South Carolina, 2008

Flash Flood and Hail in South Carolina, June 20 to 21, 2008

June 20 to 21, 2008 · NWS CHS · 28 events in 5 counties and zones

A weak area of low pressure in combination with the sea breeze in a highly unstable environment, resulted in scattered severe thunderstorms across southern South Carolina.

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
$5,000
Crop damage
None recorded
Events
28

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 CHS wrote it up.

A weak area of low pressure in combination with the sea breeze in a highly unstable environment, resulted in scattered severe thunderstorms across southern South Carolina.

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 Charleston, SC wrote its last area forecast discussion before the first event at Jun 20, 9:50 AM EST, 1 hour earlier.

Area forecast discussion, Jun 20, 9:50 AM EST, 1 hour before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
1050 AM EDT FRI JUN 20 2008

.SYNOPSIS...
WEAK LOW PRES WILL MEANDER OVER THE SE U.S. THROUGH THIS WEEKEND.
A SERIES OF WEAKENING COLD FRONTS WILL MOVE THROUGH THE AREA
SUNDAY THROUGH MONDAY. HIGH PRESSURE WILL THEN BUILD OVER THE AREA
DURING THE MIDDLE OF NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
THE 14Z SURFACE MAP SHOWS A WEAK AREA OF LOW PRESSURE ACROSS SE GA
WITH A TROUGH EXTENDING NWD ACROSS SE SC. ISOLATED THUNDERSTORMS
HAD ALREADY DEVELOPED ACROSS THE AREA THIS MORNING...A PRECURSOR TO
ANOTHER ACTIVE DAY.

SCENARIO TODAY APPEARS SIMILAR TO THAT OF THURSDAY...WITH AN
UPPER TROUGH PERSISTING OVER THE REGION...ACCOMPANIED BY AN INLAND
SURFACE TROUGH AND A PROGRESSIVE AFTERNOON/EVENING SEA BREEZE
BOUNDARY. BY EARLY AFTERNOON... SCATTERED THUNDERSTORMS WILL
AGAIN FIRE ALONG THE SEA BREEZE... WHICH WILL ADVANCE INLAND
WITHIN AN ENVIRONMENT FEATURING SBCAPES 1500-2500 J/KG AND LIFTED
INDICES -4 TO -6. GIVEN EXPECTED WET BULB ZERO HEIGHTS 9.5-10.5
KFT...-10C TO -30C CAPES 400-800 J/KG AND DOWNBURST CAPES AS HIGH
AS 1500 J/KG...ANY PULSE THUNDERSTORMS MAY PRODUCE LARGE HAIL AND
DAMAGING MICROBURSTS. HOWEVER...AS WAS THE CASE THURSDAY...THUNDERSTORMS
DEVELOPING ALONG THE SEA BREEZE WILL PUSH BACK TOWARD THE COAST
DUE TO THE W/NW STEERING FLOW ALOFT. THE RESULTING ENHANCED LOW
LEVEL STORM INFLOW/ HELICITY...ACCOMPANIED BY 0-6 KM BULK SHEAR
30-40 KNOTS...MAY SUPPORT ISOLATED SUPERCELLS WITH VERY LARGE
HAIL...MORE PERSISTENT DAMAGING MICROBURSTS AND EVEN A BRIEF
TORNADO.

A COUPLE OF PARAMETERS DIFFER FROM THURSDAY AND MAY RESULT IN FEWER
SEVERE THUNDERSTORMS. SPECIFICALLY...THE LATEST MODEL GUIDANCE
SUGGESTS THAT 500 MB TEMPS WILL WARM A DEGREE OR TWO THIS
AFTERNOON... POSSIBLY RESULTING IN SLIGHTLY LOWER MID-LEVEL LAPSE
RATES. ALSO...THE SIGNIFICANT DEWPOINT BOUNDARY WHICH SEPARATED
DEWPOINTS IN THE 40S/50S WEST TO THE 60S/70S EAST MAY BE LOCATED
SLIGHTLY FARTHER INLAND THIS AFTERNOON...LEAVING ONLY THE SEA
BREEZE AND CONVECTIVE OUTFLOW TO INITIATE CONVECTION.

