Alert archive / South Carolina / Frost Advisories in 2021
Frost Advisory 2, NWS Columbia, SC
NWS Columbia, SC issued this frost advisory at Apr 21, 2021, 2:25 PM EDT for Lincoln County, Georgia; 8 counties in South Carolina. It took effect at Apr 22, 2021, 4:00 AM EDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2021, 2:25 PM EDT (18:25 UTC)
- In effect from
- Apr 22, 2021, 4:00 AM EDT
- Expired
- Apr 22, 2021, 8:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Columbia, SC
Counties Lincoln County, GA, Chesterfield County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, McCormick County, SC, Newberry County, SC, Saluda County, SC
The radar
The Columbia radar (KCAE), 39 km from the middle of the area, began a volume at 18:29 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 12:00Z, 6.4 hours before the alert went out and 195 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
- 67 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1235 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
138 WWUS72 KCAE 211825 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 225 PM EDT Wed Apr 21 2021 GAZ040-SCZ016-018-020>022-025-026-115-116-220900- /O.NEW.KCAE.FR.Y.0002.210422T0800Z-210422T1200Z/ /O.CON.KCAE.LW.Y.0004.000000T0000Z-210422T0900Z/ Lincoln-Chesterfield-McCormick-Newberry-Fairfield-Kershaw- Edgefield-Saluda-Northern Lancaster-Southern Lancaster- Including the cities of Lincolnton, Cheraw, Pageland, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Indian Land, Lancaster, Elgin, and Lancaster Mill 225 PM EDT Wed Apr 21 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT THURSDAY... ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * WHAT...For the Frost Advisory, temperatures between 33 and 36 degrees may result in frost formation. For the Lake Wind Advisory, northwest winds 15 to 20 knots with gusts around 30 knots. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...For the Frost Advisory, from 4 AM to 8 AM EDT Thursday. For the Lake Wind Advisory, until 5 AM EDT Thursday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. Take steps now to protect tender plants from the cold. && $$ GAZ063>065-077-SCZ027>031-035-037-038-041-135>137-220900- /O.CON.KCAE.LW.Y.0004.000000T0000Z-210422T0900Z/ McDuffie-Columbia-Richmond-Burke-Lexington-Richland-Lee-Aiken- Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northwestern Orangeburg- Central Orangeburg-Southeastern Orangeburg- Including the cities of Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Bishopville, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, North, Orangeburg, and Holly Hill 225 PM EDT Wed Apr 21 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT THURSDAY... * WHAT...Northwest winds 15 to 20 knots with gusts around 30 knots expected. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Through 5 AM EDT Thursday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. && $$
3 follow-up statements
693 WWUS72 KCAE 220137 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 937 PM EDT Wed Apr 21 2021 GAZ040-SCZ016-018-020>022-025-026-115-116-221200- /O.CON.KCAE.LW.Y.0004.000000T0000Z-210422T0900Z/ /O.CON.KCAE.FR.Y.0002.210422T0800Z-210422T1200Z/ Lincoln-Chesterfield-McCormick-Newberry-Fairfield-Kershaw- Edgefield-Saluda-Northern Lancaster-Southern Lancaster- Including the cities of Lincolnton, Cheraw, Pageland, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Indian Land, Lancaster, Elgin, and Lancaster Mill 937 PM EDT Wed Apr 21 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT THURSDAY... ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM EDT THURSDAY... * WHAT...For the Frost Advisory, temperatures between 33 and 36 degrees may result in frost formation. For the Lake Wind Advisory, northwest winds 15 to 20 knots with gusts around 25 knots. