South Carolina, 2014

Hail and Damaging Winds in South Carolina, August 20, 2014

August 20, 2014 · NWS GSP · 5 events in 2 counties and zones

Scattered thunderstorms developed over the South Carolina mountains and foothills during the late afternoon and early evening. A couple of storms became briefly severe, producing locally damaging winds and hail.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$100,000
Crop damage
None recorded
Events
5

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GSP wrote it up.

Scattered thunderstorms developed over the South Carolina mountains and foothills during the late afternoon and early evening. A couple of storms became briefly severe, producing locally damaging winds and hail.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Aug 20, 1:05 PM EST, 50 minutes earlier.

Area forecast discussion, Aug 20, 1:05 PM EST, 50 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
205 PM EDT WED AUG 20 2014

.SYNOPSIS...
A BROAD UPPER LEVEL RIDGE OF HIGH PRESSURE WILL BUILD ACROSS THE
MISSISSIPPI RIVER VALLEY OVER THE NEXT FEW DAYS AND LINGER FOR THE
REST OF THE WORK WEEK...RESULTING IN ABOVE NORMAL TEMPERATURES. A
WEAK COLD FRONT WILL THEN PUSH INTO THE AREA FROM NORTHEAST SATURDAY
AND BRING SOME MINOR RELIEF FROM THE HEAT.

&&

.NEAR TERM /THROUGH TONIGHT/...
AS OF 155 PM...PERSISTENT SMALL STRONG TO OCCASIONALLY SEVERE
CONVECTIVE CLUSTER CONTINUES TO DROP SOUTHEAST ACROSS THE NC
FOOTHILLS. SCT CONVECTION IS FINALLY BEGINNING TO UNZIP A BIT ALONG
THE OUTFLOW BOUNDARY ALONG THE I-40 CORRIDOR INTO THE NW PIEDMONT.
OTHERWISE...THE LATEST SPC MESOANALYSIS DEPICTS A MINIMUM IN CAPE
ACROSS THE AREA...WITH CAPE EXCEEDING 3000 J/KG JUST TO OUR EAST...
AND MORE THAN 4000 J/KG ACROSS EAST TENN INTO NRN/CTRL GEORGIA. THIS
IS WHERE THE BEST CONVECTIVE COVERAGE IS ONGOING. WE HAVE DELAYED
THE BEST POPS UNTIL LATE IN THE AFTERNOON AND TOWARD EARLY
EVENING...WHEN INSTABILITY SHOULD BE GREATEST AND CHANCES WILL ALSO
INCREASE FOR UPSTREAM ACTIVITY...POSSIBLY ORGANIZING UPSCALE...TO
MOVE INTO THE FORECAST AREA. BRIEF LARGE HAIL AND DAMAGING WINDS
WILL REMAIN POSSIBLE...WITH DOWNBURST POTENTIAL ENHANCED WITH ANY
ORGANIZED CLUSTERS.

AS OF 11 AM...A SMALL CLUSTER OF DEEP CONVECTION IS APPROACHING THE
NORTHERN NC MTNS ATTM...THUS POPS HAVE BEEN INCREASED TO LIKELY IN
THE AREAS NORTH OF I-26 ALONG THE TENN BORDER. THE PREVIOUS REMNANT
CONVECTIVE AREA DISSIPATED AS IT MOVED EAST OF THE MTNS. HOWEVER...
THE ATMOSPHERE IS HEATING STRONGLY DOWNSTREAM OF THE HIGH TERRAIN.
REGIONAL RAOBS PAINTED A RATHER STARK CONTRAST FROM THIS TIME
YESTERDAY...ESP AT KFFC...WHERE A LAYER OF NEAR-DRY ADIABATIC LAPSE
RATES WERE OBSERVED BETWEEN H8 AND H6. AS A RESULT...THE AIRMASS IS
RAPIDLY DESTABILIZING EAST OF THE MTNS...WITH CAPE ALREADY EXCEEDING
1500 J/KG ACROSS THE FOOTHILLS AS OF 14Z. IT APPEARS LIKELY THAT
CAPE WILL INCREASE TO THE NEIGHBORHOOD OF 3000 J/KG THIS AFTERNOON.
CONVECTION IS ALREADY SHOWING SIGNS OF FANNING OUT ALONG THE OUTFLOW
BOUNDARY ACROSS NORTHEAST TENN...AND WITH CAPE INCREASING STRONGLY
DOWNSTREAM...IT SEEMS ENTIRELY PLAUSIBLE THAT SCATTERED CONVECTION
WILL CONTINUE TO DEVELOP ALONG THE BOUNDARY AS IT PUSHES EAST OF THE
MTNS BY EARLY AFTERNOON (THE LATEST HRRR IS SUGGESTING A SIMILAR
SCENARIO). AS SUCH...POPS HAVE BEEN INCREASED BY 10-20 PERCENT IN
MOST AREAS THIS AFTERNOON...WITH 40 POPS NOW BEING FEATURED AS FAR
SOUTHEAST AS THE I-85 CORRIDOR.

