Alert archive / Georgia / Flash Flood Warnings in 2017

Flash Flood Warning 22, NWS Atlanta, GA

June 7, 2017Sumter County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jun 7, 2017, 2:04 AM EDT for Sumter County, Georgia. It was in force for 6 hr. 7 reports 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
Jun 7, 2017, 2:04 AM EDT (06:04 UTC)
Expired
Jun 7, 2017, 8:00 AM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

County Sumter County, GA

The radar

The Robins AFB radar (KJGX), 118 km from the middle of the area, began a volume at 06:03 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

TimeReportWhereRemark
Jun 7, 2:30 AM EDTFLASH FLOOD2 Sse Sumter, GAROADWAY AND DRIVEWAY WASHED OUT ON BEAUCHAMP ROAD
Jun 7, 2:30 AM EDTFLASH FLOOD2 Wsw Sumter, GADRIVEWAY WASHED OUT ON WIGGINS ROAD
Jun 7, 2:30 AM EDTFLASH FLOOD4 Sw Huntington, GASTANDING WATER ON THE ROAD ON SAM HILL DOGLEG ROAD -- CAUTIOUSLY PASSABLE
Jun 7, 2:30 AM EDTFLASH FLOOD4 Wsw Leslie, GARW JONES ROAD HAD WATER ON THE ROAD FOR ABOUT THREE HOURS -- WATER HAS RECEDED INTO DITCHES
Jun 7, 5:00 AM EDTFLASH FLOOD3 Sw Leslie, GAWATER ON THE ROAD ON BRADY ROAD -- ROAD CLOSED
Jun 7, 5:00 AM EDTFLASH FLOOD3 Sw Leslie, GAWATER OVER THE ROAD ON COUNTY LINE SNEED ROAD -- ROAD CLOSED
Jun 7, 5:30 AM EDTFLASH FLOOD3 Nw Cobb, GACOBB-CHEEK ROAD WASHED OUT AT THE DRAINAGE STRUCTURE ON THE DIRT SECTION OF ROAD.

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

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 6.1 hours before the alert went out and 161 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2017-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 86 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2017-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -101 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
86 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
971 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
-101 m²/s²
0-3 km storm-relative helicity
-17 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-1.4

Open this sounding in Storm Lab

The text

As transmitted.

443 
WGUS52 KFFC 070604
FFWFFC
GAC261-071200-
/O.NEW.KFFC.FF.W.0022.170607T0604Z-170607T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Peachtree City GA
204 AM EDT WED JUN 7 2017

The National Weather Service in Peachtree City has issued a

* Flash Flood Warning for...
  Southern Sumter County in west central Georgia...

* Until 800 AM EDT

* At 202 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Sumter, Maddox, Croxton Crossroads and Huntington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

If you see significant flooding call the National Weather Service
toll free at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at
NWSATLANTA.

&&

LAT...LON 3187 8434 3194 8437 3204 8436 3204 8401
      3191 8401 3192 8434

$$
1 follow-up statement
908 
WGUS72 KFFC 070952
FFSFFC

Flash Flood Statement
National Weather Service Peachtree City GA
552 AM EDT WED JUN 7 2017

GAC261-071001-
/O.CAN.KFFC.FF.W.0022.000000T0000Z-170607T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sumter GA-
552 AM EDT WED JUN 7 2017

...THE FLASH FLOOD WARNING FOR SOUTHERN SUMTER COUNTY IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3187 8434 3194 8437 3204 8436 3204 8401
      3191 8401 3192 8434

$$

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 6, 10:32 PM EDTSpecial Weather StatementFFCStewart28 min
Jun 6, 11:14 PM EDTSpecial Weather StatementFFCStewart31 min
Jun 7, 1:23 AM EDTSpecial Weather StatementFFCHall52 min
Jun 7, 1:25 AM EDTSpecial Weather StatementFFCSumter35 min
Jun 7, 3:52 AM EDTSpecial Weather StatementFFCCrisp38 min
Jun 7, 10:10 AM EDTRiver Flood WarningFFCFloyd24 hr

Nearby

Flash Flood Warnings in Georgia, 2017Every flash flood warning in 2017

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.