Alert archive / South Dakota / Tornado Warnings in 2015

Tornado Warning 17, NWS Rapid City, SD

July 5, 2015Tripp County, South Dakota

NWS Rapid City, SD issued this tornado warning at Jul 5, 2015, 8:31 PM CDT for Tripp County, South Dakota. It was in force for 32 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: Jul 5, 2015, 8:31 PM CDT (01:31 UTC)
Expired: Jul 5, 2015, 9:03 PM CDT
In force: 32 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Tripp County, SD

The radar

The North Platte radar (KLNX), 164 km from the middle of the area, began a volume at 01:32 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
Jul 5, 4:51 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.5 hours before the alert went out and 209 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: 1725 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1201 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Jul 5, 6:31 PM CDT, 2 hours earlier.

Area forecast discussion, Jul 5, 6:31 PM CDT, 2 hours before

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Hazardous weather outlook, Jul 5, 4:10 PM CDT, 4 hours 21 minutes before

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In the hours before

Local storm report, Jul 5, 4:33 PM CDT, 3 hours 58 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 5, 7:03 PM CDT	Severe Thunderstorm Warning	UNR	Bennett, Mellette, Todd	72 min
Jul 5, 7:49 PM CDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	56 min
Jul 5, 8:38 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	82 min
Jul 5, 9:10 PM CDT	Tornado Warning	UNR	Tripp	35 min
Jul 5, 10:48 PM CDT	Areal Flood Advisory	UNR	Mellette, Tripp	12 hr

Nearby

Tornado Warnings in South Dakota, 2015 Every tornado warning in 2015 Tornadoes 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.