Alert archive / South Carolina / Flash Flood Warnings in 2015

Flash Flood Warning 39, NWS Columbia, SC

December 30, 2015Chesterfield County, South Carolina

NWS Columbia, SC issued this flash flood warning at Dec 30, 2015, 1:37 PM EST for Chesterfield County, South Carolina. It was in force for 4 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 30, 2015, 1:37 PM EST (18:37 UTC)
Expired: Dec 30, 2015, 5:30 PM EST
In force: 4 hr
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Flood severity: None

County Chesterfield County, SC

The radar

The Columbia radar (KCAE), 121 km from the middle of the area, began a volume at 18:37 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.

What was reported inside it

Time	Report	Where	Remark
Dec 30, 4:00 PM EST	FLASH FLOOD	1 Ssw Cheraw, SC	CHESTERFIELD CO. EM REPORTED A FEW ROADS CLOSED DUE TO FLASH FLOODING INCLUDING THE US 52 BYPASS IN CHERAW.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.6 hours before the alert went out and 158 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1236 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

486 
WGUS52 KCAE 301837
FFWCAE
SCC025-302230-
/O.NEW.KCAE.FF.W.0039.151230T1837Z-151230T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE COLUMBIA SC
137 PM EST WED DEC 30 2015

THE NATIONAL WEATHER SERVICE IN COLUMBIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHESTERFIELD COUNTY IN CENTRAL SOUTH CAROLINA...

* UNTIL 530 PM EST
    
* AT 137 PM EST...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CHERAW...PAGELAND...CHESTERFIELD...JEFFERSON...RUBY...PATRICK...
  MOUNT CROGHAN AND MCFARLAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

REPORT LARGE HAIL...DAMAGING WINDS OR FLOODING TO YOUR COUNTY
SHERIFF...ALSO USE WWW.FACEBOOK.COM/NWSCOLUMBIA AND EMAIL
CAEWX@NOAA.GOV TO RELAY SEVERE WEATHER REPORTS.
&&

LAT...LON 3460 7981 3457 7982 3451 8033 3459 8038
      3464 8043 3466 8043 3469 8047 3477 8052
      3479 8055 3482 8056 3481 7994 3476 7993
      3474 7989 3468 7986 3465 7980 3461 7978

$$
MANNING

The office that day

Everything else NWS Columbia, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 30, 9:04 AM EST	Areal Flood Advisory	CAE	McCormick	116 min
Dec 30, 10:33 AM EST	Flash Flood Warning	CAE	McCormick	4 hr
Dec 30, 10:57 AM EST	Special Weather Statement	CAE	Newberry	48 min
Dec 30, 11:09 AM EST	Flash Flood Warning	CAE	Newberry	4 hr
Dec 30, 11:43 AM EST	Flash Flood Warning	CAE	Fairfield, Lancaster	6 hr
Dec 30, 12:30 PM EST	Severe Thunderstorm Warning	CAE	Lancaster	45 min
Dec 30, 12:52 PM EST	Special Weather Statement	CAE	Kershaw	23 min
Dec 30, 1:05 PM EST	Severe Thunderstorm Warning	CAE	Chesterfield	40 min
Dec 30, 1:13 PM EST	Severe Thunderstorm Warning	CAE	Lancaster	32 min
Dec 30, 1:45 PM EST	Severe Thunderstorm Warning	CAE	Chesterfield	60 min
Dec 30, 2:02 PM EST	River Flood Warning	CAE	Lexington, Richland	4 days
Dec 30, 2:02 PM EST	River Flood Warning	CAE	Chesterfield, Marlboro	4 days
Dec 30, 2:02 PM EST	River Flood Warning	CAE	Newberry, Union	63 hr
Dec 30, 2:25 PM EST	Areal Flood Advisory	CAE	McCormick	4 hr
Dec 30, 3:09 PM EST	Areal Flood Warning	CAE	Newberry	3 hr
Dec 30, 3:53 PM EST	Areal Flood Advisory	CAE	Aiken, Calhoun, Fairfield, Kershaw, Lexington, Richland	2 hr
Dec 30, 4:07 PM EST	Areal Flood Advisory	CAE	Aiken, Edgefield, Lexington, McCormick, Newberry, Saluda	113 min
Dec 30, 4:56 PM EST	Special Weather Statement	CAE	Lexington	49 min
Dec 30, 5:53 PM EST	Areal Flood Advisory	CAE	Aiken, Bamberg, Barnwell, Calhoun, Chesterfield, Clarendon and 12 more	3 hr

Nearby

Flash Flood Warnings in South Carolina, 2015 Every flash flood warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.