Alert archive / Georgia / Areal Flood Advisories in 2021

Areal Flood Advisory 86, NWS Charleston, SC

August 6, 2021Bulloch County, Evans County, Screven County, Georgia

NWS Charleston, SC issued this areal flood advisory at Aug 6, 2021, 5:33 PM EDT for Bulloch County, Evans County, Screven County, Georgia. It was in force for 117 min.

The area

The counties it named.

The facts

Issued
Aug 6, 2021, 5:33 PM EDT (21:33 UTC)
Expired
Aug 6, 2021, 7:30 PM EDT
In force
117 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon

Counties Bulloch County, GA, Evans County, GA, Screven County, GA

The radar

The Charleston,SC radar (KCLX), 70 km from the middle of the area, began a volume at 21:35 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, 9.6 hours before the alert went out and 215 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-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2021-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 879 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2021-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -54 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
879 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
630 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-54 m²/s²
0-3 km storm-relative helicity
-19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 2:51 PM EDTAreal Flood AdvisoryCHSColleton, Dorchester54 min
Aug 6, 3:43 PM EDTAreal Flood AdvisoryCHSBeaufort, Colleton, Dorchester, Hampton, Jasper92 min
Aug 6, 6:29 PM EDTAreal Flood AdvisoryCHSAllendale2 hr

Nearby

Areal Flood Advisories in Georgia, 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.