Alert archive / South Dakota / High Wind Warnings in 2016

High Wind Warning 6, NWS Rapid City, SD

April 5, 201616 counties in South Dakota; Campbell County, Crook County, Weston County, Wyoming

NWS Rapid City, SD issued this high wind warning at Apr 5, 2016, 3:40 AM MDT for 16 counties in South Dakota; Campbell County, Crook County, Weston County, Wyoming. It took effect at Apr 5, 2016, 12:00 PM MDT. It was in force for 18 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 5, 2016, 3:40 AM MDT (09:40 UTC)
In effect from: Apr 5, 2016, 12:00 PM MDT
Expired: Apr 6, 2016, 5:57 AM MDT
In force: 18 hr
Issued by: NWS Rapid City, SD

Counties Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence 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, Campbell County, WY, Crook County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 12 km from the middle of the area, began a volume at 09:40 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, 9.7 hours before the alert went out and 333 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: 2052 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 252 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 high wind warning 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 high wind warning went out at Apr 4, 10:45 PM MDT, 4 hours 55 minutes earlier.

Area forecast discussion, Apr 4, 10:45 PM MDT, 4 hours 55 minutes before

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Hazardous weather outlook, Apr 4, 7:36 AM MDT, 20 hours 4 minutes before

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In the hours before

Local storm report, Apr 5, 2:40 AM MDT, 1 hour 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 5, 3:39 AM MDT	Red Flag Warning	UNR		17 hr

Nearby

High Wind Warnings in South Dakota, 2016 High Wind Warnings in Wyoming, 2016 Every high wind warning 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.