Alert archive / South Dakota / Tornado Warnings in 2021

Tornado Warning 2, NWS Aberdeen, SD

June 8, 2021Corson County, Dewey County, South Dakota

NWS Aberdeen, SD issued this tornado warning at Jun 8, 2021, 7:21 PM MDT for Corson County, Dewey 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 outline as issued.

The facts

Issued: Jun 8, 2021, 7:21 PM MDT (01:21 UTC)
Expired: Jun 8, 2021, 7:45 PM MDT
In force: 24 min
Issued by: NWS Aberdeen, SD
Area: Storm-based polygon
Tornado: Observed
Hail: 1.0 in

Counties Corson County, SD, Dewey County, SD

The radar

The Bismarck radar (KBIS), 137 km from the middle of the area, began a volume at 01:25 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, 1.4 hours before the alert went out and 137 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: 113 J/kg
Mixed-layer CIN: -181 J/kg
Mixed-layer LCL: 2317 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

152 
WFUS53 KABR 090121
TORABR
SDC031-041-090145-
/O.NEW.KABR.TO.W.0002.210609T0121Z-210609T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Aberdeen SD
721 PM MDT Tue Jun 8 2021

The National Weather Service in Aberdeen has issued a

* Tornado Warning for...
  Southeastern Corson County in north central South Dakota...
  Northern Dewey County in north central South Dakota...

* Until 745 PM MDT.

* At 721 PM MDT, a confirmed tornado was located over Spring Lake, or
  19 miles south of Mclaughlin, moving northeast at 20 mph.

  HAZARD...Damaging tornado and quarter size hail.

  SOURCE...Weather spotters confirmed a tornado west of Trail City 
           at 719 pm MDT.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  southeastern Corson and northern Dewey Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4545 10094 4553 10107 4571 10090 4559 10065
TIME...MOT...LOC 0121Z 220DEG 17KT 4554 10093 

TORNADO...OBSERVED
HAIL...1.00IN

$$

Lueck

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 6:17 PM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	43 min
Jun 8, 6:22 PM MDT	Flash Flood Warning	ABR	Corson	3 hr
Jun 8, 6:44 PM MDT	Flash Flood Warning	ABR	Corson, Dewey	3 hr
Jun 8, 6:44 PM MDT	Special Weather Statement	ABR	Corson	31 min
Jun 8, 7:02 PM MDT	Special Weather Statement	ABR	Corson	28 min
Jun 8, 7:11 PM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	49 min
Jun 8, 7:25 PM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	50 min
Jun 8, 7:44 PM MDT	Tornado Warning	ABR	Corson	16 min
Jun 8, 8:11 PM MDT	Special Weather Statement	ABR	Corson	34 min
Jun 8, 8:28 PM MDT	Severe Thunderstorm Warning	ABR	Dewey	47 min
Jun 8, 9:12 PM MDT	Severe Thunderstorm Warning	ABR	Dewey	36 min
Jun 8, 9:33 PM MDT	Flash Flood Warning Considerable damage threat	ABR	Corson, Dewey	8 hr
Jun 8, 10:54 PM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	66 min
Jun 8, 11:58 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Jones, Stanley	37 min
Jun 9, 12:03 AM MDT	Special Weather Statement	ABR	Corson, Dewey	57 min
Jun 9, 12:40 AM MDT	Special Weather Statement	ABR	Jones, Stanley	65 min

Nearby

Tornado Warnings in South Dakota, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.