Alert archive / Georgia / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

December 11, 2021Oconee County, South Carolina; 4 counties in Georgia

NWS Greenville-Spartanburg, SC issued this special weather statement at Dec 11, 2021, 1:48 PM EST for Oconee County, South Carolina; 4 counties in Georgia. 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 outline as issued.

The facts

Issued
Dec 11, 2021, 1:48 PM EST (18:48 UTC)
Expired
Dec 11, 2021, 2:45 PM EST
In force
57 min
Issued by
NWS Greenville-Spartanburg, SC
Hail
0.25 in
Wind
50

Counties Franklin County, GA, Habersham County, GA, Hart County, GA, Stephens County, GA, Oconee County, SC

The radar

The Greer radar (KGSP), 110 km from the middle of the area, began a volume at 18:49 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, 6.8 hours before the alert went out and 164 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 12:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 182 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 12:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 268 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
182 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
268 m²/s²
0-3 km storm-relative helicity
271 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.8

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 11, 9:47 AM EST, 4 hours 1 minute earlier.

Area forecast discussion, Dec 11, 9:47 AM EST, 4 hours 1 minute before
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Hazardous weather outlook, Dec 11, 12:05 PM EST, 1 hour 43 minutes before
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In the hours before

Special weather statement, Dec 11, 11:33 AM EST, 2 hours 15 minutes before
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Local storm report, Dec 11, 12:39 PM EST, 1 hour 9 minutes before
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Special weather statement, Dec 11, 12:45 PM EST, 1 hour 3 minutes before
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Special weather statement, Dec 11, 12:51 PM EST, 57 minutes before
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Special weather statement, Dec 11, 1:21 PM EST, 27 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
121 PM EST Sat Dec 11 2021

GAZ010-017-018-SCZ001-111900-
Rabun GA-Stephens GA-Habersham GA-Oconee Mountains SC-
121 PM EST Sat Dec 11 2021

...Strong thunderstorms will impact portions of Stephens, Habersham,
southwestern Rabun and western Oconee Counties through 200 PM EST...

At 121 PM EST, Doppler radar was tracking strong thunderstorms along
a line extending from 11 miles south of Hiawassee to 7 miles east of
Dawsonville. Movement was east at 45 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Toccoa, Clayton, Clarkesville, Cornelia, Baldwin, Demorest, Mount
Airy, Alto, Tiger and Tallulah Falls.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Conditions are favorable for development of a very brief, weak
tornado. Be prepared to take immediate action if a tornado is sighted
or a Tornado Warning is issued.

&&

LAT...LON 3454 8362 3460 8365 3462 8364 3465 8366
      3468 8364 3471 8364 3474 8362 3477 8363
      3478 8366 3489 8340 3448 8319 3447 8338
      3446 8340 3448 8347 3449 8354 3443 8362
      3450 8367
TIME...MOT...LOC 1821Z 274DEG 38KT 3479 8378 3442 8398

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

RM
Special weather statement, Dec 11, 1:48 PM EST, 0 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
148 PM EST Sat Dec 11 2021

GAZ010-017-018-026-028-029-SCZ001-004-005-010-111945-
Elbert GA-Hart GA-Franklin GA-Rabun GA-Stephens GA-Habersham GA-
Greater Pickens SC-Greater Oconee SC-Anderson SC-Oconee Mountains SC-
148 PM EST Sat Dec 11 2021

...Strong thunderstorms will impact portions of Franklin, Stephens,
north central Elbert, central Habersham, south central Rabun, Hart,
western Anderson, southwestern Pickens and Oconee Counties through
245 PM EST...

At 147 PM EST, Doppler radar was tracking strong thunderstorms along
a line extending from 4 miles south of Clayton to near Homer.
Movement was east at 50 mph.

HAZARD...Wind gusts up to 50 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Clemson, Toccoa, Seneca, Hartwell, Walhalla, Clarkesville,
Carnesville, Anderson, Homeland Park and Central.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Conditions are favorable for development of a very brief, weak
tornado. Be prepared to take immediate action if a tornado is sighted
or a Tornado Warning is issued.

&&

LAT...LON 3438 8339 3443 8338 3446 8340 3448 8345
      3449 8354 3445 8359 3444 8361 3445 8361
      3485 8349 3472 8261 3423 8271 3421 8274
TIME...MOT...LOC 1847Z 285DEG 46KT 3481 8340 3434 8353

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH

RM

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 8:32 PM ESTDense Fog AdvisoryGSPAlexander, Burke, Cabarrus, Caldwell, Catawba, Cleveland and 10 more15 hr
Dec 11, 3:35 AM ESTWind AdvisoryGSPAvery, Graham, Haywood, Jackson, Macon, Madison and 4 more24 hr
Dec 11, 11:33 AM ESTSpecial Weather StatementGSPGraham, Haywood, Madison, Swain72 min
Dec 11, 12:45 PM ESTSpecial Weather StatementGSPBuncombe, Haywood, Jackson, Macon, Madison75 min
Dec 11, 12:51 PM ESTSpecial Weather StatementGSPAvery, Mitchell, Yancey54 min
Dec 11, 3:08 PM ESTSpecial Weather StatementGSPAlexander, Burke, Caldwell, Catawba, Cleveland, Iredell and 3 more67 min
Dec 11, 3:43 PM ESTSpecial Weather StatementGSPAlexander, Catawba, Cleveland, Gaston, Iredell, Lincoln47 min
Dec 11, 4:16 PM ESTSpecial Weather StatementGSPCabarrus, Davie, Gaston, Iredell, Lincoln, Mecklenburg and 1 more59 min
Dec 11, 5:08 PM ESTSpecial Weather StatementGSPCabarrus, Mecklenburg, Union67 min
Dec 11, 2:29 PM ESTSpecial Weather StatementGSPPickens31 min
Dec 11, 2:52 PM ESTSpecial Weather StatementGSPAnderson53 min
Dec 11, 3:02 PM ESTSpecial Weather StatementGSPGreenville, Spartanburg43 min
Dec 11, 3:36 PM ESTSpecial Weather StatementGSPAbbeville, Greenwood, Laurens, Union39 min
Dec 11, 4:13 PM ESTSpecial Weather StatementGSPChester, Greenwood, Union62 min
Dec 11, 5:10 PM ESTSpecial Weather StatementGSPChester35 min
Dec 11, 1:21 PM ESTSpecial Weather StatementGSPHabersham, Rabun, Stephens39 min

Nearby

Special Weather Statements in Georgia, 2021Special Weather Statements in South Carolina, 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.