POPS HAVE ALSO BEE INCREASED FOR THIS EVENING. AN AXIS OF CAPE >
3000 IS ALREADY BEING ANALYZED ACROSS MIDDLE TENN INTO SE KENTUCKY.
SHORT TERM GUIDANCE ALSO DEPICTS A CORRIDOR OF 20-30KTS OF LOW LEVEL
SHEAR THIS AFTERNOON FROM EASTERN KENTUCKY INTO SOUTHWEST NC. A
CONSENSUS OF MESOSCALE MODEL GUIDANCE WOULD SUGGEST ORGANIZED MCS
DEVELOPMENT IN THESE AREAS BY LATE AFTERNOON...POSSIBLY DROPPING
SOUTHEAST INTO THE FORECAST AREA THIS EVENING. HOW THIS PLAYS OUT
FOR OUR AREA MAY DEPEND LARGELY UPON THIS AFTERNOON/S CONVECTIVE
EVOLUTION...BUT IT SEEMS THE AREA MOST LIKELY TO BE AFFECTED WOULD
BE ACROSS (ROUGHLY) THE NORTHWEST HALF OF THE FORECAST AREA...WHERE
POPS WERE INCREASED TO 40-50 PERCENT THIS EVENING. LOWERING FREEZING
LEVELS AND LARGE DCAPE SHOULD SUPPORT A RISK OF ISOLATED LARGE HAIL
AS WELL AS DAMAGING WINDS...WITH THE POTENTIAL FOR AN ENHANCED
DOWNBURST RISK WITH ANY UPSCALE ORGANIZATION.

1030 UTC UPDATE...POPS HAVE BEEN ADJUSTED PER RADAR TRENDS...WITH A
DECREASE EARLY ON. SKY COVER WAS UPDATED FROM INFRARED SATELLITE
IMAGERY...ALSO RESULTING IN A DECREASE. AREAS OF FOG WERE REDUCED
BASED ON OBSERVATIONS AND DEW POINT DEPRESSIONS.

AT 300 AM EDT TUESDAY...AN UPPER TROUGH WILL AMPLIFY ALONG THE EAST
COAST TODAY...WHILE AN UPPER RIDGE BUILDS NORTH OVER THE MS RIVER
VALLEY. SEVERAL WEAK SHORTWAVES WILL CROSS OUR AREA TODAY AND
TONIGHT IN NW FLOW ALOFT....WHILE A COLD FRONT ADVANCES SLOWLY FORM
THE NE. IT IS UNCLEAR WHETHER THE FRONT WILL MAKE IT VERY FAR INTO
OUR AREA...BUT ITS GENERAL PROXIMITY MAY FOCUS CONVECTION ACROSS OUR
NORTHERN TIER OF COUNTIES. EVEN IF THE FRONT REMAINS OFF TO THE
NORTHEAST...OUR AREA WILL BE IN A MOIST UNSTABLE AIR MASS...AND
PASSING SHORTWAVES WILL PROVIDE SUPPORT FOR CONVECTION. MOISTURE
WILL BE SOMEWHAT LIMITED...AND STEERING FLOW GREAT ENOUGH TO KEEP
CELLS MOVING...LIMITING THE POTENTIAL FOR HEAVY RAINFALL. ROBUST
CAPE WILL BE PRESENT...AND DRY AIR WILL BE AVAILABLE FOR EVAPORATIVE
COOLING...PROVIDING SUPPORT FOR WIND GUSTS AND HAIL. HIGH
TEMPERATURES WILL BE SLIGHTLY ABOVE NORMAL.

