Alert archive / South Carolina / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 204, NWS Charleston, SC

October 25, 20104 counties in South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Oct 25, 2010, 4:07 PM EDT for 4 counties in South Carolina. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 25, 2010, 4:07 PM EDT (20:07 UTC)
Expired
Oct 25, 2010, 5:00 PM EDT
In force
53 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon

Counties Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 83 km from the middle of the area, began a volume at 20:11 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 25, 11:36 AM EDTSevere Thunderstorm WatchSPC8 hr
Oct 25, 3:06 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.1 hours before the alert went out and 23 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, Charleston AFB, SC at 12:00Z on 2010-10-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1764 joules per kilogram.LCLEL10008507005003002001001 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, Charleston AFB, SC at 12:00Z on 2010-10-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 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
1764 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
126 m²/s²
Significant tornado parameter
1.0
Supercell composite
6.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Oct 25, 3:09 PM EDT, 58 minutes earlier.

Area forecast discussion, Oct 25, 3:09 PM EDT, 58 minutes before
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Hazardous weather outlook, Oct 25, 3:46 PM EDT, 21 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE CHARLESTON SC
346 PM EDT MON OCT 25 2010

GAZ087-088-099>101-SCZ040-042>044-047>049-051-261045-
JENKINS-SCREVEN-CANDLER-BULLOCH-EFFINGHAM-ALLENDALE-HAMPTON-
INLAND COLLETON-DORCHESTER-INLAND JASPER-BEAUFORT-COASTAL COLLETON-
COASTAL JASPER-
346 PM EDT MON OCT 25 2010

...TORNADO WATCH 718 IN EFFECT UNTIL 8 PM EDT THIS EVENING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   TORNADO WATCH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS SHOULD ACTIVATE
AT THIS TIME.

AMZ330-350-352-354-GAZ114>119-137>141-SCZ045-050-052-261045-
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-TATTNALL-EVANS-INLAND BRYAN-
COASTAL BRYAN-INLAND CHATHAM-COASTAL CHATHAM-LONG-INLAND LIBERTY-
COASTAL LIBERTY-INLAND MCINTOSH-COASTAL MCINTOSH-INLAND BERKELEY-
CHARLESTON-TIDAL BERKELEY-
346 PM EDT MON OCT 25 2010

...SEVERE THUNDERSTORM WATCH 715 IN EFFECT UNTIL 7 PM EDT THIS
EVENING...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS SHOULD ACTIVATE
AT THIS TIME.

AMZ374-261045-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-
346 PM EDT MON OCT 25 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Oct 25, 2:50 PM EDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
250 PM EDT MON OCT 25 2010

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

0230 PM     HAIL             3 SE ULMER              33.07N 81.17W
10/25/2010  E1.75 INCH       ALLENDALE          SC   PUBLIC

&&

MTE
Local storm report, Oct 25, 3:03 PM EDT, 1 hour 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
303 PM EDT MON OCT 25 2010

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

0256 PM     HAIL             SW LODGE                33.06N 80.96W
10/25/2010  E1.75 INCH       COLLETON           SC   PUBLIC

            THE PUBLIC REPORTED GULF BALL SIZE HAIL IN DOWNTOWN LODGE
            SOUTH CAROLINA.

&&

DPB
Local storm report, Oct 25, 3:07 PM EDT, 1 hour before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHARLESTON SC
307 PM EDT MON OCT 25 2010

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

0256 PM     HAIL             SW LODGE                33.06N 80.96W
10/25/2010  E1.75 INCH       COLLETON           SC   PUBLIC

            THE PUBLIC REPORTED GOLF BALL SIZE HAIL IN DOWNTOWN LODGE
            SOUTH CAROLINA.

&&

DPB
Special weather statement, Oct 25, 3:13 PM EDT, 54 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
313 PM EDT MON OCT 25 2010

SCZ043-251945-
INLAND COLLETON-
313 PM EDT MON OCT 25 2010

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF COLLETON COUNTY
THROUGH 345 PM EDT...

