Alert archive / South Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Columbia, SC

October 13, 20115 counties in South Carolina

NWS Columbia, SC issued this special weather statement at Oct 13, 2011, 7:39 PM EDT for 5 counties in South Carolina. It was in force for 81 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Oct 13, 2011, 7:39 PM EDT (23:39 UTC)
Expired: Oct 13, 2011, 9:00 PM EDT
In force: 81 min
Issued by: NWS Columbia, SC

Counties Chesterfield County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Sumter County, SC

The radar

The Columbia radar (KCAE), 87 km from the middle of the area, began a volume at 23:40 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.

What was reported inside it

Time	Report	Where	Remark
Oct 13, 8:00 PM EDT	TSTM WND DMG	Camden, SC	BLACK RIVER ELECTRIC CO-OP REPORTED TREES ON POWERLINES IN THE CAMDEN AREA.
Oct 13, 8:05 PM EDT	TSTM WND DMG	4 W Oakland, SC	BLACK RIVER ELECTRIC CO-OP REPORTED TREES ON POWERLINES IN THE ALSTON ROAD AREA.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 11.7 hours before the alert went out and 166 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: 148 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 83 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

285 
WWUS82 KCAE 132339
SPSCAE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
739 PM EDT THU OCT 13 2011

SCZ015-016-022-028-029-031-140100-
CHESTERFIELD-KERSHAW-LANCASTER-LEE-RICHLAND-SUMTER-
739 PM EDT THU OCT 13 2011

...GUSTY WINDS WILL AFFECT PARTS OF CHESTERFIELD...KERSHAW... 
LANCASTER...LEE...AND SUMTER COUNTIES THROUGH 1000 PM...

SHOWERS AND A FEW THUNDERSTORMS WILL AFFECTS PARTS OF  
CHESTERFIELD...KERSHAW...LANCASTER...LEE...AND SUMTER COUNTIES 
THROUGH 1000 PM. SOME OF THE SHOWERS AND THUNDERSTORMS WILL HAVE
WIND GUSTS AROUND 40 MPH...ALONG WITH BRIEF HEAVY DOWNPOURS
AND OCCASIONAL LIGHTNING. 

YOU SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER...AND BE
READY TO TAKE COVER. LISTEN FOR LATER STATEMENTS OR POSSIBLE
WARNINGS. 

&&

LAT...LON 3449 7989 3449 8005 3436 8028 3433 8023
      3437 8018 3423 8011 3415 8015 3402 7994
      3395 7997 3380 8033 3380 8051 3389 8065
      3430 8081 3438 8077 3450 8089 3507 8091
      3494 8078 3482 8079 3481 7994 3462 7978
TIME...MOT...LOC 2335Z 298DEG 34KT 3453 8057 3364 8114

$$

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 Columbia, SC wrote its last area forecast discussion before this special weather statement went out at Oct 13, 4:22 PM EDT, 3 hours 17 minutes earlier.

Area forecast discussion, Oct 13, 4:22 PM EDT, 3 hours 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
422 PM EDT THU OCT 13 2011

