Alert archive / South Dakota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 39, NWS Rapid City, SD

June 11, 2017Butte County, Lawrence County, Meade County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 11, 2017, 1:05 AM MDT for Butte County, Lawrence County, Meade County, South Dakota. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 11, 2017, 1:05 AM MDT (07:05 UTC)
Expired: Jun 11, 2017, 2:00 AM MDT
In force: 55 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Butte County, SD, Lawrence County, SD, Meade County, SD

The radar

The Rapid City radar (KUDX), 68 km from the middle of the area, began a volume at 07:07 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 10, 9:01 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 7.1 hours before the alert went out and 70 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: 95 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2486 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 10, 11:08 PM MDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jun 10, 11:08 PM MDT, 1 hour 57 minutes before

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Hazardous weather outlook, Jun 10, 6:30 AM MDT, 18 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Rapid City SD
630 AM MDT Sat Jun 10 2017

SDZ001-002-027-041-WYZ054-055-111300-
Harding-Perkins-Southern Foot Hills-Fall River-Northern Campbell-
Southern Campbell-
630 AM MDT Sat Jun 10 2017

This Hazardous weather outlook is for portions of western South
Dakota...and northeast Wyoming.

.DAY ONE...Today and Tonight

Isolated thunderstorms are possible this evening and overnight.
The chance for severe storms is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

A widespread severe weather event is possible on Monday afternoon
and evening. Large hail, damaging wind gusts, and a few tornadoes
will be the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

SDZ012>014-024>026-028>032-042>044-046-047-049-072>074-WYZ056>058-
071-111300-
Butte-Northern Meade Co Plains-Ziebach-Northern Black Hills-
Northern Foot Hills-Rapid City-Central Black Hills-
Southern Black Hills-Custer Co Plains-Pennington Co Plains-Haakon-
Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Western Crook-Wyoming Black Hills-Weston-
Northeastern Crook-
630 AM MDT Sat Jun 10 2017 /730 AM CDT Sat Jun 10 2017/

This Hazardous weather outlook is for portions of south central
South Dakota...the Black Hills of South Dakota...western South
Dakota...northeast Wyoming...and the Black Hills of Wyoming.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected tonight. Some storms may be
severe with large hail being the main threat.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

A widespread severe weather event is possible on Monday afternoon
and evening. Large hail, damaging wind gusts, and a few tornadoes
will be the main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

Bunkers

In the hours before

Local storm report, Jun 10, 11:45 PM MDT, 1 hour 20 minutes before

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Special weather statement, Jun 10, 11:48 PM MDT, 1 hour 17 minutes before

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Special weather statement, Jun 10, 11:53 PM MDT, 1 hour 12 minutes before

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Special weather statement, Jun 11, 12:01 AM MDT, 1 hour 4 minutes before

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Special weather statement, Jun 11, 12:40 AM MDT, 25 minutes before

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Special weather statement, Jun 11, 12:43 AM MDT, 22 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
Jun 10, 8:40 PM MDT	Special Weather Statement	UNR	Pennington	50 min
Jun 10, 8:45 PM MDT	Special Weather Statement	UNR	Custer	45 min
Jun 10, 8:58 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	50 min
Jun 10, 9:24 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	66 min
Jun 10, 9:42 PM MDT	Special Weather Statement	UNR	Haakon	48 min
Jun 10, 10:30 PM MDT	Special Weather Statement	UNR	Pennington	45 min
Jun 10, 10:51 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	54 min
Jun 10, 11:19 PM MDT	Special Weather Statement	UNR	Lawrence	41 min
Jun 10, 11:48 PM MDT	Special Weather Statement	UNR	Lawrence	42 min
Jun 11, 12:01 AM MDT	Special Weather Statement	UNR	Meade	44 min
Jun 11, 12:40 AM MDT	Special Weather Statement	UNR	Butte	35 min
Jun 11, 12:43 AM MDT	Special Weather Statement	UNR	Lawrence	32 min
Jun 11, 2:14 AM MDT	Special Weather Statement	UNR	Meade	46 min
Jun 10, 8:49 PM MDT	Special Weather Statement	UNR	Weston	41 min
Jun 10, 9:47 PM MDT	Special Weather Statement	UNR	Weston	43 min
Jun 10, 10:10 PM MDT	Special Weather Statement	UNR	Weston	35 min
Jun 10, 10:34 PM MDT	Special Weather Statement	UNR	Weston	41 min
Jun 10, 11:53 PM MDT	Special Weather Statement	UNR	Weston	52 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2017 Every severe thunderstorm warning 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.