Alert archive / South Carolina / Areal Flood Advisories in 2012

Areal Flood Advisory 8, NWS Columbia, SC

May 17, 2012Aiken County, Barnwell County, South Carolina

NWS Columbia, SC issued this areal flood advisory at May 17, 2012, 3:53 AM EDT for Aiken County, Barnwell County, South Carolina. It was in force for 112 min.

The area

The counties it named.

The facts

Issued: May 17, 2012, 3:53 AM EDT (07:53 UTC)
Expired: May 17, 2012, 5:45 AM EDT
In force: 112 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Aiken County, SC, Barnwell County, SC

The radar

The Columbia radar (KCAE), 72 km from the middle of the area, began a volume at 07:56 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 00:00Z, 7.9 hours before the alert went out and 154 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: 1393 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1014 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory 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 areal flood advisory went out at May 17, 3:15 AM EDT, 38 minutes earlier.

Area forecast discussion, May 17, 3:15 AM EDT, 38 minutes before

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Hazardous weather outlook, May 17, 3:29 AM EDT, 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE COLUMBIA SC
329 AM EDT THU MAY 17 2012

GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-180730-
LINCOLN-MCDUFFIE-COLUMBIA-RICHMOND-BURKE-LANCASTER-CHESTERFIELD-
MCCORMICK-NEWBERRY-FAIRFIELD-KERSHAW-EDGEFIELD-SALUDA-LEXINGTON-
RICHLAND-LEE-AIKEN-SUMTER-BARNWELL-ORANGEBURG-CALHOUN-CLARENDON-
BAMBERG-
329 AM EDT THU MAY 17 2012

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

.DAY ONE...TODAY AND TONIGHT.

AFTERNOON INSTABILITY AND COLD TEMPERATURES ALOFT COULD RESULT IN
ISOLATED SEVERE STORMS. THE SLOW MOVING NATURE OF STORMS THAT
DEVELOP WILL ALSO BRING THE POTENTIAL FOR ISOLATED FLOODING.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, May 16, 10:06 PM EDT, 5 hours 47 minutes before

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Local storm report, May 16, 10:15 PM EDT, 5 hours 38 minutes before

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Local storm report, May 16, 10:15 PM EDT, 5 hours 38 minutes before

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Local storm report, May 16, 10:18 PM EDT, 5 hours 35 minutes before

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Local storm report, May 16, 10:18 PM EDT, 5 hours 35 minutes before

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Special weather statement, May 17, 3:07 AM EDT, 46 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 8:03 PM EDT	Areal Flood Advisory	CAE	Kershaw, Lexington, Richland, Saluda	117 min
May 16, 8:23 PM EDT	Severe Thunderstorm Warning	CAE	Richland	37 min
May 16, 8:29 PM EDT	Special Weather Statement	CAE	Richland	61 min
May 16, 9:05 PM EDT	Special Weather Statement	CAE	Richland	55 min
May 16, 9:35 PM EDT	Flash Flood Warning	CAE	Richland	76 min
May 16, 9:42 PM EDT	River Flood Advisory	CAE	Lexington, Richland	9 hr
May 16, 9:55 PM EDT	River Flood Warning	CAE	Calhoun, Lexington, Richland	13 hr
May 17, 3:07 AM EDT	Special Weather Statement	CAE	Barnwell	53 min
May 17, 12:07 PM EDT	Special Weather Statement	CAE	Chesterfield	23 min
May 17, 12:32 PM EDT	Special Weather Statement	CAE	Fairfield	43 min
May 17, 1:01 PM EDT	Severe Thunderstorm Warning	CAE	Newberry	44 min
May 17, 1:39 PM EDT	Severe Thunderstorm Warning	CAE	Newberry, Saluda	51 min
May 17, 2:39 PM EDT	Special Weather Statement	CAE	Kershaw, Lee	51 min
May 17, 3:18 PM EDT	Severe Thunderstorm Warning	CAE	Calhoun, Richland, Sumter	42 min
May 17, 4:30 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Lexington	45 min
May 17, 3:27 PM EDT	Severe Thunderstorm Warning	CAE	Lincoln	33 min

Nearby

Areal Flood Advisories in South Carolina, 2012 Every areal flood advisory 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.