Alert archive / South Dakota / Flash Flood Warnings in 2016

Flash Flood Warning 7, NWS Aberdeen, SD

December 25, 2016Brown County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Dec 25, 2016, 6:13 PM CST for Brown 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: Dec 25, 2016, 6:13 PM CST (00:13 UTC)
Expired: Dec 26, 2016, 12:15 AM CST
In force: 6 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: None

County Brown County, SD

The radar

The Aberdeen radar (KABR), 25 km from the middle of the area, began a volume at 00:16 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, 0.2 hours before the alert went out and 85 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: 514 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 574 m²/s²
0-3 km storm-relative helicity: 366 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

507 
WGUS53 KABR 260013
FFWABR
SDC013-260615-
/O.NEW.KABR.FF.W.0007.161226T0013Z-161226T0615Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Aberdeen SD
613 PM CST SUN DEC 25 2016

The National Weather Service in Aberdeen has issued a

* Flash Flood Warning for...
  Rain and Snowmelt in...
  Brown County in northeastern South Dakota...

* Until 1215 AM CST Monday

* At 606 PM CST, local law enforcement officials reported flooding
  over several major intersections in the city of Aberdeen in the
  warned area. Over an inch of rain has already fallen, and when
  combined with melting snow in town, additional flooding problems
  are expected over the next several hours. Flooding is already
  occurring.

Additional rainfall amounts of up to a half inch are possible in the
warned area. Other cities within Brown County may experience the
same problems, especially in low lying areas and near rivers,
streams and creeks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall and melting snow will cause
flooding of small creeks and streams, urban areas, highways, streets
and underpasses as well as other drainage areas and low lying spots.

&&

LAT...LON 4594 9798 4524 9799 4524 9872 4594 9872

$$

Dorn

1 follow-up statement

496 
WGUS73 KABR 260545
FFSABR

Flash Flood Statement
National Weather Service Aberdeen SD
1145 PM CST SUN DEC 25 2016

SDC013-260552-
/O.CAN.KABR.FF.W.0007.000000T0000Z-161226T0615Z/
/00000.0.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Brown SD-
1145 PM CST SUN DEC 25 2016

...THE FLASH FLOOD WARNING FOR RAIN AND SNOWMELT IN BROWN COUNTY IS
CANCELLED...

Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 4594 9798 4524 9799 4524 9872 4594 9872

$$

SD

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 25, 9:36 PM CST	High Wind Warning	ABR	Brown, Buffalo, Clark, Codington, Day, Deuel and 14 more	11 hr
Dec 26, 8:48 AM CST	Winter Weather Advisory	ABR	Brown, Edmunds, McPherson, Spink	6 hr
Dec 26, 11:57 AM CST	Wind Advisory	ABR	Brown, Buffalo, Campbell, Clark, Codington, Day and 16 more	6 hr
Dec 26, 12:05 PM CST	Blizzard Warning	ABR	Campbell, Corson, Dewey, Walworth	3 hr

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.