Alert archive / North Carolina / Flood Watches in 2011

Flood Watch 3, NWS Greenville-Spartanburg, SC

November 27, 20119 counties in North Carolina; Habersham County, Rabun County, Stephens County, Georgia

NWS Greenville-Spartanburg, SC issued this flood watch at Nov 27, 2011, 2:50 PM EST for 9 counties in North Carolina; Habersham County, Rabun County, Stephens County, Georgia. It took effect at Nov 28, 2011, 12:00 AM EST. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Nov 27, 2011, 2:50 PM EST (19:50 UTC)
In effect from
Nov 28, 2011, 12:00 AM EST
Expired
Nov 28, 2011, 10:55 AM EST
In force
11 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, Swain County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 92 km from the middle of the area, began a volume at 19:48 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, 7.8 hours before the alert went out and 243 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 2011-11-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-11-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 334 square meters per square second.19395878Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
334 m²/s²
0-3 km storm-relative helicity
308 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 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 flood watch went out at Nov 27, 2:41 PM EST, 9 minutes earlier.

Area forecast discussion, Nov 27, 2:41 PM EST, 9 minutes before
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Hazardous weather outlook, Nov 27, 7:20 AM EST, 7 hours 30 minutes before
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Nearby

Flood Watches in North Carolina, 2011Flood Watches in Georgia, 2011Flood Watches in South Carolina, 2011Every flood watch in 2011

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.