Alert archive / Minnesota / Tornado Warnings in 2019

Tornado Warning 10, NWS Twin Cities, MN

June 20, 2019Watonwan County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 20, 2019, 6:56 PM CDT for Watonwan County, Minnesota. It was in force for 34 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
Jun 20, 2019, 6:56 PM CDT (23:56 UTC)
Expired
Jun 20, 2019, 7:30 PM CDT
In force
34 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.75 in

County Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 134 km from the middle of the area, began a volume at 23:57 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

TimeReportWhereRemark
Jun 20, 7:09 PM CDTHAIL 1.75St. James, MN

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.9 hours before the alert went out and 133 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-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2019-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2019-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1592 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

235 
WFUS53 KMPX 202356
TORMPX
MNC165-210030-
/O.NEW.KMPX.TO.W.0010.190620T2356Z-190621T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
656 PM CDT Thu Jun 20 2019

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Western Watonwan County in south central Minnesota...

* Until 730 PM CDT.
    
* At 656 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near St. James, or 23 miles southwest of New Ulm,
  moving southeast at 30 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.

* This dangerous storm will be near...
  St. James around 705 PM CDT.

Other locations impacted by this tornadic thunderstorm include Echols
and South Branch.

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 4403 9482 4408 9467 4385 9447 4384 9465
      4384 9469
TIME...MOT...LOC 2356Z 323DEG 26KT 4402 9469 

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

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 3:34 PM CDTSpecial Weather StatementMPXYellow Medicine26 min
Jun 20, 3:40 PM CDTSevere Thunderstorm WarningMPXChippewa, Yellow Medicine35 min
Jun 20, 4:12 PM CDTSevere Thunderstorm WarningMPXYellow Medicine33 min
Jun 20, 4:45 PM CDTSevere Thunderstorm WarningMPXRedwood, Renville, Yellow Medicine45 min
Jun 20, 4:55 PM CDTSpecial Weather StatementMPXBrown50 min
Jun 20, 5:16 PM CDTTornado WarningMPXRedwood29 min
Jun 20, 5:24 PM CDTSevere Thunderstorm WarningMPXBrown, Redwood36 min
Jun 20, 5:37 PM CDTTornado Warning Tornado observedMPXRedwood23 min
Jun 20, 5:55 PM CDTSevere Thunderstorm WarningMPXBrown50 min
Jun 20, 6:10 PM CDTSevere Thunderstorm WarningMPXRedwood20 min
Jun 20, 6:27 PM CDTTornado WarningMPXBrown33 min
Jun 20, 6:29 PM CDTSevere Thunderstorm WarningMPXBrown, Watonwan46 min
Jun 20, 6:37 PM CDTAreal Flood WarningMPXBrown, Redwood3 hr
Jun 20, 6:43 PM CDTTornado Warning Tornado observedMPXWatonwan32 min
Jun 20, 6:46 PM CDTSevere Thunderstorm WarningMPXWatonwan29 min

Nearby

Tornado Warnings in Minnesota, 2019Every tornado warning in 2019Tornadoes 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.