Alert archive / South Carolina / Special Weather Statements in 2013

Special Weather Statement, NWS Columbia, SC

July 11, 2013Sumter County, South Carolina

NWS Columbia, SC issued this special weather statement at Jul 11, 2013, 7:06 PM EDT for Sumter County, South Carolina. It was in force for 24 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 11, 2013, 7:06 PM EDT (23:06 UTC)
Expired: Jul 11, 2013, 7:30 PM EDT
In force: 24 min
Issued by: NWS Columbia, SC

County Sumter County, SC

The radar

The Columbia radar (KCAE), 79 km from the middle of the area, began a volume at 23:08 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, 11.1 hours before the alert went out and 114 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: 902 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 692 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -58 m²/s²
0-3 km storm-relative helicity: -28 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 Columbia, SC wrote its last area forecast discussion before this special weather statement went out at Jul 11, 2:30 PM EDT, 4 hours 36 minutes earlier.

Area forecast discussion, Jul 11, 2:30 PM EDT, 4 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
230 PM EDT THU JUL 11 2013

.SYNOPSIS...
HIGH PRESSURE CENTERED OFF THE COAST WILL CONTINUE TO CIRCULATE
VERY MOIST AIR INTO THE FORECAST AREA AHEAD OF A COLD FRONT
APPROACHING FROM THE NORTHWEST. THIS FRONT WILL STALL NEAR THE
AREA FRIDAY.

&&

.NEAR TERM /THROUGH TONIGHT/...
SHOWERS AND THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER THE WESTERN
MIDLANDS AND NORTHERN CSRA AS THE COLD FRONT PUSHES THROUGH THE
UPSTATE. EXPECT THE COVERAGE AND INTENSITY OF THE SHOWERS AND
THUNDERSTORMS TO INCREASE THROUGH THE AFTERNOON HOURS WITH THE
THREAT OF FLOODING BEING THE MAIN CONCERN. INITIAL REPORTS FROM
THE TIP OF LANCASTER COUNTY INDICATE RAINFALL RATES BETWEEN ONE
AND TWO INCHES PER HOUR. WITH SEVERAL RIVERS AT OR ABOVE FLOOD
STAGE...UPSTREAM RESERVOIRS NEAR CAPACITY AND THE GROUND
SATURATED FROM RAINFALL OVER THE PAST SEVERAL DAYS THE THREAT OF
FLOODING IS A REAL CONCERN THIS AFTERNOON INTO TONIGHT. AS SUCH
WILL KEEP THE FLASH FLOOD WATCH IN PLACE FROM 2PM THIS AFTERNOON
THROUGH 4AM FRIDAY MORNING. WITH THE RAINFALL AND EXTENSIVE
CLOUD COVER EXPECTED OVERNIGHT LOWS WILL BE IN THE LOWER 70S.

