Alert archive / Virginia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 62, NWS Blacksburg, VA

September 7, 1990Bedford County, Campbell County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Sep 7, 1990, 3:52 PM EDT for Bedford County, Campbell County, Virginia. It was in force for 68 min.

The area

The counties it named.

The facts

Issued
Sep 7, 1990, 3:52 PM EDT (19:52 UTC)
Expired
Sep 7, 1990, 5:00 PM EDT
In force
68 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

Counties Bedford County, VA, Campbell County, VA

The radar

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.9 hours before the alert went out and 141 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 1990-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 737 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 1990-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 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
737 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1456 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Sep 7, 2:24 PM EDT, 1 hour 28 minutes before
VAZ013-014-071930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ROANOKE VA
215 PM EDT FRI SEP 07 1990

...THUNDERSTORMS MOVING INTO WESTCENTRAL VIRGINIA...

AT 2 PM EDT RADAR SHOWED A LINE OF THUNDERSTORMS OVER EASTERN
WEST VIRGINIA IS MOVING INTO NORTHEASTERN GILES CRAIG AND BOTETOURT
COUNTIES IN WESTCENTRAL VIRGINIA WITHIN THE HOUR.

THESE STORMS ARE CAPABLE OF PRODUCING HEAVY DOWNPOURS STRONG GUSTY
WINDS DANGEROUS LIGHTNING AND POSSIBLE HAIL.

IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY.
CG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 3:26 PM EDTSevere Thunderstorm WarningRNKAmherst, Bedford64 min
Sep 7, 4:17 PM EDTSevere Thunderstorm WarningRNKHalifax, Pittsylvania118 min

Nearby

Severe Thunderstorm Warnings in Virginia, 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; the sounding from the Mesonet's radiosonde archive.