Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

August 17, 2012Berkeley County, South Carolina

NWS Charleston, SC issued this special weather statement at Aug 17, 2012, 6:19 PM EDT for Berkeley County, South Carolina. It was in force for 26 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: Aug 17, 2012, 6:19 PM EDT (22:19 UTC)
Expired: Aug 17, 2012, 6:45 PM EDT
In force: 26 min
Issued by: NWS Charleston, SC

County Berkeley County, SC

The radar

The Charleston,SC radar (KCLX), 147 km from the middle of the area, began a volume at 22:19 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

Charleston AFB, SC (KCHS), launched 12:00Z, 10.3 hours before the alert went out and 46 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: 894 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1044 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Charleston, SC wrote its last area forecast discussion before this special weather statement went out at Aug 17, 5:41 PM EDT, 38 minutes earlier.

Area forecast discussion, Aug 17, 5:41 PM EDT, 38 minutes before

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Hazardous weather outlook, Aug 17, 4:57 AM EDT, 13 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
457 AM EDT FRI AUG 17 2012

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>052-181000-
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-
457 AM EDT FRI AUG 17 2012

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

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORMS...SCATTERED SHOWERS AND THUNDERSTORMS ARE
EXPECTED ACROSS MUCH OF THE AREA THIS AFTERNOON INTO THIS EVENING.
A FEW OF THESE THUNDERSTORMS COULD BECOME SEVERE...CAPABLE OF
PRODUCING DAMAGING WINDS...LOCALLY HEAVY RAINFALL AND FREQUENT
LIGHTNING.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

PLEASE RELAY ANY REPORTS OF HAZARDOUS WEATHER INCLUDING...BUT NOT
LIMITED TO LARGE HAIL...DAMAGING WINDS...AND FLOODING TO THE
NATIONAL WEATHER SERVICE IN CHARLESTON AT 1-888-383-2024.

AMZ330-350-352-354-374-181000-
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-
457 AM EDT FRI AUG 17 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ASSISTANCE IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Local storm report, Aug 17, 4:54 PM EDT, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
454 PM EDT FRI AUG 17 2012

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

0424 PM     TSTM WND DMG     3 NW ALLENDALE          33.04N  81.35W
08/17/2012                   ALLENDALE          SC   COUNTY OFFICIAL

            TREE DOWN ONTO ROUTE 125.

&&

EVENT NUMBER CHS1200692

MTE

Local storm report, Aug 17, 4:55 PM EDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
455 PM EDT FRI AUG 17 2012

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

0421 PM     TSTM WND DMG     HENDERSONVILLE          32.79N  80.73W
08/17/2012                   COLLETON           SC   911 CALL CENTER

            TREES DOWN IN HENDERSONVILLE. TIME ESTIMATED BASED ON
            RADAR.

&&

EVENT NUMBER CHS1200693

Local storm report, Aug 17, 4:57 PM EDT, 1 hour 22 minutes before

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Local storm report, Aug 17, 5:29 PM EDT, 50 minutes before

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Special weather statement, Aug 17, 5:50 PM EDT, 29 minutes before

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Special weather statement, Aug 17, 6:19 PM EDT, 0 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
Aug 17, 12:23 PM EDT	Special Weather Statement	CHS	Long, McIntosh	37 min
Aug 17, 12:31 PM EDT	Severe Thunderstorm Warning	CHS	Liberty, McIntosh	59 min
Aug 17, 12:49 PM EDT	Special Marine Warning	CHS		116 min
Aug 17, 12:57 PM EDT	Special Weather Statement	CHS	Liberty, Long	48 min
Aug 17, 12:59 PM EDT	Severe Thunderstorm Warning	CHS	Liberty, Long, McIntosh	61 min
Aug 17, 1:38 PM EDT	Special Weather Statement	CHS	Bryan, Chatham	52 min
Aug 17, 1:46 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Chatham	59 min
Aug 17, 2:24 PM EDT	Special Weather Statement	CHS	Effingham	36 min
Aug 17, 2:27 PM EDT	Severe Thunderstorm Warning	CHS	Chatham	28 min
Aug 17, 2:36 PM EDT	Special Weather Statement	CHS	Bulloch, Evans	24 min
Aug 17, 3:42 PM EDT	Special Weather Statement	CHS	Jenkins, Screven	33 min
Aug 17, 3:51 PM EDT	Special Weather Statement	CHS	Tattnall	24 min
Aug 17, 4:36 PM EDT	Areal Flood Advisory	CHS	Long, Tattnall	54 min
Aug 17, 5:38 PM EDT	Special Marine Warning	CHS		67 min
Aug 17, 6:22 PM EDT	Special Marine Warning	CHS		83 min
Aug 17, 3:15 PM EDT	Special Weather Statement	CHS	Jasper	30 min
Aug 17, 3:52 PM EDT	Special Weather Statement	CHS	Colleton	23 min
Aug 17, 4:01 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Dorchester	59 min
Aug 17, 4:14 PM EDT	Special Weather Statement	CHS	Allendale	31 min
Aug 17, 4:21 PM EDT	Severe Thunderstorm Warning	CHS	Allendale, Hampton	39 min
Aug 17, 4:33 PM EDT	Special Weather Statement	CHS	Berkeley	27 min
Aug 17, 4:56 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston, Colleton, Dorchester	64 min
Aug 17, 5:50 PM EDT	Special Weather Statement	CHS	Berkeley	25 min

Nearby

Special Weather Statements in South Carolina, 2012 Every special weather statement in 2012

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.