Alert archive / South Carolina / Areal Flood Advisories in 2021
Areal Flood Advisory 83, NWS Charleston, SC
NWS Charleston, SC issued this areal flood advisory at Aug 3, 2021, 6:36 PM EDT for Colleton County, South Carolina. It was in force for 82 min.
The area
The counties it named.
The facts
- Issued
- Aug 3, 2021, 6:36 PM EDT (22:36 UTC)
- Expired
- Aug 3, 2021, 7:58 PM EDT
- In force
- 82 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
County Colleton County, SC
The radar
The Charleston,SC radar (KCLX), 42 km from the middle of the area, began a volume at 22:36 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
Jacksonville, FL (KJAX), launched 12:00Z, 10.6 hours before the alert went out and 279 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.
- Mixed-layer CAPE
- 464 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -52 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Charleston, SC wrote its last area forecast discussion before this areal flood advisory went out at Aug 2, 7:37 PM EDT, 22 hours 59 minutes earlier.
Area forecast discussion, Aug 2, 7:37 PM EDT, 22 hours 59 minutes before
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</html>The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 8:25 PM EDT | Severe Thunderstorm Warning | CHS | Colleton, Dorchester | 65 min |
| Aug 2, 8:55 PM EDT | Areal Flood Advisory | CHS | Colleton, Dorchester | 95 min |
| Aug 2, 10:11 PM EDT | Special Marine Warning | CHS | 2 hr | |
| Aug 3, 3:02 AM EDT | Flash Flood Watch | CHS | Berkeley, Colleton, Dorchester, Hampton | 19 hr |
| Aug 3, 8:42 AM EDT | Special Marine Warning | CHS | 2 hr | |
| Aug 3, 5:34 PM EDT | Areal Flood Advisory | CHS | Charleston | 87 min |
| Aug 2, 8:02 PM EDT | Special Weather Statement | CHS | Evans, Tattnall | 28 min |
Nearby
Areal Flood Advisories in South Carolina, 2021Every 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.