Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS Rapid City, SD

June 8, 2021Perkins County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 8, 2021, 4:54 PM MDT for Perkins County, South Dakota. It was in force for 66 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 8, 2021, 4:54 PM MDT (22:54 UTC)
Expired: Jun 8, 2021, 6:00 PM MDT
In force: 66 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Perkins County, SD

The radar

The Bismarck radar (KBIS), 157 km from the middle of the area, began a volume at 22:55 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.

What was reported inside it

Time	Report	Where	Remark
Jun 8, 4:55 PM MDT	TSTM WND GST 59	7 Sse Meadow, SD
Jun 8, 4:56 PM MDT	HAIL 1.5	Meadow, SD	AT LEAST PING PONG BALL AT LARGEST. HAIL FOR 30 MINUTES, JUST ENDED.
Jun 8, 5:06 PM MDT	TSTM WND GST 63	7 S Shadehill, SD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.9 hours before the alert went out and 160 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: 534 J/kg
Mixed-layer CIN: -518 J/kg
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.5

Open this sounding in Storm Lab

The text

As transmitted.

974 
WUUS53 KUNR 082254
SVRUNR
SDC105-090000-
/O.NEW.KUNR.SV.W.0021.210608T2254Z-210609T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Rapid City SD
454 PM MDT Tue Jun 8 2021

The National Weather Service in Rapid City has issued a

* Severe Thunderstorm Warning for...
  Northeastern Perkins County in northwestern South Dakota...

* Until 600 PM MDT.

* At 454 PM MDT, a severe thunderstorm was located over Meadow, or 27
  miles south of Lemmon, moving northeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Shadehill and Meadow.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4594 10200 4565 10201 4556 10199 4543 10217
      4549 10238 4595 10220
TIME...MOT...LOC 2254Z 204DEG 27KT 4554 10220 

HAIL...1.00IN
WIND...60MPH
 
$$

Eagan

4 follow-up statements

892 
WWUS53 KUNR 082310
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
510 PM MDT Tue Jun 8 2021

SDC105-090000-
/O.CON.KUNR.SV.W.0021.000000T0000Z-210609T0000Z/
Perkins SD-
510 PM MDT Tue Jun 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR NORTHEASTERN PERKINS COUNTY...

At 509 PM MDT, a severe thunderstorm was located 7 miles north of 
Meadow, or 21 miles south of Lemmon, moving north at 25 mph. At 456 
PM MDT, ping pong ball size hail was reported in Meadow.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lemmon, Meadow, Shadehill, and Shadehill Reservoir. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on or near Shadehill Reservoir, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4594 10200 4565 10201 4554 10206 4551 10220
      4554 10236 4595 10220
TIME...MOT...LOC 2309Z 185DEG 23KT 4564 10221 

HAIL...1.00IN
WIND...60MPH
 
$$

Eagan

118 
WWUS53 KUNR 082318
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
518 PM MDT Tue Jun 8 2021

SDC105-090000-
/O.CON.KUNR.SV.W.0021.000000T0000Z-210609T0000Z/
Perkins SD-
518 PM MDT Tue Jun 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR NORTHEASTERN PERKINS COUNTY...

At 518 PM MDT, a severe thunderstorm was located 4 miles southeast of
Shadehill Reservoir, or 17 miles south of Lemmon, moving north at 25
mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Lemmon, Shadehill, and Shadehill Reservoir. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on or near Shadehill Reservoir, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4594 10200 4566 10203 4557 10213 4555 10224
      4557 10235 4595 10220
TIME...MOT...LOC 2318Z 190DEG 22KT 4569 10223 

HAIL...1.50IN
WIND...60MPH
 
$$

Eagan

279 
WWUS53 KUNR 082338
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
538 PM MDT Tue Jun 8 2021

SDC105-090000-
/O.CON.KUNR.SV.W.0021.000000T0000Z-210609T0000Z/
Perkins SD-
538 PM MDT Tue Jun 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR NORTHEASTERN PERKINS COUNTY...

At 537 PM MDT, a severe thunderstorm was located 3 miles south of
Shadehill, or 15 miles south of Lemmon, moving northeast at 10 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lemmon, Shadehill, and Shadehill Reservoir. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on or near Shadehill Reservoir, get away from the water and move 
indoors or inside a vehicle. Remember, lightning can strike out to 
15 miles from the parent thunderstorm. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4566 10203 4560 10215 4562 10233 4595 10220
      4594 10200
TIME...MOT...LOC 2337Z 202DEG 9KT 4571 10219 

HAIL...1.25IN
WIND...60MPH
 
$$

Eagan

729 
WWUS53 KUNR 082355
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
555 PM MDT Tue Jun 8 2021

SDC105-090005-
/O.EXP.KUNR.SV.W.0021.000000T0000Z-210609T0000Z/
Perkins SD-
555 PM MDT Tue Jun 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PERKINS COUNTY
WILL EXPIRE AT 600 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small 
hail, gusty winds, and heavy rain are still possible with this 
thunderstorm.

LAT...LON 4566 10203 4560 10215 4562 10233 4595 10220
      4594 10200
TIME...MOT...LOC 2355Z 204DEG 27KT 4583 10211 

$$

Eagan

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 6:44 PM MDT	Special Weather Statement	UNR	Fall River	46 min
Jun 7, 7:29 PM MDT	Special Weather Statement	UNR	Fall River	46 min
Jun 7, 8:43 PM MDT	Special Weather Statement	UNR	Fall River	47 min
Jun 8, 2:17 PM MDT	Special Weather Statement	UNR	Haakon	28 min
Jun 8, 2:20 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	55 min
Jun 8, 3:32 PM MDT	Special Weather Statement	UNR	Perkins	43 min
Jun 8, 4:07 PM MDT	Special Weather Statement	UNR	Ziebach	38 min
Jun 8, 4:22 PM MDT	Special Weather Statement	UNR	Perkins	53 min
Jun 8, 4:45 PM MDT	Special Weather Statement	UNR	Perkins	30 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.