Alert archive / South Carolina / Dense Fog Advisories in 2020
Dense Fog Advisory 21, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this dense fog advisory at Nov 29, 2020, 1:30 AM EST for 7 counties in South Carolina; Elbert County, Franklin County, Hart County, Georgia. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Nov 29, 2020, 1:30 AM EST (06:30 UTC)
- Expired
- Nov 29, 2020, 6:46 AM EST
- In force
- 5 hr
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Elbert County, GA, Franklin County, GA, Hart County, GA, Abbeville County, SC, Anderson County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC
The radar
The Greer radar (KGSP), 47 km from the middle of the area, began a volume at 06:35 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 6.5 hours before the alert went out and 277 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
- 2027 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 28 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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this dense fog advisory went out at Nov 29, 12:55 AM EST, 35 minutes earlier.
Area forecast discussion, Nov 29, 12:55 AM EST, 35 minutes before
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</html>The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 2:57 PM EST | Winter Storm Watch | GSP | Avery, Graham, Haywood, Madison, Mitchell, Swain and 1 more | 13 hr |
Nearby
Dense Fog Advisories in South Carolina, 2020Dense Fog Advisories in Georgia, 2020Every dense fog advisory in 2020
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.