Alert archive / South Carolina / Dense Fog Advisories in 2021
Dense Fog Advisory 22, NWS Columbia, SC
NWS Columbia, SC issued this dense fog advisory at Dec 31, 2021, 6:51 AM EST for 6 counties in South Carolina; 5 counties in Georgia. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Dec 31, 2021, 6:51 AM EST (11:51 UTC)
- Expired
- Dec 31, 2021, 9:00 AM EST
- In force
- 2 hr
- Issued by
- NWS Columbia, SC
Counties Burke County, GA, Columbia County, GA, Lincoln County, GA, McDuffie County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Edgefield County, SC, McCormick County, SC, Orangeburg County, SC
The radar
The Columbia radar (KCAE), 86 km from the middle of the area, began a volume at 11:52 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, 11.9 hours before the alert went out and 185 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
- 142 J/kg
- Mixed-layer CIN
- -204 J/kg
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -129 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.5
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 Columbia, SC wrote its last area forecast discussion before this dense fog advisory went out at Dec 30, 6:08 PM EST, 12 hours 43 minutes earlier.
Area forecast discussion, Dec 30, 6:08 PM EST, 12 hours 43 minutes before
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</html>Hazardous weather outlook, Dec 30, 6:00 PM EST, 12 hours 51 minutes before
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</html>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.