Alert archive / South Carolina / Frost Advisories in 2021
Frost Advisory 8, NWS Columbia, SC
NWS Columbia, SC issued this frost advisory at Nov 19, 2021, 3:39 AM EST for 4 counties in Georgia; 9 counties in South Carolina. It took effect at Nov 20, 2021, 3:00 AM EST. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Nov 19, 2021, 3:39 AM EST (08:39 UTC)
- In effect from
- Nov 20, 2021, 3:00 AM EST
- Expired
- Nov 20, 2021, 8:00 AM EST
- In force
- 5 hr
- Issued by
- NWS Columbia, SC
Counties Burke County, GA, Columbia County, GA, McDuffie County, GA, Richmond County, GA, Aiken County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Clarendon County, SC, Lexington County, SC, Orangeburg County, SC, Richland County, SC, Sumter County, SC
The radar
The Columbia radar (KCAE), 49 km from the middle of the area, began a volume at 08:36 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, 8.7 hours before the alert went out and 143 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
- 211 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 946 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
As transmitted.
294 WWUS72 KCAE 190839 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 339 AM EST Fri Nov 19 2021 SCZ031-037-038-137-191730- /O.NEW.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ /O.CON.KCAE.LW.Y.0011.211119T1100Z-211119T1700Z/ Sumter-Calhoun-Clarendon-Southeastern Orangeburg- Including the cities of Sumter, St. Matthews, Manning, Summerton, and Holly Hill 339 AM EST Fri Nov 19 2021 ...LAKE WIND ADVISORY REMAINS IN EFFECT FROM 6 AM THIS MORNING TO NOON EST TODAY... ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EST SATURDAY... * WHAT...For the Frost Advisory, temperatures as low as 32 will result in frost formation. For the Lake Wind Advisory, northeast winds 10 to 20 knots and gusts to around 25 knots are expected. * WHERE...Portions of central South Carolina, and particularly Lake Marion for the Lake Wind Advisory. * WHEN...For the Frost Advisory, from 3 AM to 8 AM EST Saturday. For the Lake Wind Advisory, from 6 AM this morning to noon EST today. * 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. && $$ GAZ065-077-SCZ027-028-030-035-041-135-136-191730- /O.NEW.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ Richmond-Burke-Lexington-Richland-Aiken-Barnwell-Bamberg- Northwestern Orangeburg-Central Orangeburg- Including the cities of Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Barnwell, Williston, Blackville, Bamberg, Denmark, North, and Orangeburg 339 AM EST Fri Nov 19 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EST SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...From 3 AM to 8 AM EST Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
4 follow-up statements
526 WWUS72 KCAE 191554 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 1054 AM EST Fri Nov 19 2021 SCZ031-037-038-137-200000- /O.CAN.KCAE.LW.Y.0011.000000T0000Z-211119T1700Z/ /O.CON.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ Sumter-Calhoun-Clarendon-Southeastern Orangeburg- Including the cities of Sumter, St. Matthews, Manning, Summerton, and Holly Hill 1054 AM EST Fri Nov 19 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM EST SATURDAY... ...LAKE WIND ADVISORY IS CANCELLED... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central South Carolina. * WHEN...From 3 AM to 8 AM EST Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ GAZ065-077-SCZ027-028-030-035-041-135-136-200000- /O.CON.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ Richmond-Burke-Lexington-Richland-Aiken-Barnwell-Bamberg- Northwestern Orangeburg-Central Orangeburg- Including the cities of Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Barnwell, Williston, Blackville, Bamberg, Denmark, North, and Orangeburg 1054 AM EST Fri Nov 19 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM EST SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...From 3 AM to 8 AM EST Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
801 WWUS72 KCAE 191735 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 1235 PM EST Fri Nov 19 2021 GAZ063-064-201200- /O.EXA.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ McDuffie-Columbia- Including the cities of Thomson, Martinez, and Evans 1235 PM EST Fri Nov 19 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EST SATURDAY... * WHAT...Temperatures in the mid-30s will result in frost formation. * WHERE...McDuffie and Columbia Counties. * WHEN...From 3 AM to 8 AM EST Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ GAZ065-077-SCZ027-028-030-031-035-037-038-041-135>137-201200- /O.CON.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ Richmond-Burke-Lexington-Richland-Aiken-Sumter-Barnwell-Calhoun- Clarendon-Bamberg-Northwestern Orangeburg-Central Orangeburg- Southeastern Orangeburg- Including the cities of Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, North, Orangeburg, and Holly Hill 1235 PM EST Fri Nov 19 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM EST SATURDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...From 3 AM to 8 AM EST Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$
312 WWUS72 KCAE 200644 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 144 AM EST Sat Nov 20 2021 GAZ063>065-077-SCZ027-028-030-031-035-037-038-041-135>137-201300- /O.CON.KCAE.FR.Y.0008.211120T0800Z-211120T1300Z/ McDuffie-Columbia-Richmond-Burke-Lexington-Richland-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, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, North, Orangeburg, and Holly Hill 144 AM EST Sat Nov 20 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EST THIS MORNING... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central South Carolina and east central Georgia. * WHEN...From 3 AM to 8 AM EST 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. && $$
659 WWUS72 KCAE 201248 NPWCAE URGENT - WEATHER MESSAGE National Weather Service Columbia SC 748 AM EST Sat Nov 20 2021 GAZ063>065-077-SCZ027-028-030-031-035-037-038-041-135>137-201400- /O.EXP.KCAE.FR.Y.0008.000000T0000Z-211120T1300Z/ McDuffie-Columbia-Richmond-Burke-Lexington-Richland-Aiken-Sumter- Barnwell-Calhoun-Clarendon-Bamberg-Northwestern Orangeburg- Central Orangeburg-Southeastern Orangeburg- Including the cities of Thomson, Martinez, Evans, Augusta, Hephzibah, Waynesboro, Seven Oaks, West Columbia, Cayce, Lexington, Red Bank, Oak Grove, Columbia, Aiken, North Augusta, Sumter, Barnwell, Williston, Blackville, St. Matthews, Manning, Summerton, Bamberg, Denmark, North, Orangeburg, and Holly Hill 748 AM EST Sat Nov 20 2021 ...FROST ADVISORY WILL EXPIRE AT 8 AM EST THIS MORNING... Temperatures have warmed after sunrise and frost is no longer expected. The frost advisory will be allowed to expire at 8 AM. $$
The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 19, 12:52 AM EST | Lake Wind Advisory | CAE | Calhoun, Clarendon, Orangeburg, Sumter | 10 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.