WILL CONTINUE MENTION OF THE POTENTIAL FOR ISOLATED SEVERE
THUNDERSTORMS WITHIN THE HAZARDOUS WEATHER OUTLOOK /HWO/.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM SATURDAY/...
STRONGEST CONVECTION SHOULD DIMINISH WITH DIURNAL STABILIZATION THIS
EVENING. HOWEVER...0Z GUIDANCE HINTS AT LINGERING INSTABILITY...
ISENTROPIC ASCENT AND LOW LEVEL CONVERGENCE/MOISTURE ADVECTION.
THUS...MAINTAINED SLIGHT CHANCE POPS OVERNIGHT.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
AS ONE DEEP LONGWAVE TROF MOVES OFFSHORE SAT MRNG...ANOTHER LONGWAVE
TROF WILL DEEPEN OVER THE GREAT LAKES WITH ITS AXIS SWINGING
THROUGH THE MID AND LOWER MISS RIVER VALLEYS. UNDER THE TROF NEAR
THE SFC...A DIFFUSE FRONTAL BOUNDARY NEARLY PARALLEL TO THE FL
PANHANDLE WILL DEVELOP AN AREA OF LOW PRESSURE ALONG IT OVER S GA
SAT AND SHIFT NEWD THROUGH SUN. THIS WILL THEN BRING THE FNTL BNDRY
N...SO CONVERGENCE AT THE SFC WILL INCREASE WITHIN THE DEEP MOISTURE
PROGGED TO BE IN PLACE. WHILE THE DEEP UPPER TROF WILL STILL REMAIN
W OF THE CWFA SAT...PLENTY OF SHORTWAVES WILL PUSH THROUGH THAT WILL
HELP TRIGGER SHWR/TSTM ACTIVITY WITH THE SFC FRONTAL BOUNDARY AND
THE EXPECTED DIURNAL SEABREEZE. AM NOT QUITE CONFIDENT TO GO WITH
LIKELY POPS DUE TO HIGH UNCERTAINTY WITH PRECIP COVERAGE...BUT WILL
MAINTAIN HIGH/MID CHC POPS FOR SAT. WITH THE MAIN TROF APPROACHING
AND NUMEROUS SURFACE BOUNDARIES REMAINING IN PLACE THROUGH SUN...
WILL KEEP THE MID/HIGH CHC POPS GOING THROUGH SUN. ALONG WITH THE
COVERAGE QUESTIONS...THERE IS THE QUESTION OF STORM STRENGTH AND
POTENTIAL FOR SEVERE WX. WITH THE NUMEROUS BOUNDARIES IN PLACE...THE
UPPER SHORTWAVES COMING THROUGH AND DEEP MOISTURE IN PLACE...THE
INGREDIENTS ARE THERE TO AT LEAST HAVE ISOLD SEVERE TSTMS. LOW TO
MID LEVEL LAPSE RATES LOOK TO REMAIN STEEP AND LOW LEVEL JETTING
AHEAD OF THE DEEP TROUGH MAY BE NEAR ENOUGH TO ALSO BE A PLAYER. SPC
SWODY2 CURRENTLY HAS THE AREA UNDER A SEE TEXT...BUT IS RESERVING
THE RIGHT TO UPGRADE LATER. WILL CONTINUE TO HIGHLIGHT THE POTENTIAL
FOR SEVERE WX IN THE HWO.

ONCE THIS STRONG TROF AXIS PUSHES OFFSHORE SUN NIGHT...ANOTHER DEEP
LONGWAVE TROF AXIS WILL PUSH THROUGH THE SOUTHEAST STATES MON INTO
MON NIGHT...KEEPING AT LEAST SLGT CHC POPS GOING FOR MON INTO MON
NIGHT. THERE ARE SIGNALS OF VARYING STRENGTH OF THIS LAST TROUGH
AMONG THE LONGER RANGE MODELS...SO AM HESITANT TO RAISE POPS ATTM.

ONCE THIS TROUGH MOVES OFFSHORE...THEN SFC HIGH PRESSURE WITH WEAK
UPPER LEVEL RIDGING WILL MOVE OVER THE AREA MAKING THE ONLY FEATURE
FOR THE PROMOTION OF SHWRS/TSTMS THROUGH MIDWEEK THE DIURNAL
SEABREEZE. THUS...HAVE TUNED POPS AS SUCH BY FOCUSING POPS MAINLY
DURING THE AFTN AND EVE HOURS EACH DAY.

