Alert archive / South Carolina / Flash Flood Warnings in 2019

Flash Flood Warning 2, NWS Greenville-Spartanburg, SC

April 13, 2019York County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at Apr 13, 2019, 11:33 AM EDT for York County, South Carolina. It was in force for 5 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
Apr 13, 2019, 11:33 AM EDT (15:33 UTC)
Expired
Apr 13, 2019, 4:49 PM EDT
In force
5 hr
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Flood severity
None

County York County, SC

The radar

The Greer radar (KGSP), 95 km from the middle of the area, began a volume at 15:37 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, 3.6 hours before the alert went out and 169 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 2019-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 807 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 12:00Z on 2019-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939587897Sfc1 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
807 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

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 Apr 13, 11:00 AM EDT, 33 minutes earlier.

Area forecast discussion, Apr 13, 11:00 AM EDT, 33 minutes before
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Hazardous weather outlook, Apr 13, 6:05 AM EDT, 5 hours 28 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
605 AM EDT Sat Apr 13 2019

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-141015-
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-
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-Chester-Greenwood-
605 AM EDT Sat Apr 13 2019

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...Today and tonight.

Showers and thunderstorms will be possible through tonight. An
isolated severe thunderstorm or two cannot be rule out.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Widespread strong to severe thunderstorms will be possible Sunday
morning through Sunday evening. The primary threat will be damaging
winds. Large hail and an isolated tornado cannot be ruled out. Heavy
rain may lead to isolated flash flooding, especially in areas that
experience multiple rounds of thunderstorms.

.SPOTTER INFORMATION STATEMENT...

None.

SGL

In the hours before

Special weather statement, Apr 13, 9:37 AM EDT, 1 hour 56 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
937 AM EDT Sat Apr 13 2019

NCZ057-131415-
Rowan NC-
937 AM EDT Sat Apr 13 2019

...A THUNDERSTORM WITH INTENSE LIGHTNING AND TORRENTIAL RAINFALL WILL
IMPACT SOUTHEASTERN ROWAN COUNTY UNTIL 1015 AM EDT...

At 937 AM EDT, Doppler radar was tracking a thunderstorm with intense
lightning and torrential rainfall 4 miles southeast of Salisbury, or
over Granite Quarry, moving northeast at 25 mph.

Locations to be impacted include...
Salisbury, Kannapolis, China Grove, Spencer, Landis, Granite Quarry,
Rockwell, Faith, High Rock Lake and Gold Hill.

Torrential rainfall rates up to 3 inches per hour will be possible in
these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

Frequent lightning is occurring with this storm. If outdoors, try to
get indoors or into a hard topped vehicle. Otherwise, stay away from
open areas and isolated high objects such as trees. When indoors,
stay away from windows and doors and avoid using wired electronic
devices. Do not take a shower or bath. Try to unplug unnecessary
appliances before the storm approaches.

&&

LAT...LON 3550 8023 3551 8064 3576 8047 3573 8045
      3572 8038 3572 8035 3571 8032 3568 8033
      3567 8031 3563 8029 3563 8027 3559 8021
      3555 8021 3553 8019
TIME...MOT...LOC 1337Z 223DEG 21KT 3561 8044

JMP
Special weather statement, Apr 13, 10:22 AM EDT, 1 hour 11 minutes before
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Special weather statement, Apr 13, 10:40 AM EDT, 53 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
1040 AM EDT Sat Apr 13 2019

NCZ071-131515-
Mecklenburg NC-
1040 AM EDT Sat Apr 13 2019

...AN AREA OF HEAVY RAIN WILL IMPACT CENTRAL MECKLENBURG COUNTY UNTIL
1115 AM EDT...

At 1039 AM EDT, Doppler radar indicated the leading edge of an area
of heavy rain along a line extending from 6 miles southwest of
Kannapolis to near Indian Land, and moving northeast at 15 mph.

Locations to be impacted include...
Uptown Charlotte, Huntersville, Central Charlotte, South Charlotte,
Northeast Charlotte, Southwest Charlotte, East Charlotte, Matthews,
Pineville and Freedom Park.

