Alert archive / South Carolina / Areal Flood Advisories in 2011

Areal Flood Advisory 13, NWS Columbia, SC

July 6, 2011Orangeburg County, South Carolina

NWS Columbia, SC issued this areal flood advisory at Jul 6, 2011, 4:50 PM EDT for Orangeburg County, South Carolina. It was in force for 115 min.

The area

The counties it named.

The facts

Issued
Jul 6, 2011, 4:50 PM EDT (20:50 UTC)
Expired
Jul 6, 2011, 6:45 PM EDT
In force
115 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon

County Orangeburg County, SC

The radar

The Columbia radar (KCAE), 64 km from the middle of the area, began a volume at 20:51 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, 8.8 hours before the alert went out and 96 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 2011-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2191 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 2011-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.1939Sfc1 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
2191 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
710 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
62 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
Jul 5, 9:05 PM EDTFlash Flood WarningCAELexington, Richland52 min
Jul 6, 1:37 PM EDTSevere Thunderstorm WarningCAEFairfield, Kershaw, Lancaster38 min
Jul 6, 2:23 PM EDTAreal Flood AdvisoryCAEFairfield, Kershaw83 min
Jul 6, 2:36 PM EDTAreal Flood AdvisoryCAELexington, Richland72 min
Jul 6, 2:38 PM EDTSevere Thunderstorm WarningCAECalhoun, Lexington, Richland22 min
Jul 6, 2:39 PM EDTFlash Flood WarningCAERichland66 min
Jul 6, 3:03 PM EDTSevere Thunderstorm WarningCAECalhoun, Richland27 min
Jul 6, 4:26 PM EDTSevere Thunderstorm WarningCAEChesterfield34 min

Nearby

Areal Flood Advisories in South Carolina, 2011Every areal flood advisory in 2011

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.