Alert archive / Minnesota / Tornado Warnings in 2019

Tornado Warning 27, NWS Twin Cities, MN

July 18, 2019Waseca County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jul 18, 2019, 6:37 PM CDT for Waseca County, Minnesota. It was in force for 23 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, 6:37 PM CDT (23:37 UTC)
Expired: Jul 18, 2019, 7:00 PM CDT
In force: 23 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Waseca County, MN

The radar

The Minneapolis radar (KMPX), 89 km from the middle of the area, began a volume at 23:38 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, 11.6 hours before the alert went out and 89 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 KMPX 182337
TORMPX
MNC161-190000-
/O.NEW.KMPX.TO.W.0027.190718T2337Z-190719T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
637 PM CDT Thu Jul 18 2019

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Northern And Central Waseca County in south central Minnesota...

* Until 700 PM CDT.
    
* At 636 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Waldorf, or 19 miles southeast of Mankato, moving
  northeast at 35 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...
  Waseca around 650 PM CDT.

Other locations impacted by this tornadic thunderstorm include Waseca
Airport.

This includes U.S. Highway 14 between mile markers 155 and 163.
 
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 4397 9369 4401 9372 4419 9341 4410 9340
      4407 9341
TIME...MOT...LOC 2336Z 236DEG 31KT 4401 9367 

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

$$

TDK

2 follow-up statements

556 
WWUS53 KMPX 182350
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
650 PM CDT Thu Jul 18 2019

MNC161-190000-
/O.CON.KMPX.TO.W.0027.000000T0000Z-190719T0000Z/
Waseca MN-
650 PM CDT Thu Jul 18 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR
NORTHEASTERN WASECA COUNTY...
    
At 648 PM CDT, a severe thunderstorm capable of producing a tornado 
was located over Waseca, or 16 miles west of Owatonna, moving 
northeast at 35 mph. Storm spotters reported a funnel cloud over 
Waseca at 636 PM

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
northeastern Waseca County, including the following locations...
Waseca Airport.

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 4401 9359 4406 9363 4419 9341 4410 9340
      4407 9341
TIME...MOT...LOC 2348Z 236DEG 31KT 4407 9355 

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

$$

ETA

538 
WWUS53 KMPX 190002
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
702 PM CDT Thu Jul 18 2019

MNC161-190012-
/O.EXP.KMPX.TO.W.0027.000000T0000Z-190719T0000Z/
Waseca MN-
702 PM CDT Thu Jul 18 2019

...THE TORNADO WARNING FOR NORTHEASTERN WASECA COUNTY HAS EXPIRED...
                
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 allowed to expire.

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

LAT...LON 4401 9359 4406 9363 4419 9341 4410 9340
      4407 9341
TIME...MOT...LOC 0002Z 236DEG 31KT 4414 9342 

$$

BORGHOFF

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 2:04 AM CDT	Special Weather Statement	MPX	Faribault	41 min
Jul 18, 3:31 AM CDT	Special Weather Statement	MPX	Le Sueur	29 min
Jul 18, 4:11 AM CDT	Special Weather Statement	MPX	Dakota, Scott	34 min
Jul 18, 4:18 AM CDT	Special Weather Statement	MPX	Pope, Stevens	27 min
Jul 18, 4:28 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Scott	17 min
Jul 18, 4:44 AM CDT	Special Weather Statement	MPX	Pope	31 min
Jul 18, 4:50 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Pope, Stearns, Swift	25 min
Jul 18, 5:59 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Waseca	31 min
Jul 18, 6:35 PM CDT	Tornado Warning	MPX	Martin	25 min
Jul 18, 6:58 PM CDT	Tornado Warning	MPX	Faribault, Martin	32 min

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.