Alert archive / South Carolina / Special Weather Statements in 2012

Special Weather Statement, NWS Columbia, SC

July 10, 2012Bamberg County, Orangeburg County, South Carolina

NWS Columbia, SC issued this special weather statement at Jul 10, 2012, 2:14 PM EDT for Bamberg County, Orangeburg County, South Carolina. It was in force for 46 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 10, 2012, 2:14 PM EDT (18:14 UTC)
Expired: Jul 10, 2012, 3:00 PM EDT
In force: 46 min
Issued by: NWS Columbia, SC

Counties Bamberg County, SC, Orangeburg County, SC

The radar

The Charleston,SC radar (KCLX), 73 km from the middle of the area, began a volume at 18:13 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, 6.2 hours before the alert went out and 83 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: 1486 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1034 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: -32 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 10, 1:42 PM EDT, 32 minutes earlier.

Area forecast discussion, Jul 10, 1:42 PM EDT, 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE COLUMBIA SC
142 PM EDT TUE JUL 10 2012

.SYNOPSIS...
A STALLING FRONTAL BOUNDARY AND A SURFACE TROUGH WILL BE A FOCUS
FOR SHOWERS AND THUNDERSTORMS THROUGH THE WEEK. HEAVY RAIN WILL
ACCOMPANY STRONGER STORMS. TEMPERATURES WILL COOL THROUGH THE WEEK
PROVIDING NEEDED RELIEF FROM THE RECENT HOT TEMPERATURES.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
RADAR ECHOS HAVE DISSIPATED ACROSS THE AREA THIS MORNING. BEST
CHANCE OF PRECIPITATION SHOULD BE THIS AFTERNOON...SO REMOVED POPS
UNTIL 16Z...NOON WHEN HEATING WILL INCREASE INSTABILITY PLUS
INTERACTION WITH THE FRONT ALONG THE NORTH CAROLINA AND SOUTH
CAROLINA BORDER. MADE MINOR CHANGES TO SKY...WIND AND DEW POINT
GRIDS FOR THE REST OF THIS MORNING.

LITTLE CHANGE IN THE OVERALL WEATHER PATTERN WITH A STRONG UPPER
HIGH CENTERED OVER UTAH AND ANOTHER OFF THE SOUTHEAST COAST WITH
THE UPPER RIDGE BEING SPLIT BY AN UPPER TROUGH AXIS EXTENDING FROM
THE GREAT LAKES SOUTHWARD INTO THE LOWER MISSISSIPPI VALLEY. THIS
CONFIGURATION YIELDS DEEP MOIST SOUTHWESTERLY FLOW ACROSS THE
FORECAST AREA. AT THE SURFACE THE FRONT IS NOW ANALYZED TO BE
ACROSS THE SOUTH CAROLINA/NORTH CAROLINA BORDER WITH A TROUGH OF
LOW PRESSURE EXTENDING FROM AUGUSTA TO MYRTLE BEACH.

ATMOSPHERE WILL AGAIN BE MODERATELY UNSTABLE WITH CAPE VALUES
EXCEEDING 2500 J/KG WITH A WEAKLY SHEARED ENVIRONMENT SUPPORTING
PULSE TYPE STORMS THAT COULD FORM INTO CLUSTERS AND WILL BE SLOW
MOVING AND POSE A HEAVY RAIN THREAT. DIFFERENTIAL HEATING
BOUNDARIES CREATED BY THE LINGERING THICK DEBRIS CLOUDS COULD ALSO
BECOME A FOCUS FOR CONVECTION AND COULD ALTER THE FORECAST LEADING
TO LOWER THAN NORMAL CONFIDENCE IN LOCATION OF STORMS. WILL CARRY
LIKELY POPS ACROSS THE NORTHERN HALF OF THE FORECAST AREA THIS
AFTERNOON WHERE PRECIP WATER VALUES WILL EXCEED 2 INCHES AND
MOISTURE ADVECTION INTO THE SURFACE TROUGH AND FRONTAL ZONE WILL
BE MAXIMIZED...AND HIGH CHANCE POPS ELSEWHERE. SIMILAR TO
MONDAY...EXPECT CONVECTION TO LINGER INTO THE OVERNIGHT HOURS AND
HAVE KEPT POPS HIGHER THROUGHOUT THE NIGHT TO ACCOUNT FOR
LINGERING CONVECTION.

