Alert archive / Minnesota / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 50, NWS Twin Cities, MN

June 20, 2019Watonwan County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 20, 2019, 6:46 PM CDT for Watonwan County, Minnesota. It was in force for 29 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, 6:46 PM CDT (23:46 UTC)
Expired: Jun 20, 2019, 7:15 PM CDT
In force: 29 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.5 in
Wind: 60.0 mph

County Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 129 km from the middle of the area, began a volume at 23:50 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 20, 7:09 PM CDT	HAIL 1.75	St. 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, 11.8 hours before the alert went out and 127 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: 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.

350 
WUUS53 KMPX 202346
SVRMPX
MNC165-210015-
/O.NEW.KMPX.SV.W.0050.190620T2346Z-190621T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
646 PM CDT Thu Jun 20 2019

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Watonwan County in south central Minnesota...

* Until 715 PM CDT.

* At 646 PM CDT, a severe thunderstorm was located 8 miles east of
  Comfrey, or 19 miles southwest of New Ulm, moving southeast at 30
  mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  St. James around 705 PM CDT.

Other locations impacted by this severe thunderstorm include
Sveadahl, St James Airport and Echols.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4411 9484 4411 9466 4393 9451 4387 9469
TIME...MOT...LOC 2346Z 315DEG 26KT 4410 9473 

TORNADO...POSSIBLE
HAIL...1.50IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 3:34 PM CDT	Special Weather Statement	MPX	Yellow Medicine	26 min
Jun 20, 3:40 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Yellow Medicine	35 min
Jun 20, 4:12 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	33 min
Jun 20, 4:45 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville, Yellow Medicine	45 min
Jun 20, 4:55 PM CDT	Special Weather Statement	MPX	Brown	50 min
Jun 20, 5:16 PM CDT	Tornado Warning	MPX	Redwood	29 min
Jun 20, 5:24 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	36 min
Jun 20, 5:37 PM CDT	Tornado Warning Tornado observed	MPX	Redwood	23 min
Jun 20, 5:55 PM CDT	Severe Thunderstorm Warning	MPX	Brown	50 min
Jun 20, 6:10 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	20 min
Jun 20, 6:27 PM CDT	Tornado Warning	MPX	Brown	33 min
Jun 20, 6:29 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Watonwan	46 min
Jun 20, 6:37 PM CDT	Areal Flood Warning	MPX	Brown, Redwood	3 hr
Jun 20, 6:43 PM CDT	Tornado Warning Tornado observed	MPX	Watonwan	32 min
Jun 20, 6:56 PM CDT	Tornado Warning	MPX	Watonwan	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2019 Every severe thunderstorm warning 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.