Alert archive / South Carolina / Flash Flood Watches in 2017

Flash Flood Watch 5, NWS Columbia, SC

June 16, 2017Calhoun County, South Carolina

NWS Columbia, SC issued this flash flood watch at Jun 16, 2017, 10:42 PM EDT for Calhoun County, South Carolina. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Jun 16, 2017, 10:42 PM EDT (02:42 UTC)
Expired
Jun 17, 2017, 10:00 AM EDT
In force
11 hr
Issued by
NWS Columbia, SC
Flood severity
None

County Calhoun County, SC

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 2.7 hours before the alert went out and 279 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, Greensboro/Hi Pt, NC at 00:00Z on 2017-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 433 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, Greensboro/Hi Pt, NC at 00:00Z on 2017-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
433 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
1383 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
22 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
Jun 17, 3:33 PM EDTSpecial Weather StatementCAEClarendon27 min
Jun 17, 3:56 PM EDTSpecial Weather StatementCAEClarendon34 min
Jun 17, 5:21 PM EDTSpecial Weather StatementCAELexington24 min

Nearby

Flash Flood Watches in South Carolina, 2017Every flash flood watch 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.