TEMPERATURES TODAY SHOULD BE SLIGHTLY COOLER TODAY THAN MONDAY
WITH MORE CLOUDS AND SLIGHTLY COOLER 850 MB TEMPERATURES EXPECTED.
OVERNIGHT LOWS TONIGHT WILL BE DICTATED BY WHERE STORMS DEVELOP
BUT IN GENERAL WILL FALL INTO THE 70S.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/...
THE UPPER TROUGH AXIS REMAINS TO THE WEST OF THE FORECAST AREA ON
WEDNESDAY WITH THE SURFACE FRONT AND TROUGH IN THE VICINITY
PROVIDING A FOCUS FOR DIURNAL CONVECTION ONCE AGAIN. ADDITIONAL
UPPER SUPPORT WILL COME IN THE FORM OF UPPER DIVERGENCE ASSOCIATED
WITH THE RIGHT ENTRANCE REGION OF AN UPPER JET AND THIS WILL
FURTHER ENHANCE LIFTING GENERATED BY A BUOYANT ATMOSPHERE. WILL
AGAIN CARRY LIKELY POPS ACROSS THE NORTHERN HALF OF THE FORECAST
AREA LATE AFTERNOON INTO THE EVENING HOURS WITH THE EXPECTATION
THAT STORMS WILL LINGER WELL INTO THE OVERNIGHT HOURS. BY
THURSDAY...THE UPPER RIDGE OVER THE WESTERN ATLANTIC BUILDS BACK
WESTWARD ACROSS THE SOUTHEASTERN STATES AND RISES 500 MB HEIGHTS
ACROSS THE REGION. PLENTY OF MOISTURE WILL REMAIN PLACE BUT THE
BUILDING RIDGE SHOULD SUPPRESS CONVECTION A BIT AND WILL CARRY
SOLID CHANCE POPS. MAX TEMPERATURES DURING THIS PERIOD WILL NEAR
TO SLIGHTLY BELOW NORMAL GIVEN CLOUDS AND PRECIPITATION WHILE MIN
TEMPERATURES WILL LIKELY BE ABOVE NORMAL DUE TO CLOUDS AND
INCREASED MOISTURE IN THE ATMOSPHERE.

&&

.LONG TERM /FRIDAY THROUGH MONDAY/...
THE UPPER RIDGE OVER THE WESTERN ATLANTIC WILL CONTINUE TO BUILD
WESTWARD ACROSS THE SOUTHEASTERN AND GULF COAST STATES THROUGH
SUNDAY BEFORE FLATTENING OUT AS AN UPPER TROUGH DIGS ACROSS THE
GREAT LAKES INTO THE MID ATLANTIC ON MONDAY. THE AXIS HIGH PRECIP
WATER VALUES SHIFTS WEST OF THE FORECAST AREA WHICH WILL LOWER
OVERALL PRECIP CHANCES...BUT WILL CONTINUE TO ADVERTISE CHANCE
POPS GIVEN INSTABILITY AND PRESENCE OF A WELL INLAND PENETRATING
SEA BREEZE BOUNDARY AS A FOCUS FOR CONVECTION. TEMPERATURES DURING
THE PERIOD WILL BE NEAR NORMAL.

&&

.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ACROSS THE FORECAST AREA.
COVERAGE IS SCATTERED...BUT PLACED A TEMPO GROUP FOR THUNDERSTORMS
AT ALL TERMINALS THROUGH 20Z. SEVERE WINDS AND VERY HEAVY RAIN
PLUS HAIL ARE POSSIBLE WITH THESE STORMS. THERE WILL BE A LULL
BETWEEN 20Z AND 23Z...BEFORE THE FRONT CROSSES THE REGION. WITH
ALL OF THE MOISTURE AROUND...THERE WILL BE A CHANCE OF AT LEAST
MVFR FOG AT SOME OF THE TERMINAL FORECAST. THE POSSIBILITY OF IFR
CONDITIONS REMAIN...ESPECIALLY IN THUNDERSTORMS.

