Alert archive / South Dakota / Wind Advisories in 2016

Wind Advisory 11, NWS Rapid City, SD

April 6, 201614 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at Apr 6, 2016, 2:45 PM MDT for 14 counties in South Dakota. It took effect at Apr 7, 2016, 9:00 AM MDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Apr 6, 2016, 2:45 PM MDT (20:45 UTC)
In effect from: Apr 7, 2016, 9:00 AM MDT
Expired: Apr 7, 2016, 7:00 PM MDT
In force: 10 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 20:46 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, 8.8 hours before the alert went out and 312 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: 573 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 93 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 Apr 5, 5:14 PM MDT, 21 hours 31 minutes earlier.

Area forecast discussion, Apr 5, 5:14 PM MDT, 21 hours 31 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
Apr 6, 2:59 AM MDT	Wind Advisory	UNR	Bennett, Butte, Haakon, Harding, Jackson, Lawrence and 7 more	16 hr

Nearby

Wind Advisories in South Dakota, 2016 Every wind advisory in 2016

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.