Alert archive / North Carolina / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 21, NWS Blacksburg, VA

April 29, 1991Surry County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Apr 29, 1991, 6:07 PM EDT for Surry County, North Carolina. It was in force for 53 min.

The area

The counties it named.

The facts

Issued
Apr 29, 1991, 6:07 PM EDT (22:07 UTC)
Expired
Apr 29, 1991, 7:00 PM EDT
In force
53 min
Issued by
NWS Blacksburg, VA
Area
Whole counties

County Surry County, NC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.1 hours before the alert went out and 80 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 1991-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1991-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
141 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 3:49 PM EDTSevere Thunderstorm WarningRNKForsyth, Yadkin56 min
Apr 29, 3:49 PM EDTSevere Thunderstorm WarningRNKRockingham, Stokes56 min
Apr 29, 5:12 PM EDTSevere Thunderstorm WarningRNKAlamance63 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1991Every severe thunderstorm warning in 1991

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.