Alert archive / North Carolina / Flash Flood Watches in 2009

Flash Flood Watch 4, NWS Greenville-Spartanburg, SC

June 15, 200911 counties in North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood watch at Jun 15, 2009, 11:49 PM EDT for 11 counties in North Carolina. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jun 15, 2009, 11:49 PM EDT (03:49 UTC)
Expired
Jun 16, 2009, 9:00 AM EDT
In force
9 hr
Issued by
NWS Greenville-Spartanburg, SC
Flood severity
None

Counties Alexander County, NC, Avery County, NC, Burke County, NC, Caldwell County, NC, Catawba County, NC, Davie County, NC, Iredell County, NC, McDowell County, NC, Mitchell County, NC, Rowan County, NC, Yancey County, NC

The radar

The Greer radar (KGSP), 128 km from the middle of the area, began a volume at 03:49 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 00:00Z, 3.8 hours before the alert went out and 142 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, Greensboro/Hi Pt, NC at 00:00Z on 2009-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 976 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, Greensboro/Hi Pt, NC at 00:00Z on 2009-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 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
976 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.7

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 Jun 15, 11:13 PM EDT, 36 minutes earlier.

Area forecast discussion, Jun 15, 11:13 PM EDT, 36 minutes before
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Hazardous weather outlook, Jun 15, 5:37 AM EDT, 18 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
537 AM EDT MON JUN 15 2009

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-161000-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-AVERY-ALEXANDER-
IREDELL-DAVIE-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-CATAWBA-
ROWAN-GRAHAM-NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-
HENDERSON-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-UNION NC-
CALDWELL MOUNTAINS-GREATER CALDWELL-BURKE MOUNTAINS-GREATER BURKE-
MCDOWELL MOUNTAINS-EASTERN MCDOWELL-RUTHERFORD MOUNTAINS-
GREATER RUTHERFORD-POLK MOUNTAINS-EASTERN POLK-OCONEE MOUNTAINS-
PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-GREATER OCONEE-
GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK-
ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
537 AM EDT MON JUN 15 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT
NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TODAY AND
TONIGHT. SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE...
PRODUCING DAMAGING WIND OR LARGE HAIL. HEAVY RAINFALL IS POSSIBLE
AS WELL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

SCATTERED TO NUMEROUS THUNDERSTORMS ARE IN THE FORECAST FROM
TUESDAY THROUGH WEDNESDAY NIGHT. A FEW OF THESE THUNDERSTORMS
COULD BECOME SEVERE...PRODUCING DAMAGING WIND OR LARGE HAIL. HEAVY
RAINFALL WILL ALSO BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTERS ARE REQUESTED TO FORWARD ANY REPORTS OF LARGE
HAIL...DAMAGING WINDS...TORNADOES OR FLASH FLOODING TO OUR OFFICE.

07

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 5:52 AM EDTSevere Thunderstorm WarningGSPIredell, Rowan53 min
Jun 16, 4:23 PM EDTSevere Thunderstorm WarningGSPHenderson, Transylvania45 min
Jun 16, 4:58 PM EDTSevere Thunderstorm WarningGSPBurke, Caldwell, Catawba, Cleveland, Lincoln62 min
Jun 16, 5:39 PM EDTSevere Thunderstorm WarningGSPCleveland, Gaston, Lincoln66 min
Jun 16, 5:50 PM EDTTornado WarningGSPCleveland, Gaston, Lincoln40 min
Jun 16, 6:29 PM EDTTornado WarningGSPCleveland, Gaston40 min
Jun 16, 6:33 PM EDTSevere Thunderstorm WarningGSPCleveland, Rutherford57 min
Jun 16, 3:48 PM EDTSevere Thunderstorm WarningGSPGreenville, Pickens57 min
Jun 16, 4:40 PM EDTSevere Thunderstorm WarningGSPAnderson, Greenville, Pickens65 min
Jun 16, 5:41 PM EDTSevere Thunderstorm WarningGSPAbbeville, Anderson, Greenville, Greenwood, Laurens64 min
Jun 16, 6:14 PM EDTTornado WarningGSPChester, York61 min
Jun 16, 6:20 PM EDTSevere Thunderstorm WarningGSPAnderson, Oconee, Pickens35 min
Jun 16, 6:48 PM EDTTornado WarningGSPCherokee, Spartanburg, Union42 min
Jun 16, 7:04 PM EDTTornado WarningGSPChester29 min
Jun 16, 7:31 PM EDTSevere Thunderstorm WarningGSPCherokee, Chester, Union14 min

Nearby

Flash Flood Watches in North Carolina, 2009Every flash flood watch in 2009

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.