Alert archive / North Carolina / Flash Flood Warnings in 2010

Flash Flood Warning 54, NWS Greenville-Spartanburg, SC

November 30, 20104 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Nov 30, 2010, 1:15 PM EST for 4 counties in North Carolina. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 30, 2010, 1:15 PM EST (18:15 UTC)
Expired: Nov 30, 2010, 7:15 PM EST
In force: 6 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Henderson County, NC, Jackson County, NC, Macon County, NC, Transylvania County, NC

The radar

The Greer radar (KGSP), 78 km from the middle of the area, began a volume at 18:19 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, 6.3 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-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: 125 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 400 m²/s²
0-3 km storm-relative helicity: 407 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning 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 warning went out at Nov 30, 12:07 PM EST, 1 hour 8 minutes earlier.

Area forecast discussion, Nov 30, 12:07 PM EST, 1 hour 8 minutes before

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Hazardous weather outlook, Nov 30, 10:26 AM EST, 2 hours 49 minutes before

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In the hours before

Local storm report, Nov 30, 11:20 AM EST, 1 hour 55 minutes before

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Local storm report, Nov 30, 12:31 PM EST, 44 minutes before

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Local storm report, Nov 30, 12:36 PM EST, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1236 PM EST TUE NOV 30 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1228 PM     FLASH FLOOD      HENDERSONVILLE          35.32N 82.46W
11/30/2010                   HENDERSON          NC   DEPT OF HIGHWAYS

            SOUTH GROVE ROAD CLOSED DUE TO FLOODING.WATER COVERING
            PARTS OF KING STREET AND SOUTH CENTER INTERSECTION.

&&

PTANNER

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 9:34 AM EST	Areal Flood Advisory	GSP	Henderson, Transylvania	116 min
Nov 30, 10:27 AM EST	River Flood Warning	GSP	Henderson, Transylvania	3 days
Nov 30, 10:50 AM EST	Flash Flood Warning	GSP	Henderson, Transylvania	3 hr
Nov 30, 2:56 PM EST	Lake Wind Advisory	GSP	Alexander, Cabarrus, Catawba, Davie, Gaston, Iredell and 4 more	12 hr
Nov 30, 4:54 PM EST	Special Weather Statement	GSP	Jackson, Transylvania	51 min
Nov 30, 4:23 PM EST	Special Weather Statement	GSP	Oconee	52 min
Nov 30, 4:25 PM EST	Severe Thunderstorm Warning	GSP	Oconee	65 min
Nov 30, 5:04 PM EST	Severe Thunderstorm Warning	GSP	Oconee	41 min
Nov 30, 5:33 PM EST	Tornado Warning	GSP	Oconee	27 min
Nov 30, 5:34 PM EST	Areal Flood Advisory	GSP	Greenville, Oconee, Pickens	116 min
Nov 30, 6:02 PM EST	Special Weather Statement	GSP	Anderson, Pickens	43 min
Nov 30, 6:07 PM EST	Severe Thunderstorm Warning	GSP	Anderson, Greenville, Oconee, Pickens	53 min
Nov 30, 6:35 PM EST	Severe Thunderstorm Warning	GSP	Anderson, Oconee	40 min
Nov 30, 6:50 PM EST	Tornado Warning	GSP	Anderson	25 min

Nearby

Flash Flood Warnings in North Carolina, 2010 Every flash flood warning in 2010

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.