SHERIFF DEPUTIES
REPORTED NICKEL SIZED HAIL JUST SOUTHEAST OF DURHAM CITY.
 
PEOPLE IN THE PATH OF THESE STORMS SHOULD BE ALERT FOR LARGE HAIL.
FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTOR

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

Special weather statement, Apr 2, 5:10 PM EDT, 4 hours 29 minutes before
NCZ006-007-030330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
510 PM EDT MON APR 2 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE
NORTHERN FOOTHILLS AND NORTHWEST PIEDMONT OF NORTH CAROLINA...

AT 445 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWS AN AREA OF
THUNDERSTORMS WITH HEAVY RAIN AND PEA SIZE HAIL MOVING THROUGH
SOUTHERN ROCKINGHAM COUNTY...ALONG THE GUILFORD COUNTY LINE. ALL REPORTS
ON THIS THUNDERSTORM HAS IT LEAVING PEA SIZE HAIL IN ITS WAKE. THE
LARGER AREA HAS THUNDERSTORMS AND RAINSHOWERS COVERING ROCKINGHAM
AND MOST OF CASWELL COUNTIES...THIS AREA IS MOVING EAST AT 40 MPH.
OTHER THUNDERSTORMS WITH HEAVY RAIN HAVE DEVELOPED IN NORTHERN
SURRY COUNTY JUST WEST OF MOUNT AIRY. NO MOVEMENT ON THIS STORM YET.
ANOTHER THUNDERSTORM IS BEGINNING TO DEVELOPE IN SOUTHERN WILKES AND
NORTHERN ALEXANDER COUNTIES. MOVEMENT ON THIS STORM IS EAST AT 30 MPH.

PERSONS IN THE SEVERE THUNDERSTORM WATCH AREA SHOULD BE ON THE
LOOKOUT FOR THREATENING WEATHER CONDITIONS AND TAKE APPROPIATE
ACTION IF NECCESSARY.

IF YOU HAVE REPORTS OF HAIL...HIGH WINDS...VERY HEAVY DOWNPOURS OR
ANY TYPE OF SEVERE WEATHER...MAKE THE REPORT TO THE COUNTY SHERIFF
WHO WILL IN TURN FILE THE REPORT WITH THE NATIONAL WEATHER SERVICE.

RJD
Special weather statement, Apr 2, 6:15 PM EDT, 3 hours 24 minutes before
NCZ006-007-030330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
610 PM EDT MON APR 2 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE
NORTHERN FOOTHILLS...NORTHERN MOUNTAINS...AND NORTHWEST PIEDMONT
OF NORTH CAROLINA...

AT 600 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWS A WIDE LINE OF
THUNDERSTORMS AND RAINSHOWERS THAT STRETCHES FROM THE NORTHEAST CORNER OF
STOKES COUNTY ...THROUGH SURRY...FORSYTH...YADKIN...DAVIE...AND
IREDELL COUNTIES.THE HEAVIEST THUNDERSTORMS ARE IN THE NORTHEAST CORNER
STOKES COUNTY AND IN FORSYTH JUST WEST OF WINSTON-SALEM. THE LINE IS
MOVING EAST AT 15 MPH. A THUNDERSTORM WITH HAIL AND  HEAVY RAIN HAS MOVED
OUT OF CASWELL AND ALAMANCE COUNTIES INTO ORANGE COUNTY...THIS STORM
HAS SLOWED TO ABOUT 20 MPH AND HAS INCREASED IN INTENSITY.

PERSONS IN THE SEVERE THUNDERSTORM WATCH AREA THIS EVENING SHOULD BE ON
THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND TAKE APPROPIA5TE
ACTION IF NECESSARY.

RJD
Local storm report, Apr 2, 6:51 PM EDT, 2 hours 48 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH/DURHAM, NC
651 PM EDT MON APR 02 1990

TIME           EVENT

630PM EDT      FOLLOWING REPORTS RECEIVED FROM BASE WEATHER AT FORT
               BRAGG NC IN HO_KE COUNTY.

               3/4 INCH TO 11/2 INCH HAIL REPORTED 4 MILES SW OF FBG

               1 INCH HAIL REPORTED 6 MILES S OF FBG

LBC
Special weather statement, Apr 2, 7:05 PM EDT, 2 hours 34 minutes before
NCZ006-007-030330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
700 PM EDT MON APR 2 1990

SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE
NORTHERN FOOTHILLS...NORTHERN MOUNTAINS...AND NORTHWEST PIEDMONT
OF NORTH CAROLINA.

