Alert archive / South Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 102, NWS Columbia, SC

May 28, 2020Chesterfield County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at May 28, 2020, 6:25 PM EDT for Chesterfield County, South Carolina. It was in force for 35 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 28, 2020, 6:25 PM EDT (22:25 UTC)
Expired
May 28, 2020, 7:00 PM EDT
In force
35 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Chesterfield County, SC

The radar

The Columbia radar (KCAE), 117 km from the middle of the area, began a volume at 22:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 10.4 hours before the alert went out and 162 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 2020-05-28Temperature 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 2020-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
639 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 27, 8:19 PM EDTAreal Flood WarningCAELancaster13 hr
May 27, 9:21 PM EDTRiver Flood WarningCAEChesterfield, Marlboro5 days
May 28, 11:46 AM EDTRiver Flood WarningCAEKershaw3 days
May 28, 2:09 PM EDTSpecial Weather StatementCAELee51 min
May 28, 2:55 PM EDTAreal Flood AdvisoryCAELancaster3 hr
May 28, 4:19 PM EDTRiver Flood WarningCAEGreenwood, Newberry, Saluda25 hr
May 28, 5:01 PM EDTSpecial Weather StatementCAEMcCormick29 min
May 28, 5:42 PM EDTSpecial Weather StatementCAELancaster48 min
May 28, 5:49 PM EDTSpecial Weather StatementCAEMcCormick26 min
May 28, 6:04 PM EDTAreal Flood AdvisoryCAEChesterfield, Kershaw, Lancaster3 hr
May 28, 7:37 PM EDTSpecial Weather StatementCAEChesterfield38 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2020Every severe thunderstorm warning in 2020

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; radar from the NEXRAD Level II archive.