Alert archive / North Carolina / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 4, NWS Blacksburg, VA

April 15, 1987Davidson County, Guilford County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 15, 1987, 7:13 PM EDT for Davidson County, Guilford County, North Carolina. It was in force for 62 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 15, 1987, 7:13 PM EDT (23:13 UTC)
Expired: Apr 15, 1987, 8:15 PM EDT
In force: 62 min
Issued by: NWS Blacksburg, VA
Area: Whole counties

Counties Davidson 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

Time	Report	Where	Remark
Apr 15, 7:30 PM EDT	Thunderstorm Wind 0	Guilford, NC
Apr 15, 7:45 PM EDT	Hail 1.75	Davidson, 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, 11.2 hours before the alert went out and 18 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 277 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 152313
SVRGSO
NCC057-081-160015-

BULLETIN-IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENSBORO NC
713 PM EDT WED APR 15 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 815 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTH CAROLINA...DAVIDSON...GUILFORD

AT 710 PM EDT RADAR SHOWED SEVERE THUNDERSTORMS IN DAVIDSON COUNTY
NEAR LEXINGTON AND ALSO OVER WESTERN GUILFORD COUNTY. THE STORMS ARE
MOVING NORTH NORTHEAST AT ABOUT 15 MPH.

DAMAGING WINDS...LARGE HAIL..VERY HEAVY DOWNPOURS AND DANGEROUS
LIGHTNING ARE POSSIBLE WITH THESE THUNDERSTORMS.

TORNDOES ARE ALSO POSSIBLE WITH THESE STORMS.
A SEVERE THUNDERSTORM WARNING MEANS SEVERE THUNDERSTORMS HAVE BEEN
SIGHTED OR INDICATED BY RADAR. A SEVERE THUNDERSTORM HAS WINDS STRONGER
THAN 57 MPH OR HAIL 3/4 OF AN INCH OR LARGER.

IF THREATENING WEATHER APPROACHES YOU...TAKE COVER IMMEDIATELY.
REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY
FOR RELAY TO THE NATIONAL WEATHER SERVICE.

RBN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 15, 4:45 PM EDT	Severe Thunderstorm Warning	RNK	Rowan	60 min
Apr 15, 6:00 PM EDT	Severe Thunderstorm Warning	RNK	Davidson, Forsyth	60 min
Apr 15, 6:00 PM EDT	Severe Thunderstorm Warning	RNK	Rowan	60 min
Apr 15, 6:23 PM EDT	Flash Flood Warning	RNK	Davidson, Rowan	4 hr

Nearby

Severe Thunderstorm Warnings in North Carolina, 1987 Every severe thunderstorm warning in 1987

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.