Alert archive / North Carolina / Flash Flood Watches in 2018
Flash Flood Watch 9, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood watch at Sep 13, 2018, 3:09 PM EDT for 25 counties in North Carolina; 8 counties in South Carolina. It took effect at Sep 15, 2018, 8:00 AM EDT. It was in force for 50 hr.
The area
The counties it named.
The facts
- Issued
- Sep 13, 2018, 3:09 PM EDT (19:09 UTC)
- In effect from
- Sep 15, 2018, 8:00 AM EDT
- Expired
- Sep 17, 2018, 10:12 AM EDT
- In force
- 50 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Flood severity
- None
All 33 counties
Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Transylvania County, NC, Union County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 67 km from the middle of the area, began a volume at 19:10 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, 7.2 hours before the alert went out and 316 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
- 379 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 801 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Sep 13, 2:58 PM EDT, 11 minutes earlier.
Area forecast discussion, Sep 13, 2:58 PM EDT, 11 minutes before
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</html>Hazardous weather outlook, Sep 13, 4:31 AM EDT, 10 hours 38 minutes before
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Special weather statement, Sep 13, 2:52 PM EDT, 17 minutes before
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</html>The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 3:51 PM EDT | Special Weather Statement | GSP | Yancey | 39 min |
| Sep 13, 6:08 PM EDT | Special Weather Statement | GSP | Oconee | 37 min |
| Sep 13, 2:52 PM EDT | Special Weather Statement | GSP | Rabun | 38 min |
Nearby
Flash Flood Watches in North Carolina, 2018Flash Flood Watches in South Carolina, 2018Every flash flood watch in 2018
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.