AT 309 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM WALTERBORO TO
SALKEHATCHIE...MOVING NORTHEAST AT 30 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
COTTAGEVILLE...HENDERSONVILLE...RITTER...ROUND O AND WALTERBORO...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH IS ALSO IN EFFECT. THUNDERSTORMS CAN PRODUCE
TORNADOES SUDDENLY...SOMETIMES WITH LITTLE OR NO WARNING. BE ALERT
FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE READY TO ACT QUICKLY
IF SEVERE WEATHER IS OBSERVED OR A WARNING IS ISSUED.

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.

&&

LAT...LON 3305 8043 3293 8041 3280 8050 3270 8082
      3278 8087 3293 8086 3304 8059 3306 8046
TIME...MOT...LOC 1913Z 231DEG 26KT 3294 8061 3273 8082
Special weather statement, Oct 25, 3:18 PM EDT, 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
318 PM EDT MON OCT 25 2010

SCZ043-044-251945-
DORCHESTER-INLAND COLLETON-
318 PM EDT MON OCT 25 2010

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF DORCHESTER AND
COLLETON COUNTIES THROUGH 345 PM EDT...

AT 314 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM REEVESVILLE TO 7
MILES SOUTHWEST OF CAT HOLE...MOVING NORTHEAST AT 45 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
HARLEYVILLE...INDIAN FIELD...REEVESVILLE AND SAINT GEORGE...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
NICKEL SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH IS ALSO IN EFFECT. THUNDERSTORMS CAN PRODUCE
TORNADOES SUDDENLY...SOMETIMES WITH LITTLE OR NO WARNING. BE ALERT
FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE READY TO ACT QUICKLY
IF SEVERE WEATHER IS OBSERVED OR A WARNING IS ISSUED.

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.

&&

LAT...LON 3330 8047 3327 8043 3327 8037 3326 8035
      3322 8033 3320 8031 3318 8030 3305 8073
      3317 8081 3331 8055 3334 8049
TIME...MOT...LOC 1919Z 246DEG 38KT 3323 8064 3313 8074
Special weather statement, Oct 25, 3:50 PM EDT, 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
350 PM EDT MON OCT 25 2010

SCZ043>045-050-052-252030-
CHARLESTON-DORCHESTER-INLAND BERKELEY-INLAND COLLETON-TIDAL BERKELEY-
350 PM EDT MON OCT 25 2010

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY...
DORCHESTER...COLLETON AND CHARLESTON COUNTIES THROUGH 430 PM EDT...
...MARINERS ON LAKE MOULTRIE SHOULD SEEK SAFE HARBOR...

AT 342 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM EBENEZER TO
NEYLES...MOVING NORTHEAST AT 40 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
HARLEYVILLE...CANADYS...NEYLES...COTTAGEVILLE...RIDGEVILLE...
SUMMERVILLE...NORTH CHARLESTON...CHARLESTON AIRPORT...LAKE
MOULTRIE...BONNEAU...MONCKS CORNER...GOOSE CREEK...
INTERSTATE 26 BETWEEN NORTH CHARLESTON AND INTERSTATE 95...
INTERSECTION OF INTERSTATE 26 AND 526...
MUCH OF ROUTES 78...52 AND 17 ALTERNATE...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
NICKEL SIZE HAIL...
FREQUENT CLOUD TO GROUND LIGHTNING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THESE STORMS ARE EXPECTED TO IMPACT LAKE MOULTRIE. BOATERS SHOULD
SEEK SAFE HARBOR IMMEDIATELY. IF CAUGHT ON THE OPEN WATERS...STAY AS
LOW AS POSSIBLE AND WEAR A PERSONAL FLOATATION DEVICE. SWIMMERS
SHOULD GET OUT OF THE WATER AND INTO A STURDY BUILDING. REMEMBER...IF
YOU CAN HEAR THUNDER YOU ARE AT RISK OF BEING STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CHARLESTON AND BERKELEY
COUNTIES. THUNDERSTORMS CAN PRODUCE LARGE HAIL...DAMAGING WINDS...
AND ISOLATED TORNADOES SUDDENLY...SOMETIMES WITH LITTLE OR NO
WARNING. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND BE
READY TO ACT QUICKLY IF SEVERE WEATHER IS OBSERVED OR A WARNING IS
ISSUED.

