Alert archive / North Carolina / Tornado Warnings in 1998

Tornado Warning 7, NWS Blacksburg, VA

May 7, 1998Caswell County, North Carolina

NWS Blacksburg, VA issued this tornado warning at May 7, 1998, 4:45 PM EDT for Caswell County, North Carolina. It was in force for 30 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 7, 1998, 4:45 PM EDT (20:45 UTC)
Expired
May 7, 1998, 5:15 PM EDT
In force
30 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Caswell County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.8 hours before the alert went out and 62 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 1998-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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 1998-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897Sfc1 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
49 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
523 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
53 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.

219 
WFUS01 KRNK 072046 RRA
TORRNK
NCC033-072115-

BULLETIN--EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BLACKSBURG VA
445 PM EDT THU MAY 7 1998

THE NATIONAL WEATHER SERVICE IN BLACKSBURG HAS ISSUED A

* TORNADO WARNING FOR...
  CASWELL COUNTY IN NORTH CENTRAL NORTH CAROLINA.

* UNTIL 515 PM EDT.

* AT 442 PM EDT... LAW ENFORCEMENT REPORTED A TORNADO 17 MILES
  SOUTHEAST OF DANVILLE OR 3 MILES WEST SOUTHWEST OF LEASBURG
  MOVING NORTHEAST AT 30 MPH.

* THE TORNADO WILL BE IN THE VICINITY OF...
  LEASBURG                        AROUND 445 PM EDT..
  SEMORA                          AROUND 455 PM EDT..

<< CALL TO ACTION >> IF YOU ARE IN THE PATH OF THE TORNADO...THE
SAFEST PLACE IS A BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF
STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SAFETY IN AN
INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS..
. PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.

.END/DOC

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 4:49 PM EDTSevere Thunderstorm WarningRNKWatauga51 min
May 7, 4:52 PM EDTSevere Thunderstorm WarningRNKWilkes63 min
May 7, 5:26 PM EDTSevere Thunderstorm WarningRNKYadkin49 min
May 7, 7:10 PM EDTSevere Thunderstorm WarningRNKStokes20 min

Nearby

Tornado Warnings in North Carolina, 1998Every tornado warning in 1998Tornadoes 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.