Alert archive / North Carolina / Special Weather Statements in 2018

Special Weather Statement, NWS Greenville-Spartanburg, SC

August 12, 2018Polk County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Aug 12, 2018, 4:11 PM EDT for Polk County, North Carolina. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 12, 2018, 4:11 PM EDT (20:11 UTC)
Expired
Aug 12, 2018, 4:45 PM EDT
In force
34 min
Issued by
NWS Greenville-Spartanburg, SC

County Polk County, NC

The radar

The Greer radar (KGSP), 59 km from the middle of the area, began a volume at 20:13 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, 8.2 hours before the alert went out and 219 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 2018-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 445 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 2018-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.193958Sfc1 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
445 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
1179 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 12, 3:02 PM EDT, 1 hour 9 minutes earlier.

Area forecast discussion, Aug 12, 3:02 PM EDT, 1 hour 9 minutes before
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Hazardous weather outlook, Aug 12, 4:30 AM EDT, 11 hours 41 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
430 AM EDT Sun Aug 12 2018

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-130830-
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-
430 AM EDT Sun Aug 12 2018

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

.DAY ONE...Today and tonight.

Scattered to numerous thunderstorms are expected to develop this
afternoon and evening. A few of these storms could become severe with
damaging wind gusts. Isolated flooding will also be possible. Any
storm will be capable of producing strong wind gusts, heavy rainfall,
and cloud to ground lightning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

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 12, 2:57 PM EDT, 1 hour 14 minutes before
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Special weather statement, Aug 12, 3:07 PM EDT, 1 hour 4 minutes before
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Special weather statement, Aug 12, 3:26 PM EDT, 45 minutes before
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Special weather statement, Aug 12, 3:44 PM EDT, 27 minutes before
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Special weather statement, Aug 12, 4:06 PM EDT, 5 minutes before
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Special weather statement, Aug 12, 4:11 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 12:50 PM EDTSpecial Weather StatementGSPCaldwell40 min
Aug 12, 2:53 PM EDTAreal Flood AdvisoryGSPCaldwell112 min
Aug 12, 2:57 PM EDTSpecial Weather StatementGSPIredell33 min
Aug 12, 3:07 PM EDTSpecial Weather StatementGSPAlexander23 min
Aug 12, 3:26 PM EDTSpecial Weather StatementGSPDavie34 min
Aug 12, 3:44 PM EDTSpecial Weather StatementGSPCaldwell31 min
Aug 12, 3:58 PM EDTAreal Flood AdvisoryGSPCaldwell80 min
Aug 12, 4:06 PM EDTSpecial Weather StatementGSPHenderson24 min
Aug 12, 4:27 PM EDTSpecial Weather StatementGSPCatawba33 min
Aug 12, 4:31 PM EDTSpecial Weather StatementGSPHenderson14 min
Aug 12, 4:51 PM EDTSpecial Weather StatementGSPPolk24 min
Aug 12, 5:00 PM EDTSpecial Weather StatementGSPCatawba15 min
Aug 12, 5:14 PM EDTSpecial Weather StatementGSPPolk46 min
Aug 12, 5:16 PM EDTSpecial Weather StatementGSPBurke29 min
Aug 12, 5:32 PM EDTSpecial Weather StatementGSPHenderson28 min
Aug 12, 5:48 PM EDTSpecial Weather StatementGSPRowan27 min
Aug 12, 5:56 PM EDTSpecial Weather StatementGSPCabarrus19 min
Aug 12, 6:01 PM EDTSpecial Weather StatementGSPPolk29 min
Aug 12, 6:19 PM EDTAreal Flood AdvisoryGSPCabarrus56 min
Aug 12, 6:23 PM EDTSpecial Weather StatementGSPCabarrus37 min
Aug 12, 6:25 PM EDTSpecial Weather StatementGSPDavidson20 min
Aug 12, 6:41 PM EDTSevere Thunderstorm WarningGSPRowan34 min
Aug 12, 7:13 PM EDTAreal Flood AdvisoryGSPCabarrus62 min
Aug 12, 7:50 PM EDTSpecial Weather StatementGSPCleveland25 min
Aug 12, 7:30 PM EDTSpecial Weather StatementGSPChester15 min
Aug 12, 2:21 PM EDTSpecial Weather StatementGSPHabersham24 min

Nearby

Special Weather Statements in North Carolina, 2018Every special weather statement in 2018

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.