Alert archive / South Carolina / Areal Flood Advisories in 2021
Areal Flood Advisory 59, NWS Columbia, SC
NWS Columbia, SC issued this areal flood advisory at Aug 16, 2021, 2:43 PM EDT for Calhoun County, Lexington County, Richland County, South Carolina. It was in force for 62 min.
The area
The counties it named.
The facts
- Issued
- Aug 16, 2021, 2:43 PM EDT (18:43 UTC)
- Expired
- Aug 16, 2021, 3:45 PM EDT
- In force
- 62 min
- Issued by
- NWS Columbia, SC
- Area
- Storm-based polygon
Counties Calhoun County, SC, Lexington County, SC, Richland County, SC
The radar
The Columbia radar (KCAE), 15 km from the middle of the area, began a volume at 18:44 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, 6.7 hours before the alert went out and 141 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
- 1700 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 706 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
What forecasters said that day
The local office's own words before this areal flood 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 areal flood advisory went out at Aug 16, 2:12 PM EDT, 31 minutes earlier.
Area forecast discussion, Aug 16, 2:12 PM EDT, 31 minutes before
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</html>Hazardous weather outlook, Aug 16, 4:26 AM EDT, 10 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Columbia SC 426 AM EDT Mon Aug 16 2021 GAZ040-063>065-077-SCZ016-018-020>022-025>031-035-037-038-041-115- 116-135>137-170830- Lincoln-McDuffie-Columbia-Richmond-Burke-Chesterfield-McCormick- Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-Richland-Lee- Aiken-Sumter-Barnwell-Calhoun-Clarendon-Bamberg-Northern Lancaster- Southern Lancaster-Northwestern Orangeburg-Central Orangeburg- Southeastern Orangeburg- 426 AM EDT Mon Aug 16 2021 This Hazardous Weather Outlook is for the Midlands of South Carolina and the Central Savannah River area of Georgia. .DAY ONE...Today and tonight. Periods of heavy rainfall may be possible once again this afternoon due to slow moving showers and thunderstorms. Depending on how heavy the rainfall is, there may be some localized flooding of small streams and low-lying areas. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Periods of heavy rain will be possible Tuesday through Wednesday. This is in association with remnant surface boundaries and moisture associated with the remnants of Fred as it slowly moves off to the west of the area through the middle of the week. Localized flooding will continue to be possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Aug 16, 1:20 PM EDT, 1 hour 23 minutes before
Special Weather Statement
National Weather Service Columbia SC
120 PM EDT Mon Aug 16 2021
SCZ028-031-037-038-135>137-161800-
Central Orangeburg SC-Southeastern Orangeburg SC-Calhoun SC-
Clarendon SC-Richland SC-Sumter SC-Northwestern Orangeburg SC-
120 PM EDT Mon Aug 16 2021
...Strong thunderstorms will impact portions of southeastern Calhoun,
southwestern Clarendon, southwestern Sumter, central Orangeburg and
southeastern Richland Counties through 200 PM EDT...
At 119 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Summerton to near Bowman. Movement was
northwest at 35 mph.
...Boaters on Lake Marion Should Seek Safe Harbor...
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Orangeburg, Brookdale, St. Matthews, Summerton, Bowman, Elloree,
Santee State Park, Claflin College, South Carolina State University,
Orangeburg County Airport, Edisto Gardens, Santee, Pinewood, Cameron,
Vance, Cordova, Poplar Creek Landing, Rimini, Fort Motte and
Stumphole Landing.
This includes the following highways...
Interstate 26 between mile markers 142 and 169.
Interstate 95 between mile markers 85 and 116.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If on or near Lake Marion, get out of the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
Persons in campgrounds should consider seeking sturdy shelter until
these storms pass.