.SYNOPSIS...
A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA TONIGHT WITH A
CHANCE FOR SHOWERS AND THUNDERSTORMS. HIGH PRESSURE AND DRIER AIR
WILL BUILD INTO THE AREA FRIDAY AND SATURDAY WITH PLENTY OF
SUNSHINE. DRY WEATHER WILL CONTINUE INTO EARLY NEXT WEEK THEN
ANOTHER FRONT COULD BRING THE CHANCE FOR THUNDERSTORMS DURING THE
MIDDLE OF THE WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
RADAR TRENDS SHOW SHOWERS AND THUNDERSTORMS WILL AFFECT MUCH OF
THE FORECAST AREA DURING THE EVENING. THE STORMS WERE FAST
MOVING. THIS MOVEMENT WITH WEAK INSTABILITY SUPPORT STRONG WIND
GUSTS WITH SOME OF THE THUNDERSTORMS. CONVERGENCE AHEAD OF THE
COLD FRONT AND LIFT ASSOCIATED WITH A NEGATIVE TILT UPPER-LEVEL
TROUGH WERE SUPPORTING THE SHOWERS. THIS SUPPORT WILL SHIFT EAST
OF THE FORECAST AREA LATE TONIGHT.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT
HIGH PRESSURE WILL BUILD IN FRIDAY AND SATURDAY BEHIND TONIGHTS
COLD FRONT. GUSTY WINDS ARE EXPECTED BEHIND THE COLD FRONT ON
FRIDAY. NAM BUFKIT INDICATES 20 TO 25 MPH SURFACE GUSTS POSSIBLE
TO MIX DOWN FROM 30 TO 50 MPH WINDS ALOFT. WINDS MAY GUST HIGHER
ACROSS AREA LAKES AND WILL BE MONITORED FOR POSSIBLE LAKE WIND
ADVISORY TO BE ISSUED FOR TOMORROW. HIGH TEMPERATURES FRIDAY AND
SATURDAY ARE EXPECTED TO BE 5-10 DEGREES ABOVE NORMAL REACHING THE
UPPER 70S TO LOW 80S UNDER SUNNY SKIES. DEWPOINT TEMPS WILL LOWER
INTO THE 40S FRIDAY AND SATURDAY SO OVERNIGHT TEMPS WILL RANGE 10
TO 15 DEGREES BELOW NORMAL.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
THE BEGINNING OF THE EXTENDED FORECAST FEATURES GENERALLY ZONAL FLOW
ALOFT AND HIGH PRESSURE AT THE SURFACE...RESULTING IN CONTINUED
DRY WEATHER AND SEASONABLE TEMPERATURES. UPPER-LEVEL RIDGING ALONG
THE WEST COAST AND INTER-MOUNTAIN WEST BY TUESDAY RESULTS IN
DOWNSTREAM TROUGHING OVER THE MIDDLE PART OF THE COUNTRY. THE
GFS/ECMWF ARE IN GENERAL AGREEMENT WITH THIS SCENARIO BUT DIFFER
ON TIMING AND DEPTH OF THE TROUGH AS IT PUSHES INTO THE FORECAST
AREA. 12Z GFS NOW A LITTLE FASTER AND DEEPER/FARTHER SOUTH WITH
THE CLOSED UPPER TROUGH THAN 00Z EURO MODEL.

WITH MODELS REMAINING IN RELATIVE AGREEMENT HAVE INCREASED POPS TO
CHANCE FOR THUNDERSTORMS. SURFACE MOISTURE WILL INCREASE MONDAY
AND TUESDAY AS A SOUTHERLY FLOW DEVELOPS. IF THE UPPER TROUGH DOES
IN FACT AMPLIFY AS SUGGESTED BY THE MODELS A STRONG COLD FRONT
WILL MOVE ACROSS THE SOUTH EAST US MID NEXT WEEK. MODELS/HPC
GUIDANCE INDICATE A COLD/DRY AIRMASS WILL FILTER IN BEHIND THE
FRONT FOR THURSDAY. HIGHS MAY ONLY REACH INTO THE 60S THURSDAY.

&&

.AVIATION /20Z THURSDAY THROUGH TUESDAY/...
MOSTLY CLOUDY SKIES CURRENTLY IN PLACE...WITH LITTLE RETURNS ON
RADAR. CIGS CONTINUING TO GRADUALLY TREND HIGHER WITH DIURNAL
HEATING. FRONT AND UPPER ENERGY TO MOVE THROUGH THIS EVENING AND
PROVIDE A SHOWER CHANCE...ALONG WITH A SLIGHT CHANCE OF THUNDER.
FOR NOW...WILL CONTINUE TO HANDLE PRECIP CHANCE WITH VCSH...AND
INCLUDE A CB CLOUD GROUP FOR THIS EVENING. CURRENTLY WATCHING A
BATCH OF SHOWERS AND A FEW THUNDERSTORMS MOVING RAPIDLY EAST INTO
WEST CENTRAL GA. IF THIS ACTIVITY HOLDS TOGETHER...IT APPEARS IT
WOULD REACH DNL/AGS AROUND 23Z. WILL AMEND A LITTLE LATER IF/WHEN
CONFIDENCE OF PRECIP AFFECTING TAF SITES WARRANTS. EXPECT
CLEARING TO TAKE PLACE LATE TONIGHT OR EARLY FRIDAY. BREEZY
CONDITIONS MAY DEVELOP FRIDAY.