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...For the Frost Advisory, from 4 AM to 8 AM EDT Thursday. For the Lake Wind Advisory, until 5 AM EDT Thursday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. Take steps now to protect tender plants from the cold. && $$ GAZ063>065-077-SCZ027>031-035-037-038-041-135>137-220900- /O.CON.KCAE.LW.Y.0004.000000T0000Z-210422T0900Z/ McDuffie-Columbia-Richmond-Burke-Lexington-Richland-Lee-Aiken- Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northwestern Orangeburg- Central Orangeburg-Southeastern Orangeburg- Including the cities of Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Bishopville, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, North, Orangeburg, and Holly Hill 937 PM EDT Wed Apr 21 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT THURSDAY... * WHAT...Northwest winds 15 to 20 knots with gusts around 25 knots expected. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Through 5 AM EDT Thursday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. && $$
747 WWUS72 KCAE 220701 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 301 AM EDT Thu Apr 22 2021 GAZ040-SCZ016-018-020>022-025-026-115-116-221200- /O.CAN.KCAE.LW.Y.0004.000000T0000Z-210422T0900Z/ /O.CON.KCAE.FR.Y.0002.210422T0800Z-210422T1200Z/ Lincoln-Chesterfield-McCormick-Newberry-Fairfield-Kershaw- Edgefield-Saluda-Northern Lancaster-Southern Lancaster- Including the cities of Lincolnton, Cheraw, Pageland, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Indian Land, Lancaster, Elgin, and Lancaster Mill 301 AM EDT Thu Apr 22 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... ...LAKE WIND ADVISORY IS CANCELLED... * WHAT...For the Frost Advisory, temperatures between 33 and 36 degrees may result in frost formation. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until 8 AM EDT this morning. * IMPACTS... Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ GAZ063>065-077-SCZ027>031-035-041-135-136-220815- /O.CAN.KCAE.LW.Y.0004.000000T0000Z-210422T0900Z/ McDuffie-Columbia-Richmond-Burke-Lexington-Richland-Lee-Aiken- Sumter-Barnwell-Bamberg-Northwestern Orangeburg- Central Orangeburg- Including the cities of Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Bishopville, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, Bamberg, Denmark, North, and Orangeburg 301 AM EDT Thu Apr 22 2021 ...LAKE WIND ADVISORY IS CANCELLED... As high pressure settles into the region, winds have subsided enough to allow for the cancellation of the Lake Wind Advisory. $$ SCZ037-038-137-221200- /O.EXT.KCAE.LW.Y.0004.000000T0000Z-210422T1200Z/ Calhoun-Clarendon-Southeastern Orangeburg- Including the cities of St. Matthews, Manning, Summerton, and Holly Hill 301 AM EDT Thu Apr 22 2021 ...LAKE WIND ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Northwest winds 15 to 20 knots with gusts around 25 knots expected. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. && $$
542 WWUS72 KCAE 221202 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 802 AM EDT Thu Apr 22 2021 GAZ040-SCZ016-018-020>022-025-026-115-116-221315- /O.EXP.KCAE.FR.Y.0002.000000T0000Z-210422T1200Z/ Lincoln-Chesterfield-McCormick-Newberry-Fairfield-Kershaw- Edgefield-Saluda-Northern Lancaster-Southern Lancaster- Including the cities of Lincolnton, Cheraw, Pageland, Mccormick, Newberry, Winnsboro, Winnsboro Mills, Camden, Lugoff, Edgefield, Johnston, Saluda, Ridge Spring, Indian Land, Lancaster, Elgin, and Lancaster Mill 802 AM EDT Thu Apr 22 2021 ...FROST ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Temperatures have begun rising with sunrise and the frost potential for this morning has ended.. $$ SCZ037-038-137-221315- /O.EXP.KCAE.LW.Y.0004.000000T0000Z-210422T1200Z/ Calhoun-Clarendon-Southeastern Orangeburg- Including the cities of St. Matthews, Manning, Summerton, and Holly Hill 802 AM EDT Thu Apr 22 2021 ...LAKE WIND ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Winds continue to subside and have fallen below lake wind advisory criteria. $$
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 1:17 AM EDT | Lake Wind Advisory | CAE | Burke, Columbia, Lincoln, McDuffie, Richmond | 31 hr |
| Apr 21, 1:37 AM EDT | Red Flag Warning | CAE | Burke, Columbia, Lincoln, McDuffie, Richmond | 18 hr |
Nearby
Frost Advisories in South Carolina, 2021Frost Advisories in Georgia, 2021Every frost 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.