Alert archive / South Carolina / Dense Fog Advisories in 2021
Dense Fog Advisory 2, NWS Charleston, SC
NWS Charleston, SC issued this dense fog advisory at Jan 15, 2021, 8:35 PM EST for Allendale County, Colleton County, Hampton County, South Carolina; Bulloch County, Effingham County, Screven County, Georgia. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jan 15, 2021, 8:35 PM EST (01:35 UTC)
- Expired
- Jan 15, 2021, 11:16 PM EST
- In force
- 3 hr
- Issued by
- NWS Charleston, SC
Counties Bulloch County, GA, Effingham County, GA, Screven County, GA, Allendale County, SC, Colleton County, SC, Hampton County, SC
The radar
The Charleston,SC radar (KCLX), 25 km from the middle of the area, began a volume at 01:38 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, 1.6 hours before the alert went out and 124 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 816 m above ground
- 0-6 km bulk shear
- 100 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 221 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this dense fog 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 dense fog advisory went out at Jan 15, 6:10 PM EST, 2 hours 25 minutes earlier.
Area forecast discussion, Jan 15, 6:10 PM EST, 2 hours 25 minutes before
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</html>Hazardous weather outlook, Jan 15, 5:03 PM EST, 3 hours 32 minutes before
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Special weather statement, Jan 15, 6:50 PM EST, 1 hour 45 minutes before
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</html>Special weather statement, Jan 15, 7:18 PM EST, 1 hour 17 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 |
|---|---|---|---|---|
| Jan 16, 3:39 AM EST | Gale Warning | CHS | 14 hr |
Nearby
Dense Fog Advisories in South Carolina, 2021Dense Fog Advisories in Georgia, 2021Every dense fog 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.