Alert archive / South Carolina / Areal Flood Advisories in 2021

Areal Flood Advisory 37, NWS Columbia, SC

July 19, 20216 counties in South Carolina

NWS Columbia, SC issued this areal flood advisory at Jul 19, 2021, 9:02 PM EDT for 6 counties in South Carolina. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 19, 2021, 9:02 PM EDT (01:02 UTC)
Expired: Jul 20, 2021, 12:00 AM EDT
In force: 3 hr
Issued by: NWS Columbia, SC
Area: Storm-based polygon

Counties Aiken County, SC, Calhoun County, SC, Edgefield County, SC, Lexington County, SC, Richland County, SC, Saluda County, SC

The radar

The Columbia radar (KCAE), 28 km from the middle of the area, began a volume at 01:01 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.0 hours before the alert went out and 293 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: 569 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 673 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jul 19, 7:59 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jul 19, 7:59 PM EDT, 1 hour 3 minutes before

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Hazardous weather outlook, Jul 19, 3:52 AM EDT, 17 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service Columbia SC
352 AM EDT Mon Jul 19 2021

GAZ040-063>065-077-SCZ016-018-020>022-025>031-035-037-038-041-115-
116-135>137-200800-
Lincoln-McDuffie-Columbia-Richmond-Burke-Chesterfield-McCormick-
Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-Richland-Lee-
Aiken-Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northern Lancaster-
Southern Lancaster-Northwestern Orangeburg-Central Orangeburg-
Southeastern Orangeburg-
352 AM EDT Mon Jul 19 2021

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...Today and tonight.

Locally heavy rain possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Locally heavy rain possible Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jul 19, 4:34 PM EDT, 4 hours 28 minutes before

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Local storm report, Jul 19, 8:42 PM EDT, 20 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:14 PM EDT	Areal Flood Advisory	CAE	Calhoun, Clarendon, Orangeburg	2 hr
Jul 19, 11:39 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, Saluda	111 min
Jul 20, 9:16 AM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, Saluda	3 hr
Jul 20, 1:18 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, Saluda	3 hr
Jul 20, 4:05 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield	3 hr
Jul 20, 5:07 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, Saluda	3 hr
Jul 20, 3:44 PM EDT	Special Weather Statement	CAE	Richmond	61 min

Nearby

Areal Flood Advisories in South Carolina, 2021 Every areal flood advisory in 2021

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.