Alert archive / South Dakota / Areal Flood Warnings in 2008

Areal Flood Warning 3, NWS Sioux Falls, SD

June 7, 20086 counties in South Dakota

NWS Sioux Falls, SD issued this areal flood warning at Jun 7, 2008, 10:58 AM CDT for 6 counties in South Dakota. It was in force for 24 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: Jun 7, 2008, 10:58 AM CDT (15:58 UTC)
Expired: Jun 8, 2008, 11:00 AM CDT
In force: 24 hr
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: None

Counties Bon Homme County, SD, Charles Mix County, SD, Douglas County, SD, Hanson County, SD, Hutchinson County, SD, McCook County, SD

The radar

The Sioux Falls radar (KFSD), 102 km from the middle of the area, began a volume at 16:00 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

Omaha, NE (KOAX), launched 12:00Z, 4.0 hours before the alert went out and 263 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: 2630 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 532 m²/s²
0-3 km storm-relative helicity: 539 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.7

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 Sioux Falls, SD wrote its last area forecast discussion before this areal flood warning went out at Jun 7, 4:15 AM CDT, 6 hours 43 minutes earlier.

Area forecast discussion, Jun 7, 4:15 AM CDT, 6 hours 43 minutes before

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Hazardous weather outlook, Jun 7, 5:42 AM CDT, 5 hours 16 minutes before

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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 10:22 PM CDT	River Flood Warning	FSD	McCook, Turner	36 hr
Jun 7, 2:10 AM CDT	Severe Thunderstorm Warning	FSD	Brookings, Lake, Moody	28 min
Jun 7, 3:14 AM CDT	Flash Flood Watch	FSD	Bon Homme, Clay, Lincoln, Turner, Union, Yankton	27 hr
Jun 7, 4:58 PM CDT	Severe Thunderstorm Warning	FSD	Ida	20 min

Nearby

Areal Flood Warnings in South Dakota, 2008 Every areal flood warning in 2008

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.