Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 181, NWS Twin Cities, MN

August 18, 2017Lac qui Parle County, Yellow Medicine County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 2017, 4:44 PM CDT for Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 31 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: Aug 18, 2017, 4:44 PM CDT (21:44 UTC)
Expired: Aug 18, 2017, 5:15 PM CDT
In force: 31 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Lac qui Parle County, MN, Yellow Medicine County, MN

The radar

The Sioux Falls radar (KFSD), 139 km from the middle of the area, began a volume at 21:43 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 12:00Z, 9.7 hours before the alert went out and 163 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: 114 J/kg
Mixed-layer CIN: -290 J/kg
Mixed-layer LCL: 1289 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

246 
WUUS53 KMPX 182144
SVRMPX
MNC073-173-182215-
/O.NEW.KMPX.SV.W.0181.170818T2144Z-170818T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
444 PM CDT FRI AUG 18 2017

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lac qui Parle County in west central Minnesota...
  West central Yellow Medicine County in west central Minnesota...

* Until 515 PM CDT

* At 444 PM CDT, a severe thunderstorm was located over Gary, or 13
  miles east of Clear Lake, moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will be near,
  Canby around 510 PM CDT. 

Other locations impacted by this severe thunderstorm include Burr,
Florida Creek Wildlife Management Area and Providence.

This includes the following highways...
 U.S. Highway 212 between mile markers 4 and 21.
 U.S. Highway 75 between mile markers 95 and 107.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4487 9645 4502 9629 4494 9602 4463 9626
      4463 9640 4466 9646
TIME...MOT...LOC 2144Z 279DEG 16KT 4481 9640 

HAIL...1.00IN
WIND...60MPH
 
$$
AMK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 3:54 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle	51 min
Aug 18, 4:18 PM CDT	Special Weather Statement	MPX	Lac qui Parle	27 min
Aug 18, 4:55 PM CDT	Special Weather Statement	MPX	Redwood	35 min
Aug 18, 5:07 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Yellow Medicine	38 min
Aug 18, 5:09 PM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	25 min
Aug 18, 5:30 PM CDT	Special Weather Statement	MPX	Redwood	30 min
Aug 18, 5:53 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	37 min
Aug 18, 6:00 PM CDT	Flash Flood Warning	MPX	Redwood, Yellow Medicine	4 hr
Aug 18, 6:15 PM CDT	Severe Thunderstorm Warning	MPX	Redwood	30 min
Aug 18, 6:37 PM CDT	Severe Thunderstorm Warning	MPX	Brown	23 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017 Every severe thunderstorm warning in 2017

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.