TEMPS WILL GENERALLY RUN WITHIN A FEW DEGREES OF NORMAL EACH DAY
THROUGH THIS WEEKEND INTO THE FIRST HALF OF NEXT WEEK.

&&

.AVIATION /14Z FRIDAY THROUGH TUESDAY/...
CANNOT RULE OUT A SHOWER/THUNDERSTORM IN THE VICINITY OF EITHER
TERMINAL THIS MORNING...DUE TO A WEAK SURFACE TROUGH AND AN
UNSTABLE AIRMASS. HOWEVER...MOST CONVECTION WILL OCCUR THIS
AFTERNOON/EARLY EVENING...AS THE SCENARIO APPEARS SIMILAR TO THAT
OF THURSDAY AFTERNOON/EVENING. THUNDERSTORMS WILL INITIATE ALONG
THE SEA BREEZE AND WILL MOVE TOWARD THE E/SE. 12Z TAFS CONTINUE TO
INDICATE VCTS AT BOTH SITES DURING THE 16-23Z TIME FRAME. EITHER
SITE COULD BE DIRECTLY IMPACTED BY THUNDERSTORMS...THUS EXPECT
AMENDMENTS TODAY AS DICTATED BY NEAR TERM CONVECTIVE TRENDS.
THEN...THE 12Z FORECAST INDICATES A TYPICAL DIURNAL DISSIPATION OF
THUNDERSTORMS THIS EVENING. HOWEVER...00Z-06Z GUIDANCE HINTS AT
CONVECTION PERSISTING INTO THE NIGHT...AND LATER FORECAST
ADJUSTMENTS MAY BE REQUIRED.

EXTENDED AVIATION OUTLOOK...OCCASIONAL MVFR OR LOWER CONDITIONS
MAY DEVELOP IN SHOWERS/THUNDERSTORMS SAT THROUGH SUN. MAINLY VFR
CONDITIONS ARE EXPECTED EARLY NEXT WEEK.

&&

.MARINE...
S/SE WINDS MAY DIMINISH SOMEWHAT FOR A TIME THIS MORNING.
THEN...SEA BREEZE ENHANCEMENT WILL INCREASE WINDS TO AROUND 15 KNOTS
THIS AFTERNOON. A DIURNAL SURGE MAY PUSH S WINDS INTO THE 15-20 KT
RANGE TONIGHT. SEAS WILL AVERAGE 2-3 FT THROUGH TONIGHT...ALTHOUGH
MAY REACH 4 FT BEYOND 20 NM OUT OVERNIGHT.

A SERIES OF WEAK LOW PRESSURE SYSTEMS AND ASSOCIATED COLD FRONTS
WILL PUSH THROUGH THE WATERS OVER THE WEEKEND THROUGH THE START OF
NEXT WEEK. NONE LOOK IMPRESSIVE ENOUGH ATTM TO BRING WINDS AND/OR
WAVES TO SCA LEVELS...BUT THERE WILL BE ENOUGH OF A SURGE LATE SAT
THROUGH SAT EVE AS A LOW PRES CENTER MOVES NE AND BRINGS A FRONT
INTO THE WATERS THAT WIND SPEEDS OVER THE OUTER GA WATERS MAY OCNLY
REACH 20 KT. HOWEVER...THE PREVAILING SPEEDS WILL BE BELOW THAT
LEVEL SO WILL CAP SPEEDS AT 15-20KT. THERE ALSO DOES NOT APPEAR TO
BE ANY PROLONGED ONSHORE FETCHES TO ALLOW SEAS TO BUILD TO ANY GREAT
DEGREE SO WILL CAP SEAS AT 5 FT.

THIS SERIES OF DISTURBANCES WILL EVENTUALLY PUSH COMPLETELY AWAY
FROM THE WATERS BY LATE MON NIGHT INTO TUE MORNING...ALLOWING HIGH
PRES TO MOVE INTO THE WATERS. BOTH WINDS AND WAVES WILL GRADUALLY
SUBSIDE BY THE MIDDLE OF NEXT WEEK IN RESPONSE TO THIS CHANGE.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...NONE.
SC...NONE.
MARINE...NONE.

