Alert archive / North Carolina / Flood Watches in 2012

Flood Watch 1, NWS Greenville-Spartanburg, SC

January 10, 201214 counties in North Carolina; Rabun County, Georgia

NWS Greenville-Spartanburg, SC issued this flood watch at Jan 10, 2012, 2:44 PM EST for 14 counties in North Carolina; Rabun County, Georgia. It took effect at Jan 11, 2012, 12:00 AM EST. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Jan 10, 2012, 2:44 PM EST (19:44 UTC)
In effect from: Jan 11, 2012, 12:00 AM EST
Expired: Jan 11, 2012, 7:19 PM EST
In force: 19 hr
Issued by: NWS Greenville-Spartanburg, SC
Flood severity: None

Counties Rabun County, GA, Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Transylvania County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 76 km from the middle of the area, began a volume at 19:45 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, 7.7 hours before the alert went out and 225 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: 954 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 59 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 Jan 10, 1:19 PM EST, 1 hour 25 minutes earlier.

Area forecast discussion, Jan 10, 1:19 PM EST, 1 hour 25 minutes before

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Hazardous weather outlook, Jan 10, 2:21 PM EST, 23 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
Jan 9, 9:58 PM EST	Dense Fog Advisory	GSP	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	11 hr

Nearby

Flood Watches in North Carolina, 2012 Flood Watches in Georgia, 2012 Flood Watches in South Carolina, 2012 Every flood watch in 2012

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.