A TORNADO WATCH IS IN EFFECT FOR DORCHESTER AND COLLETON COUNTIES.
THUNDERSTORMS CAN PRODUCE TORNADOES SUDDENLY...SOMETIMES WITH LITTLE
OR NO WARNING. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AND
BE READY TO ACT QUICKLY IF SEVERE WEATHER IS OBSERVED OR A WARNING
IS ISSUED.

&&

LAT...LON 3286 7995 3274 8071 3329 8059 3334 8050
      3327 8043 3327 8036 3328 8033 3327 8030
      3330 8025 3338 8024 3340 8022 3345 8022
      3346 8015 3350 8014 3352 8007 3351 7996
      3337 7977
TIME...MOT...LOC 1947Z 246DEG 36KT 3332 8032 3284 8050

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 25, 9:31 AM EDTSmall Craft AdvisoryCHS54 hr
Oct 25, 12:37 PM EDTSpecial Weather StatementCHSJenkins53 min
Oct 25, 1:45 PM EDTSevere Thunderstorm WarningCHSScreven60 min
Oct 25, 2:02 PM EDTTornado WarningCHSScreven43 min
Oct 25, 2:46 PM EDTSevere Thunderstorm WarningCHSJenkins, Screven32 min
Oct 25, 4:22 PM EDTSevere Thunderstorm WarningCHSBulloch, Candler, Jenkins, Screven53 min
Oct 25, 4:36 PM EDTTornado WarningCHSBulloch, Candler39 min
Oct 25, 5:10 PM EDTSevere Thunderstorm WarningCHSBulloch, Candler65 min
Oct 25, 5:40 PM EDTSpecial Weather StatementCHSLiberty35 min
Oct 25, 5:57 PM EDTSevere Thunderstorm WarningCHSEffingham, Screven63 min
Oct 25, 6:13 PM EDTSpecial Weather StatementCHSChatham, Liberty, McIntosh32 min
Oct 25, 6:24 PM EDTSevere Thunderstorm WarningCHSBryan, Liberty48 min
Oct 25, 6:32 PM EDTSpecial Weather StatementCHSChatham28 min
Oct 25, 6:46 PM EDTSpecial Marine WarningCHS119 min
Oct 25, 7:20 PM EDTSpecial Marine WarningCHS115 min
Oct 25, 7:35 PM EDTSevere Thunderstorm WarningCHSEffingham55 min
Oct 25, 1:28 PM EDTSpecial Weather StatementCHSAllendale62 min
Oct 25, 2:44 PM EDTSevere Thunderstorm WarningCHSColleton, Hampton46 min
Oct 25, 3:13 PM EDTSpecial Weather StatementCHSColleton32 min
Oct 25, 3:18 PM EDTSpecial Weather StatementCHSDorchester27 min
Oct 25, 3:50 PM EDTSpecial Weather StatementCHSBerkeley, Colleton, Dorchester40 min
Oct 25, 5:11 PM EDTSpecial Weather StatementCHSColleton34 min
Oct 25, 5:29 PM EDTSevere Thunderstorm WarningCHSCharleston, Colleton, Dorchester61 min
Oct 25, 5:43 PM EDTSpecial Weather StatementCHSAllendale32 min
Oct 25, 6:00 PM EDTSpecial Weather StatementCHSColleton30 min
Oct 25, 6:28 PM EDTSpecial Weather StatementCHSColleton, Dorchester, Hampton32 min
Oct 25, 7:03 PM EDTSpecial Weather StatementCHSCharleston, Colleton, Dorchester57 min
Oct 25, 7:06 PM EDTSpecial Weather StatementCHSBerkeley24 min
Oct 25, 7:22 PM EDTSpecial Weather StatementCHSBeaufort, Jasper38 min
Oct 25, 7:34 PM EDTSevere Thunderstorm WarningCHSBerkeley, Charleston, Colleton, Dorchester56 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2010Every severe thunderstorm warning in 2010

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.