&&

.SHORT TERM /FRIDAY THROUGH FRIDAY NIGHT/...
WITH PLENTY OF MOISTURE AVAILABLE...CONVERGENCE AHEAD OF THE
APPROACHING COLD FRONT AND A DEEPENING UPPER-LEVEL TROUGH
SUPPORTS NUMEROUS SHOWERS AND THUNDERSTORMS TO ONCE AGAIN DEVELOP
FRIDAY INTO FRIDAY NIGHT. HIGH PRECIPITABLE WATER INDICATES A CONTINUED
THREAT OF EXCESSIVE RAIN AND WITH SLOW MOVING STORMS...URBAN AND
SMALL STREAM FLOODING WILL CONTINUE TO BE LIKELY IN THE AFFECTED AREAS.
THE MODELS SHOW THE FRONT STALLING JUST EAST OF THE FORECAST AREA.
THE TREND OF AFTERNOON THROUGH EVENING THUNDERSTORMS CONTINUES.
TEMPERATURES WILL STAY MAINLY HIGHS IN THE 80S AND LOWS IN THE LOW
70S.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
SATURDAY WILL BE MORE OF THE SAME WITH AFTERNOON SHOWERS AND
THUNDERSTORMS. THE GFS AND ECMWF CONTINUE TO SHOW A MOIST ONSHORE
FLOW. THE GENERAL PATTERN STILL SUPPORTS SCATTERED TO NUMEROUS
SHOWERS AND THUNDERSTORMS WITH THE HIGHER POPS EARLY IN THE
PERIOD. MODELS INDICATE THE UPPER TROUGHING BEGINNING TO SHIFT
WESTWARD BY SUNDAY WITH THE UPPER HIGH NORTH OF THE AREA BECOMING
MORE DOMINATE EARLY NEXT WEEK. WHILE THIS SHOULD RESULT IN A
DECREASE IN PRECIPITABLE WATER AND A DECREASE IN CHANCE OF SHOWERS
AND THUNDERSTORMS...THERE STILL WILL BE A CHANCE OF AFTERNOON
PRECIPITATION INTO EARLY NEXT WEEK. TEMPERATURES ARE EXPECTED TO
BE CLOSER TO NORMAL WITH HIGHS AROUND 90 AND LOWS IN THE LOWER 70S.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
VFR CONDITIONS FOR MOST OF THE PERIOD...WITH RESTRICTIONS POSSIBLE
IN SHOWERS AND THUNDERSTORMS.

CUMULUS CLOUDS CONTINUE TO DEVELOP AS A COLD FRONT PUSHES THROUGH
THE UPSTATE AND TOWARD THE TAF SITES. SHOWERS AND ISOLATED
THUNDERSTORMS HAVE DEVELOPED AHEAD OF THE FRONT WITH HEAVY
RAINFALL...ONE INCH PLUS PER HOUR...CURRENTLY BEING REPORTED JUST
SOUTH OF CLT. EXPECT CONVECTION TO INCREASE IN INTENSITY AND
CONTINUE SLOWLY MOVING EASTWARD THROUGH THE AFTERNOON AND TONIGHT.
HAVE ADJUSTED TAFS TO INCLUDE TEMPO FOR RESTRICTIONS IN SHOWERS
AND THUNDERSTORMS AT ALL TAF SITES OVER THE NEXT SEVERAL HOURS.
CONVECTION WILL DECREASE IN COVERAGE TONIGHT...HOWEVER SOME
ACTIVITY IS EXPECTED THROUGH THE NIGHT WHICH WILL LIMIT FOG
POTENTIAL. HAVE INCLUDED MVFR CONDITIONS IN FOG AND STRATUS DURING
THE EARLY MORNING HOURS WITH CONDITIONS RETURNING TO VFR WITH
SUNRISE AND ONSET OF MIXING. CONVECTION WILL AGAIN BE POSSIBLE
LATE IN THE TAF PERIOD...HOWEVER CONFIDENCE IS CURRENTLY TOO LOW
TO INCLUDE IN TAFS.

EXTENDED AVIATION OUTLOOK...RESTRICTIONS POSSIBLE EACH DAY IN
LATE NIGHT/EARLY MORNING FOG OR STRATUS AS WELL AS SCATTERED
MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR SCZ015-016-018-
     020>022-025>031-035>038-041.
GA...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR GAZ040-063>065-077.
&&

Hazardous weather outlook, Jul 11, 3:43 AM EDT, 15 hours 23 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
343 AM EDT THU JUL 11 2013

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-120745-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
343 AM EDT THU JUL 11 2013

...FLASH FLOOD WATCH IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH
LATE TONIGHT...

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

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   FLASH FLOOD WATCH.
   RIVER FLOOD WARNINGS.

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

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARD.

RIVER FLOOD WARNINGS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 11, 6:27 PM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
627 PM EDT THU JUL 11 2013

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

0445 PM     FLASH FLOOD      1 SSE COLUMBIA          33.99N 81.03W
07/11/2013                   RICHLAND           SC   OTHER FEDERAL

            ROCKY BRANCH USGS GAUGE AT WHALEY AND MAIN
            WENT ABOVE FLOOD STAGE TO 8.98 FT. COLUMBIA
            POLICE DEPARTMENT REPORTED STREET FLOODING.