&&
Hazardous weather outlook, Jun 20, 3:22 AM EST, 7 hours 28 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
422 AM EDT FRI JUN 20 2008

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>051-211000-
CHARLESTON HARBOR-
WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM-
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM...INCLUDING
GRAYS REEF NATIONAL MARINE SANCTUARY-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-TATTNALL-EVANS-
INLAND BRYAN-COASTAL BRYAN-INLAND CHATHAM-COASTAL CHATHAM-LONG-
INLAND LIBERTY-COASTAL LIBERTY-INLAND MCINTOSH-COASTAL MCINTOSH-
ALLENDALE-HAMPTON-INLAND COLLETON-DORCHESTER-BERKELEY-INLAND JASPER-
BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER-
422 AM EDT FRI JUN 20 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL
WATERS...SOUTHEAST GEORGIA AND SOUTHEAST SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORMS...AS THE SEA BREEZE ADVANCES INLAND...SCATTERED
THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND EARLY THIS EVENING.
AS THESE THUNDERSTORMS MOVE TOWARD THE EAST AND SOUTHEAST...A FEW
MAY BECOME SEVERE WITH DAMAGING WIND GUSTS EXCEEDING 60 MPH AND
LARGE HAIL EXCEEDING ONE INCH IN DIAMETER...ESPECIALLY BETWEEN 2
PM AND 9 PM. ANY THUNDERSTORMS MAY ALSO PRODUCE FREQUENT AND
DANGEROUS CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SEVERE THUNDERSTORMS...A SERIES OF SURFACE AND UPPER LEVEL
DISTURBANCES WILL AFFECT THE SOUTHEASTERN UNITED STATES SATURDAY
THROUGH SUNDAY. THESE DISTURBANCES...IN COMBINATION WITH THE DAILY
AFTERNOON SEA BREEZE AND A CONTINUED UNSTABLE AIRMASS...MAY LEAD TO
A FEW STRONG TO SEVERE THUNDERSTORMS ACROSS SOUTHERN SOUTH CAROLINA
AND SOUTHEAST GEORGIA. THE MAIN HAZARDS FROM THE STRONGEST STORMS
THAT DEVELOP WILL BE GUSTY WINDS...HAIL...FREQUENT CLOUD TO GROUND
LIGHTNING AND HEAVY RAINFALL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, Jun 20, 10:02 AM EST, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1102 AM EDT FRI JUN 20 2008

SCZ043-044-201600-
DORCHESTER-INLAND COLLETON-
1102 AM EDT FRI JUN 20 2008

...STRONG THUNDERSTORMS WILL IMPACT DORCHESTER COUNTY AND COLLETON
COUNTY THROUGH NOON EDT...

AT 1058 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING 1/2 INCH HAIL...AND GUSTY
WINDS OF 35 TO 45 MPH.  THIS STORM WAS LOCATED NEAR SPRINGTOWN...OR
ABOUT 11 MILES SOUTHWEST OF SAINT GEORGE...MOVING NORTH AT 15 MPH.

AREAS IN AND AROUND CANADYS...DORCHESTER...HARLEYVILLE...
REEVESVILLE...RIDGEVILLE...SAINT GEORGE AND SMOAKS WILL BE IMPACTED
THROUGH NOON EDT.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.

PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE
AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER SUCH AS HAIL...DOWNED
TREES...LIMBS AND POWER LINES.

33
Local storm report, Jun 20, 10:05 AM EST, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1105 AM EDT FRI JUN 20 2008

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

1100 AM     HAIL             BENNETTS POINT          32.56N 80.45W
06/20/2008  E0.50 INCH       COLLETON           SC   TRAINED SPOTTER

            PEA TO MARBLE SIZED HAIL.

&&

33
Special weather statement, Jun 20, 10:13 AM EST, 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1113 AM EDT FRI JUN 20 2008

SCZ049-050-201600-
CHARLESTON-COASTAL COLLETON-
1113 AM EDT FRI JUN 20 2008

...STRONG THUNDERSTORMS WILL IMPACT COLLETON COUNTY AND CHARLESTON
COUNTY THROUGH NOON EDT...

