Alert archive / North Carolina / Flash Flood Warnings in 2023

Flash Flood Warning 17, NWS Greenville-Spartanburg, SC

August 28, 2023Iredell County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 28, 2023, 9:13 PM EDT for Iredell County, North Carolina. It was in force for 6 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: Aug 28, 2023, 9:13 PM EDT (01:13 UTC)
Expired: Aug 29, 2023, 3:00 AM EDT
In force: 6 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Iredell County, NC

The radar

The Roanoke radar (KFCX), 146 km from the middle of the area, began a volume at 01:12 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 1.2 hours before the alert went out and 93 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: 638 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

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 Aug 28, 7:53 PM EDT, 1 hour 20 minutes earlier.

Area forecast discussion, Aug 28, 7:53 PM EDT, 1 hour 20 minutes before

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Hazardous weather outlook, Aug 28, 4:01 AM EDT, 17 hours 12 minutes before

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In the hours before

Special weather statement, Aug 28, 7:44 PM EDT, 1 hour 29 minutes before

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Special weather statement, Aug 28, 8:07 PM EDT, 1 hour 6 minutes before

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Special weather statement, Aug 28, 8:15 PM EDT, 58 minutes before

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Special weather statement, Aug 28, 8:41 PM EDT, 32 minutes before

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Special weather statement, Aug 28, 8:48 PM EDT, 25 minutes before

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Special weather statement, Aug 28, 9:12 PM EDT, 1 minute 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
Aug 28, 8:15 PM EDT	Special Weather Statement	GSP	Iredell	30 min
Aug 28, 8:30 PM EDT	Areal Flood Advisory	GSP	Alexander, Iredell	6 hr
Aug 28, 8:41 PM EDT	Special Weather Statement	GSP	Rutherford	34 min
Aug 28, 9:03 PM EDT	Areal Flood Advisory	GSP	Davie, Rowan	6 hr
Aug 28, 9:45 PM EDT	Special Weather Statement	GSP	Macon	30 min
Aug 28, 9:47 PM EDT	Special Weather Statement	GSP	Polk	28 min
Aug 28, 10:13 PM EDT	Special Weather Statement	GSP	Macon	32 min
Aug 28, 10:29 PM EDT	Special Weather Statement	GSP	Polk	46 min
Aug 28, 10:59 PM EDT	Special Weather Statement	GSP	Transylvania	46 min
Aug 29, 12:40 AM EDT	Special Weather Statement	GSP	Polk	35 min
Aug 29, 3:03 PM EDT	Flood Watch	GSP	Cabarrus, Mecklenburg, Union	30 hr
Aug 29, 5:50 PM EDT	Severe Thunderstorm Warning	GSP	Mecklenburg	40 min
Aug 29, 6:45 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	5 hr
Aug 28, 8:07 PM EDT	Special Weather Statement	GSP	Pickens	23 min
Aug 28, 9:17 PM EDT	Special Weather Statement	GSP	Greenville	28 min
Aug 28, 10:34 PM EDT	Special Weather Statement	GSP	Spartanburg	41 min
Aug 28, 11:11 PM EDT	Special Weather Statement	GSP	Spartanburg	34 min
Aug 28, 11:15 PM EDT	Special Weather Statement	GSP	Greenville	30 min
Aug 28, 11:34 PM EDT	Special Weather Statement	GSP	Cherokee	41 min
Aug 28, 11:40 PM EDT	Special Weather Statement	GSP	Pickens	35 min
Aug 29, 12:08 AM EDT	Special Weather Statement	GSP	Greenville	37 min
Aug 29, 12:26 AM EDT	Special Weather Statement	GSP	Greenville	34 min
Aug 29, 12:28 AM EDT	Areal Flood Advisory	GSP	Cherokee, Spartanburg	6 hr
Aug 29, 12:35 AM EDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens, Spartanburg	25 min
Aug 29, 12:44 AM EDT	Areal Flood Advisory	GSP	Greenville, Pickens	6 hr
Aug 29, 12:54 AM EDT	Special Weather Statement	GSP	York	36 min
Aug 29, 6:45 AM EDT	Special Weather Statement	GSP	Oconee	45 min
Aug 29, 7:07 AM EDT	Areal Flood Advisory	GSP	Oconee	3 hr
Aug 29, 9:17 AM EDT	Areal Flood Advisory	GSP	Anderson, Oconee, Pickens	103 min
Aug 29, 6:14 PM EDT	Special Weather Statement	GSP	Cherokee	31 min
Aug 29, 6:27 PM EDT	Special Weather Statement	GSP	Abbeville	33 min
Aug 29, 7:00 PM EDT	Special Weather Statement	GSP	Laurens	30 min
Aug 28, 8:48 PM EDT	Special Weather Statement	GSP	Habersham	27 min
Aug 28, 9:12 PM EDT	Special Weather Statement	GSP	Franklin, Habersham, Rabun, Stephens	33 min

Nearby

Flash Flood Warnings in North Carolina, 2023 Every flash flood warning in 2023

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.