Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

December 30, 2021Abbeville County, Laurens County, Union County, South Carolina; Elbert County, Georgia

NWS Greenville-Spartanburg, SC issued this special weather statement at Dec 30, 2021, 1:08 AM EST for Abbeville County, Laurens County, Union County, South Carolina; Elbert County, Georgia. It was in force for 37 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
Dec 30, 2021, 1:08 AM EST (06:08 UTC)
Expired
Dec 30, 2021, 1:45 AM EST
In force
37 min
Issued by
NWS Greenville-Spartanburg, SC
Hail
0.00 in
Wind
40

Counties Elbert County, GA, Abbeville County, SC, Laurens County, SC, Union County, SC

The radar

The Greer radar (KGSP), 91 km from the middle of the area, began a volume at 06:07 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 00:00Z, 6.1 hours before the alert went out and 196 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, Peachtre/Fal Fld, GA at 00:00Z on 2021-12-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 251 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, Peachtre/Fal Fld, GA at 00:00Z on 2021-12-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 square meters per square second.19395878Sfc1 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
251 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
790 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.0

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 Dec 29, 6:46 PM EST, 6 hours 22 minutes earlier.

Area forecast discussion, Dec 29, 6:46 PM EST, 6 hours 22 minutes before
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Hazardous weather outlook, Dec 29, 10:23 PM EST, 2 hours 45 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
1023 PM EST Wed Dec 29 2021

GAZ010-017-018-026-028-029-NCZ051-052-058-059-062>065-SCZ001>006-010-
310330-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Swain-Haywood-Graham-
Northern Jackson-Macon-Southern Jackson-Transylvania-Henderson-
Oconee Mountains-Pickens Mountains-Greenville Mountains-
Greater Oconee-Greater Pickens-Greater Greenville-Anderson-
1023 PM EST Wed Dec 29 2021

...TORNADO WATCH 571 IN EFFECT UNTIL 5 AM EST THURSDAY...

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

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.

Numerous showers and embedded thunderstorms are expected to move in
from the west and cross the area overnight. A few storms may be
strong to severe, bringing a threat of damaging wind gusts, large
hail, and isolated tornadoes. Storms should weaken as they track east
toward the I-77 corridor near daybreak Thursday.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Additional showers and storms may develop Thursday afternoon, with a
few strong storms possible mainly across the Piedmont. Another round
of showers with embedded thunderstorms is expected Friday, with a
few strong storms possible across the area.

Another dynamic storm system will cross the area over the weekend,
bringing yet another round of showers and embedded thunderstorms. A
few severe storms may be possible Saturday night into Sunday, but
there is still a lot of uncertainty in the exact strength and timing
of this system.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

NCZ033-035>037-048>050-053-056-057-068>072-082-501>510-SCZ007>009-
011>014-019-310330-
Avery-Alexander-Iredell-Davie-Madison-Yancey-Mitchell-Buncombe-
Catawba-Rowan-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-Spartanburg-Cherokee-
York-Abbeville-Laurens-Union SC-Chester-Greenwood-
1023 PM EST Wed Dec 29 2021

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

.DAY ONE...Tonight.

Numerous showers and embedded thunderstorms are expected to move in
from the west late this evening and cross the area overnight. A few
storms may be strong to severe, bringing a threat of damaging wind
gusts, large hail, and isolated tornadoes. Storms should weaken as
they track east toward the I-77 corridor near daybreak Thursday.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Additional showers and storms may develop Thursday afternoon, with a
few strong storms possible mainly across the Piedmont. Another round
of showers with embedded thunderstorms is expected Friday, with a
few strong storms possible across the area.

Another dynamic storm system will cross the area over the weekend,
bringing yet another round of showers and embedded thunderstorms. A
few severe storms may be possible Saturday night into Sunday, but
there is still a lot of uncertainty in the exact strength and timing
of this system.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

MPR

In the hours before

Special weather statement, Dec 29, 11:48 PM EST, 1 hour 20 minutes before
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Special weather statement, Dec 30, 12:00 AM EST, 1 hour 8 minutes before
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Special weather statement, Dec 30, 12:01 AM EST, 1 hour 7 minutes before
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Special weather statement, Dec 30, 12:25 AM EST, 43 minutes before
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Special weather statement, Dec 30, 12:43 AM EST, 25 minutes before
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Special weather statement, Dec 30, 1:08 AM EST, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 29, 9:59 PM ESTSpecial Weather StatementGSPGraham, Jackson46 min
Dec 29, 10:46 PM ESTSpecial Weather StatementGSPJackson, Macon, Transylvania44 min
Dec 29, 11:21 PM ESTSpecial Weather StatementGSPHenderson, Polk, Transylvania39 min
Dec 30, 12:00 AM ESTSpecial Weather StatementGSPPolk45 min
Dec 30, 12:01 AM ESTSpecial Weather StatementGSPPolk44 min
Dec 30, 12:43 AM ESTSpecial Weather StatementGSPGaston47 min
Dec 30, 2:42 AM ESTSpecial Weather StatementGSPUnion18 min
Dec 29, 11:48 PM ESTSpecial Weather StatementGSPOconee42 min
Dec 30, 12:25 AM ESTSpecial Weather StatementGSPAnderson50 min
Dec 30, 1:44 AM ESTSpecial Weather StatementGSPChester, Greenwood, Union, York46 min

Nearby

Special Weather Statements in South Carolina, 2021Special Weather Statements in Georgia, 2021Every special weather statement in 2021

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.