Alert archive / South Dakota / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Aberdeen, SD

May 31, 201426 counties in South Dakota; Big Stone County, Traverse County, Minnesota

NWS Aberdeen, SD issued this flash flood watch at May 31, 2014, 1:50 PM CDT for 26 counties in South Dakota; Big Stone County, Traverse County, Minnesota. It was in force for 31 hr.

The area

The counties it named.

The facts

Issued: May 31, 2014, 1:50 PM CDT (18:50 UTC)
Expired: Jun 1, 2014, 9:00 PM CDT
In force: 31 hr
Issued by: NWS Aberdeen, SD
Flood severity: None

All 28 counties

Big Stone County, MN, Traverse County, MN, Brown County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 56 km from the middle of the area, began a volume at 18:49 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 12:00Z, 6.8 hours before the alert went out and 34 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: 86 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 717 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before this flash flood watch went out at May 31, 12:47 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, May 31, 12:47 PM CDT, 1 hour 3 minutes before

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Hazardous weather outlook, May 31, 4:38 AM CDT, 9 hours 12 minutes before

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In the hours before

Local storm report, May 31, 9:25 AM CDT, 4 hours 25 minutes before

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Local storm report, May 31, 9:33 AM CDT, 4 hours 17 minutes before

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Local storm report, May 31, 11:45 AM CDT, 2 hours 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 12:32 PM CDT	Areal Flood Warning	ABR	Edmunds, Faulk, Hand, Hyde	6 hr
May 31, 1:04 PM CDT	Areal Flood Warning	ABR	Hand	5 hr

Nearby

Flash Flood Watches in South Dakota, 2014 Flash Flood Watches in Minnesota, 2014 Every flash flood watch in 2014

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.