Alert archive / South Dakota / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 270, NWS Sioux Falls, SD

September 14, 20104 counties in South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Sep 14, 2010, 11:41 PM CDT for 4 counties in South Dakota. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 14, 2010, 11:41 PM CDT (04:41 UTC)
Expired
Sep 15, 2010, 12:15 AM CDT
In force
34 min
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Hail
1.25 in
Wind
58.0 mph

Counties Beadle County, SD, Kingsbury County, SD, Miner County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 114 km from the middle of the area, began a volume at 04:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 14, 9:54 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 4.7 hours before the alert went out and 346 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2010-09-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2010-09-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1730 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
169 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 severe thunderstorm 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 severe thunderstorm warning went out at Sep 14, 8:45 PM CDT, 2 hours 56 minutes earlier.

Area forecast discussion, Sep 14, 8:45 PM CDT, 2 hours 56 minutes before
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Hazardous weather outlook, Sep 14, 11:30 AM CDT, 12 hours 11 minutes before
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<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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In the hours before

Local storm report, Sep 14, 11:26 PM CDT, 15 minutes before
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<head>
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  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        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 Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 14, 10:45 PM CDTSevere Thunderstorm WarningFSDBeadle19 min
Sep 14, 11:19 PM CDTSevere Thunderstorm WarningFSDBrule26 min
Sep 14, 11:42 PM CDTSevere Thunderstorm WarningFSDBrule19 min
Sep 15, 12:12 AM CDTSevere Thunderstorm WarningFSDMiner33 min
Sep 15, 12:22 AM CDTSevere Thunderstorm WarningFSDMoody13 min
Sep 15, 12:34 AM CDTSevere Thunderstorm WarningFSDAurora, Jerauld, Sanborn26 min
Sep 15, 12:40 AM CDTSevere Thunderstorm WarningFSDLake, Miner35 min
Sep 15, 1:56 AM CDTSevere Thunderstorm WarningFSDMinnehaha34 min
Sep 15, 9:59 AM CDTRiver Flood WarningFSDBeadle9 days
Sep 15, 9:59 AM CDTRiver Flood WarningFSDSanborn13 days
Sep 15, 9:59 AM CDTRiver Flood WarningFSDDavison, Hanson18 days
Sep 15, 3:06 PM CDTSevere Thunderstorm WarningFSDBon Homme, Yankton24 min
Sep 15, 3:28 PM CDTSevere Thunderstorm WarningFSDBon Homme, Yankton32 min
Sep 15, 3:38 PM CDTSevere Thunderstorm WarningFSDLake, Miner37 min
Sep 15, 4:00 PM CDTSevere Thunderstorm WarningFSDClay, Yankton45 min
Sep 15, 5:17 PM CDTSevere Thunderstorm WarningFSDUnion28 min
Sep 15, 5:39 PM CDTSevere Thunderstorm WarningFSDCherokee, Plymouth, Woodbury51 min
Sep 15, 6:21 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee, Ida54 min
Sep 15, 2:43 AM CDTSevere Thunderstorm WarningFSDNobles32 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2010Every severe thunderstorm warning in 2010

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.