Alert archive / North Carolina / Flash Flood Warnings in 2026
Flash Flood Warning 10, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Jul 23, 2026, 8:21 AM EDT for Graham County, Swain County, North 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 23, 2026, 8:21 AM EDT (12:21 UTC)
- Expired
- Jul 23, 2026, 11:15 AM EDT
- In force
- 3 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
Counties Graham County, NC, Swain County, NC
The radar
The Knoxville radar (KMRX), 87 km from the middle of the area, began a volume at 12:23 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 12:00Z, 0.4 hours before the alert went out and 347 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.
- Mixed-layer CAPE
- 58 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -82 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 9:21 PM EDT | Special Weather Statement | GSP | Iredell | 24 min |
| Jul 23, 6:15 AM EDT | Areal Flood Advisory | GSP | Davie, Iredell, Rowan | 4 hr |
| Jul 23, 6:40 AM EDT | Areal Flood Advisory | GSP | Graham, Swain | 4 hr |
| Jul 23, 7:00 AM EDT | Special Weather Statement | GSP | Rowan | 30 min |
| Jul 23, 7:28 AM EDT | Areal Flood Advisory | GSP | Rowan | 3 hr |
| Jul 23, 9:58 AM EDT | Areal Flood Advisory | GSP | Iredell, Rowan | 5 hr |
| Jul 23, 11:55 AM EDT | Areal Flood Advisory | GSP | Mecklenburg, Union | 12 hr |
| Jul 23, 4:47 PM EDT | Areal Flood Advisory | GSP | Rowan | 6 hr |
| Jul 23, 5:35 PM EDT | Areal Flood Advisory | GSP | Buncombe | 3 hr |
| Jul 23, 6:05 PM EDT | Flash Flood Warning | GSP | Buncombe | 3 hr |
| Jul 23, 6:08 PM EDT | Areal Flood Advisory | GSP | Buncombe, McDowell, Yancey | 3 hr |
| Jul 23, 6:33 PM EDT | Areal Flood Advisory | GSP | Buncombe, Henderson | 3 hr |
| Jul 23, 2:05 PM EDT | Special Weather Statement | GSP | Spartanburg | 25 min |
| Jul 23, 4:10 PM EDT | Areal Flood Advisory | GSP | Greenville, Spartanburg | 4 hr |
Nearby
Flash Flood Warnings in North Carolina, 2026Every flash flood warning in 2026
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.