Alert archive / South Dakota / Tornado Warnings in 2021

Tornado Warning 3, NWS Rapid City, SD

May 23, 2021Meade County, Perkins County, South Dakota

NWS Rapid City, SD issued this tornado warning at May 23, 2021, 3:13 PM MDT for Meade County, Perkins County, South Dakota. It was in force for 47 min. 4 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: May 23, 2021, 3:13 PM MDT (21:13 UTC)
Expired: May 23, 2021, 4:00 PM MDT
In force: 47 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Meade County, SD, Perkins County, SD

The radar

The Rapid City radar (KUDX), 123 km from the middle of the area, began a volume at 21:14 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
May 23, 3:35 PM MDT	TSTM WND GST 60	8 Wnw Usta, SD
May 23, 3:50 PM MDT	TORNADO	6 Nnw Usta, SD	TORNADO OCCURRED IN OPEN GRASSLAND. NO DAMAGE REPORTED OR OBSERVED. EF UNKNOWN. PATH LENGTH 2.2 MILES.
May 23, 3:52 PM MDT	TORNADO	23 Nnw Faith, SD
May 23, 3:58 PM MDT	TORNADO	10 S Meadow, SD	TORNADO OCCURRED IN OPEN GRASSLAND. NO DAMAGE REPORTED OR OBSERVED. EF UNKOWN. PATH LENGTH 3.8 MILES.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
May 23, 1:50 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.2 hours before the alert went out and 130 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 271 m²/s²
0-3 km storm-relative helicity: 339 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

252 
WFUS53 KUNR 232113
TORUNR
SDC093-105-232200-
/O.NEW.KUNR.TO.W.0003.210523T2113Z-210523T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Rapid City SD
313 PM MDT Sun May 23 2021

The National Weather Service in Rapid City has issued a

* Tornado Warning for...
  Northern Meade County in west central South Dakota...
  Southeastern Perkins County in northwestern South Dakota...

* Until 400 PM MDT.
    
* At 313 PM MDT, a severe thunderstorm capable of producing a tornado
  was located 11 miles northeast of Opal, or 13 miles west of Faith,
  moving north at 40 mph.

  HAZARD...Tornado and golf ball size hail.

  SOURCE...Radar indicated rotation.

  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.

* Locations impacted include...
  Usta and Chance.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4497 10219 4497 10238 4542 10245 4542 10204
TIME...MOT...LOC 2113Z 180DEG 34KT 4503 10230 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

Eagan

2 follow-up statements

480 
WWUS53 KUNR 232125
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
325 PM MDT Sun May 23 2021

SDC093-232135-
/O.CAN.KUNR.TO.W.0003.000000T0000Z-210523T2200Z/
Meade SD-
325 PM MDT Sun May 23 2021

...THE TORNADO WARNING FOR NORTHERN MEADE COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 900 PM MDT for northwestern
South Dakota.

LAT...LON 4506 10218 4506 10236 4542 10245 4542 10204
TIME...MOT...LOC 2125Z 183DEG 28KT 4513 10227 

$$

SDC105-232200-
/O.CON.KUNR.TO.W.0003.000000T0000Z-210523T2200Z/
Perkins SD-
325 PM MDT Sun May 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR
SOUTHEASTERN PERKINS COUNTY...
    
At 325 PM MDT, a severe thunderstorm capable of producing a tornado
was located 8 miles southwest of Usta, or 14 miles northwest of
Faith, moving north at 30 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

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.

Locations impacted include...
Chance and Usta. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4506 10218 4506 10236 4542 10245 4542 10204
TIME...MOT...LOC 2125Z 183DEG 28KT 4513 10227 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Eagan

099 
WWUS53 KUNR 232146
SVSUNR

Severe Weather Statement
National Weather Service Rapid City SD
346 PM MDT Sun May 23 2021

SDC105-232200-
/O.CON.KUNR.TO.W.0003.000000T0000Z-210523T2200Z/
Perkins SD-
346 PM MDT Sun May 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR
SOUTHEASTERN PERKINS COUNTY...
    
At 346 PM MDT, a severe thunderstorm capable of producing a tornado
was located 7 miles south of Chance, or 23 miles northwest of Faith,
moving north at 40 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

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.

Locations impacted include...
Chance.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4523 10217 4523 10235 4542 10242 4542 10208
TIME...MOT...LOC 2146Z 178DEG 35KT 4531 10227 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Eagan

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 3:20 AM MDT	Special Weather Statement	UNR	Oglala Lakota	40 min
May 23, 4:57 AM MDT	Special Weather Statement	UNR	Meade	33 min
May 23, 5:23 AM MDT	Special Weather Statement	UNR	Jackson	37 min
May 23, 1:40 PM MDT	Special Weather Statement	UNR	Fall River	35 min
May 23, 2:00 PM MDT	Special Weather Statement	UNR	Custer	30 min
May 23, 2:02 PM MDT	Special Weather Statement	UNR	Meade	28 min
May 23, 2:16 PM MDT	Special Weather Statement	UNR	Pennington	29 min
May 23, 2:45 PM MDT	Tornado Warning	UNR	Meade	30 min
May 23, 3:34 PM MDT	Special Weather Statement	UNR	Fall River	26 min
May 23, 3:53 PM MDT	Severe Thunderstorm Warning	UNR	Custer	37 min
May 23, 3:58 PM MDT	Tornado Warning	UNR	Perkins	47 min
May 23, 3:59 PM MDT	Tornado Warning	UNR	Custer	31 min
May 23, 4:14 PM MDT	Tornado Warning	UNR	Custer, Pennington	13 min
May 23, 4:26 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Lawrence, Meade, Pennington	49 min
May 23, 4:26 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Meade, Pennington	33 min
May 23, 5:04 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Meade, Pennington	30 min
May 23, 5:35 PM MDT	Special Weather Statement	UNR	Perkins	40 min
May 23, 5:53 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Meade, Pennington, Ziebach	67 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.