Alert archive / South Dakota / Wind Advisories in 2015

Wind Advisory 18, NWS Rapid City, SD

July 28, 2015Haakon County, Lawrence County, Meade County, South Dakota

NWS Rapid City, SD issued this wind advisory at Jul 28, 2015, 2:39 AM MDT for Haakon County, Lawrence County, Meade County, South Dakota. It took effect at Jul 28, 2015, 11:00 AM MDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 28, 2015, 2:39 AM MDT (08:39 UTC)
In effect from: Jul 28, 2015, 11:00 AM MDT
Expired: Jul 28, 2015, 7:00 PM MDT
In force: 8 hr
Issued by: NWS Rapid City, SD

Counties Haakon County, SD, Lawrence County, SD, Meade County, SD

The radar

The Rapid City radar (KUDX), 33 km from the middle of the area, began a volume at 08:40 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 00:00Z, 8.7 hours before the alert went out and 305 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: 1379 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 2017 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 40 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 Jul 28, 2:36 AM MDT, 3 minutes earlier.

Area forecast discussion, Jul 28, 2:36 AM MDT, 3 minutes before

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Hazardous weather outlook, Jul 28, 2:38 AM MDT, 1 minute before

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In the hours before

Local storm report, Jul 27, 10:01 PM MDT, 4 hours 38 minutes before

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Local storm report, Jul 27, 10:02 PM MDT, 4 hours 37 minutes before

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Local storm report, Jul 27, 10:26 PM MDT, 4 hours 13 minutes before

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Local storm report, Jul 27, 11:45 PM MDT, 2 hours 54 minutes before

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Local storm report, Jul 27, 11:48 PM MDT, 2 hours 51 minutes before

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Special weather statement, Jul 27, 11:59 PM MDT, 2 hours 40 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
Jul 27, 6:09 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Harding, Meade, Perkins	51 min
Jul 27, 6:50 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Meade, Pennington, Perkins, Ziebach	85 min
Jul 27, 6:54 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Perkins, Ziebach	82 min
Jul 27, 7:01 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Fall River, Jackson, Pennington	59 min
Jul 27, 7:37 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson	68 min
Jul 27, 8:14 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Meade, Pennington, Ziebach	76 min
Jul 27, 8:28 PM MDT	Severe Thunderstorm Warning	UNR	Harding	37 min
Jul 27, 8:43 PM MDT	Severe Thunderstorm Warning	UNR	Bennett, Haakon, Jackson, Mellette, Todd	62 min
Jul 27, 9:42 PM MDT	Severe Thunderstorm Warning	UNR	Mellette, Tripp	78 min
Jul 27, 9:48 PM MDT	Special Weather Statement	UNR	Bennett, Jackson	42 min
Jul 27, 9:58 PM MDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Mellette	47 min
Jul 27, 10:36 PM MDT	Severe Thunderstorm Warning	UNR	Bennett, Jackson, Mellette, Todd	69 min
Jul 27, 11:23 PM MDT	Severe Thunderstorm Warning	UNR	Mellette, Tripp	37 min
Jul 27, 11:59 PM MDT	Special Weather Statement	UNR	Tripp	46 min
Jul 28, 2:39 AM MDT	High Wind Warning	UNR	Butte, Harding, Meade, Perkins, Ziebach	16 hr

Nearby

Wind Advisories in South Dakota, 2015 Every wind advisory 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.