Alert archive / Virginia / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 15, NWS Blacksburg, VA

April 27, 1989Franklin County, Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 27, 1989, 11:15 AM EDT for Franklin County, Virginia. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Apr 27, 1989, 11:15 AM EDT (15:15 UTC)
Expired
Apr 27, 1989, 11:45 AM EDT
In force
30 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Franklin 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, 3.3 hours before the alert went out and 101 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 1989-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 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 1989-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
207 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
933 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
237 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 10:36 PM EDTSevere Thunderstorm WarningRNKForsyth, Guilford69 min
Apr 27, 4:20 PM EDTSevere Thunderstorm WarningRNKDavie55 min
Apr 27, 4:23 PM EDTSevere Thunderstorm WarningRNKForsyth67 min
Apr 27, 4:50 PM EDTTornado WarningRNKSurry55 min
Apr 27, 5:07 PM EDTTornado WarningRNKForsyth68 min
Apr 27, 5:43 PM EDTTornado WarningRNKForsyth62 min
Apr 27, 5:52 PM EDTTornado WarningRNKCaswell68 min
Apr 27, 7:07 PM EDTTornado WarningRNKForsyth68 min
Apr 27, 4:04 PM EDTSevere Thunderstorm WarningRNKAmherst56 min
Apr 27, 4:27 PM EDTSevere Thunderstorm WarningRNKFranklin33 min

Nearby

Severe Thunderstorm Warnings in Virginia, 1989Every severe thunderstorm warning in 1989

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.