Alert archive / South Carolina / Flash Flood Warnings in 2014

Flash Flood Warning 18, NWS Greenville-Spartanburg, SC

July 31, 2014Anderson County, Greenville County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Jul 31, 2014, 10:35 AM EDT for Anderson County, Greenville 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: Jul 31, 2014, 10:35 AM EDT (14:35 UTC)
Expired: Jul 31, 2014, 1:30 PM EDT
In force: 3 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Anderson County, SC, Greenville County, SC

The radar

The Greer radar (KGSP), 33 km from the middle of the area, began a volume at 14:37 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, 2.6 hours before the alert went out and 306 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: 508 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

Open this sounding in Storm Lab

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 31, 10:40 AM EDT	Flash Flood Watch	GSP	Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more	22 hr
Jul 31, 6:45 AM EDT	Areal Flood Advisory	GSP	Anderson, Greenville	105 min
Jul 31, 7:50 AM EDT	Special Weather Statement	GSP	Spartanburg	40 min
Jul 31, 8:29 AM EDT	Areal Flood Advisory	GSP	Anderson, Greenville	2 hr
Jul 31, 9:29 AM EDT	Flash Flood Warning	GSP	Greenville	3 hr
Jul 31, 12:46 PM EDT	Areal Flood Advisory	GSP	Abbeville	104 min
Jul 31, 3:18 PM EDT	Areal Flood Advisory	GSP	Anderson	102 min
Jul 31, 4:26 PM EDT	Special Weather Statement	GSP	Greenwood	64 min
Jul 31, 5:36 PM EDT	Special Weather Statement	GSP	Abbeville, Greenwood, Laurens	84 min
Jul 31, 6:55 PM EDT	Special Weather Statement	GSP	Chester, Union, York	65 min

Nearby

Flash Flood Warnings in South Carolina, 2014 Every flash flood warning in 2014

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.