Alert archive / South Carolina / Flash Flood Warnings in 2016

Flash Flood Warning 11, NWS Charleston, SC

October 8, 2016Berkeley County, Dorchester County, South Carolina

NWS Charleston, SC issued this flash flood warning at Oct 8, 2016, 7:27 AM EDT for Berkeley County, Dorchester County, South Carolina. It was in force for 4 hr. 7 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 8, 2016, 7:27 AM EDT (11:27 UTC)
Expired
Oct 8, 2016, 11:30 AM EDT
In force
4 hr
Issued by
NWS Charleston, SC
Area
Storm-based polygon
Flood severity
None

Counties Berkeley County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 95 km from the middle of the area, began a volume at 11:29 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.

What was reported inside it

TimeReportWhereRemark
Oct 8, 7:30 AM EDTHEAVY RAIN 04 S Reevesville, SCSAULS BRANCH RD...A DIRT ROAD NEAR COWTAIL RD...WAS WASHED OUT BY FLOODING.
Oct 8, 8:00 AM EDTFLASH FLOOD4 Ssw Dorchester, SCZION RD AT OLD DAM RD WAS WASHED OUT AND IS IMPASSABLE.
Oct 8, 8:00 AM EDTFLASH FLOOD5 Nw Givhans Ferry Stat, SCZION RD AT WIRE RD WAS PARTIALLY WASHED OUT AND IS IMPASSABLE.
Oct 8, 10:35 AM EDTHEAVY RAIN 06 N Sangaree, SCBERKELEY COUNTY REPORTED 18-24 INCHES OF STANDING WATER AT THE ENTRANCE OF CANE BAY NEIGHBORHOOD.
Oct 8, 11:00 AM EDTFLASH FLOOD3 Ssw Bonneau, SCSOCIAL MEDIA PICTURE SHOWS A ROAD IN THE OVERTON SUBDIVISION...PRIMARY ROAD IN AND OUT.
Oct 8, 11:00 AM EDTFLASH FLOOD3 Ssw Bonneau, SCSOCIAL MEDIA PICTURE SHOWS THE PRIMARY ROAD FOR OVERTON SUBDIVISION IS WASHED OUT.
Oct 8, 11:00 AM EDTFLASH FLOOD4 Ssw Bonneau, SCSOCIAL MEDIA PICTURE SHOWS A ROAD TO THE JOINT BASE CHARLESTON SHORT STAY WASHED OUT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 11.5 hours before the alert went out and 48 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 2016-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 248 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 00:00Z on 2016-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 306 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
248 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
306 m²/s²
0-3 km storm-relative helicity
345 m²/s²
Significant tornado parameter
0.4
Supercell composite
7.6

Open this sounding in Storm Lab

The text

As transmitted.

395 
WGUS52 KCHS 081127
FFWCHS
SCC015-035-081530-
/O.NEW.KCHS.FF.W.0011.161008T1127Z-161008T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHARLESTON SC
727 AM EDT SAT OCT 8 2016

THE NATIONAL WEATHER SERVICE IN CHARLESTON HAS ISSUED A

* FLASH FLOOD WARNING FOR PORTIONS OF...
  DORCHESTER COUNTY IN SOUTHEASTERN SOUTH CAROLINA...
  BERKELEY COUNTY IN SOUTHEASTERN SOUTH CAROLINA...

* UNTIL 1130 AM EDT

* AT 726 AM EDT...DOPPLER RADAR INDICATED TORRENTIAL RAINS
  ASSOCIATED WITH HURRICANE MATTHEW. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY AS HEAVY RAINS PERSIST FOR THE NEXT FEW HOURS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SUMMERVILLE...MONCKS CORNER...SAINT GEORGE...SLANDS BRIDGE...INDIAN
  FIELD...GIVHANS FERRY STATE PARK...DORCHESTER AND ST. GEORGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT FLOODING DIRECTLY TO THE CHARLESTON NATIONAL WEATHER SERVICE
AT 1-888-383-2024 OR EMAIL YOUR REPORTS TO NWS.CHARLESTONSC@NOAA.GOV.

&&

LAT...LON 3332 7972 3286 8038 3286 8040 3297 8042
      3305 8040 3307 8062 3315 8070 3318 8079
      3333 8051 3328 8049 3326 8043 3326 8036
      3328 8035 3327 8030 3330 8025 3345 8022
      3345 8014 3348 8015 3350 8012 3351 7999

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 8, 12:20 AM EDTFlash Flood WarningCHSAllendale, Beaufort, Colleton, Hampton, Jasper10 hr
Oct 8, 3:54 AM EDTRiver Flood WarningCHSColleton, Dorchester13 days
Oct 8, 3:54 AM EDTRiver Flood WarningCHSBerkeley, Georgetown, Williamsburg5 days
Oct 8, 9:42 AM EDTFlash Flood WarningCHSBerkeley, Charleston, Colleton, Dorchester108 min
Oct 8, 10:45 AM EDTAreal Flood WarningCHSAllendale, Beaufort, Charleston, Colleton, Dorchester, Hampton and 1 more6 hr
Oct 8, 11:27 AM EDTAreal Flood WarningCHSBeaufort, Berkeley, Charleston, Colleton, Dorchester5 hr
Oct 8, 1:53 PM EDTSmall Craft AdvisoryCHS8 days
Oct 8, 3:57 PM EDTLake Wind AdvisoryCHSBerkeley19 hr

Nearby

Flash Flood Warnings in South Carolina, 2016Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.