EXTENDED AVIATION OUTLOOK...NO SIGNIFICANT IMPACTS TO AVIATION
EXPECTED THROUGH MONDAY.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...NONE.
GA...NONE.
&&

Hazardous weather outlook, Oct 13, 4:56 PM EDT, 2 hours 43 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
456 PM EDT THU OCT 13 2011

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-142100-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
456 PM EDT THU OCT 13 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL GEORGIA AND
CENTRAL SOUTH CAROLINA.

.DAY ONE...TONIGHT.

SHOWERS AND THUNDERSTORMS LATE THIS AFTERNOON AND EVENING COULD
POSSIBLY CONTAIN DAMAGING WINDS.

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

WEST WINDS WILL INCREASE TO AROUND 20 KNOTS FRIDAY WITH GUSTS UP
TO 25 KNOTS. A LAKE WIND ADVISORY MAY BE NEEDED FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING.

In the hours before

Local storm report, Oct 13, 6:54 PM EDT, 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
654 PM EDT THU OCT 13 2011

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

0554 PM     TSTM WND DMG     6 W TROY                33.99N 82.40W
10/13/2011                   MCCORMICK          SC   EMERGENCY MNGR

            TREES DOWN ON POWERLINES.

0545 PM     TSTM WND DMG     11 N EVANS              33.67N 82.18W
10/13/2011                   MCCORMICK          SC   EMERGENCY MNGR

            TREES DOWN ON HWY 28 NEAR CLARKS HILL

&&

KILMER

Local storm report, Oct 13, 7:05 PM EDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
705 PM EDT THU OCT 13 2011

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

0559 PM     TSTM WND DMG     5 N BELVEDERE           33.61N 81.94W
10/13/2011                   EDGEFIELD          SC   LAW ENFORCEMENT

            TREE UPROOTED ON POWERLINE ON SHORTCUT RD NEAR FOX CREEK
            HIGH SCHOOL.

0617 PM     TSTM WND DMG     5 NW JOHNSTON           33.88N 81.87W
10/13/2011                   EDGEFIELD          SC   LAW ENFORCEMENT

            TREE ACROSS ROAD NEAR OLD CHAPPELLS FERRY RD AND ANNAS LN

0612 PM     TSTM WND DMG     EDGEFIELD               33.79N 81.93W
10/13/2011                   EDGEFIELD          SC   LAW ENFORCEMENT

            TREES DOWN NEAR PICKENS ST

&&

KILMER

Local storm report, Oct 13, 7:14 PM EDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
714 PM EDT THU OCT 13 2011

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

0622 PM     TSTM WND DMG     RIDGE SPRING            33.85N 81.66W
10/13/2011                   SALUDA             SC   LAW ENFORCEMENT

            TREES DOWN IN RIDGE SPRING AREA.

0625 PM     TSTM WND DMG     5 NW JOHNSTON           33.88N 81.86W
10/13/2011                   SALUDA             SC   LAW ENFORCEMENT

            TREES DOWN ON ROCKY CREEK ROAD

0654 PM     TSTM WND DMG     10 NNW BATESBURG        34.05N 81.60W
10/13/2011                   SALUDA             SC   LAW ENFORCEMENT

            TREES DOWN NEAR LAKE MURRAY ON MT WILLING RD.

