Alert archive / South Carolina / Flash Flood Warnings in 2017

Flash Flood Warning 4, NWS Columbia, SC

April 24, 2017Richland County, South Carolina

NWS Columbia, SC issued this flash flood warning at Apr 24, 2017, 12:05 AM EDT for Richland County, South Carolina. It was in force for 115 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
Apr 24, 2017, 12:05 AM EDT (04:05 UTC)
Expired
Apr 24, 2017, 2:00 AM EDT
In force
115 min
Issued by
NWS Columbia, SC
Area
Storm-based polygon
Flood severity
None

County Richland County, SC

The radar

The Columbia radar (KCAE), 21 km from the middle of the area, began a volume at 04:07 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, 4.1 hours before the alert went out and 150 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 2017-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 487 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 2017-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 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
487 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
921 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Columbia, SC wrote its last area forecast discussion before this flash flood warning went out at Apr 23, 5:59 PM EDT, 6 hours 6 minutes earlier.

Area forecast discussion, Apr 23, 5:59 PM EDT, 6 hours 6 minutes before
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Hazardous weather outlook, Apr 23, 11:07 AM EDT, 12 hours 58 minutes before
Hazardous Weather Outlook
National Weather Service Columbia SC
1107 AM EDT Sun Apr 23 2017

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-241515-
Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield-
McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-
Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-
Bamberg-
1107 AM EDT Sun Apr 23 2017

...FLASH FLOOD WATCH IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
MONDAY EVENING...

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

There is a marginal risk of severe weather this afternoon and
tonight as a cold front pushes into the region. Damaging winds...
large hail and isolated tornadoes are the main threats.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

Isolated strong storms are expected on Monday with an upper level
low moving over the region. Large hail is possible and the primary
threat along.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

In the hours before

Special weather statement, Apr 23, 6:35 PM EDT, 5 hours 30 minutes before
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Special weather statement, Apr 23, 7:40 PM EDT, 4 hours 25 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 8:00 PM EDTSpecial Weather StatementCAERichland30 min
Apr 23, 8:17 PM EDTSpecial Weather StatementCAEKershaw28 min
Apr 23, 8:54 PM EDTAreal Flood AdvisoryCAEAiken, Barnwell111 min
Apr 23, 10:56 PM EDTSpecial Weather StatementCAELexington49 min
Apr 23, 11:20 PM EDTAreal Flood AdvisoryCAELexington, Richland115 min
Apr 24, 1:13 AM EDTAreal Flood AdvisoryCAEBamberg, Calhoun, Orangeburg2 hr
Apr 24, 1:49 AM EDTSpecial Weather StatementCAEClarendon41 min
Apr 24, 2:13 AM EDTSevere Thunderstorm WarningCAEClarendon33 min
Apr 24, 2:28 AM EDTAreal Flood AdvisoryCAECalhoun, Clarendon, Sumter62 min
Apr 24, 6:25 AM EDTAreal Flood AdvisoryCAECalhoun, Lexington, Orangeburg, Richland2 hr
Apr 24, 6:32 AM EDTAreal Flood AdvisoryCAECalhoun, Clarendon, Orangeburg, Sumter118 min
Apr 24, 8:56 AM EDTAreal Flood AdvisoryCAECalhoun, Clarendon, Kershaw, Richland, Sumter64 min
Apr 24, 9:37 AM EDTAreal Flood AdvisoryCAEClarendon, Kershaw, Lee, Sumter53 min
Apr 24, 10:23 AM EDTAreal Flood AdvisoryCAEAiken, Edgefield67 min
Apr 24, 11:33 AM EDTRiver Flood WarningCAEChesterfield, Marlboro6 days
Apr 24, 11:33 AM EDTRiver Flood WarningCAEFairfield, Kershaw, Lancaster5 days
Apr 24, 11:47 AM EDTAreal Flood AdvisoryCAEChesterfield, Kershaw, Lancaster118 min
Apr 24, 2:31 PM EDTSpecial Weather StatementCAECalhoun44 min
Apr 24, 2:33 PM EDTSevere Thunderstorm WarningCAECalhoun, Lexington, Richland27 min
Apr 24, 4:35 PM EDTSpecial Weather StatementCAEOrangeburg25 min
Apr 24, 4:52 PM EDTSpecial Weather StatementCAEOrangeburg53 min
Apr 24, 5:03 PM EDTSpecial Weather StatementCAEOrangeburg57 min
Apr 24, 5:18 PM EDTAreal Flood AdvisoryCAEOrangeburg117 min
Apr 24, 5:22 PM EDTFlash Flood WarningCAEOrangeburg53 min
Apr 24, 5:35 PM EDTSpecial Weather StatementCAEOrangeburg40 min
Apr 24, 6:00 PM EDTSpecial Weather StatementCAEOrangeburg45 min
Apr 24, 6:45 PM EDTSevere Thunderstorm WarningCAEOrangeburg30 min
Apr 24, 6:49 PM EDTFlash Flood WarningCAEOrangeburg56 min
Apr 24, 7:33 PM EDTSpecial Weather StatementCAECalhoun, Orangeburg57 min
Apr 23, 9:13 PM EDTAreal Flood AdvisoryCAEBurke2 hr
Apr 24, 9:08 AM EDTSpecial Weather StatementCAERichmond37 min

Nearby

Flash Flood Warnings in South Carolina, 2017Every flash flood warning in 2017

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.