Alert archive / Minnesota / Tornado Warnings in 2019

Tornado Warning 15, NWS Sioux Falls, SD

July 18, 2019Jackson County, Minnesota

NWS Sioux Falls, SD issued this tornado warning at Jul 18, 2019, 5:43 PM CDT for Jackson County, Minnesota. It was in force for 32 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: Jul 18, 2019, 5:43 PM CDT (22:43 UTC)
Expired: Jul 18, 2019, 6:15 PM CDT
In force: 32 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Jackson County, MN

The radar

The Sioux Falls radar (KFSD), 118 km from the middle of the area, began a volume at 22:45 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 18, 5:30 PM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.7 hours before the alert went out and 190 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: 686 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 845 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

236 
WFUS53 KFSD 182243
TORFSD
MNC063-182315-
/O.NEW.KFSD.TO.W.0015.190718T2243Z-190718T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
543 PM CDT Thu Jul 18 2019

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Western Jackson County in southwestern Minnesota...

* Until 615 PM CDT.
    
* At 543 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Brewster, or 10 miles east of Worthington, moving
  east at 15 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.

* This dangerous storm will be near...
  Lakefield around 615 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Okabena.

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 4358 9504 4352 9544 4356 9546 4372 9545
      4383 9516
TIME...MOT...LOC 2243Z 250DEG 14KT 4364 9538 

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

$$

BT

2 follow-up statements

035 
WWUS53 KFSD 182300
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
600 PM CDT Thu Jul 18 2019

MNC063-182315-
/O.CON.KFSD.TO.W.0015.000000T0000Z-190718T2315Z/
Jackson MN-
600 PM CDT Thu Jul 18 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
NORTHWESTERN JACKSON COUNTY...
    
At 558 PM CDT, a severe thunderstorm capable of producing a tornado 
was located just east of Brewster, or 13 miles east of Worthington, 
moving northeast at 15 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...
  Okabena around 615 PM CDT.

The earlier rotation indicated on radar has weakened west of 
Lakefield, while a new rotation was developing southwest of Okabena.

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 4361 9505 4363 9538 4365 9545 4372 9545
      4383 9516
TIME...MOT...LOC 2258Z 242DEG 12KT 4367 9534 

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

$$

Chapman

347 
WWUS53 KFSD 182314
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
614 PM CDT Thu Jul 18 2019

MNC063-182323-
/O.EXP.KFSD.TO.W.0015.000000T0000Z-190718T2315Z/
Jackson MN-
614 PM CDT Thu Jul 18 2019

...THE TORNADO WARNING FOR NORTHWESTERN JACKSON COUNTY WILL EXPIRE AT
615 PM CDT...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until midnight CDT for southwestern
Minnesota.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sioux Falls.

LAT...LON 4361 9505 4363 9538 4365 9545 4372 9545
      4383 9516
TIME...MOT...LOC 2313Z 250DEG 14KT 4369 9527 

$$

Chapman

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 4:09 PM CDT	Heat Advisory	FSD	Cottonwood, Jackson, Lincoln, Nobles, Pipestone, Rock	28 hr

Nearby

Tornado Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.