Alert archive / South Carolina / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 117, NWS Charleston, SC

September 2, 2013Beaufort County, Jasper County, South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Sep 2, 2013, 7:29 PM EDT for Beaufort County, Jasper County, South Carolina. It was in force for 31 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: Sep 2, 2013, 7:29 PM EDT (23:29 UTC)
Expired: Sep 2, 2013, 8:00 PM EDT
In force: 31 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon

Counties Beaufort County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 34 km from the middle of the area, began a volume at 23:32 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, 11.5 hours before the alert went out and 357 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1494 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 523 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -106 m²/s²
0-3 km storm-relative helicity: -101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Sep 2, 6:03 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Sep 2, 6:03 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, Sep 2, 3:54 AM EDT, 15 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
354 AM EDT MON SEP 2 2013

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>052-031030-
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-INLAND BERKELEY-
INLAND JASPER-BEAUFORT-COASTAL COLLETON-CHARLESTON-COASTAL JASPER-
TIDAL BERKELEY-
354 AM EDT MON SEP 2 2013

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

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ASSISTANCE IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, Sep 2, 5:31 PM EDT, 1 hour 58 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
531 PM EDT MON SEP 2 2013

GAZ088-100-101-SCZ042-047-022215-
BULLOCH-EFFINGHAM-HAMPTON-INLAND JASPER-SCREVEN-
531 PM EDT MON SEP 2 2013

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SCREVEN...BULLOCH...
EFFINGHAM...HAMPTON AND JASPER COUNTIES THROUGH 615 PM EDT...

AT 530 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...ALONG A LINE EXTENDING FROM GOLOID TO
OVERBROOK...MOVING EAST AT 25 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
GEORGIA SOUTHERN...KENNEDY POND...FARMDALE...MILL CREEK REGIONAL
PARK...GREEN HILL...PLANTATION AIRPARK...WHITE HILL...NEVILS...
GWINETTS CROSSING...SHEPPARDS...

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3272 8183 3271 8120 3222 8143 3223 8143
      3224 8144 3218 8165 3222 8181 3224 8182
      3224 8184 3227 8189 3227 8196
TIME...MOT...LOC 2131Z 277DEG 20KT 3267 8166 3226 8185

Special weather statement, Sep 2, 5:45 PM EDT, 1 hour 44 minutes before

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Special weather statement, Sep 2, 6:18 PM EDT, 1 hour 11 minutes before

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Special weather statement, Sep 2, 6:29 PM EDT, 1 hour before

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Special weather statement, Sep 2, 7:01 PM EDT, 28 minutes before

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Special weather statement, Sep 2, 7:05 PM EDT, 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 3:30 PM EDT	Special Weather Statement	CHS	Charleston	30 min
Sep 2, 4:00 PM EDT	Areal Flood Advisory	CHS	Charleston	60 min
Sep 2, 5:45 PM EDT	Special Weather Statement	CHS	Colleton	30 min
Sep 2, 5:49 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Dorchester	41 min
Sep 2, 6:18 PM EDT	Special Weather Statement	CHS	Dorchester	12 min
Sep 2, 6:29 PM EDT	Special Weather Statement	CHS	Dorchester	46 min
Sep 2, 7:01 PM EDT	Special Weather Statement	CHS	Berkeley	29 min
Sep 2, 7:05 PM EDT	Special Weather Statement	CHS	Beaufort	25 min
Sep 2, 7:40 PM EDT	Special Marine Warning	CHS		65 min
Sep 2, 3:52 PM EDT	Special Weather Statement	CHS	Jenkins	38 min
Sep 2, 4:04 PM EDT	Severe Thunderstorm Warning	CHS	Jenkins, Screven	41 min
Sep 2, 4:51 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Candler, Jenkins, Screven	39 min
Sep 2, 5:31 PM EDT	Special Weather Statement	CHS	Bulloch	44 min
Sep 2, 7:53 PM EDT	Special Weather Statement	CHS	Chatham	37 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2013 Every severe thunderstorm warning in 2013

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.