EXTENDED AVIATION OUTLOOK...MVFR OR IFR CONDITIONS MAY OCCUR IN
MAINLY AFTERNOON AND EVENING THUNDERSTORMS THROUGH SATURDAY. LOW
CLOUDINESS AND FOG MAY OCCUR...MAINLY DURING THE EARLY MORNING
HOURS.

&&

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

Hazardous weather outlook, Jul 10, 4:23 AM EDT, 9 hours 51 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
423 AM EDT TUE JUL 10 2012

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-110830-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
423 AM EDT TUE JUL 10 2012

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

.DAY ONE...TODAY AND TONIGHT.

ISOLATED TO SCATTERED SEVERE THUNDERSTORMS ARE POSSIBLE WITH
DAMAGING WIND GUSTS AND LARGE HAIL POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

ISOLATED TO SCATTERED SEVERE THUNDERSTORMS ARE POSSIBLE AGAIN ON
WEDNESDAY WITH DAMAGING WIND GUSTS AND LARGE HAIL POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Jul 10, 1:41 PM EDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
141 PM EDT TUE JUL 10 2012

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

0137 PM     HAIL             4 NNE BAMBERG           33.35N 81.01W
07/10/2012  E0.88 INCH       ORANGEBURG         SC   PUBLIC

            NICKEL SIZE HAIL REPORTED NEAR COPE ALONG WITH WINDY
            CONDITIONS.

&&

VAUGHAN

Local storm report, Jul 10, 2:00 PM EDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
200 PM EDT TUE JUL 10 2012

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

0155 PM     TSTM WND DMG     1 NNE BAMBERG           33.31N 81.03W
07/10/2012                   BAMBERG            SC   DEPT OF HIGHWAYS

            DOT REPORTS A FEW TREES DOWN IN THE BAMBERG AREA OVER TO
            DENMARK.

&&

SJN

Special weather statement, Jul 10, 2:14 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
214 PM EDT TUE JUL 10 2012

SCZ036-041-101900-
BAMBERG-ORANGEBURG-
214 PM EDT TUE JUL 10 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BAMBERG AND
ORANGEBURG COUNTIES THROUGH 300 PM EDT...

AT 210 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR GOVAN...MOVING NORTHEAST AT 10 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
BAMBERG...BOWMAN AND BRANCHVILLE...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
DIME SIZE HAIL...

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 3303 8107 3328 8121 3348 8079 3343 8023
      3330 8050 3333 8051
TIME...MOT...LOC 1815Z 237DEG 8KT 3323 8107

SJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:56 PM EDT	Special Weather Statement	CAE	Calhoun, Clarendon, Edgefield, Lexington, Richland, Saluda and 1 more	64 min
Jul 9, 10:08 PM EDT	Special Weather Statement	CAE	Aiken, Calhoun, Clarendon, Edgefield, Lexington, Orangeburg and 2 more	67 min
Jul 10, 12:31 AM EDT	Special Weather Statement	CAE	Richland	59 min
Jul 10, 1:01 AM EDT	Special Weather Statement	CAE	Lexington	59 min
Jul 10, 1:13 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg, Barnwell, Orangeburg	47 min
Jul 10, 2:26 PM EDT	Severe Thunderstorm Warning	CAE	Bamberg	49 min
Jul 10, 2:54 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Kershaw, Richland	51 min
Jul 10, 3:11 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Clarendon, Sumter	49 min
Jul 10, 3:40 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Lee, Richland, Sumter	50 min
Jul 10, 4:15 PM EDT	Severe Thunderstorm Warning	CAE	Kershaw, Lee, Sumter	45 min
Jul 10, 4:19 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Newberry	26 min
Jul 10, 4:54 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	51 min
Jul 10, 5:35 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington	40 min
Jul 10, 5:44 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Lexington, Newberry, Richland, Saluda	46 min
Jul 10, 6:26 PM EDT	Severe Thunderstorm Warning	CAE	Fairfield, Lexington, Richland	49 min
Jul 10, 7:13 PM EDT	Areal Flood Advisory	CAE	Richland	62 min
Jul 10, 7:19 PM EDT	Flash Flood Warning	CAE	Richland	56 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.