Alert archive / South Carolina / Flash Flood Watches in 2019

Flash Flood Watch 1, NWS Columbia, SC

June 8, 2019Chesterfield County, Lancaster County, South Carolina

NWS Columbia, SC issued this flash flood watch at Jun 8, 2019, 3:24 AM EDT for Chesterfield County, Lancaster County, South Carolina. It took effect at Jun 8, 2019, 8:00 AM EDT. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Jun 8, 2019, 3:24 AM EDT (07:24 UTC)
In effect from: Jun 8, 2019, 8:00 AM EDT
Expired: Jun 9, 2019, 1:16 PM EDT
In force: 29 hr
Issued by: NWS Columbia, SC
Flood severity: None

Counties Chesterfield County, SC, Lancaster County, SC

The radar

The Columbia radar (KCAE), 101 km from the middle of the area, began a volume at 07:26 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

Roanoke, VA (KRNK), launched 00:00Z, 7.4 hours before the alert went out and 294 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 143 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 flash flood watch 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 flash flood watch went out at Jun 8, 1:51 AM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jun 8, 1:51 AM EDT, 1 hour 33 minutes before

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Hazardous weather outlook, Jun 7, 4:27 AM EDT, 22 hours 57 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
Jun 7, 8:32 PM EDT	Areal Flood Advisory	CAE	Calhoun, Edgefield, Kershaw, Lee, Lexington, Newberry and 3 more	118 min
Jun 8, 2:27 PM EDT	Areal Flood Advisory	CAE	Edgefield, McCormick	3 hr
Jun 8, 2:54 PM EDT	Special Weather Statement	CAE	Bamberg	51 min
Jun 8, 3:25 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Barnwell, Calhoun, Lexington, Orangeburg	50 min
Jun 8, 3:46 PM EDT	Areal Flood Advisory	CAE	Kershaw, Lexington, Richland	3 hr
Jun 8, 3:55 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Calhoun, Fairfield, Kershaw, Lexington, Newberry and 2 more	65 min
Jun 8, 4:28 PM EDT	Severe Thunderstorm Warning	CAE	Aiken, Edgefield, McCormick	47 min
Jun 8, 4:50 PM EDT	Areal Flood Advisory	CAE	Aiken, Edgefield	3 hr
Jun 8, 6:36 PM EDT	Areal Flood Advisory	CAE	Edgefield, McCormick	3 hr
Jun 8, 7:53 PM EDT	Special Weather Statement	CAE	Aiken	37 min
Jun 8, 6:27 PM EDT	Special Weather Statement	CAE	Burke	48 min
Jun 8, 6:53 PM EDT	Special Weather Statement	CAE	Columbia, McDuffie, Richmond	52 min
Jun 8, 7:26 PM EDT	Special Weather Statement	CAE	Richmond	34 min

Nearby

Flash Flood Watches in South Carolina, 2019 Every flash flood watch in 2019

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.