AT 1108 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING 1/2 INCH HAIL...AND GUSTY
WINDS OF 35 TO 45 MPH.  THIS STORM WAS LOCATED NEAR BENNETTS POINT...
OR ABOUT 7 MILES NORTHWEST OF EDISTO BEACH...MOVING EAST AT 13 MPH.

AREAS IN AND AROUND EDISTO ISLAND AND EDISTO BEACH WILL BE IMPACTED
THROUGH NOON EDT.

FREQUENT LIGHTNING IS OCCURRING WITH THIS THUNDERSTORM. IF
OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS. IF INDOORS...STAY
AWAY FROM WINDOWS AND DOORS. AVOID USING TELEPHONES UNLESS IT IS AN
EMERGENCY.

PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE
AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER SUCH AS HAIL...DOWNED
TREES...LIMBS AND POWER LINES.

33
Local storm report, Jun 20, 10:24 AM EST, 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1124 AM EDT FRI JUN 20 2008

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

0221 PM     TSTM WND DMG     8 SE YEMASSEE           32.61N 80.75W
06/19/2008                   BEAUFORT           SC   NWS EMPLOYEE

            NWS EMPLOYEE REPORTED TREE LIMBS DOWN ON RIVER ROAD
            BETWEEN YEMASSEE AND ALT 17.

&&

REB
Special weather statement, Jun 20, 10:38 AM EST, 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
1138 AM EDT FRI JUN 20 2008

SCZ049-050-201615-
CHARLESTON-COASTAL COLLETON-
1138 AM EDT FRI JUN 20 2008

...STRONG THUNDERSTORMS WILL IMPACT COLLETON COUNTY AND CHARLESTON
COUNTY THROUGH 1215 PM EDT...

AT 1136 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING 1/2 INCH HAIL...AND STRONG
WINDS OF 45 TO 55 MPH.  THIS STORM WAS LOCATED NEAR EDISTO BEACH...OR
ABOUT OVER EDISTO BEACH...MOVING EAST AT 10 MPH.

AREAS IN AND AROUND EDISTO ISLAND AND EDISTO BEACH WILL BE IMPACTED
THROUGH 1215 PM EDT.

FREQUENT LIGHTNING IS OCCURRING WITH THIS THUNDERSTORM. IF
OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS. IF INDOORS...STAY
AWAY FROM WINDOWS AND DOORS. AVOID USING TELEPHONES UNLESS IT IS AN
EMERGENCY.

PLEASE CONTACT THE NATIONAL WEATHER SERVICE IN CHARLESTON TOLL FREE
AT 1-888-383-2024 IF YOU OBSERVE SEVERE WEATHER SUCH AS HAIL...DOWNED
TREES...LIMBS AND POWER LINES.

33
Local storm report, Jun 20, 10:44 AM EST, 6 minutes before
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The radar

The Charleston,SC radar (KCLX), 70 km away, was scanning. The volume nearest the first event began at 15:49 UTC.

Open the radar archive at this moment

Event by event

21 hail, 5 thunderstorm wind, 1 lightning, 1 flash flood. Local standard time, as filed.

Hail, Colleton

When
June 20, 10:50 AM EST
Where
Colleton County, 0.9 mi NE of Edisto Beach
Measured
0.88 in hail
Reported by
Park/Forest Service
Coordinates
32.490, -80.320

Nickel size hail and 30 to 40 mph winds were reported by a Park Ranger at the Edisto Beach State Park.

Thunderstorm Wind, Berkeley

When
June 20, 11:57 AM EST
Where
Berkeley County, 0.69 mi S of Eadytown
Measured
43 kt (49 mph) estimated gust
Property damage
$1,000
Reported by
Public
Coordinates
33.410, -80.150

The public reported that the vinyl skirting underneath 3 mobile homes was blown off. Winds were estimated at 40 to 50 mph.

Hail, Berkeley

When
June 20, 12:19 PM EST
Where
Berkeley County, 0.9 mi NE of Harristown
Measured
1.25 in hail
Property damage
$500
Reported by
Public
Coordinates
33.360, -79.870

The public reported quarter to half dollar size hail. The hail was large enough to break a cars windshield.

