Alert archive / South Carolina / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 395, NWS Greenville-Spartanburg, SC

July 11, 2012Anderson County, Greenville County, Laurens County, South Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 11, 2012, 7:18 PM EDT for Anderson County, Greenville County, Laurens County, South Carolina. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 11, 2012, 7:18 PM EDT (23:18 UTC)
Expired: Jul 11, 2012, 8:15 PM EDT
In force: 57 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon

Counties Anderson County, SC, Greenville County, SC, Laurens County, SC

The radar

The Greer radar (KGSP), 30 km from the middle of the area, began a volume at 23:20 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, 11.3 hours before the alert went out and 244 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: 221 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 812 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 46 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 severe thunderstorm 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 severe thunderstorm warning went out at Jul 11, 7:18 PM EDT, 0 minutes earlier.

Area forecast discussion, Jul 11, 7:18 PM EDT, 0 minutes before

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Hazardous weather outlook, Jul 11, 5:19 AM EDT, 13 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
519 AM EDT WED JUL 11 2012

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-121000-
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-
519 AM EDT WED JUL 11 2012

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 ARE IN THE FORECAST FOR TODAY AND
TONIGHT. SOME OF THE THUNDERSTORMS WILL PRODUCE VERY HEAVY
RAIN...AND LOCALIZED FLOODING IS POSSIBLE.

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

A STATIONARY FRONT WILL LINGER ACROSS THE REGION THURSDAY...AND
WILL START MOVING NORTH ON FRIDAY. WITH SHOWERS AND THUNDERSTORMS
EXPECTED THURSDAY AND FRIDAY...EXCESSIVE RAINFALL AND LOCALIZED
FLOODING WILL BE POSSIBLE. THE FRONT WILL LIFT NORTH OF THE AREA
THIS WEEKEND.

.SPOTTER INFORMATION STATEMENT...

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

07

In the hours before

Special weather statement, Jul 11, 6:33 PM EDT, 45 minutes before

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Special weather statement, Jul 11, 6:54 PM EDT, 24 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
Jul 10, 8:14 PM EDT	Areal Flood Advisory	GSP	Mitchell	106 min
Jul 10, 9:35 PM EDT	Areal Flood Advisory	GSP	Burke	100 min
Jul 11, 4:47 PM EDT	Areal Flood Advisory	GSP	Buncombe	3 hr
Jul 11, 5:49 PM EDT	Flash Flood Warning	GSP	Caldwell	4 hr
Jul 11, 6:04 PM EDT	Areal Flood Advisory	GSP	Rutherford	3 hr
Jul 10, 10:50 PM EDT	Areal Flood Advisory	GSP	Cherokee	100 min
Jul 11, 3:19 AM EDT	Areal Flood Advisory	GSP	Cherokee, Greenville, Pickens, Spartanburg	3 hr
Jul 11, 6:33 PM EDT	Special Weather Statement	GSP	Cherokee	42 min
Jul 11, 6:54 PM EDT	Special Weather Statement	GSP	Anderson	51 min
Jul 11, 7:14 PM EDT	Severe Thunderstorm Warning	GSP	York	61 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2012 Every severe thunderstorm warning in 2012

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.