SOME ELEVATED INSTABILITY WILL LINGER THROUGH TONIGHT...AND IF ANY
MCS ROUNDING THE CORNER OF THE RIDGE REACHES OUR AREA...IT MAY WELL
SURVIVE. STEERING FLOW AND A LACK OF DEEP MOISTURE WILL LIMIT HEAVY
RAINFALL POTENTIAL. MINIMUM TEMPERATURES WILL RUN ABOVE NORMAL IN A
MOIST AIRMASS.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
AS OF 300 AM WEDNESDAY...A LARGE UPPER RIDGE WILL PERSIST ACRS THE
LWR-MID MS VALLEY...EXTENDING EAST ACRS THE SOUTHEAST STATES THRU
THE SHORT TERM. THE LATEST GUIDANCE SHOWS THAT A RING OF FIRE
PATTERN WILL SET UP...WITH A SERIES OF SHORTWAVES AND ASSOCIATED
CLUSTERS OF CONVECTION WILL RIDE OVER TOP OF THE RIDGE...FROM THE
UPR MIDWEST/SRN GREAT LAKES...TO THE MID ATLANTIC. IT LOOKS LIKE
MOST OF THE ASSOCIATED ACTIVITY WILL STAY NORTH OF THE CWFA.
HOWEVER...THE NRN ZONES (GENERALLY I-40 CORRIDOR AND NORTH)...MAY
GET BRUSHED BY A POSSIBLE MCS AT SOME POINT. NOT MUCH CHANGE WAS
MADE TO THE POPS. STILL EXPECT AT LEAST A HANDFUL OF
DIURNALLY-DRIVEN CONVECTION...AS STEEP MID LVL LAPSE RATES REMAIN
ATOP THE REGION. MODELS ARE TRENDING WARMER FOR THURSDAY AND
FRIDAY...SO I BUMPED UP TEMPS ABOUT A CATEGORY...EVEN MORE IN THE NW
NC PIEDMONT...WHERE WE PREVIOUSLY THOUGHT A BACKDOOR COLD FRONT
WOULD PUSH IN BY FRIDAY. THIS RESULTS IN ABOVE NORMAL TEMPS...WITH
UPR 80S IN THE MTN VALLEYS AND MID-UPR 90S ACRS THE PIEDMONT.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
AS OF 1230 PM WEDNESDAY...MEDIUM RANGE MODELS ARE IN DECENT ENUF
AGREEMENT WITH RESPECT TO THE MEAN PATTERN FOR THE FIRST HALF OF THE
EXTENDED PERIOD FEATURING LLVL RIDGING POKING SSW INTO THE CWFA. THE
COMBINATION OF THE LLVL EASTERLY FLOW AND THE HIGHLY AMPLIFIED NLY
FLOW SHOULD RESULT IN ENUF FORCING FOR AT LEAST SCATTERED
SHOWERS...AND MAX TEMPERATURES A FEW DEG F BELOW PERSISTENCE AND A
CATEGORY OR TWO BELOW CLIMO SUNDAY AND MONDAY.

WITH LLVL RIDGING LIKELY TO LINGER THRU TUESDAY...THERE REMAINS ABOVE
NORMAL CONFIDENCE THAT MAXIMUM TEMPERATURES WILL CONTINUE TO AVERAGE
BELOW CLIMO. IT REMAINS TO BE SEEN ON JUST HOW MUCH FORCING IS
AVAILABLE TO TRIGGER SHOWER ACTIVITY...SO JUST A TOKEN SLIGHT AND/OR
SMALL POP WILL REMAIN.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
AT KCLT AND ELSEWHERE...CONVECTION AT THIS MOMENT IS PRIMARILY
LIMITED TO A SMALL/PERSISTENT CLUSTER OF STRONG TO SEVERE CONVECTION
OVER THE SOUTHERN NC FOOTHILLS. THIS WILL NOT THREATEN ANY OF THE
TAF SITES IN THE NEAR TERM. HOWEVER...THERE ARE SIGNS THAT SCATTERED
CONVECTION MAY BE IN THE PROCESS OF /FANNING OUT/ ALONG THE OUTFLOW
BOUNDARY LAID DOWN BY THIS CONVECTION. THEREFORE...TEMPOS FOR TSRA
WILL BE CONTINUED AT KCLT...AND INTRODUCED AT KGSP THROUGH THE
AFTERNOON. THE TEMPO HAS BEEN SCALED BACK TO SHRA AT KHKY AND
COMPLETELY REMOVED AT KAVL...SINCE THE OUTFLOW HAS NOW ESSENTIALLY
PASSED THEM. HOWEVER...ADDITIONAL DEVELOPMENT WILL BE POSSIBLE NEAR
THESE SITES AND ALL OTHER TAF SITES THIS AFTERNOON. CONVECTION MAY
ALSO ORGANIZE ACROSS THE TENN VALLEY THIS AFTERNOON AND PUSH
SOUTHEAST ACROSS THE SOUTHERN APPALACHIANS AND SURROUNDING AREAS
INTO THE EVENING. THEREFORE...A VCTS/VCSH WILL BE CARRIED AT ALL
TERMINALS THROUGH ABOUT 03Z.

