Alert archive / South Carolina / Flash Flood Warnings in 2010

Flash Flood Warning 22, NWS Greenville-Spartanburg, SC

May 31, 2010Cherokee County, Spartanburg County, Union County, South Carolina

NWS Greenville-Spartanburg, SC issued this flash flood warning at May 31, 2010, 12:21 PM EDT for Cherokee County, Spartanburg County, Union County, South 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: May 31, 2010, 12:21 PM EDT (16:21 UTC)
Expired: May 31, 2010, 3:15 PM EDT
In force: 3 hr
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Flood severity: None

Counties Cherokee County, SC, Spartanburg County, SC, Union County, SC

The radar

The Greer radar (KGSP), 43 km from the middle of the area, began a volume at 16:24 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, 4.4 hours before the alert went out and 305 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: 847 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 482 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

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 31, 11:25 AM EDT, 56 minutes earlier.

Area forecast discussion, May 31, 11:25 AM EDT, 56 minutes before

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Hazardous weather outlook, May 31, 10:41 AM EDT, 1 hour 40 minutes before

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In the hours before

Special weather statement, May 31, 7:35 AM EDT, 4 hours 46 minutes before

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Special weather statement, May 31, 8:06 AM EDT, 4 hours 15 minutes before

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Special weather statement, May 31, 11:01 AM EDT, 1 hour 20 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 7:26 AM EDT	Flash Flood Watch	GSP	Cabarrus, Henderson, Jackson, Macon, Mecklenburg, Polk and 2 more	20 hr
May 31, 9:43 AM EDT	Areal Flood Advisory	GSP	Cleveland	107 min
May 31, 12:45 PM EDT	Areal Flood Advisory	GSP	Mecklenburg, Union	105 min
May 31, 2:29 PM EDT	Flash Flood Warning	GSP	Mecklenburg, Union	3 hr
May 31, 8:49 AM EDT	Areal Flood Advisory	GSP	Spartanburg, Union	116 min
May 31, 10:18 AM EDT	Flash Flood Warning	GSP	Greenville	4 hr
May 31, 11:01 AM EDT	Areal Flood Advisory	GSP	Anderson	104 min
May 31, 11:01 AM EDT	Special Weather Statement	GSP	Spartanburg	59 min
May 31, 11:57 AM EDT	Areal Flood Advisory	GSP	Greenville	108 min
May 31, 12:40 PM EDT	Areal Flood Advisory	GSP	Laurens	50 min
May 31, 4:58 PM EDT	Special Weather Statement	GSP	Rabun	47 min

Nearby

Flash Flood Warnings in South 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.