Alert archive / South Dakota / Tornado Warnings in 2019

Tornado Warning 4, NWS Rapid City, SD

June 29, 2019Bennett County, South Dakota

NWS Rapid City, SD issued this tornado warning at Jun 29, 2019, 2:36 PM MDT for Bennett County, South Dakota. It was in force for 24 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 29, 2019, 2:36 PM MDT (20:36 UTC)
Expired
Jun 29, 2019, 3:00 PM MDT
In force
24 min
Issued by
NWS Rapid City, SD
Area
Storm-based polygon
Tornado
Observed

County Bennett County, SD

The radar

The Rapid City radar (KUDX), 140 km from the middle of the area, began a volume at 20:38 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, 8.6 hours before the alert went out and 322 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-pSkew-T log-p diagram, Aberdeen, SD at 12:00Z on 2019-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2861 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2019-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2861 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
963 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
242 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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 Jun 29, 11:19 AM MDT, 3 hours 17 minutes earlier.

Area forecast discussion, Jun 29, 11:19 AM MDT, 3 hours 17 minutes before
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Hazardous weather outlook, Jun 29, 3:43 AM MDT, 10 hours 53 minutes before
Hazardous Weather Outlook
National Weather Service Rapid City SD
343 AM MDT Sat Jun 29 2019

WYZ055-058-301300-
Southern Campbell-Weston-
343 AM MDT Sat Jun 29 2019

This Hazardous Weather Outlook is for portions of northeast
Wyoming.

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

There is a chance of thunderstorms nearly every day. Severe
thunderstorms are possible.

.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

SDZ014-032-043-046-047-049-301300-
Ziebach-Haakon-Jackson-Mellette-Todd-Tripp-
343 AM MDT Sat Jun 29 2019 /443 AM CDT Sat Jun 29 2019/

This Hazardous Weather Outlook is for portions of western South
Dakota.

.DAY ONE...Today and Tonight

Hot and humid weather will continue, with Heat Index values
generally ranging from 95 to 105. There is a marginal risk of
severe thunderstorms this afternoon and evening, with large hail
and damaging wind gusts possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

There is a chance of thunderstorms nearly every day. Severe
thunderstorms are possible.

.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

SDZ001-002-012-013-024>031-041-042-044-072>074-WYZ054-056-057-071-
301300-
Harding-Perkins-Butte-Northern Meade Co Plains-
Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Fall River-Oglala Lakota-
Bennett-Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northern Campbell-Western Crook-
Wyoming Black Hills-Northeastern Crook-
343 AM MDT Sat Jun 29 2019

This Hazardous Weather Outlook is for portions of northwestern
South Dakota...southwestern South Dakota...the Black Hills of
South Dakota...northeast Wyoming...and the Black Hills of
Wyoming.

.DAY ONE...Today and Tonight

There is a slight chance of thunderstorms this afternoon and
evening. Isolated severe thunderstorms are possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

There is a chance of thunderstorms nearly every day. Severe
thunderstorms are possible.

.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

In the hours before

Special weather statement, Jun 29, 2:27 PM MDT, 9 minutes before
Special Weather Statement
National Weather Service Rapid City SD
227 PM MDT Sat Jun 29 2019

SDZ044-292045-
Bennett SD-
227 PM MDT Sat Jun 29 2019

...STRONG THUNDERSTORM OVER NORTHWESTERN BENNETT COUNTY...

At 226 PM MDT, Doppler radar was tracking a strong thunderstorm over
Allen, or 12 miles northwest of Martin, moving northeast at 5 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Allen.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very heavy rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4317 10193 4326 10206 4339 10191 4326 10174
TIME...MOT...LOC 2026Z 226DEG 4KT 4328 10193

JC

The office that day

Everything else NWS Rapid City, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 2:27 PM MDTSpecial Weather StatementUNRBennett18 min
Jun 29, 2:59 PM MDTTornado Warning Tornado observedUNRBennett35 min
Jun 29, 3:32 PM MDTSevere Thunderstorm WarningUNRBennett, Jackson42 min

Nearby

Tornado Warnings in South Dakota, 2019Every tornado warning in 2019Tornadoes in 2019

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.