Alert archive / North Carolina / Flash Flood Warnings in 2010

Flash Flood Warning 19, NWS Greenville-Spartanburg, SC

May 28, 2010Macon County, North Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at May 28, 2010, 2:20 PM EDT for Macon County, North Carolina. It was in force for 2 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: May 28, 2010, 2:20 PM EDT (18:20 UTC)
Expired: May 28, 2010, 4:49 PM EDT
In force: 2 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

County Macon County, NC

The radar

The Knoxville radar (KMRX), 113 km from the middle of the area, began a volume at 18:20 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 221 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: 516 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1418 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -5 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 May 28, 12:25 PM EDT, 1 hour 55 minutes earlier.

Area forecast discussion, May 28, 12:25 PM EDT, 1 hour 55 minutes before

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Hazardous weather outlook, May 28, 10:40 AM EDT, 3 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1040 AM EDT FRI MAY 28 2010

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-291445-
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-
1040 AM EDT FRI MAY 28 2010

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

.DAY ONE...TODAY AND TONIGHT.

THUNDERSTORM COVERAGE WILL INCREASE ACROSS THE REGION THIS
AFTERNOON. SOME THUNDERSTORMS MAY BECOME SEVERE...PRODUCING LARGE
HAIL AND DAMAGING WIND GUSTS DURING THE AFTERNOON AND TONIGHT.
SOME OF THE THUNDERSTORMS COULD ALSO PRODUCE VERY HEAVY
RAINFALL... RESULTING IN LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

MORE THUNDERSTORMS ARE EXPECTED ACROSS THE AREA ON SATURDAY.
THOUGH THE THREAT OF SEVERE THUNDERSTORMS IS LESS THAN ON
FRIDAY...A COUPLE OF THESE STORMS COULD BECOME STRONG ENOUGH TO
PRODUCE LARGE HAIL AND DAMAGING WIND GUSTS.

.SPOTTER INFORMATION STATEMENT...

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

LGL

In the hours before

Special weather statement, May 28, 8:44 AM EDT, 5 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
844 AM EDT FRI MAY 28 2010

NCZ068-506-508-281330-
CLEVELAND-EASTERN MCDOWELL-GREATER RUTHERFORD-
844 AM EDT FRI MAY 28 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN RUTHERFORD...
NORTHWESTERN CLEVELAND AND SOUTHEASTERN MCDOWELL COUNTIES THROUGH 930
AM EDT...

AT 836 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR LAWNDALE...OR 11 MILES NORTH OF SHELBY...
MOVING WEST AT 15 MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO BOSTIC...
  THERMAL CITY...SUNSHINE...SPINDALE...RUTHERFORDTON...FERO...
  POLKVILLE...KINGSTOWN AND CASAR.

CLOUD TO GROUND LIGHTNING...PEA SIZE HAIL...AND WIND GUSTS UP TO 40
MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3554 8157 3536 8158 3534 8207 3556 8206
      3559 8203

JPT

Special weather statement, May 28, 10:42 AM EDT, 3 hours 38 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1042 AM EDT FRI MAY 28 2010

NCZ049-050-505-281515-
MCDOWELL MOUNTAINS-MITCHELL-YANCEY-
1042 AM EDT FRI MAY 28 2010

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL MCDOWELL...SOUTHEASTERN
MITCHELL AND SOUTHEASTERN YANCEY COUNTIES THROUGH 1115 AM EDT...

AT 1036 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 4 MILES SOUTHWEST OF MARION...MOVING NORTHWEST AT
10 MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO WOODLAWN...
  OLD FORT...SPRUCE PINE...MOUNT MITCHELL STATE PARK...CELO AND
  BUSICK.

DANGEROUS CLOUD TO GROUND LIGHTNING...PEA SIZE HAIL...AND WIND GUSTS
OF 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.

LAT...LON 3596 8207 3574 8198 3570 8204 3569 8204
      3566 8205 3562 8217 3586 8233

JPT

Special weather statement, May 28, 11:28 AM EDT, 2 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1128 AM EDT FRI MAY 28 2010

NCZ503>505-281600-
BURKE MOUNTAINS-GREATER BURKE-MCDOWELL MOUNTAINS-
1128 AM EDT FRI MAY 28 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN MCDOWELL AND WESTERN
BURKE COUNTIES THROUGH NOON EDT...

AT 1126 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR MORGANTON...MOVING NORTHWEST AT 15 MPH.

