Alert archive / North Carolina / Flash Flood Watches in 2013

Flash Flood Watch 2, NWS Greenville-Spartanburg, SC

April 28, 201311 counties in North Carolina; Habersham County, Rabun County, Stephens County, Georgia

NWS Greenville-Spartanburg, SC issued this flash flood watch at Apr 28, 2013, 9:41 AM EDT for 11 counties in North Carolina; Habersham County, Rabun County, Stephens County, Georgia. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Apr 28, 2013, 9:41 AM EDT (13:41 UTC)
Expired
Apr 28, 2013, 8:00 PM EDT
In force
10 hr
Issued by
NWS Greenville-Spartanburg, SC
Flood severity
None

Counties Habersham County, GA, Rabun County, GA, Stephens County, GA, Buncombe County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 81 km from the middle of the area, began a volume at 13:43 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 252 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2013-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2013-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 308 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
511 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
308 m²/s²
0-3 km storm-relative helicity
379 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 8:46 AM EDTAreal Flood AdvisoryGSPGraham2 hr
Apr 28, 10:58 AM EDTAreal Flood AdvisoryGSPGraham3 hr
Apr 28, 3:55 PM EDTRiver Flood AdvisoryGSPHenderson, Transylvania12 hr
Apr 28, 7:47 PM EDTAreal Flood AdvisoryGSPTransylvania103 min
Apr 28, 5:23 PM EDTSpecial Weather StatementGSPGreenwood82 min
Apr 28, 6:33 PM EDTSpecial Weather StatementGSPGreenwood42 min

Nearby

Flash Flood Watches in North Carolina, 2013Flash Flood Watches in Georgia, 2013Flash Flood Watches in South Carolina, 2013Every flash flood watch in 2013

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.