Alert archive / South Carolina / Flash Flood Warnings in 2022

Flash Flood Warning 23, NWS Greenville-Spartanburg, SC

September 4, 2022Greenville County, Pickens County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Sep 4, 2022, 9:39 AM EDT for Greenville County, Pickens County, South Carolina. It was in force for 4 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: Sep 4, 2022, 9:39 AM EDT (13:39 UTC)
Expired: Sep 4, 2022, 1:30 PM EDT
In force: 4 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Greenville County, SC, Pickens County, SC

The radar

The Greer radar (KGSP), 30 km from the middle of the area, began a volume at 13:41 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 1.7 hours before the alert went out and 247 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: 868 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 536 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this flash flood warning went out at Sep 4, 6:56 AM EDT, 2 hours 43 minutes earlier.

Area forecast discussion, Sep 4, 6:56 AM EDT, 2 hours 43 minutes before

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Hazardous weather outlook, Sep 4, 5:20 AM EDT, 4 hours 19 minutes before

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In the hours before

Special weather statement, Sep 4, 8:26 AM EDT, 1 hour 13 minutes before

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Special weather statement, Sep 4, 8:53 AM EDT, 46 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 8:26 AM EDT	Special Weather Statement	GSP	Gaston	49 min
Sep 4, 9:18 AM EDT	Areal Flood Advisory	GSP	Transylvania	3 hr
Sep 4, 10:07 AM EDT	Flash Flood Warning	GSP	Transylvania	4 hr
Sep 4, 11:37 AM EDT	Flash Flood Warning Considerable damage threat	GSP	Henderson, Transylvania	4 hr
Sep 4, 7:36 PM EDT	Special Weather Statement	GSP	Iredell	54 min
Sep 4, 8:53 AM EDT	Special Weather Statement	GSP	Pickens	52 min
Sep 4, 11:07 AM EDT	Areal Flood Advisory	GSP	Oconee, Pickens	5 hr
Sep 4, 3:28 PM EDT	Areal Flood Advisory	GSP	Greenville, Pickens	2 hr
Sep 4, 4:18 PM EDT	Special Weather Statement	GSP	Anderson	42 min

Nearby

Flash Flood Warnings in South Carolina, 2022 Every flash flood warning in 2022

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.