Alert archive / South Carolina / Dense Fog Advisories in 2021
Dense Fog Advisory 21, NWS Columbia, SC
NWS Columbia, SC issued this dense fog advisory at Dec 27, 2021, 3:29 AM EST for 16 counties in South Carolina; 5 counties in Georgia. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Dec 27, 2021, 3:29 AM EST (08:29 UTC)
- Expired
- Dec 27, 2021, 10:57 AM EST
- In force
- 7 hr
- Issued by
- NWS Columbia, SC
All 21 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, Calhoun County, SC, Clarendon County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Lexington County, SC, McCormick County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC
The radar
The Columbia radar (KCAE), 34 km from the middle of the area, began a volume at 08:27 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, 8.5 hours before the alert went out and 164 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
- 1 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1427 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
783 WWUS72 KCAE 270829 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 329 AM EST Mon Dec 27 2021 GAZ040-063>065-077-SCZ018-025-026-030-035-041-135>137-271500- /O.NEW.KCAE.FG.Y.0021.211227T0829Z-211227T1500Z/ Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Edgefield- Saluda-Aiken-Barnwell-Bamberg-Northwestern Orangeburg- Central Orangeburg-Southeastern Orangeburg- Including the cities of Lincolnton, Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Mccormick, Edgefield, Johnston, Saluda, Ridge Spring, Aiken, North Augusta, Barnwell, Williston, Blackville, Bamberg, Denmark, North, Orangeburg, and Holly Hill 329 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until 10 AM EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
5 follow-up statements
911 WWUS72 KCAE 271102 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 602 AM EST Mon Dec 27 2021 SCZ020-027-028-037-271500- /O.EXA.KCAE.FG.Y.0021.000000T0000Z-211227T1500Z/ Newberry-Lexington-Richland-Calhoun- Including the cities of Newberry, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, and St. Matthews 602 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina. * WHEN...Until 10 AM EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ GAZ040-063>065-077-SCZ018-025-026-030-035-041-135>137-271500- /O.CON.KCAE.FG.Y.0021.000000T0000Z-211227T1500Z/ Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Edgefield- Saluda-Aiken-Barnwell-Bamberg-Northwestern Orangeburg- Central Orangeburg-Southeastern Orangeburg- Including the cities of Lincolnton, Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Mccormick, Edgefield, Johnston, Saluda, Ridge Spring, Aiken, North Augusta, Barnwell, Williston, Blackville, Bamberg, Denmark, North, Orangeburg, and Holly Hill 602 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM EST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until 10 AM EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
767 WWUS72 KCAE 271249 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 749 AM EST Mon Dec 27 2021 SCZ021-022-031-038-271500- /O.EXA.KCAE.FG.Y.0021.000000T0000Z-211227T1500Z/ Fairfield-Kershaw-Sumter-Clarendon- Including the cities of Winnsboro, Winnsboro Mills, Camden, Lugoff, Sumter, Manning, and Summerton 749 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina. * WHEN...Until 10 AM EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ GAZ040-063>065-077-SCZ018-020-025>028-030-035-037-041-135>137- 271500- /O.CON.KCAE.FG.Y.0021.000000T0000Z-211227T1500Z/ Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Newberry- Edgefield-Saluda-Lexington-Richland-Aiken-Barnwell-Calhoun- Bamberg-Northwestern Orangeburg-Central Orangeburg- Southeastern Orangeburg- Including the cities of Lincolnton, Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Mccormick, Newberry, Edgefield, Johnston, Saluda, Ridge Spring, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Barnwell, Williston, Blackville, St. Matthews, Bamberg, Denmark, North, Orangeburg, and Holly Hill 749 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 10 AM EST THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until 10 AM EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
963 WWUS72 KCAE 271354 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 854 AM EST Mon Dec 27 2021 SCZ115-116-271700- /O.EXB.KCAE.FG.Y.0021.000000T0000Z-211227T1700Z/ Northern Lancaster-Southern Lancaster- Including the cities of Indian Land, Lancaster, Elgin, and Lancaster Mill 854 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON EST TODAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until NOON EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ GAZ040-063>065-077-SCZ018-020>022-025>028-030-031-035-037-038-041- 135>137-271700- /O.EXT.KCAE.FG.Y.0021.000000T0000Z-211227T1700Z/ Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Newberry- Fairfield-Kershaw-Edgefield-Saluda-Lexington-Richland-Aiken- Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northwestern Orangeburg- Central Orangeburg-Southeastern Orangeburg- Including the cities of Lincolnton, Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, North, Orangeburg, and Holly Hill 854 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL NOON EST TODAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until NOON EST this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
343 WWUS72 KCAE 271401 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 901 AM EST Mon Dec 27 2021 GAZ040-063>065-077-SCZ018-020>022-025>028-030-031-035-037-038-041- 115-116-135>137-271700- /O.CON.KCAE.FG.Y.0021.000000T0000Z-211227T1700Z/ Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Newberry- Fairfield-Kershaw-Edgefield-Saluda-Lexington-Richland-Aiken- Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northern Lancaster- Southern Lancaster-Northwestern Orangeburg-Central Orangeburg- Southeastern Orangeburg- Including the cities of Lincolnton, Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, Indian Land, Lancaster, Elgin, Lancaster Mill, North, Orangeburg, and Holly Hill 901 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON EST TODAY... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until NOON EST this afternoon. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$
381 WWUS72 KCAE 271557 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 1057 AM EST Mon Dec 27 2021 GAZ040-063>065-077-SCZ018-020>022-025>028-030-031-035-037-038-041- 115-116-135>137-271700- /O.CAN.KCAE.FG.Y.0021.000000T0000Z-211227T1700Z/ Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Newberry- Fairfield-Kershaw-Edgefield-Saluda-Lexington-Richland-Aiken- Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northern Lancaster- Southern Lancaster-Northwestern Orangeburg-Central Orangeburg- Southeastern Orangeburg- Including the cities of Lincolnton, Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, Indian Land, Lancaster, Elgin, Lancaster Mill, North, Orangeburg, and Holly Hill 1057 AM EST Mon Dec 27 2021 ...DENSE FOG ADVISORY IS CANCELLED... Conditions have quickly improved across much of the forecast area during the last hour. Therefore, a Dense Fog Advisory is no longer needed. Any lingering patchy fog should dissipate by Noon. $$
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.