Hail, Berkeley

When
June 20, 1:15 PM EST
Where
Berkeley County, 0.58 mi E of Moncks Corner
Measured
0.75 in hail
Reported by
Public
Coordinates
33.200, -80.010

The public reported penny size hail in Moncks Corner, South Carolina.

Thunderstorm Wind, Colleton

When
June 20, 1:20 PM EST
Where
Colleton County, Ashton
Measured
50 kt (58 mph) estimated gust
Property damage
$500
Reported by
County Official
Coordinates
33.020, -80.970

A tree was reported down on Cayce Road in Ashton, South Carolina.

Hail, Berkeley

When
June 20, 1:36 PM EST
Where
Berkeley County, 1.8 mi SE of Bonneau
Measured
0.75 in hail
Reported by
Trained Spotter
Coordinates
33.280, -79.930

A trained weather spotter reported penny size hail 2 miles southeast of Bonneau, South Carolina.

Hail, Berkeley

When
June 20, 1:50 PM EST
Where
Berkeley County, 1.38 mi N of Bonneau
Measured
0.75 in hail
Reported by
Public
Coordinates
33.320, -79.950

The public reported penny size hail 3 miles east of Bonneau Beach, South Carolina.

Hail, Berkeley

When
June 20, 2:10 PM EST
Where
Berkeley County, Cordesville Station
Measured
0.75 in hail
Reported by
Trained Spotter
Coordinates
33.130, -79.880

A trained weather spotter reported penny size hail in Cordesville, South Carolina.

Thunderstorm Wind, Colleton

When
June 20, 2:11 PM EST
Where
Colleton County, 0.9 mi NW of Islandton
Measured
50 kt (58 mph) estimated gust
Property damage
$500
Reported by
County Official
Coordinates
32.910, -80.940

An oak tree was reported down on Snyder Highway in Islandton, South Carolina.

Hail, Hampton

When
June 20, 2:22 PM EST
Where
Hampton County, 4.13 mi E of Mc Phersonville
Measured
1 in hail
Reported by
Post Office
Coordinates
32.690, -80.850

Quarter size hail was reported in Yemassee, South Carolina.

Hail, Charleston

When
June 20, 3:10 PM EST
Where
Charleston County, 1.35 mi WSW of Ravenel
Measured
0.88 in hail
Reported by
Trained Spotter
Coordinates
32.760, -80.250

A trained weather spotter reported nickel size hail in Ravenel, South Carolina.

Hail, Beaufort

When
June 20, 3:11 PM EST
Where
Beaufort County, 2.71 mi WSW of Sheldon
Measured
0.75 in hail
Reported by
Public
Coordinates
32.580, -80.820

Penny size hail was reported at the Brays Island Plantation Golf Club, near Sheldon, South Carolina.

Thunderstorm Wind, Beaufort

When
June 20, 3:11 PM EST
Where
Beaufort County, 2.71 mi WSW of Sheldon
Measured
50 kt (58 mph) estimated gust
Property damage
$500
Reported by
Public
Coordinates
32.580, -80.820

The public reported 8 inch diameter tree limbs downed by strong thunderstorm winds at the Brays Island Plantation Golf Club, near Sheldon, South Carolina.

Hail, Charleston

When
June 20, 3:20 PM EST
Where
Charleston County, 0.9 mi SE of Moore Corner
Measured
1 in hail
Reported by
Fire Department/Rescue
Coordinates
33.090, -79.460

The Awendaw Fire Department relayed a report from the McClellanville Fire Department of quarter size hail in McClellanville, South Carolina.

Hail, Charleston

When
June 20, 4:10 PM EST to 4:25 PM EST
Where
Charleston County, 1.38 mi S of Croghan
Measured
1 in hail
Reported by
Public
Coordinates
32.750, -79.970

Dime to quarter size hail occurred for approximately 15 minutes in James Island, South Carolina.

Hail, Charleston

When
June 20, 4:12 PM EST
Where
Charleston County, 2.71 mi SE of Morris Acres
Measured
0.75 in hail
Reported by
Public
Coordinates
32.720, -80.070

The public reported penny size hail on Johns Island, South Carolina.

