Alert archive / South Dakota / Wind Advisories in 2017

Wind Advisory 22, NWS Rapid City, SD

November 28, 20176 counties in South Dakota

NWS Rapid City, SD issued this wind advisory at Nov 28, 2017, 12:24 PM MST for 6 counties in South Dakota. It took effect at Nov 28, 2017, 11:00 PM MST. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued: Nov 28, 2017, 12:24 PM MST (19:24 UTC)
In effect from: Nov 28, 2017, 11:00 PM MST
Expired: Nov 29, 2017, 6:00 PM MST
In force: 19 hr
Issued by: NWS Rapid City, SD

Counties Lawrence County, SD, Meade County, SD, Mellette County, SD, Pennington County, SD, Todd County, SD, Tripp County, SD

The radar

The Rapid City radar (KUDX), 90 km from the middle of the area, began a volume at 19:26 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, 7.4 hours before the alert went out and 293 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: 2407 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: -193 m²/s²
0-3 km storm-relative helicity: -26 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 Nov 28, 11:13 AM MST, 1 hour 11 minutes earlier.

Area forecast discussion, Nov 28, 11:13 AM MST, 1 hour 11 minutes before

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Hazardous weather outlook, Nov 28, 6:07 AM MST, 6 hours 17 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
Nov 28, 2:25 AM MST	High Wind Watch	UNR	Butte, Harding, Meade, Perkins, Ziebach	24 hr
Nov 28, 12:24 PM MST	High Wind Warning	UNR	Custer, Lawrence, Meade, Pennington	14 hr

Nearby

Wind Advisories in South Dakota, 2017 Every wind advisory in 2017

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.