Alert archive / South Dakota / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS Aberdeen, SD

August 10, 2016Dewey County, Potter County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Aug 10, 2016, 7:30 PM MDT for Dewey County, Potter County, South Dakota. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 10, 2016, 7:30 PM MDT (01:30 UTC)
Expired: Aug 11, 2016, 1:30 AM MDT
In force: 6 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: None

Counties Dewey County, SD, Potter County, SD

The radar

The Aberdeen radar (KABR), 159 km from the middle of the area, began a volume at 01:29 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

Aberdeen, SD (KABR), launched 00:00Z, 1.5 hours before the alert went out and 156 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: 984 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 1716 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 347 m²/s²
0-3 km storm-relative helicity: 497 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

As transmitted.

457 
WGUS53 KABR 110130
FFWABR
SDC041-107-110730-
/O.NEW.KABR.FF.W.0004.160811T0130Z-160811T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
830 PM CDT WED AUG 10 2016

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL DEWEY COUNTY IN NORTH CENTRAL SOUTH DAKOTA...
  SOUTHWESTERN POTTER COUNTY IN NORTH CENTRAL SOUTH DAKOTA...

* UNTIL 230 AM CDT THURSDAY/130 AM MDT THURSDAY/

* AT 829 PM CDT/729 PM MDT/...DOPPLER RADAR INDICATED THUNDERSTORMS
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING MAY
  BE ONGOING OR IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SWIFTBIRD...WHITLOCKS BAY REC AREA...LAKE OAHE AND SWIFTBIRD DAY
  SCHOOL.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4518 10029 4491 10009 4491 10063 4513 10052

$$

PARKIN

1 follow-up statement

862 
WGUS73 KABR 110727
FFSABR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
227 AM CDT THU AUG 11 2016

SDC041-107-110736-
/O.EXP.KABR.FF.W.0004.000000T0000Z-160811T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DEWEY SD-POTTER SD-
227 AM CDT THU AUG 11 2016

...THE FLASH FLOOD WARNING FOR EAST CENTRAL DEWEY AND SOUTHWESTERN
POTTER COUNTIES WILL EXPIRE AT 230 AM CDT/130 AM MDT/...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4518 10029 4491 10009 4491 10063 4513 10052

$$

SERR

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 10, 6:03 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	42 min
Aug 10, 6:11 PM MDT	Severe Thunderstorm Warning	ABR	Hughes, Jones, Stanley	39 min
Aug 10, 6:14 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Edmunds, McPherson, Walworth	33 min
Aug 10, 6:26 PM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey, Walworth	34 min
Aug 10, 6:27 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Sully	35 min
Aug 10, 6:41 PM MDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, McPherson, Walworth	26 min
Aug 10, 7:05 PM MDT	Severe Thunderstorm Warning	ABR	Potter	18 min
Aug 10, 7:10 PM MDT	Severe Thunderstorm Warning	ABR	Hughes, Jones, Lyman, Stanley	35 min
Aug 10, 7:22 PM MDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	24 min
Aug 10, 7:32 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Walworth	28 min
Aug 10, 7:53 PM MDT	Tornado Warning	ABR	Potter	24 min
Aug 10, 7:58 PM MDT	Severe Thunderstorm Warning	ABR	Potter, Walworth	20 min
Aug 10, 8:02 PM MDT	Severe Thunderstorm Warning	ABR	Hughes, Jones, Lyman, Stanley, Sully	43 min
Aug 10, 8:22 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	38 min
Aug 10, 8:36 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds	39 min
Aug 10, 8:57 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Spink	33 min
Aug 10, 9:14 PM MDT	Severe Thunderstorm Warning	ABR	Brown, Day, Spink	46 min
Aug 10, 9:28 PM MDT	Severe Thunderstorm Warning	ABR	Clark, Day, Spink	24 min
Aug 10, 9:54 PM MDT	Special Weather Statement	ABR	Clark, Day	51 min
Aug 10, 10:29 PM MDT	Areal Flood Warning	ABR	Day, Roberts	9 hr
Aug 10, 10:33 PM MDT	Special Weather Statement	ABR	Clark, Spink	42 min
Aug 10, 11:02 PM MDT	Severe Thunderstorm Warning	ABR	Clark, Hamlin	43 min
Aug 10, 11:41 PM MDT	Special Weather Statement	ABR	Deuel, Hamlin	49 min
Aug 11, 5:28 PM MDT	Severe Thunderstorm Warning	ABR	Stanley	47 min

Nearby

Flash Flood Warnings in South Dakota, 2016 Every flash flood warning in 2016

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.