Alert archive / South Carolina / Areal Flood Advisories in 2021
Areal Flood Advisory 3, NWS Columbia, SC
NWS Columbia, SC issued this areal flood advisory at Feb 11, 2021, 6:37 PM EST for Aiken County, South Carolina; Richmond County, Georgia. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Feb 11, 2021, 6:37 PM EST (23:37 UTC)
- Expired
- Feb 11, 2021, 8:45 PM EST
- In force
- 2 hr
- Issued by
- NWS Columbia, SC
- Area
- Storm-based polygon
Counties Richmond County, GA, Aiken County, SC
The radar
The Columbia radar (KCAE), 88 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 183 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
- 492 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Feb 11, 6:07 PM EST, 30 minutes earlier.
Area forecast discussion, Feb 11, 6:07 PM EST, 30 minutes before
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</html>Hazardous weather outlook, Feb 11, 12:07 PM EST, 6 hours 30 minutes before
Hazardous Weather Outlook National Weather Service Columbia SC 1207 PM EST Thu Feb 11 2021 GAZ040-063>065-077-SCZ016-018-020>022-025>031-035>038-041-115-116- 121715- Lincoln-McDuffie-Columbia-Richmond-Burke-Chesterfield-McCormick- Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington-Richland-Lee- Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon-Bamberg- Northern Lancaster-Southern Lancaster- 1207 PM EST Thu Feb 11 2021 This Hazardous Weather Outlook is for the Midlands of South Carolina and the Central Savannah River area of Georgia. .DAY ONE...This afternoon and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Feb 11, 5:40 PM EST, 57 minutes before
Special Weather Statement
National Weather Service Columbia SC
540 PM EST Thu Feb 11 2021
GAZ063>065-112315-
Richmond GA-McDuffie GA-Columbia GA-
540 PM EST Thu Feb 11 2021
...Strong Thunderstorms Will Impact Portions of central Richmond...
southeastern McDuffie and southern Columbia Counties Until 615 PM
EST....
At 539 PM EST...National Weather Service doppler radar indicated a
strong thunderstorm over Harlem, or 7 miles southwest of Grovetown,
moving east at 30 mph.
HAZARD...gusty winds 40 to 50 mph.
IMPACT...expect minor damage to tree limbs and blowing around of
light, unsecured objects.
Some locations in the path of this storm include...
North Augusta, Grovetown, Evans, Martinez, Fort Gordon, Augusta,
Harlem, Glendale, South Augusta, Midtown, Summerville, Augusta Mall,
Daniel Field, Augusta Regional Airport, Village Plaza Shopping
Center, Augusta National Golf Club, Blythe, Dearing, West End Augusta
and New Savannah Bluff Lock & Dam Park.
This includes the following highways...
Interstate 20 in Georgia between mile markers 183 and 201.
Interstate 520 in Georgia between mile markers 1 and 13.
LAT...LON 3360 8211 3358 8209 3356 8205 3351 8199
3349 8199 3348 8196 3341 8193 3341 8194
3337 8193 3329 8231 3331 8234 3331 8238
3344 8244
TIME...MOT...LOC 2239Z 248DEG 25KT 3339 8232The office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 3:18 AM EST | Dense Fog Advisory | CAE | Aiken, Barnwell, Edgefield, Fairfield, Kershaw, Lancaster and 3 more | 8 hr |
| Feb 11, 5:40 PM EST | Special Weather Statement | CAE | Richmond | 35 min |
Nearby
Areal Flood Advisories in South Carolina, 2021Areal Flood Advisories in Georgia, 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.