* OTHER LOCATIONS AFFECTED INCLUDE BUT ARE NOT LIMITED TO TABLE
  ROCK...MORGANTON...GLEN ALPINE...WOODLAWN AND ASHFORD.

SMALL HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3581 8164 3565 8175 3569 8186 3572 8187
      3577 8194 3574 8199 3578 8208 3587 8202
      3587 8199 3591 8199 3591 8195 3594 8196
      3597 8194

JPT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 8:44 AM EDT	Special Weather Statement	GSP	Rutherford	46 min
May 28, 10:42 AM EDT	Special Weather Statement	GSP	McDowell	33 min
May 28, 11:28 AM EDT	Special Weather Statement	GSP	Burke	32 min
May 28, 11:32 AM EDT	Severe Thunderstorm Warning	GSP	Burke	43 min
May 28, 12:17 PM EDT	Flash Flood Watch	GSP	Avery, Buncombe, Burke, Caldwell, Graham, Haywood and 11 more	16 hr
May 28, 1:06 PM EDT	Severe Thunderstorm Warning	GSP	Jackson, Macon, Swain	27 min
May 28, 1:30 PM EDT	Severe Thunderstorm Warning	GSP	Jackson, Macon, Swain	45 min
May 28, 2:02 PM EDT	Flash Flood Warning	GSP	Jackson	3 hr
May 28, 2:48 PM EDT	Flash Flood Warning	GSP	Madison	105 min
May 28, 3:50 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland	55 min
May 28, 4:15 PM EDT	Special Weather Statement	GSP	Lincoln	45 min
May 28, 4:23 PM EDT	Special Weather Statement	GSP	Henderson	52 min
May 28, 4:24 PM EDT	Severe Thunderstorm Warning	GSP	Gaston, Lincoln, Mecklenburg	66 min
May 28, 4:28 PM EDT	Severe Thunderstorm Warning	GSP	Cleveland, Rutherford	62 min
May 28, 4:42 PM EDT	Severe Thunderstorm Warning	GSP	Union	63 min
May 28, 4:54 PM EDT	Areal Flood Advisory	GSP	Union	111 min
May 28, 4:54 PM EDT	Special Weather Statement	GSP	Henderson	51 min
May 28, 4:59 PM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Henderson, Transylvania	46 min
May 28, 5:07 PM EDT	Severe Thunderstorm Warning	GSP	Cabarrus, Catawba, Iredell, Lincoln, Mecklenburg	53 min
May 28, 5:15 PM EDT	Severe Thunderstorm Warning	GSP	Polk, Rutherford	49 min
May 28, 5:18 PM EDT	Areal Flood Advisory	GSP	Mecklenburg	117 min
May 28, 5:24 PM EDT	Severe Thunderstorm Warning	GSP	Burke, McDowell, Rutherford	66 min
May 28, 5:38 PM EDT	Severe Thunderstorm Warning	GSP	Alexander, Burke, Caldwell, Catawba	52 min
May 28, 5:54 PM EDT	Severe Thunderstorm Warning	GSP	Iredell, Rowan	66 min
May 28, 6:02 PM EDT	Special Weather Statement	GSP	Cabarrus	43 min
May 28, 6:29 PM EDT	Severe Thunderstorm Warning	GSP	Davie, Iredell, Rowan	61 min
May 28, 7:14 PM EDT	Special Weather Statement	GSP	Buncombe	46 min
May 28, 2:19 PM EDT	Severe Thunderstorm Warning	GSP	Cherokee, York	56 min
May 28, 2:38 PM EDT	Severe Thunderstorm Warning	GSP	Chester, York	67 min
May 28, 3:10 PM EDT	Severe Thunderstorm Warning	GSP	York	46 min
May 28, 5:46 PM EDT	Special Weather Statement	GSP	Greenville	44 min
May 28, 7:04 PM EDT	Special Weather Statement	GSP	Laurens	41 min
May 28, 7:17 PM EDT	Severe Thunderstorm Warning	GSP	Laurens, Spartanburg	58 min
May 28, 7:29 PM EDT	Special Weather Statement	GSP	Anderson	46 min
May 28, 7:33 PM EDT	Severe Thunderstorm Warning	GSP	Greenville, Laurens	57 min
May 28, 7:35 PM EDT	Severe Thunderstorm Warning	GSP	Anderson, Pickens	55 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.