Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 3, NWS Twin Cities, MN

April 30, 2018Lac qui Parle County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 30, 2018, 11:54 PM CDT for Lac qui Parle County, Minnesota. It was in force for 53 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: Apr 30, 2018, 11:54 PM CDT (04:54 UTC)
Expired: May 1, 2018, 12:47 AM CDT
In force: 53 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Lac qui Parle County, MN

The radar

The Aberdeen radar (KABR), 168 km from the middle of the area, began a volume at 04:55 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 4.9 hours before the alert went out and 167 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: 164 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 2057 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

522 
WUUS53 KMPX 010454
SVRMPX
MNC073-010600-
/O.NEW.KMPX.SV.W.0003.180501T0454Z-180501T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1154 PM CDT MON APR 30 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Lac qui Parle County in west central Minnesota...

* Until 100 AM CDT

* At 1153 PM CDT, high winds associated with decaying thunderstorms 
  were located across western Lac qui Parle county, and are nearly 
  stationary.

  HAZARD...60 mph wind gusts. 

  SOURCE...Trained weather spotters. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Madison, Dawson, Bellingham, Marietta, Nassau, Louisburg, Big Stone
  National Wildlife Refuge, Madison Airport and Florida Creek
  Wildlife Management Area.

This includes the following highways...
 U.S. Highway 212 between mile markers 1 and 19.
 U.S. Highway 75 between mile markers 99 and 127.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Wind damage with these storms may occur before any rain or 
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 4527 9645 4527 9642 4525 9640 4526 9638
      4525 9629 4522 9627 4522 9622 4519 9617
      4518 9611 4486 9604 4484 9645
TIME...MOT...LOC 0453Z 271DEG 1KT 4512 9624 4491 9623 

HAIL...<.75IN
WIND...60MPH
 
$$

BORGHOFF

1 follow-up statement

797 
WWUS53 KMPX 010547
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1247 AM CDT TUE MAY 1 2018

MNC073-010556-
/O.CAN.KMPX.SV.W.0003.000000T0000Z-180501T0600Z/
Lac qui Parle MN-
1247 AM CDT TUE MAY 1 2018

...THE SEVERE THUNDERSTORM WARNING FOR LAC QUI PARLE COUNTY IS
CANCELLED...
            
The strong winds which prompted the warning have weakened below 
severe limits, and no longer pose an immediate threat to life or 
property. Therefore the warning has been cancelled.  However gusty 
winds are still possible during the next couple hours.

LAT...LON 4527 9645 4527 9642 4525 9640 4526 9638
      4525 9629 4522 9627 4522 9622 4519 9617
      4518 9611 4486 9604 4484 9645
TIME...MOT...LOC 0544Z 271DEG 1KT 4512 9622 4491 9621 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 12:17 AM CDT	Special Weather Statement	MPX	Lac qui Parle, Stevens, Swift, Yellow Medicine	58 min
May 1, 5:27 PM CDT	Special Weather Statement	MPX	Freeborn	48 min
May 1, 5:53 PM CDT	Special Weather Statement	MPX	Freeborn	37 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018 Every severe thunderstorm warning in 2018

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.