Alert archive / South Dakota / Wind Advisories in 2011

Wind Advisory 16, NWS Rapid City, SD

May 30, 20116 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at May 30, 2011, 2:39 PM MDT for 6 counties in South Dakota. It took effect at May 31, 2011, 3:12 AM MDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: May 30, 2011, 2:39 PM MDT (20:39 UTC)
In effect from: May 31, 2011, 3:12 AM MDT
Expired: May 31, 2011, 5:56 PM MDT
In force: 15 hr
Issued by: NWS Rapid City, SD

Counties Butte County, SD, Haakon County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 45 km from the middle of the area, began a volume at 20:40 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.7 hours before the alert went out and 294 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: 625 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 383 m²/s²
0-3 km storm-relative helicity: 991 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Rapid City, SD wrote its last area forecast discussion before this wind advisory went out at May 29, 3:12 PM MDT, 23 hours 27 minutes earlier.

Area forecast discussion, May 29, 3:12 PM MDT, 23 hours 27 minutes before

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Hazardous weather outlook, May 29, 3:15 PM MDT, 23 hours 24 minutes before

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</head>
<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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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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 Rapid City, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 29, 11:58 PM MDT	Areal Flood Warning	UNR	Butte	6 hr
May 30, 3:56 AM MDT	High Wind Watch	UNR	Butte, Harding, Meade, Perkins, Ziebach	11 hr
May 30, 2:39 PM MDT	High Wind Warning	UNR	Harding, Perkins	27 hr
May 30, 2:57 PM MDT	Areal Flood Advisory	UNR	Pennington	20 hr

Nearby

Wind Advisories in South Dakota, 2011 Every wind advisory in 2011

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.