Alert archive / South Carolina / Flash Flood Warnings in 2018

Flash Flood Warning 13, NWS Columbia, SC

October 11, 2018Lexington County, Richland County, South Carolina

NWS Columbia, SC issued this flash flood warning at Oct 11, 2018, 6:10 AM EDT for Lexington County, Richland County, South Carolina. It was in force for 4 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 11, 2018, 6:10 AM EDT (10:10 UTC)
Expired
Oct 11, 2018, 10:15 AM EDT
In force
4 hr
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

Counties Lexington County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 3 km from the middle of the area, began a volume at 10:12 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 00:00Z, 10.2 hours before the alert went out and 155 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 00:00Z on 2018-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 846 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 00:00Z on 2018-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 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
846 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
746 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.6

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 10, 11:26 PM EDTTornado WarningCAEOrangeburg34 min
Oct 10, 11:54 PM EDTTornado WarningCAECalhoun, Lexington, Orangeburg, Richland21 min
Oct 11, 2:06 AM EDTAreal Flood AdvisoryCAECalhoun, Lexington, Richland114 min
Oct 11, 2:12 AM EDTAreal Flood AdvisoryCAECalhoun, Orangeburg, Richland2 hr
Oct 11, 2:37 AM EDTTornado WarningCAENewberry23 min
Oct 11, 4:06 AM EDTAreal Flood AdvisoryCAEAiken114 min
Oct 11, 4:15 AM EDTTornado WarningCAECalhoun, Richland30 min
Oct 11, 5:13 AM EDTAreal Flood AdvisoryCAEAiken, Calhoun, Edgefield, Fairfield, Lexington, Newberry and 3 more2 hr
Oct 11, 7:24 AM EDTAreal Flood AdvisoryCAEAiken, Calhoun, Fairfield, Lexington, Newberry, Orangeburg and 3 more2 hr
Oct 11, 7:29 AM EDTAreal Flood AdvisoryCAEFairfield, Kershaw, Lancaster, Lee, Richland, Sumter2 hr
Oct 11, 8:52 AM EDTAreal Flood AdvisoryCAEChesterfield, Kershaw, Lancaster3 hr
Oct 11, 10:18 AM EDTAreal Flood AdvisoryCAELexington, Richland57 min
Oct 11, 12:06 PM EDTAreal Flood AdvisoryCAECalhoun, Fairfield, Kershaw, Lexington, Newberry, Richland114 min
Oct 11, 12:25 PM EDTRiver Flood AdvisoryCAELexington, Richland55 hr
Oct 11, 2:08 PM EDTRiver Flood WarningCAECalhoun, Lexington, Richland5 days
Oct 11, 3:53 PM EDTRiver Flood WarningCAECalhoun, Richland4 days
Oct 11, 3:53 PM EDTRiver Flood WarningCAEChesterfield, Marlboro4 days
Oct 11, 5:23 PM EDTLake Wind AdvisoryCAEAiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more3 hr

Nearby

Flash Flood Warnings in South Carolina, 2018Every flash flood warning in 2018

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.