Alert archive / South Carolina / Areal Flood Advisories in 2021

Areal Flood Advisory 53, NWS Columbia, SC

August 3, 20215 counties in South Carolina

NWS Columbia, SC issued this areal flood advisory at Aug 3, 2021, 8:28 AM EDT for 5 counties in South Carolina. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Aug 3, 2021, 8:28 AM EDT (12:28 UTC)
Expired
Aug 3, 2021, 9:30 AM EDT
In force
62 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

Counties Calhoun County, SC, Lexington County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 32 km from the middle of the area, began a volume at 12:30 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.5 hours before the alert went out and 343 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, Peachtre/Fal Fld, GA at 12:00Z on 2021-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 178 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, Peachtre/Fal Fld, GA at 12:00Z on 2021-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.19395878Sfc1 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
178 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
932 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
15 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
Aug 2, 10:00 PM EDTSpecial Weather StatementCAEOrangeburg30 min
Aug 3, 7:37 AM EDTAreal Flood AdvisoryCAEAiken, Calhoun, Edgefield, Lexington, Orangeburg, Richland and 1 more113 min
Aug 3, 9:32 AM EDTAreal Flood AdvisoryCAECalhoun, Clarendon, Orangeburg, Richland, Sumter118 min
Aug 3, 11:47 AM EDTAreal Flood AdvisoryCAEClarendon, Lee, Sumter58 min

Nearby

Areal Flood Advisories in South Carolina, 2021Every areal flood advisory in 2021

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.