Alert archive / South Dakota / Wind Advisories in 2012

Wind Advisory 12, NWS Rapid City, SD

February 25, 201214 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at Feb 25, 2012, 10:06 AM MST for 14 counties in South Dakota. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Feb 25, 2012, 10:06 AM MST (17:06 UTC)
Expired: Feb 25, 2012, 6:00 PM MST
In force: 8 hr
Issued by: NWS Rapid City, SD

Counties Bennett County, SD, Butte County, SD, Custer County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 61 km from the middle of the area, began a volume at 17:08 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

Rapid City, SD (KUNR), launched 12:00Z, 5.1 hours before the alert went out and 66 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: 1113 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 344 m²/s²
0-3 km storm-relative helicity: 375 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 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 Feb 25, 3:16 AM MST, 6 hours 50 minutes earlier.

Area forecast discussion, Feb 25, 3:16 AM MST, 6 hours 50 minutes before

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Hazardous weather outlook, Feb 25, 6:21 AM MST, 3 hours 45 minutes before

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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.
      </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
Feb 25, 2:54 PM MST	Winter Storm Watch	UNR	Bennett, Butte, Custer, Fall River, Haakon, Harding and 10 more	47 hr
Feb 25, 2:54 PM MST	Winter Weather Advisory	UNR	Custer, Lawrence, Meade, Pennington	24 hr
Feb 25, 3:09 PM MST	High Wind Warning	UNR	Butte, Haakon, Harding, Meade, Pennington, Perkins and 1 more	19 hr

Nearby

Wind Advisories in South Dakota, 2012 Every wind advisory in 2012

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.