AT 650 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWS A WIDE LINE OF
THUNDERSTORMS AND RAINSHOWERS MOVING THORUGH THE NORTHWEST PIEDMONT...
THE LINE IS NOW OVER THE PIEDMONT TRIAD INTERNATIONAL AIRPORT. THE
LINE LIES FROM THE NORTHWEST CORNER OF CASWELL COUNTY...THROUGH
ROCKINGHAM...GUILFORD...FORSYTH...DAVIDSON...YADKIN...DAVIE...IREDELL
AND JUST BEGINNING TO ENTER ROWAN COUNTY. THE HEAVIEST THUNDERSTORM
ACTIVITY IS IN THE BROWNS SUMMIT AREA WHERE MARBLE SIZE HAIL HAS BEEN
REPORTED. THE LINE IS MOVING EAST AT 20 MPH.

PERSONS IN THE SEVERE THUNDERSTORM WATCH AREA THIS EVENING SHOULD BE ON
THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND SEEK SHELTER IF
SEVERE WEATHER APPROACHES.k

RJD
Special weather statement, Apr 2, 8:31 PM EDT, 1 hour 8 minutes before
NCZ006-007-030330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
820 PM EDT MON APR 2 1990

SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE
NORTHERN FOOTHILLS...NORTHERN MOUNTAINS...AND NORTHWEST PIEDMONT
OF NORTH CAROLINA.

AT 800 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWS A WIDE LINE OF
THUNDERSTORMS AND RAINSHOWERS MOVING SLOWLY THROUGH THE NORTHWEST
PIEDMONT. IN THE LAST 15 MINUTES THE NORTHERN END OF THIS LINE IN
ALAMANCE...GUILFORD AND RANDOLPH COUNTIES HAS INCREASED IN INTENSITY.
REPORTS OF PEA SIZE TO MARBLE SIZE HAVE BEEN RECIEVED FROM GUILFORD AND
ALAMANCE COUNTIES. THESE THUNDERSTORMS ARE HANGING JUST UNDER THE SEVERE
LEVEL ALL EVENING...WINDS HAVE BEEN LIGHT AND ALSO RAINS HAVE BEEN LIGHT.
OTHER THUNDERSTORMS AND RAINSHOWERS ARE IN FORSYTH...DAVIE...DAVIDSON...
AND ROWAN COUNTIES. THE LINE OF THUNDERSTORMS IS MOVING EAST AT 20 MPH.

ON THE LIGHTER SIDE...THE COMBINATION OF TOWERING CUMULONIMBUS CLOUDS...
RAINSHOWERS...VIVID LIGHTNING AND BLUE SKIES TO WEST MADE FOR A
SPECTAULAR SUNSET.

PERSONS IN THE SEVERE THUNDERSTORM WATCH AREA SHOULD ON LOOKOUT FOR
SEVERE WEATHER THIS EVENING AND BE PREPARED TO TAKE ACTION  IF SEVERE
WEATHER5 APPROACHES.

STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST STATEMENTS AND ANY
POSSIBLE WARNINGS.

RJD
Special weather statement, Apr 2, 9:14 PM EDT, 25 minutes before
NCZ006-007-030330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENSBORO NC
820 PM EDT MON APR 2 1990

THE SEVERE THUNDERSTORM WATCH HAS EXPIRED ACROSS THE NORTHERN
MOUNTAINS...NORTHERN FOOTHILLS...AND NORTHWEST PIEDMONT OF NORTH
CAROLINA...

AT 900 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWS A ILL DEFINED LINE
OF THUNDERSTORMS AND RAINSHOWERS ARE STILL LINGERING IN ALAMANCE AND
RANDOLPH COUNTIES IN THE NORTHWEST PIEDMONT. IN THE NORTHWEST CORNER
OF RANDOLPH COUNTY THERE IS STILL A THUNDERSTORM WHICH MAY PRODUCE
PEA SIZE HAIL BEFORE IT MOVES EAST OUT OF THE COUNTY.

THIS WILL BE THE LAST STATEMENT FROM THIS OFFICE ON THIS WEATHER
EVENT UNLESS CONDITIONS CHANGE AND WARRANT A STATEMlENT OR WARNING.

RJD

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 8:31 PM EDTSevere Thunderstorm WarningRAHFranklin, Granville, Vance59 min
Apr 2, 8:31 PM EDTSevere Thunderstorm WarningRAHDurham, Orange59 min
Apr 2, 8:51 PM EDTTornado WarningRAHFranklin, Vance39 min
Apr 2, 9:08 PM EDTSevere Thunderstorm WarningRAHChatham52 min
Apr 2, 9:39 PM EDTSevere Thunderstorm WarningRAHDurham, Orange51 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.