Alert archive / South Carolina / Flash Flood Warnings in 2020

Flash Flood Warning 8, NWS Columbia, SC

June 24, 2020Lancaster County, South Carolina

NWS Columbia, SC issued this flash flood warning at Jun 24, 2020, 6:46 PM EDT for Lancaster County, South Carolina. It was in force for 119 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
Jun 24, 2020, 6:46 PM EDT (22:46 UTC)
Expired
Jun 24, 2020, 8:45 PM EDT
In force
119 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

County Lancaster County, SC

The radar

The Columbia radar (KCAE), 90 km from the middle of the area, began a volume at 22:45 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

Charleston AFB, SC (KCHS), launched 12:00Z, 10.8 hours before the alert went out and 209 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, Charleston AFB, SC at 12:00Z on 2020-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 483 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, Charleston AFB, SC at 12:00Z on 2020-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
483 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
940 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
57 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
Jun 24, 4:10 PM EDTFlash Flood WarningCAELexington, Richland85 min
Jun 24, 5:05 PM EDTSpecial Weather StatementCAEMcCormick40 min
Jun 24, 5:24 PM EDTSpecial Weather StatementCAECalhoun36 min
Jun 24, 5:58 PM EDTSpecial Weather StatementCAECalhoun32 min
Jun 24, 6:10 PM EDTAreal Flood AdvisoryCAELancaster36 min
Jun 24, 6:20 PM EDTAreal Flood AdvisoryCAEChesterfield3 hr
Jun 24, 6:33 PM EDTSpecial Weather StatementCAEAiken42 min
Jun 24, 5:37 PM EDTSpecial Weather StatementCAEColumbia, McDuffie53 min
Jun 24, 6:55 PM EDTSpecial Weather StatementCAEBurke35 min
Jun 24, 7:49 PM EDTSpecial Weather StatementCAEBurke41 min

Nearby

Flash Flood Warnings in South Carolina, 2020Every flash flood 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.