&&

KILMER

Local storm report, Oct 13, 7:26 PM EDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
726 PM EDT THU OCT 13 2011

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

0703 PM     TSTM WND DMG     5 SSE IRMO              34.02N 81.15W
10/13/2011                   LEXINGTON          SC   LAW ENFORCEMENT

            HIGHWAY PATROL REPORTED TREES DOWN ALONG CORLEY MILL ROAD
            JUST OFF HWY 378.

&&

VAUGHAN

Special weather statement, Oct 13, 7:29 PM EDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
729 PM EDT THU OCT 13 2011

SCZ035-041-140030-
BAMBERG-BARNWELL-
729 PM EDT THU OCT 13 2011

...GUSTY WINDS IN PARTS OF BAMBERG AND BARNWELL COUNTIES...

NATIONAL WEATHER SERVICE RADAR SHOWED PARTS OF BAMBERG COUNTY
AND SOUTHEASTERN BARNWELL COUNTY WILL HAVE SHOWERS AND
THUNDERSTORMS THROUGH 830 PM.

SOME OF THE THUNDERSTORMS WILL CONTAIN WIND GUSTS NEAR 40 MPH AND
BRIEF HEAVY RAIN...ALONG WITH OCCASIONAL LIGHTNING.

BE ON THE LOOKOUT FOR THREATENING WEATHER...AND BE READY TO TAKE
COVER.

LISTEN FOR LATER STATEMENTS OR POSSIBLE WARNINGS.

&&

LAT...LON 3305 8112 3312 8120 3310 8131 3315 8150
      3343 8120 3341 8119 3341 8116 3322 8084
      3320 8082 3303 8109
TIME...MOT...LOC 2325Z 270DEG 31KT 3337 8102 3287 8102

Special weather statement, Oct 13, 7:39 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
739 PM EDT THU OCT 13 2011

SCZ015-016-022-028-029-031-140100-
CHESTERFIELD-KERSHAW-LANCASTER-LEE-RICHLAND-SUMTER-
739 PM EDT THU OCT 13 2011

...GUSTY WINDS WILL AFFECT PARTS OF CHESTERFIELD...KERSHAW...
LANCASTER...LEE...AND SUMTER COUNTIES THROUGH 1000 PM...

SHOWERS AND A FEW THUNDERSTORMS WILL AFFECTS PARTS OF
CHESTERFIELD...KERSHAW...LANCASTER...LEE...AND SUMTER COUNTIES
THROUGH 1000 PM. SOME OF THE SHOWERS AND THUNDERSTORMS WILL HAVE
WIND GUSTS AROUND 40 MPH...ALONG WITH BRIEF HEAVY DOWNPOURS
AND OCCASIONAL LIGHTNING.

YOU SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER...AND BE
READY TO TAKE COVER. LISTEN FOR LATER STATEMENTS OR POSSIBLE
WARNINGS.

&&

LAT...LON 3449 7989 3449 8005 3436 8028 3433 8023
      3437 8018 3423 8011 3415 8015 3402 7994
      3395 7997 3380 8033 3380 8051 3389 8065
      3430 8081 3438 8077 3450 8089 3507 8091
      3494 8078 3482 8079 3481 7994 3462 7978
TIME...MOT...LOC 2335Z 298DEG 34KT 3453 8057 3364 8114

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 4:31 PM EDT	Special Weather Statement	CAE	Edgefield, McCormick	74 min
Oct 13, 4:52 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell, Edgefield, McCormick	68 min
Oct 13, 5:42 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, McCormick, Saluda	78 min
Oct 13, 6:20 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington, Newberry, Saluda	70 min
Oct 13, 7:01 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Fairfield, Lexington, Newberry, Orangeburg, Richland	74 min
Oct 13, 7:29 PM EDT	Special Weather Statement	CAE	Bamberg	61 min
Oct 13, 7:45 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Chesterfield, Clarendon, Fairfield, Kershaw, Lancaster and 3 more	75 min

Nearby

Special Weather Statements in South Carolina, 2011 Every special weather statement in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.