Hail, Charleston

When
June 20, 4:15 PM EST
Where
Charleston County, 2.71 mi SE of Morris Acres
Measured
1 in hail
Reported by
Public
Coordinates
32.720, -80.070

Quarter size hail was reported on James Island, South Carolina.

Hail, Charleston

When
June 20, 4:20 PM EST
Where
Charleston County, 0.58 mi E of James Is
Measured
1 in hail
Reported by
Public
Coordinates
32.730, -79.920

Nickel to quarter size hail was reported on James Island, South Carolina. A wall cloud was also reported.

Hail, Charleston

When
June 20, 4:25 PM EST
Where
Charleston County, 1.5 mi SSE of Ashley Hall
Measured
1 in hail
Reported by
Public
Coordinates
32.800, -80.010

Nickel to quarter size hail was reported at Parkdale in West Ashley off of US Highway 17.

Hail, Charleston

When
June 20, 4:25 PM EST
Where
Charleston County, 0.9 mi SE of Dupont
Measured
0.75 in hail
Reported by
Trained Spotter
Coordinates
32.790, -80.040

Penny size hail was reported by a trained weather spotter in Oakland, South Carolina.

Lightning, Charleston

When
June 20, 4:25 PM EST
Where
Charleston County, 1.5 mi SSE of Ashley Hall
Property damage
$500
Reported by
Trained Spotter
Coordinates
32.800, -80.010

A trained weather spotter reported that lightning struck and downed a tree in West Ashley, South Carolina.

Hail, Charleston

When
June 20, 4:25 PM EST
Where
Charleston County, 1.5 mi SSE of Ashley Hall
Measured
1.75 in hail
Reported by
Trained Spotter
Coordinates
32.800, -80.010

Quarter to golf ball size hail was reported at the Citadel Mall in West Ashley, South Carolina.

Hail, Charleston

When
June 20, 4:28 PM EST
Where
Charleston County, 2.71 mi SE of Morris Acres
Measured
0.75 in hail
Reported by
Public
Coordinates
32.720, -80.070

Penny size hail was reported on Johns Island, South Carolina.

Hail, Charleston

When
June 20, 4:38 PM EST
Where
Charleston County, James Is
Measured
0.88 in hail
Reported by
Trained Spotter
Coordinates
32.730, -79.930

Nickel size hail was reported by a trained weather spotter in James Island, South Carolina.

Hail, Charleston

When
June 20, 4:45 PM EST
Where
Charleston County, James Is
Measured
0.88 in hail
Reported by
Public
Coordinates
32.730, -79.930

Nickel size hail was reported by the public in James Island, South Carolina.

Flash Flood, Charleston

When
June 20, 5:39 PM EST to 6:00 PM EST
Where
Charleston County, 1.17 mi WNW of Centerville to 1.08 mi WNW of Centerville
Cause
Heavy Rain
Reported by
Law Enforcement
Coordinates
32.735, -79.969

The Charleston county Warning Point reported ongoing flooding on Folly Road near Camp Road in James Island, South Carolina.

Hail, Beaufort

When
June 21, 2:44 AM EST
Where
Beaufort County, 4.02 mi NE of Frogmore
Measured
1.25 in hail
Reported by
Public
Coordinates
32.440, -80.520

Quarter to half dollar size hail was reported by the public 11 miles east-northeast of Port Royal, South Carolina.

Thunderstorm Wind, Beaufort

When
June 21, 2:55 AM EST
Where
Beaufort County, 7.58 mi E of Frogmore
Measured
50 kt (58 mph) estimated gust
Property damage
$1,000
Reported by
Law Enforcement
Coordinates
32.400, -80.440

Trees were reported down and partially blocking the road on the Harbor Island Bridge.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
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.
Lightning
A lightning strike that killed, injured or caused damage.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

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

The same day elsewhere

More

Every storm in South Carolina in 2008Every state in 2008This day in weather historyWarnings in South Carolina, June 2008

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 2026-10-01. Each event’s entry at NCEI: 119325, 119295, 119286, 119275, 119326, 119278, 119279, 119281, 119327, 119328, 119302, 119268, 119271, 119319, 119322, 119304, 119305, 119312, 119307, 119308, 119324, 119329, 119310, 119314, 119315, 119331, 119346, 119347.