Alert archive / South Carolina / Flash Flood Warnings in 2016

Flash Flood Warning 7, NWS Charleston, SC

June 30, 2016Allendale County, South Carolina

NWS Charleston, SC issued this flash flood warning at Jun 30, 2016, 7:22 PM EDT for Allendale 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: Jun 30, 2016, 7:22 PM EDT (23:22 UTC)
Expired: Jun 30, 2016, 10:10 PM EDT
In force: 3 hr
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Flood severity: None

County Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 47 km from the middle of the area, began a volume at 23:24 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, 11.4 hours before the alert went out and 127 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 767 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 900 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 3:32 PM EDT	Coastal Flood Advisory	CHS		3 hr
Jun 30, 4:18 PM EDT	Special Weather Statement	CHS	Dorchester	27 min
Jun 30, 4:45 PM EDT	Special Marine Warning	CHS		60 min
Jun 30, 6:39 PM EDT	Areal Flood Advisory	CHS	Allendale, Hampton	66 min
Jun 30, 2:48 PM EDT	Areal Flood Advisory	CHS	Bryan, Evans, Liberty, Long, Tattnall	57 min
Jun 30, 3:30 PM EDT	Areal Flood Advisory	CHS	Bryan, Evans, Liberty, Long, Tattnall	3 hr
Jun 30, 3:44 PM EDT	Areal Flood Advisory	CHS	Chatham	3 hr
Jun 30, 3:52 PM EDT	Special Weather Statement	CHS	Bryan	53 min
Jun 30, 4:47 PM EDT	Special Weather Statement	CHS	Chatham	28 min

Nearby

Flash Flood Warnings in South Carolina, 2016 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.