Alert archive / Minnesota / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 182, NWS Twin Cities, MN

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

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 18, 2017, 5:07 PM CDT for Chippewa County, Lac qui Parle County, Yellow Medicine County, Minnesota. It was in force for 38 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, 5:07 PM CDT (22:07 UTC)
Expired
Aug 18, 2017, 5:45 PM CDT
In force
38 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

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

The radar

The Sioux Falls radar (KFSD), 148 km from the middle of the area, began a volume at 22:10 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.

IssuedProductOfficeLasted
Aug 18, 4:51 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 10.1 hours before the alert went out and 189 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, Aberdeen, SD at 12:00Z on 2017-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Aberdeen, SD at 12:00Z on 2017-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.1939Sfc1 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
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.

420 
WUUS53 KMPX 182207
SVRMPX
MNC023-073-173-182245-
/O.NEW.KMPX.SV.W.0182.170818T2207Z-170818T2245Z/

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

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southeastern Lac qui Parle County in west central Minnesota...
  South central Chippewa County in west central Minnesota...
  Yellow Medicine County in west central Minnesota...

* Until 545 PM CDT

* At 506 PM CDT, a severe thunderstorm was located near St. Leo, or
  24 miles southwest of Montevideo, moving east at 30 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,
  Clarkfield around 530 PM CDT. 

Other locations impacted by this severe thunderstorm include Spring
Creek, Providence, Spellman Lake, St. Leo and Hazel Run.

This includes the following highways...
 U.S. Highway 212 between mile markers 12 and 21, and between mile
markers 39 and 47.
 U.S. Highway 75 between mile markers 95 and 104.
 U.S. Highway 59 between mile markers 87 and 106.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4495 9620 4490 9552 4463 9568 4463 9641
TIME...MOT...LOC 2206Z 286DEG 27KT 4474 9612 

HAIL...1.00IN
WIND...60MPH
 
$$
AMK
2 follow-up statements
549 
WWUS53 KMPX 182238
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
538 PM CDT FRI AUG 18 2017

MNC023-073-182248-
/O.CAN.KMPX.SV.W.0182.000000T0000Z-170818T2245Z/
Lac qui Parle MN-Chippewa MN-
538 PM CDT FRI AUG 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LAC QUI PARLE AND
SOUTH CENTRAL CHIPPEWA COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until 100 AM CDT for
west central Minnesota.

LAT...LON 4480 9605 4481 9603 4472 9563 4463 9568
      4463 9608
TIME...MOT...LOC 2238Z 286DEG 27KT 4467 9580 

$$

MNC173-182245-
/O.CON.KMPX.SV.W.0182.000000T0000Z-170818T2245Z/
Yellow Medicine MN-
538 PM CDT FRI AUG 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR CENTRAL YELLOW MEDICINE COUNTY...

At 538 PM CDT, a severe thunderstorm was located over Spellman Lake,
or 15 miles north of Marshall, moving east at 30 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 remain over mainly rural areas of
central Yellow Medicine County, including the following locations:
Spellman Lake, St. Leo and Spring Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4480 9605 4481 9603 4472 9563 4463 9568
      4463 9608
TIME...MOT...LOC 2238Z 286DEG 27KT 4467 9580 

HAIL...1.00IN
WIND...60MPH
 
$$
AMK
622 
WWUS53 KMPX 182245
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
545 PM CDT FRI AUG 18 2017

MNC173-182255-
/O.EXP.KMPX.SV.W.0182.000000T0000Z-170818T2245Z/
Yellow Medicine MN-
545 PM CDT FRI AUG 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL YELLOW MEDICINE COUNTY
HAS EXPIRED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been allowed to expire.

A severe thunderstorm watch remains in effect until 100 AM CDT for
west central Minnesota.

LAT...LON 4480 9605 4481 9603 4472 9563 4463 9568
      4463 9608
TIME...MOT...LOC 2245Z 286DEG 27KT 4466 9574 

$$
AMK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 3:54 PM CDTSevere Thunderstorm WarningMPXLac qui Parle51 min
Aug 18, 4:18 PM CDTSpecial Weather StatementMPXLac qui Parle27 min
Aug 18, 4:44 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine31 min
Aug 18, 4:55 PM CDTSpecial Weather StatementMPXRedwood35 min
Aug 18, 5:09 PM CDTSevere Thunderstorm WarningMPXLac qui Parle, Yellow Medicine25 min
Aug 18, 5:30 PM CDTSpecial Weather StatementMPXRedwood30 min
Aug 18, 5:53 PM CDTSevere Thunderstorm WarningMPXRedwood, Renville37 min
Aug 18, 6:00 PM CDTFlash Flood WarningMPXRedwood, Yellow Medicine4 hr
Aug 18, 6:15 PM CDTSevere Thunderstorm WarningMPXRedwood30 min
Aug 18, 6:37 PM CDTSevere Thunderstorm WarningMPXBrown23 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2017Every 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.