EVEN OUR MOST RELIABLE GUIDANCE IS ONCE AGAIN HITTING THE FOG HARD
LATE TONIGHT...AS IT HAS BEEN DOING THE PASTS SEVERAL MORNINGS...
WITH VERY POOR VERIFICATION RESULTS. THEREFORE...WE HAVE IMPROVED
THE VISBY FORECAST CONSIDERABLY OVER WHAT GUIDANCE IS ADVERTISING...
BUT THIS IS STILL RESULTING IN A 3SM FORECAST AT KAVL. OTHERWISE...
VFR CONDITIONS ARE EXPECTED THROUGH THE PERIOD OUTSIDE OF SHRA/
TSRA.

OUTLOOK...SCT AFTERNOON CONVECTION AND PATCHY EARLY MORNING FOG WILL
REMAIN IN THE FORECAST THROUGH THE WEEK. THERE WILL ALSO BE AN
OUTSIDE CHANCE FOR REMNANT ORGANIZED CONVECTION APPROACHING THE
AREA FROM THE NW DURING THE LATE NIGHT/EARLY MORNING HOURS.

CONFIDENCE TABLE...

            18-24Z        00-06Z        06-12Z        12-18Z
KCLT       HIGH 100%     HIGH 100%     HIGH 100%     HIGH 100%
KGSP       HIGH 100%     HIGH 100%     HIGH 100%     HIGH 100%
KAVL       HIGH 100%     HIGH  95%     HIGH  95%     HIGH  95%
KHKY       HIGH 100%     HIGH 100%     HIGH 100%     HIGH 100%
KGMU       HIGH 100%     HIGH 100%     HIGH 100%     HIGH 100%
KAND       HIGH 100%     HIGH 100%     HIGH  95%     HIGH  91%

THE PERCENTAGE REFLECTS THE NUMBER OF GUIDANCE MEMBERS AGREEING
WITH THE SCHEDULED TAF ISSUANCE FLIGHT RULE CATEGORY. COMPLETE
HOURLY EXPERIMENTAL AVIATION FORECAST CONSISTENCY TABLES AND ENSEMBLE
FORECASTS ARE AVAILABLE AT THE FOLLOWING LINK: (MUST BE LOWER CASE)

WWW.WEATHER.GOV/GSP/AVIATION_TABLES

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
NC...NONE.
SC...NONE.

&&

SYNOPSIS...ARK
NEAR TERM...JAT/JDL
SHORT TERM...ARK
LONG TERM...ARK
AVIATION...JDL
Hazardous weather outlook, Aug 20, 4:18 AM EST, 9 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
518 AM EDT WED AUG 20 2014

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-210930-
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-
518 AM EDT WED AUG 20 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST GEORGIA...PIEDMONT
NORTH CAROLINA...WESTERN NORTH CAROLINA AND UPSTATE SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS
THE REGION THIS AFTERNOON INTO THIS EVENING...WITH HIGHEST
CHANCES IN THE MOUNTAINS. THE PRIMARY THREATS WILL BE CLOUD-TO-
GROUND LIGHTNING AND LOCALLY HEAVY RAINFALL. HOWEVER...A FEW STORMS MAY
BE STRONG ENOUGH TO PRODUCE LARGE HAIL AND DAMAGING WIND GUSTS.

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

..THURSDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..FRIDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..SATURDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..SUNDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..MONDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
..TUESDAY...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

NONE.

ARK

In the hours before

Special weather statement, Aug 20, 12:30 PM EST, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
130 PM EDT WED AUG 20 2014

NCZ506>508-201800-
EASTERN MCDOWELL-GREATER RUTHERFORD-RUTHERFORD MOUNTAINS-
130 PM EDT WED AUG 20 2014

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL RUTHERFORD AND SOUTH
CENTRAL MCDOWELL COUNTIES THROUGH 200 PM EDT...

AT 129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM NEAR THERMAL CITY...OR 9 MILES NORTHWEST OF
RUTHERFORDTON...MOVING SOUTHEAST AT 10 MPH.

THIS STORM WILL IMPACT LOCATIONS NEAR...
  RUTHERFORDTON...

