Alert archive / South Dakota / Tornado Warnings in 2019

Tornado Warning 5, NWS Sioux Falls, SD

June 30, 2019Gregory County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jun 30, 2019, 4:23 PM CDT for Gregory County, South Dakota. It was in force for 37 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 30, 2019, 4:23 PM CDT (21:23 UTC)
Expired: Jun 30, 2019, 5:00 PM CDT
In force: 37 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Gregory County, SD

The radar

The North Platte radar (KLNX), 184 km from the middle of the area, began a volume at 21:23 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 30, 4:24 PM CDT	TORNADO 0	8 Nne Burke, SD	TREE AND CROP DAMAGE
Jun 30, 4:27 PM CDT	HAIL 1.75	7 N Burke, SD
Jun 30, 4:28 PM CDT	TORNADO	10 Ne Burke, SD	TORNADO LIFTED AT 4:36 PM.

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.4 hours before the alert went out and 191 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: 1889 J/kg
Mixed-layer CIN: -336 J/kg
Mixed-layer LCL: 1008 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -169 m²/s²
0-3 km storm-relative helicity: -67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.1

Open this sounding in Storm Lab

The text

As transmitted.

291 
WFUS53 KFSD 302123
TORFSD
SDC053-302200-
/O.NEW.KFSD.TO.W.0005.190630T2123Z-190630T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
423 PM CDT Sun Jun 30 2019

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Northwestern Gregory County in south central South Dakota...

* Until 500 PM CDT.
    
* At 423 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles northeast of Burke, or 33 miles east of 
  Winner, moving east at 10 mph. Another rotating storm was located 
  just east of Gregory.

  HAZARD...Tornado.

  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.

* This tornadic thunderstorm will remain over mainly rural areas of
  northwestern Gregory County.

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 4333 9939 4340 9914 4321 9897 4321 9941
TIME...MOT...LOC 2123Z 268DEG 8KT 4328 9921 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Weisser

1 follow-up statement

840 
WWUS53 KFSD 302142
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
442 PM CDT Sun Jun 30 2019

SDC053-302200-
/O.CON.KFSD.TO.W.0005.000000T0000Z-190630T2200Z/
Gregory SD-
442 PM CDT Sun Jun 30 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR
NORTHWESTERN GREGORY COUNTY...
    
At 438 PM CDT, a confirmed tornado was located near Gregory, or 27
miles east of Winner, and is nearly stationary.

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Weather spotters confirmed tornado.

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.

At 428 pm CDT...a tornado was reported 2.5 miles west of Lucas by 
local law enforcement.

This tornadic thunderstorm will remain over mainly rural areas of
northwestern Gregory County.

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 4333 9939 4340 9914 4321 9897 4321 9941
TIME...MOT...LOC 2138Z 266DEG 4KT 4326 9934 

TORNADO...OBSERVED
HAIL...1.00IN

$$

Weisser

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 4:25 PM CDT	Tornado Warning	FSD	Charles Mix, Douglas	35 min
Jun 30, 4:28 PM CDT	Tornado Warning	FSD	Charles Mix	32 min
Jun 30, 5:02 PM CDT	Tornado Warning Tornado observed	FSD	Gregory	28 min
Jun 30, 5:17 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	43 min
Jun 30, 5:27 PM CDT	Tornado Warning	FSD	Gregory	33 min
Jun 30, 5:58 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	47 min
Jun 30, 6:10 PM CDT	Tornado Warning	FSD	Gregory	35 min

Nearby

Tornado Warnings in South Dakota, 2019 Every tornado warning in 2019 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.