Alert archive / North Carolina / Flash Flood Watches in 2015

Flash Flood Watch 6, NWS Greenville-Spartanburg, SC

November 17, 201517 counties in North Carolina; Abbeville County, Anderson County, South Carolina; 6 counties in Georgia

NWS Greenville-Spartanburg, SC issued this flash flood watch at Nov 17, 2015, 2:52 PM EST for 17 counties in North Carolina; Abbeville County, Anderson County, South Carolina; 6 counties in Georgia. It took effect at Nov 18, 2015, 12:00 PM EST. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued: Nov 17, 2015, 2:52 PM EST (19:52 UTC)
In effect from: Nov 18, 2015, 12:00 PM EST
Expired: Nov 19, 2015, 10:00 AM EST
In force: 22 hr
Issued by: NWS Greenville-Spartanburg, SC
Flood severity: None

All 25 counties

Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Rabun County, GA, Stephens County, GA, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC

The radar

The Greer radar (KGSP), 58 km from the middle of the area, began a volume at 19:56 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, 7.9 hours before the alert went out and 270 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2444 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 107 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 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 Nov 17, 2:47 PM EST, 5 minutes earlier.

Area forecast discussion, Nov 17, 2:47 PM EST, 5 minutes before

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Hazardous weather outlook, Nov 17, 4:50 AM EST, 10 hours 2 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
Nov 17, 3:45 AM EST	Wind Advisory	GSP	Avery, Buncombe, Graham, Haywood, Jackson, Macon and 4 more	38 hr

Nearby

Flash Flood Watches in North Carolina, 2015 Flash Flood Watches in Georgia, 2015 Flash Flood Watches in South Carolina, 2015 Every flash flood watch in 2015

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.