Alert archive / North Carolina / Flash Flood Warnings in 2010

Flash Flood Warning 44, NWS Greenville-Spartanburg, SC

August 18, 2010Henderson County, Rutherford County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 18, 2010, 7:57 PM EDT for Henderson County, Rutherford County, North Carolina. It was in force for 3 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
Aug 18, 2010, 7:57 PM EDT (23:57 UTC)
Expired
Aug 18, 2010, 10:44 PM EDT
In force
3 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

Counties Henderson County, NC, Rutherford County, NC

The radar

The Greer radar (KGSP), 54 km from the middle of the area, began a volume at 23:57 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, 12.0 hours before the alert went out and 222 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 12:00Z on 2010-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1694 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2010-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.1939Sfc1 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
1694 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
504 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
87 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 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 Aug 18, 7:52 PM EDT, 5 minutes earlier.

Area forecast discussion, Aug 18, 7:52 PM EDT, 5 minutes before
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Hazardous weather outlook, Aug 18, 3:24 PM EDT, 4 hours 33 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
324 PM EDT WED AUG 18 2010

GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-508-510-
SCZ001>014-019-191930-
RABUN-HABERSHAM-STEPHENS-FRANKLIN-HART-ELBERT-ALEXANDER-IREDELL-
DAVIE-CATAWBA-ROWAN-CLEVELAND-LINCOLN-GASTON-MECKLENBURG-CABARRUS-
UNION NC-GREATER RUTHERFORD-EASTERN POLK-OCONEE MOUNTAINS-
PICKENS MOUNTAINS-GREENVILLE MOUNTAINS-GREATER OCONEE-
GREATER PICKENS-GREATER GREENVILLE-SPARTANBURG-CHEROKEE-YORK-
ANDERSON-ABBEVILLE-LAURENS-UNION SC-CHESTER-GREENWOOD-
324 PM EDT WED AUG 18 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NUMEROUS TO WIDESPREAD SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP
THIS AFTERNOON AND EVENING. LOCALLY HEAVY...IF NOT EXCESSIVE
RAINFALL WILL ACCOMPANY THE STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NUMEROUS SHOWERS AND THUNDERSTORMS WILL BE SEEN AGAIN ON THURSDAY.
THE BIGGEST THREAT WITH STORMS WILL BE A PERIOD OF HEAVY RAIN.

.SPOTTER INFORMATION STATEMENT...

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

NCZ033-048>053-058-059-062>065-501>507-509-191930-
AVERY-MADISON-YANCEY-MITCHELL-SWAIN-HAYWOOD-BUNCOMBE-GRAHAM-
NORTHERN JACKSON-MACON-SOUTHERN JACKSON-TRANSYLVANIA-HENDERSON-
CALDWELL MOUNTAINS-GREATER CALDWELL-BURKE MOUNTAINS-GREATER BURKE-
MCDOWELL MOUNTAINS-EASTERN MCDOWELL-RUTHERFORD MOUNTAINS-
POLK MOUNTAINS-
324 PM EDT WED AUG 18 2010

...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN NORTH CAROLINA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Aug 18, 5:21 PM EDT, 2 hours 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
521 PM EDT WED AUG 18 2010

SCZ009-014-182200-
CHESTER-YORK-
521 PM EDT WED AUG 18 2010

...A STRONG THUNDERSTORM WILL AFFECT CHESTER AND SOUTHWESTERN YORK
COUNTIES THROUGH 600 PM EDT...

AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTHEAST OF LOCKHART...OR 10 MILES WEST
OF CHESTER...MOVING NORTHEAST AT 25 MPH.

THIS STORM WILL BE NEAR...
  CHESTER...
  LOWRYS...
  MCCONNELLS...
  RICHBURG...

VERY HEAVY RAINFALL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED
WITH THIS STORM. OTHER THUNDERSTORMS ARE AFFECTING AREAS ACROSS
CHESTER AND YORK COUNTIES CURRENTLY...MAINLY AROUND BULLOCK
CREEK...TO CHESTER...AND CORNWELL. THESE STORMS WILL EVENTUALLY
AFFECT LOCATIONS AROUND SHARON...TO MCCONNELLS AND EDGEMOOR.
TORRENTIAL HEAVY RAINFALL CAN BE EXPECTED WITH HOURLY RAINFALL
RATES APPROACHING TWO INCHES PER HOUR.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3465 8096 3459 8142 3469 8145 3471 8145
      3475 8147 3477 8145 3482 8148 3484 8146
      3486 8146 3496 8113

BSH
Special weather statement, Aug 18, 6:10 PM EDT, 1 hour 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
610 PM EDT WED AUG 18 2010

NCZ068-SCZ008-009-182245-
CHEROKEE-CLEVELAND-YORK-
610 PM EDT WED AUG 18 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CHEROKEE...
NORTHWESTERN YORK AND SOUTHEASTERN CLEVELAND COUNTIES THROUGH 645 PM
EDT...

AT 608 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR BLACKSBURG...OR 8 MILES EAST OF GAFFNEY...
MOVING NORTHEAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  EARL...
  KINGS MOUNTAIN...

VERY HEAVY RAINFALL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED
WITH THIS STORM.

HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3513 8124 3503 8152 3515 8164 3531 8140
      3520 8131 3516 8132 3516 8127

BSH
Special weather statement, Aug 18, 6:18 PM EDT, 1 hour 39 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
618 PM EDT WED AUG 18 2010

NCZ505-506-182245-
EASTERN MCDOWELL-MCDOWELL MOUNTAINS-
618 PM EDT WED AUG 18 2010

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL MCDOWELL COUNTY THROUGH
645 PM EDT...

AT 617 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES WEST OF MARION...MOVING EAST AT 20 MPH.

THIS STORM WILL BE NEAR...
  MARION...
  GLENWOOD...
  LAKE JAMES...

VERY HEAVY RAINFALL...AND WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED
WITH THIS STORM.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY
ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES.

LAT...LON 3572 8187 3561 8182 3560 8183 3557 8218
      3568 8221 3572 8221 3576 8216 3580 8198

BSH
Special weather statement, Aug 18, 6:51 PM EDT, 1 hour 6 minutes before
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Local storm report, Aug 18, 7:11 PM EDT, 46 minutes before
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Special weather statement, Aug 18, 7:23 PM EDT, 34 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 11:35 PM EDTFlash Flood WarningGSPAlexander, Burke, Caldwell100 min
Aug 18, 11:14 AM EDTFlash Flood WatchGSPAlexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 21 more35 hr
Aug 18, 4:53 PM EDTSpecial Weather StatementGSPBuncombe52 min
Aug 18, 6:12 PM EDTSevere Thunderstorm WarningGSPGaston, Mecklenburg63 min
Aug 18, 6:18 PM EDTSpecial Weather StatementGSPMcDowell27 min
Aug 18, 6:26 PM EDTSevere Thunderstorm WarningGSPBurke, McDowell, Rutherford48 min
Aug 18, 6:51 PM EDTSpecial Weather StatementGSPGaston24 min
Aug 18, 7:23 PM EDTSpecial Weather StatementGSPGaston37 min
Aug 18, 2:53 PM EDTSpecial Weather StatementGSPChester37 min
Aug 18, 4:33 PM EDTSpecial Weather StatementGSPUnion42 min
Aug 18, 5:21 PM EDTSpecial Weather StatementGSPChester39 min
Aug 18, 6:10 PM EDTSpecial Weather StatementGSPCherokee35 min

Nearby

Flash Flood Warnings in North Carolina, 2010Every 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.