Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

July 13, 2012Allendale County, South Carolina

NWS Charleston, SC issued this special weather statement at Jul 13, 2012, 2:55 PM EDT for Allendale County, South Carolina. It was in force for 50 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: Jul 13, 2012, 2:55 PM EDT (18:55 UTC)
Expired: Jul 13, 2012, 3:45 PM EDT
In force: 50 min
Issued by: NWS Charleston, SC

County Allendale County, SC

The radar

The Charleston,SC radar (KCLX), 63 km from the middle of the area, began a volume at 18:56 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, 6.9 hours before the alert went out and 145 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: 2764 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 551 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -40 m²/s²
0-3 km storm-relative helicity: 4 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 Jul 13, 2:06 PM EDT, 49 minutes earlier.

Area forecast discussion, Jul 13, 2:06 PM EDT, 49 minutes before

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Hazardous weather outlook, Jul 13, 3:42 AM EDT, 11 hours 13 minutes before

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In the hours before

Special weather statement, Jul 13, 11:19 AM EDT, 3 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
ISSUED BY NATIONAL WEATHER SERVICE WILMINGTON NC
1119 AM EDT FRI JUL 13 2012

SCZ043-044-131615-
DORCHESTER-INLAND COLLETON-
1119 AM EDT FRI JUL 13 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS COLLETON AND DORCHESTER
COUNTIES THROUGH 1215 PM EDT...

AT 1119 AM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
SMOAKS...OR ABOUT 14 MILES SOUTHWEST OF SAINT GEORGE...MOVING
NORTHWEST AT 15 MPH.

SOME LOCATIONS IMPACTED INCLUDE RUFFIN...SMOAKS...WILLIAMS...CAT
HOLE...SMYLY AND SPRINGTOWN.

HAZARDS INCLUDE...
PEA SIZE HAIL.
GUSTY WINDS OF 30 TO 40 MPH.

HEAVY RAINFALL AND MINOR FLOODING.

THUNDERSTORMS CAN POSE A VARIETY OF THREATS INCLUDING GUSTY WINDS...
SMALL HAIL...CLOUD TO GROUND LIGHTNING...AND LOCALIZED FLOODING. IT
IS RECOMMENDED THAT YOU REMAIN INDOORS UNTIL THE STORMS PASS.

&&

LAT...LON 3308 8062 3298 8083 3312 8090 3313 8090
      3322 8073 3324 8068
TIME...MOT...LOC 1519Z 147DEG 11KT 3310 8080

15

Special weather statement, Jul 13, 12:38 PM EDT, 2 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
ISSUED BY NATIONAL WEATHER SERVICE WILMINGTON NC
1238 PM EDT FRI JUL 13 2012

GAZ087-088-100-131745-
BULLOCH-JENKINS-SCREVEN-
1238 PM EDT FRI JUL 13 2012

...STRONG THUNDERSTORMS WILL MOVE ACROSS BULLOCH...JENKINS AND
SCREVEN COUNTIES THROUGH 145 PM EDT...

AT 1238 PM EDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS OVER
OGEECHEE...OR ABOUT 9 MILES SOUTHWEST OF SYLVANIA...MOVING NORTH AT
10 MPH.

SOME LOCATIONS IMPACTED INCLUDE SYLVANIA...ALTMAN...CAPTOLO...
DOVER...HILLTONIA...MILLHAVEN...PERKINS...ROCKY FORD...SCARBORO...
WOODCLIFF...BASCOM AND BLITCH.

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.

FREQUENT CLOUD TO GROUND LIGHTNING.

HEAVY RAINFALL AND MINOR FLOODING.

THUNDERSTORMS CAN POSE A VARIETY OF THREATS INCLUDING GUSTY WINDS...
SMALL HAIL...CLOUD TO GROUND LIGHTNING...AND LOCALIZED FLOODING. IT
IS RECOMMENDED THAT YOU REMAIN INDOORS UNTIL THE STORMS PASS.

&&

LAT...LON 3293 8196 3296 8187 3296 8185 3293 8178
      3291 8177 3300 8164 3299 8162 3257 8160
      3254 8180 3292 8201
TIME...MOT...LOC 1638Z 168DEG 10KT 3264 8172

15

Special weather statement, Jul 13, 2:55 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
ISSUED BY NATIONAL WEATHER SERVICE WILMINGTON NC
255 PM EDT FRI JUL 13 2012

GAZ088-SCZ040-131945-
ALLENDALE-SCREVEN-
255 PM EDT FRI JUL 13 2012

...A STRONG THUNDERSTORM WILL MOVE ACROSS SCREVEN AND ALLENDALE
COUNTIES THROUGH 345 PM EDT...

AT 255 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 6 MILES
EAST OF HILLTONIA...OR ABOUT 10 MILES NORTHEAST OF SYLVANIA...MOVING
NORTH AT 15 MPH.

SOME LOCATIONS IMPACTED INCLUDE HILLTONIA...MARTIN...MILLETT...
MILLHAVEN...AVERILL...BASCOM AND MILBURY.

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.

FREQUENT CLOUD TO GROUND LIGHTNING.

HEAVY RAINFALL AND MINOR FLOODING.

THUNDERSTORMS CAN POSE A VARIETY OF THREATS INCLUDING GUSTY WINDS...
SMALL HAIL...CLOUD TO GROUND LIGHTNING...AND LOCALIZED FLOODING. IT
IS RECOMMENDED THAT YOU REMAIN INDOORS UNTIL THE STORMS PASS.

&&

LAT...LON 3304 8157 3305 8157 3308 8162 3310 8162
      3316 8154 3314 8146 3313 8144 3309 8143
      3282 8141 3278 8164 3294 8172
TIME...MOT...LOC 1855Z 169DEG 13KT 3289 8155

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 12:38 PM EDT	Special Weather Statement	CHS	Screven	67 min
Jul 13, 11:19 AM EDT	Special Weather Statement	CHS	Bamberg	56 min
Jul 13, 4:17 PM EDT	Special Weather Statement	CHS	Berkeley	43 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.