Alert archive / South Dakota / Areal Flood Warnings in 2016

Areal Flood Warning 2, NWS Aberdeen, SD

July 11, 2016Day County, Grant County, Roberts County, South Dakota; Big Stone County, Traverse County, Minnesota

NWS Aberdeen, SD issued this areal flood warning at Jul 11, 2016, 9:09 AM CDT for Day County, Grant County, Roberts County, South Dakota; Big Stone County, Traverse County, Minnesota. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 11, 2016, 9:09 AM CDT (14:09 UTC)
Expired: Jul 11, 2016, 6:00 PM CDT
In force: 9 hr
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Flood severity: None

Counties Big Stone County, MN, Traverse County, MN, Day County, SD, Grant County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 123 km from the middle of the area, began a volume at 14:10 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, 2.2 hours before the alert went out and 138 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: 1008 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 256 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Jul 11, 6:30 AM CDT, 2 hours 39 minutes earlier.

Area forecast discussion, Jul 11, 6:30 AM CDT, 2 hours 39 minutes before

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Hazardous weather outlook, Jul 11, 4:37 AM CDT, 4 hours 32 minutes before

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In the hours before

Local storm report, Jul 11, 8:23 AM CDT, 46 minutes before

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Local storm report, Jul 11, 8:50 AM CDT, 19 minutes before

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Local storm report, Jul 11, 8:51 AM CDT, 18 minutes before

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Local storm report, Jul 11, 8:55 AM CDT, 14 minutes before

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Local storm report, Jul 11, 8:56 AM CDT, 13 minutes before

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Local storm report, Jul 11, 9:05 AM CDT, 4 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 7:36 PM CDT	Severe Thunderstorm Warning	ABR	Corson	54 min
Jul 10, 8:31 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	37 min
Jul 10, 9:35 PM CDT	Special Weather Statement	ABR	Corson	55 min
Jul 10, 9:42 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson	48 min
Jul 10, 10:31 PM CDT	Special Weather Statement	ABR	Campbell, Walworth	59 min
Jul 10, 10:38 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Edmunds, McPherson, Walworth	67 min
Jul 10, 11:47 PM CDT	Special Weather Statement	ABR	Campbell	58 min
Jul 11, 12:16 AM CDT	Special Weather Statement	ABR	Brown, Marshall	59 min
Jul 11, 2:06 AM CDT	Special Weather Statement	ABR	Roberts	24 min
Jul 11, 4:00 AM CDT	Red Flag Warning	ABR		16 hr
Jul 11, 6:42 AM CDT	Areal Flood Warning	ABR	Grant, Roberts	6 hr
Jul 11, 12:32 PM CDT	Special Weather Statement	ABR	Roberts	43 min
Jul 11, 1:26 PM CDT	Special Weather Statement	ABR	Campbell, Walworth	49 min
Jul 11, 1:54 PM CDT	Special Weather Statement	ABR	McPherson	51 min
Jul 11, 3:32 PM CDT	Special Weather Statement	ABR	Corson	43 min
Jul 11, 4:17 PM CDT	Special Weather Statement	ABR	Corson	43 min
Jul 11, 4:58 PM CDT	Special Weather Statement	ABR	Corson	47 min
Jul 11, 5:25 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	50 min
Jul 11, 6:05 PM CDT	Special Weather Statement	ABR	McPherson	25 min
Jul 11, 6:12 PM CDT	Special Weather Statement	ABR	McPherson	33 min
Jul 11, 6:37 PM CDT	Special Weather Statement	ABR	McPherson	23 min
Jul 11, 6:59 PM CDT	Special Weather Statement	ABR	McPherson	31 min

Nearby

Areal Flood Warnings in South Dakota, 2016 Areal Flood Warnings in Minnesota, 2016 Every areal 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.