Alert archive / South Dakota / Wind Advisories in 2012

Wind Advisory 26, NWS Rapid City, SD

May 5, 20127 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at May 5, 2012, 2:48 PM MDT for 7 counties in South Dakota. It took effect at May 6, 2012, 10:00 AM MDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: May 5, 2012, 2:48 PM MDT (20:48 UTC)
In effect from: May 6, 2012, 10:00 AM MDT
Expired: May 6, 2012, 7:00 PM MDT
In force: 9 hr
Issued by: NWS Rapid City, SD

Counties Butte County, SD, Haakon County, SD, Harding County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 81 km from the middle of the area, began a volume at 20:50 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

Aberdeen, SD (KABR), launched 12:00Z, 8.8 hours before the alert went out and 331 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: 554 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 60 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 May 5, 2:47 PM MDT, 1 minute earlier.

Area forecast discussion, May 5, 2:47 PM MDT, 1 minute before

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Hazardous weather outlook, May 5, 2:02 PM MDT, 46 minutes before

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In the hours before

Local storm report, May 5, 10:37 AM MDT, 4 hours 11 minutes before

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Local storm report, May 5, 10:56 AM MDT, 3 hours 52 minutes before

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Local storm report, May 5, 10:58 AM MDT, 3 hours 50 minutes before

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Local storm report, May 5, 11:27 AM MDT, 3 hours 21 minutes before

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Local storm report, May 5, 1:14 PM MDT, 1 hour 34 minutes before

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Local storm report, May 5, 1:33 PM MDT, 1 hour 15 minutes before

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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 5, 12:57 AM MDT	Special Weather Statement	UNR	Lawrence	48 min
May 5, 1:49 AM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	56 min
May 5, 1:54 AM MDT	Special Weather Statement	UNR	Meade	66 min
May 5, 2:46 AM MDT	Special Weather Statement	UNR	Pennington	59 min
May 5, 2:47 AM MDT	Special Weather Statement	UNR	Lawrence	43 min
May 5, 2:50 AM MDT	Special Weather Statement	UNR	Custer	40 min
May 5, 2:59 AM MDT	Severe Thunderstorm Warning	UNR	Custer, Lawrence, Pennington	61 min
May 5, 3:45 AM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	60 min
May 5, 3:55 AM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	51 min
May 5, 4:20 AM MDT	Severe Thunderstorm Warning	UNR	Jackson	55 min
May 5, 4:27 AM MDT	Special Weather Statement	UNR	Custer	48 min
May 5, 4:39 AM MDT	Severe Thunderstorm Warning	UNR	Custer, Fall River	66 min
May 5, 4:54 AM MDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	66 min
May 5, 5:02 AM MDT	Severe Thunderstorm Warning	UNR	Tripp	48 min
May 5, 5:31 AM MDT	Severe Thunderstorm Warning	UNR	Jackson, Pennington	59 min
May 5, 5:45 AM MDT	Severe Thunderstorm Warning	UNR	Pennington	60 min
May 5, 6:37 AM MDT	Special Weather Statement	UNR	Jackson	53 min
May 5, 7:33 AM MDT	Special Weather Statement	UNR	Mellette	42 min
May 5, 4:32 PM MDT	Special Weather Statement	UNR	Custer	58 min
May 5, 1:07 AM MDT	Special Weather Statement	UNR	Weston	53 min
May 5, 2:06 AM MDT	Special Weather Statement	UNR	Weston	54 min

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.