Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

August 23, 2012Berkeley County, South Carolina

NWS Charleston, SC issued this special weather statement at Aug 23, 2012, 5:23 PM EDT for Berkeley County, South Carolina. It was in force for 37 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 23, 2012, 5:23 PM EDT (21:23 UTC)
Expired: Aug 23, 2012, 6:00 PM EDT
In force: 37 min
Issued by: NWS Charleston, SC

County Berkeley County, SC

The radar

The Charleston,SC radar (KCLX), 117 km from the middle of the area, began a volume at 21:26 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, 9.4 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: 1061 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 589 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.5

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 23, 1:54 PM EDT, 3 hours 29 minutes earlier.

Area forecast discussion, Aug 23, 1:54 PM EDT, 3 hours 29 minutes before

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Hazardous weather outlook, Aug 23, 5:14 AM EDT, 12 hours 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
514 AM EDT THU AUG 23 2012

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>052-240915-
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-
514 AM EDT THU AUG 23 2012

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

.DAY ONE...TODAY AND TONIGHT.

WATERSPOUTS...LIGHT AND VARIABLE WINDS ALONG WITH MOIST AND UNSTABLE
CONDITIONS ACROSS THE INTRACOASTAL AND NEAR SHORE COASTAL WATERS
MAY LEAD TO AN ENHANCED RISK FOR WATERSPOUTS THROUGH THE MORNING
HOURS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

TROPICAL WEATHER...IMPACTS ASSOCIATED WITH TROPICAL CYCLONE ISAAC WILL
BE POSSIBLE BEGINNING IN THE EARLY TO MIDDLE PART OF NEXT WEEK. FOR
THE LATEST OFFICIAL FORECAST INFORMATION...REFER TO ADVISORIES
ISSUED BY THE NATIONAL HURRICANE CENTER.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ASSISTANCE IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, Aug 23, 12:33 PM EDT, 4 hours 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
ISSUED BY NATIONAL WEATHER SERVICE COLUMBIA SC
1233 PM EDT THU AUG 23 2012

GAZ117>119-SCZ051-231730-
COASTAL BRYAN-COASTAL CHATHAM-COASTAL JASPER-INLAND CHATHAM-
1233 PM EDT THU AUG 23 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BRYAN...JASPER AND
CHATHAM COUNTIES THROUGH 130 PM EDT...

AT 1230 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR PARKERSBURG. THIS STORM IS NEARLY
STATIONARY AND HAS POTENTIAL TO PRODUCE LOCALLY HEAVY RAIN. RAINFALL
AMOUNTS UP TO 3.00 INCHES IS POSSIBLE WITH THIS STORM.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BURROUGHS...FORT MCALLISTER...ISLE OF HOPE...RIVERSIDE...SANDFLY...
SAVANNAH...SKIDAWAY ISLAND...THUNDERBOLT...TYBEE ISLAND...
VERNONBURG...WHITE BLUFF...WILMINGTON ISLAND AND WINDSOR FOREST...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 30 TO 40 MPH...
TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR CALL THE NATIONAL WEATHER SERVICE TOLL FREE AT 1...8 7
7...6 3 3...6 7 7 2.

&&

LAT...LON 3175 8109 3184 8123 3191 8122 3189 8123
      3189 8124 3196 8129 3213 8111 3212 8113
      3209 8109 3209 8108 3211 8111 3210 8108
      3219 8105 3207 8088 3205 8089 3203 8087
      3203 8084 3201 8083
TIME...MOT...LOC 1631Z 271DEG 3KT 3199 8104

AWP

Local storm report, Aug 23, 1:50 PM EDT, 3 hours 33 minutes before

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Local storm report, Aug 23, 4:24 PM EDT, 59 minutes before

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Special weather statement, Aug 23, 5:23 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 23, 12:33 PM EDT	Special Weather Statement	CHS	Chatham	57 min
Aug 23, 3:07 PM EDT	Special Marine Warning	CHS		53 min
Aug 23, 7:21 PM EDT	Special Marine Warning	CHS		81 min
Aug 23, 3:50 PM EDT	Tornado Warning	CHS	Charleston, Colleton	52 min
Aug 23, 4:38 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	67 min
Aug 23, 5:37 PM EDT	Areal Flood Advisory	CHS	Berkeley	83 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.