SMALL HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3555 8192 3549 8181 3539 8178 3530 8203
      3540 8213 3542 8219 3552 8219 3553 8217
      3552 8214 3553 8208 3556 8206 3558 8201

CSH
Local storm report, Aug 20, 12:36 PM EST, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
136 PM EDT WED AUG 20 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0105 PM     TSTM WND DMG     2 ESE MARION            35.67N 81.97W
08/20/2014                   MCDOWELL           NC   COUNTY OFFICIAL

            TREES DOWN ALONG TUNNEL ROAD AND JACKTOWN ROAD.

&&

HG
Local storm report, Aug 20, 12:37 PM EST, 1 hour 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
137 PM EDT WED AUG 20 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 PM     HAIL             MARION                  35.68N 82.01W
08/20/2014  E0.88 INCH       MCDOWELL           NC   COUNTY OFFICIAL

            COUNTY RELAYED REPORT OF NICKEL HAIL IN DOWNTOWN MARION.

&&

HG
Local storm report, Aug 20, 12:39 PM EST, 1 hour 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
139 PM EDT WED AUG 20 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1250 PM     HAIL             2 N MARION              35.71N 82.01W
08/20/2014  E0.88 INCH       MCDOWELL           NC   COUNTY OFFICIAL

            NICKEL HAIL IN HANKINS AREA.

&&

HG
Local storm report, Aug 20, 12:44 PM EST, 1 hour 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
144 PM EDT WED AUG 20 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0110 PM     TSTM WND DMG     5 SE MARION             35.64N 81.94W
08/20/2014                   MCDOWELL           NC   BROADCAST MEDIA

            SEVERAL FOUR-INCH DIAMETER LIMBS BLOWN DOWN AT LANDIS
            ROAD AND HIGHWAY 226.

&&

HG
Special weather statement, Aug 20, 1:13 PM EST, 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
213 PM EDT WED AUG 20 2014

NCZ508-510-201845-
EASTERN POLK-GREATER RUTHERFORD-
213 PM EDT WED AUG 20 2014

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN RUTHERFORD AND EASTERN
POLK COUNTIES THROUGH 245 PM EDT...

AT 211 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTHWEST OF RUTHERFORDTON...MOVING
SOUTHEAST AT 15 MPH.

SMALL HAIL...AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

FREQUENT LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...TRY TO
GET INDOORS OR INTO A HARD TOPPED VEHICLE. OTHERWISE...STAY AWAY FROM
OPEN AREAS AND ISOLATED HIGH OBJECTS SUCH AS TREES. WHEN INDOORS...
STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING WIRED ELECTRONIC
DEVICES. TRY TO UNPLUG UNNECESSARY APPLIANCES BEFORE THE STORM
APPROACHES.

LAT...LON 3541 8185 3523 8175 3522 8176 3519 8215
      3537 8217

CSH

The radar

The Greer radar (KGSP), 38 km away, was scanning. The volume nearest the first event began at 18:53 UTC.

Open the radar archive at this moment

Event by event

3 hail, 2 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Spartanburg

When
August 20, 1:55 PM EST
Where
Spartanburg County, 2.19 mi NW of Mayo
Measured
50 kt (58 mph) estimated gust
Reported by
911 Call Center
Coordinates
35.100, -81.900

County comms reported two trees blown down near Buck Creek Rd and Crow Rd.

Hail, Pickens

When
August 20, 4:30 PM EST to 4:40 PM EST
Where
Pickens County, 0.69 mi S of Crow Creek to 0.69 mi N of Pickens
Measured
1 in hail
Reported by
Fire Department/Rescue
Coordinates
34.910, -82.750

FD reported quarter size hail 3 NW Pickens. Ham radio operator reported quarter size hail off Jewell St in downtown Pickens.

Hail, Pickens

When
August 20, 5:08 PM EST
Where
Pickens County, 1.49 mi SSW of Pickens Co Arpt
Measured
1 in hail
Reported by
Public
Coordinates
34.800, -82.710

Public reported quarter size hail.

Hail, Pickens

When
August 20, 5:13 PM EST
Where
Pickens County, 1.14 mi W of Central
Measured
1 in hail
Reported by
Public
Coordinates
34.720, -82.800

Public reported quarter size hail.

Thunderstorm Wind, Pickens

When
August 20, 5:34 PM EST
Where
Pickens County, 1.84 mi ESE of Clemson
Measured
40 kt (46 mph) estimated gust
Property damage
$100,000
Reported by
Emergency Manager
Coordinates
34.670, -82.800

EM reported a tree was blown down on a house, causing significant structural damage.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in South Carolina in 2014Every state in 2014This day in weather historyWarnings in South Carolina, August 2014

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 533894, 533898, 533896, 533897, 533895.