&&

IRIS SYSTEM

Local storm report, Jul 11, 6:55 PM EDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
655 PM EDT THU JUL 11 2013

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

0627 PM     FLASH FLOOD      2 SSE SPRINGDALE        34.66N 80.77W
07/11/2013                   LANCASTER          SC   LAW ENFORCEMENT

            LANCASTER COUNTY DISPATCH REPORTED HOMES
            FLOODED ON DEPUTY BRENT MCCANTS AVE.

&&

IRIS SYSTEM

Local storm report, Jul 11, 7:01 PM EDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
701 PM EDT THU JUL 11 2013

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

0642 PM     FLASH FLOOD      5 NW AUGUSTA            33.51N 82.06W
07/11/2013                   RICHMOND           GA   LAW ENFORCEMENT

            RICHMOND COUNTY DISPATCH REPORTED WARREN RD.
            IS FLOODED AND IMPASSABLE.

&&

IRIS SYSTEM

Special weather statement, Jul 11, 7:06 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
706 PM EDT THU JUL 11 2013

SCZ031-038-112330-
CLARENDON-SUMTER-
706 PM EDT THU JUL 11 2013

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SUMTER AND CLARENDON
COUNTIES THROUGH 730 PM EDT...

AT 704 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR SOUTH SUMTER...MOVING NORTHEAST AT 15 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
MILLWOOD...MULBERRY AND SOUTH SUMTER...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PEA SIZE HAIL...
TORRENTIAL RAIN WHICH MAY PRODUCE LOCALIZED FLOODING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...OR USE
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.COLUMBIA.GOV TO RELAY
SEVERE WEATHER REPORTS. &&

LAT...LON 3370 8039 3385 8052 3402 8026 3399 8025
      3399 8022 3397 8018 3396 8018 3395 8016
      3390 8007
TIME...MOT...LOC 2306Z 234DEG 24KT 3383 8036

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 3:40 AM EDT	Flash Flood Watch	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 10 more	32 hr
Jul 11, 6:24 AM EDT	Areal Flood Advisory	CAE	McCormick	12 hr
Jul 11, 9:30 AM EDT	River Flood Warning	CAE	Aiken	3 days
Jul 11, 1:52 PM EDT	Areal Flood Advisory	CAE	Lancaster	53 min
Jul 11, 3:25 PM EDT	Areal Flood Advisory	CAE	Lexington, Richland	65 min
Jul 11, 3:31 PM EDT	Areal Flood Advisory	CAE	Chesterfield, Kershaw	59 min
Jul 11, 3:49 PM EDT	Areal Flood Advisory	CAE	Saluda	56 min
Jul 11, 4:16 PM EDT	Areal Flood Advisory	CAE	Richland	59 min
Jul 11, 4:44 PM EDT	Flash Flood Warning	CAE	Richland	61 min
Jul 11, 5:06 PM EDT	Areal Flood Advisory	CAE	Calhoun, Lexington, Richland	54 min
Jul 11, 5:17 PM EDT	Areal Flood Advisory	CAE	Lancaster	58 min
Jul 11, 5:32 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, McCormick	118 min
Jul 11, 5:53 PM EDT	Flash Flood Warning	CAE	Lancaster	112 min
Jul 11, 6:55 PM EDT	Areal Flood Advisory	CAE	Fairfield, Kershaw, Lancaster	110 min
Jul 11, 7:00 PM EDT	Areal Flood Advisory	CAE	Fairfield, Kershaw, Lancaster	105 min
Jul 11, 7:32 PM EDT	Areal Flood Advisory	CAE	Clarendon, Lee, Sumter	118 min
Jul 11, 7:59 PM EDT	Areal Flood Advisory	CAE	Calhoun, Orangeburg	2 hr
Jul 11, 5:53 PM EDT	Flash Flood Warning	CAE	Richmond	82 min
Jul 11, 6:21 PM EDT	Flash Flood Warning	CAE	Columbia	84 min

Nearby

Special Weather Statements in South Carolina, 2013 Every special weather statement 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.