Torrential rainfall rates up to 3 inches per hour will be possible in
these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

&&

LAT...LON 3508 8070 3503 8077 3503 8080 3500 8084
      3510 8093 3551 8080 3542 8075 3540 8077
      3535 8070 3527 8067 3526 8064
TIME...MOT...LOC 1439Z 246DEG 13KT 3545 8072 3502 8090

JMP
Special weather statement, Apr 13, 11:24 AM EDT, 9 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
1124 AM EDT Sat Apr 13 2019

NCZ071-072-082-131630-
Union NC-Cabarrus NC-Mecklenburg NC-
1124 AM EDT Sat Apr 13 2019

...A THUNDERSTORM WITH TORRENTIAL RAINFALL WILL IMPACT SOUTHWESTERN
CABARRUS...SOUTHERN MECKLENBURG AND NORTHWESTERN UNION COUNTIES UNTIL
1230 PM EDT...

At 1123 AM EDT, Doppler radar was tracking a thunderstorm with
torrential rainfall 6 miles northeast of Indian Land, or near The
Arboretum, moving northeast at 10 mph.

Locations to be impacted include...
Uptown Charlotte, Central Charlotte, South Charlotte, Southwest
Charlotte, East Charlotte, Matthews, Mint Hill, Pineville, Freedom
Park and Reedy Creek Park.

Wind gusts up to 40 mph and very heavy rainfall rates up to 2 inches
per hour will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.

&&

LAT...LON 3499 8082 3505 8088 3511 8093 3510 8094
      3514 8098 3535 8070 3520 8054
TIME...MOT...LOC 1523Z 245DEG 17KT 3508 8077

Carroll

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 9:12 AM EDTAreal Flood AdvisoryGSPCabarrus50 min
Apr 13, 9:37 AM EDTSpecial Weather StatementGSPRowan38 min
Apr 13, 9:57 AM EDTFlash Flood WarningGSPCabarrus6 hr
Apr 13, 10:40 AM EDTSpecial Weather StatementGSPMecklenburg35 min
Apr 13, 11:24 AM EDTSpecial Weather StatementGSPMecklenburg66 min
Apr 13, 11:55 AM EDTAreal Flood AdvisoryGSPCabarrus, Mecklenburg, Union6 hr
Apr 13, 12:37 PM EDTAreal Flood AdvisoryGSPGaston, Mecklenburg4 hr
Apr 13, 12:49 PM EDTSpecial Weather StatementGSPUnion41 min
Apr 13, 1:56 PM EDTSpecial Weather StatementGSPMcDowell64 min
Apr 13, 2:07 PM EDTSevere Thunderstorm WarningGSPPolk38 min
Apr 13, 2:43 PM EDTSevere Thunderstorm WarningGSPBurke, Caldwell, McDowell47 min
Apr 13, 3:09 PM EDTTornado WarningGSPBurke, Caldwell36 min
Apr 13, 3:17 PM EDTHigh Wind WarningGSPAvery, Buncombe, Graham, Haywood, Jackson, McDowell and 6 more31 hr
Apr 13, 3:37 PM EDTTornado WarningGSPAlexander, Burke, Caldwell, Catawba19 min
Apr 13, 3:56 PM EDTAreal Flood AdvisoryGSPCabarrus9 hr
Apr 13, 5:46 PM EDTSpecial Weather StatementGSPCleveland29 min
Apr 13, 10:22 AM EDTSpecial Weather StatementGSPYork53 min
Apr 13, 10:47 AM EDTAreal Flood AdvisoryGSPYork55 min
Apr 13, 12:56 PM EDTSpecial Weather StatementGSPGreenville, Pickens49 min
Apr 13, 1:01 PM EDTSevere Thunderstorm WarningGSPGreenville, Pickens44 min
Apr 13, 1:44 PM EDTSpecial Weather StatementGSPGreenville31 min
Apr 13, 4:46 PM EDTAreal Flood WarningGSPYork6 hr

Nearby

Flash Flood Warnings in South Carolina, 2019Every flash flood warning in 2019

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.