Alert archive / South Dakota / Tornado Warnings in 2019

Tornado Warning 17, NWS Sioux Falls, SD

July 28, 2019Charles Mix County, Gregory County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 28, 2019, 8:54 PM CDT for Charles Mix County, Gregory County, South Dakota. It was in force for 21 min. 1 report 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: Jul 28, 2019, 8:54 PM CDT (01:54 UTC)
Expired: Jul 28, 2019, 9:15 PM CDT
In force: 21 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

Counties Charles Mix County, SD, Gregory County, SD

The radar

The Sioux Falls radar (KFSD), 160 km from the middle of the area, began a volume at 01:57 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
Jul 28, 9:02 PM CDT	TSTM WND DMG	2 Nw Pickstown, SD	NUMEROUS BROKEN TREE BRANCHES UP TO SIX INCHES IN DIAMETER.

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
Jul 28, 7:27 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.9 hours before the alert went out and 208 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: 1466 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -138 m²/s²
0-3 km storm-relative helicity: -66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

961 
WFUS53 KFSD 290154
TORFSD
SDC023-053-290230-
/O.NEW.KFSD.TO.W.0017.190729T0154Z-190729T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
854 PM CDT Sun Jul 28 2019

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Central Charles Mix County in south central South Dakota...
  Southeastern Gregory County in south central South Dakota...

* Until 930 PM CDT.

* At 853 PM CDT, a confirmed tornado was located approximately 3 
  miles west of Lake Andes, moving southeast at 40 mph.

  HAZARD...Damaging tornado.

  SOURCE...Law enforcement 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.

* The tornado will be near...
  Lake Andes around 905 PM CDT.
  Pickstown around 910 PM CDT.
  Marty around 920 PM CDT.

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 4295 9847 4300 9850 4300 9865 4314 9885
      4323 9872 4307 9828 4293 9844
TIME...MOT...LOC 0153Z 308DEG 35KT 4315 9872 

TORNADO...OBSERVED
HAIL...<.75IN

$$

JM

2 follow-up statements

416 
WWUS53 KFSD 290211
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
911 PM CDT Sun Jul 28 2019

SDC023-053-290230-
/O.CON.KFSD.TO.W.0017.000000T0000Z-190729T0230Z/
Charles Mix SD-Gregory SD-
911 PM CDT Sun Jul 28 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR
SOUTHEASTERN CHARLES MIX AND SOUTHEASTERN GREGORY COUNTIES...
    
At 910 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Pickstown, moving southeast at 40 mph.

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 dangerous storm will be near...
  Marty around 920 PM CDT.

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 4295 9847 4300 9850 4300 9865 4306 9872
      4318 9859 4307 9828 4293 9844
TIME...MOT...LOC 0210Z 308DEG 35KT 4304 9853 

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

$$

JM

813 
WWUS53 KFSD 290215
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
915 PM CDT Sun Jul 28 2019

SDC023-053-290224-
/O.CAN.KFSD.TO.W.0017.000000T0000Z-190729T0230Z/
Charles Mix SD-Gregory SD-
915 PM CDT Sun Jul 28 2019

...THE TORNADO WARNING FOR SOUTHEASTERN CHARLES MIX AND SOUTHEASTERN
GREGORY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
south central South Dakota.

LAT...LON 4295 9847 4300 9850 4300 9865 4306 9872
      4318 9859 4307 9828 4293 9844
TIME...MOT...LOC 0213Z 308DEG 35KT 4301 9848 

$$

JM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 7:13 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld, Kingsbury, Miner, Sanborn	47 min
Jul 28, 7:31 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Davison, Jerauld, Sanborn	44 min
Jul 28, 7:47 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, Lake, McCook, Miner and 2 more	43 min
Jul 28, 8:05 PM CDT	Severe Thunderstorm Warning	FSD	Kingsbury, Lake, McCook, Minnehaha, Moody	40 min
Jul 28, 8:12 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Charles Mix, Davison, Douglas	48 min
Jul 28, 8:21 PM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson, Hutchinson, Lincoln, McCook, Minnehaha and 1 more	39 min
Jul 28, 8:38 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha, Moody	37 min
Jul 28, 8:51 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	39 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.