Alert archive / South Dakota / High Wind Watches in 2015

High Wind Watch 1, NWS Aberdeen, SD

July 27, 20155 counties in South Dakota

NWS Aberdeen, SD issued this high wind watch at Jul 27, 2015, 2:28 PM CDT for 5 counties in South Dakota. It took effect at Jul 28, 2015, 1:00 PM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Jul 27, 2015, 2:28 PM CDT (19:28 UTC)
In effect from: Jul 28, 2015, 1:00 PM CDT
Expired: Jul 28, 2015, 3:46 AM CDT
In force
Issued by: NWS Aberdeen, SD

Counties Campbell County, SD, Corson County, SD, Dewey County, SD, McPherson County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 139 km from the middle of the area, began a volume at 19:30 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 (KRAP), launched 12:00Z, 7.5 hours before the alert went out and 264 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: 237 J/kg
Mixed-layer CIN: -666 J/kg
Mixed-layer LCL: 1635 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high wind watch 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 high wind watch went out at Jul 27, 12:55 PM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, Jul 27, 12:55 PM CDT, 1 hour 33 minutes before

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Hazardous weather outlook, Jul 27, 4:09 AM CDT, 10 hours 19 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>
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        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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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 10:17 PM CDT	Special Weather Statement	ABR	Corson	43 min
Jul 26, 11:36 PM CDT	Special Weather Statement	ABR	Campbell	39 min

Nearby

High Wind Watches in South Dakota, 2015 Every high wind watch in 2015

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.