Alert archive / South Carolina / Flash Flood Warnings in 2015

Flash Flood Warning 33, NWS Columbia, SC

October 10, 2015Clarendon County, Sumter County, South Carolina

NWS Columbia, SC issued this flash flood warning at Oct 10, 2015, 6:17 PM EDT for Clarendon County, Sumter County, South Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 10, 2015, 6:17 PM EDT (22:17 UTC)
Expired
Oct 10, 2015, 9:15 PM EDT
In force
3 hr
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

Counties Clarendon County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 78 km from the middle of the area, began a volume at 22:18 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, 10.3 hours before the alert went out and 103 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 2015-10-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 228 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 2015-10-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
228 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
1066 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 10, 4:07 AM EDTFlash Flood WatchCAEAiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 9 more20 hr
Oct 10, 7:30 AM EDTAreal Flood AdvisoryCAEAiken, Calhoun, Fairfield, Lexington, Orangeburg, Richland2 hr
Oct 10, 8:20 AM EDTFlash Flood WarningCAERichland85 min
Oct 10, 9:27 AM EDTAreal Flood AdvisoryCAEChesterfield, Kershaw, Lee, Richland, Sumter2 hr
Oct 10, 10:19 AM EDTAreal Flood AdvisoryCAEChesterfield116 min
Oct 10, 10:32 AM EDTAreal Flood WarningCAEAiken, Lexington, Richland118 min
Oct 10, 11:47 AM EDTAreal Flood AdvisoryCAEClarendon, Lee, Orangeburg, Sumter3 hr
Oct 10, 3:42 PM EDTRiver Flood WarningCAECalhoun, Lexington, Richland4 days
Oct 10, 4:09 PM EDTAreal Flood AdvisoryCAEAiken, Calhoun, Edgefield, Lexington, McCormick, Newberry and 3 more3 hr
Oct 10, 5:13 PM EDTFlash Flood WarningCAELexington3 hr
Oct 10, 5:44 PM EDTSpecial Weather StatementCAELexington46 min
Oct 10, 6:06 PM EDTAreal Flood AdvisoryCAEClarendon, Sumter3 hr
Oct 10, 6:14 PM EDTFlash Flood WarningCAEAiken, Lexington3 hr
Oct 10, 7:11 PM EDTAreal Flood AdvisoryCAEBamberg, Barnwell, Clarendon, Orangeburg, Sumter3 hr

Nearby

Flash Flood Warnings in South Carolina, 2015Every flash flood warning in 2015

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.