&&
LAT...LON 3333 8049 3333 8051 3330 8057 3346 8101
3384 8065 3366 8024
TIME...MOT...LOC 1719Z 116DEG 30KT 3364 8030 3331 8059
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
LCVSpecial weather statement, Aug 16, 1:30 PM EDT, 1 hour 13 minutes before
Special Weather Statement
National Weather Service Columbia SC
130 PM EDT Mon Aug 16 2021
SCZ020-026>028-161830-
Lexington SC-Newberry SC-Richland SC-Saluda SC-
130 PM EDT Mon Aug 16 2021
...Strong thunderstorms will impact portions of southeastern
Newberry, northwestern Lexington, eastern Saluda and northwestern
Richland Counties through 230 PM EDT...
At 129 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Harbison State Forest to near
Batesburg-Leesville. Movement was northwest at 15 mph.
...Boaters on Lake Murray Should Seek Safe Harbor...
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Columbia, Lexington, Irmo, Batesburg-Leesville, St. Andrews, Highway
6 at Lake Murray Dam, Saluda, Columbia International University,
Harbison State Forest, Dreher Island State Park, Ballentine, Chapin,
Gilbert, Summit, Little Mountain, Peak, Cedar Grove Fire Station,
South Shore Marina, Oswald Park and Saluda Co Sheriff's Office.
This includes the following highways...
Interstate 126 near mile marker 0.
Interstate 20 in South Carolina near mile marker 49, and between
mile markers 58 and 68.
Interstate 26 between mile markers 84 and 107.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3429 8134 3427 8134 3424 8131 3423 8128
3420 8125 3420 8122 3418 8118 3420 8117
3408 8101 3383 8148 3402 8183
TIME...MOT...LOC 1729Z 126DEG 15KT 3408 8114 3391 8146
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPHSpecial weather statement, Aug 16, 1:41 PM EDT, 1 hour 2 minutes before
Special Weather Statement
National Weather Service Columbia SC
141 PM EDT Mon Aug 16 2021
GAZ040-063>065-SCZ018-025-030-161815-
Richmond GA-McDuffie GA-Lincoln GA-Columbia GA-Aiken SC-McCormick SC-
Edgefield SC-
141 PM EDT Mon Aug 16 2021
...A strong thunderstorm will impact portions of north central
McDuffie, Columbia, southeastern Lincoln, central Richmond,
southwestern Edgefield, west central Aiken and southeastern McCormick
Counties through 215 PM EDT...
At 140 PM EDT, Doppler radar was tracking a strong thunderstorm over
Augusta, moving northwest at 35 mph.
...Boaters on Lake Strom Thurmond Should Seek Safe Harbor...
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
North Augusta, Grovetown, Evans, Fort Gordon, Augusta, Clearwater,
Martinez, Belvedere, Hephzibah, Glendale, South Augusta, Clarks Hill
Recreation Area, Mistletoe State Park, Summerville, Augusta Mall,
Daniel Field, Village Plaza Shopping Center, Augusta National Golf
Club, J. Strom Thurmond Dam and Appling.
This includes the following highways...
Interstate 20 in Georgia between mile markers 182 and 201.
Interstate 20 in South Carolina between mile markers 0 and 9.
Interstate 520 in Georgia between mile markers 1 and 9.
Interstate 520 in South Carolina between mile markers 17 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
If on or near Lake Thurmond, get out of the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 3393 8224 3356 8183 3332 8208 3362 8252
TIME...MOT...LOC 1740Z 142DEG 30KT 3348 8197
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
LCVThe office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 1:20 PM EDT | Special Weather Statement | CAE | Calhoun, Orangeburg | 40 min |
| Aug 16, 1:30 PM EDT | Special Weather Statement | CAE | Saluda | 60 min |
| Aug 16, 5:29 PM EDT | Areal Flood Advisory | CAE | Aiken, Barnwell, Edgefield, McCormick | 2 hr |
| Aug 16, 1:41 PM EDT | Special Weather Statement | CAE | Columbia, Richmond | 34 min |
Nearby
Areal Flood Advisories in South Carolina, 2021Every areal flood 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.