Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 45, NWS Twin Cities, MN

July 11, 20204 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 11, 2020, 1:05 PM CDT for 4 counties in Minnesota. It was in force for 55 min. 3 reports 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
Jul 11, 2020, 1:05 PM CDT (18:05 UTC)
Expired
Jul 11, 2020, 2:00 PM CDT
In force
55 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.25 in
Wind
70.0 mph

Counties McLeod County, MN, Meeker County, MN, Renville County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 92 km from the middle of the area, began a volume at 18:09 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
Jul 11, 1:30 PM CDTHAIL 1.754 N Hector, MN
Jul 11, 1:43 PM CDTHAIL 22 N Hector, MN
Jul 11, 2:06 PM CDTHAIL 2.53 Ssw Stewart, 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, 6.1 hours before the alert went out and 89 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 2020-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 52 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, Minneapolis, MN at 12:00Z on 2020-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 square meters per square second.193958Sfc1 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
52 J/kg
Mixed-layer CIN
-178 J/kg
Mixed-layer LCL
1331 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
69 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

520 
WUUS53 KMPX 111805
SVRMPX
MNC085-093-129-143-111900-
/O.NEW.KMPX.SV.W.0045.200711T1805Z-200711T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
105 PM CDT Sat Jul 11 2020

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Southwestern Meeker County in central Minnesota...
  Northwestern Sibley County in central Minnesota...
  West central McLeod County in central Minnesota...
  Northeastern Renville County in central Minnesota...

* Until 200 PM CDT.

* At 105 PM CDT, a severe thunderstorm was located 7 miles west of
  Cosmos, or 16 miles southeast of Willmar, moving southeast at 35
  mph.

  HAZARD...70 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Hutchinson, Hector, Bird Island, Buffalo Lake, Stewart, Cosmos,
  Lakeside, Corvuso, Hutchinson Airport and Cedar Mills.

This includes U.S. Highway 212 between mile markers 81 and 103.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in The Twin Cities.

&&

LAT...LON 4480 9496 4490 9477 4506 9475 4485 9432
      4457 9464
TIME...MOT...LOC 1805Z 306DEG 31KT 4494 9485 

HAIL...1.25IN
WIND...70MPH
 
$$

CTG
3 follow-up statements
438 
WWUS53 KMPX 111812
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
112 PM CDT Sat Jul 11 2020

MNC085-093-129-143-111900-
/O.CON.KMPX.SV.W.0045.000000T0000Z-200711T1900Z/
Meeker MN-Sibley MN-McLeod MN-Renville MN-
112 PM CDT Sat Jul 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR SOUTHWESTERN MEEKER...NORTHWESTERN SIBLEY...WEST CENTRAL MCLEOD
AND NORTHEASTERN RENVILLE COUNTIES...

At 111 PM CDT, a severe thunderstorm was located near Cosmos, or 19
miles west of Hutchinson, moving southeast at 35 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Law enforcement reported ping pong ball size hail in Lake 
         Lillian at 108 PM CDT.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Hutchinson, Hector, Bird Island, Buffalo Lake, Stewart, Cosmos,
Lakeside, Corvuso, Hutchinson Airport and Cedar Mills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
The Twin Cities.

&&

LAT...LON 4480 9496 4490 9477 4506 9475 4485 9432
      4457 9464
TIME...MOT...LOC 1811Z 306DEG 31KT 4490 9478 

HAIL...1.50IN
WIND...70MPH
 
$$

CTG
715 
WWUS53 KMPX 111841
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
141 PM CDT Sat Jul 11 2020

MNC093-111850-
/O.CAN.KMPX.SV.W.0045.000000T0000Z-200711T1900Z/
Meeker MN-
141 PM CDT Sat Jul 11 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MEEKER COUNTY 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 800 PM CDT for
central Minnesota.

LAT...LON 4472 9485 4489 9470 4489 9440 4485 9432
      4457 9464
TIME...MOT...LOC 1840Z 306DEG 31KT 4475 9449 

$$

MNC085-129-143-111900-
/O.CON.KMPX.SV.W.0045.000000T0000Z-200711T1900Z/
Sibley MN-McLeod MN-Renville MN-
141 PM CDT Sat Jul 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR NORTHWESTERN SIBLEY...WEST CENTRAL MCLEOD AND NORTHEASTERN
RENVILLE COUNTIES...

At 140 PM CDT, a severe thunderstorm was located over Stewart, or 11
miles southwest of Hutchinson, moving southeast at 35 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Law enforcement.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Hutchinson, Hector, Buffalo Lake, Stewart, Lakeside and Hutchinson
Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
The Twin Cities.

&&

LAT...LON 4472 9485 4489 9470 4489 9440 4485 9432
      4457 9464
TIME...MOT...LOC 1840Z 306DEG 31KT 4475 9449 

HAIL...1.50IN
WIND...70MPH
 
$$

CTG
456 
WWUS53 KMPX 111852
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
152 PM CDT Sat Jul 11 2020

MNC085-129-143-111900-
/O.CON.KMPX.SV.W.0045.000000T0000Z-200711T1900Z/
Sibley MN-McLeod MN-Renville MN-
152 PM CDT Sat Jul 11 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM CDT
FOR NORTHWESTERN SIBLEY...WEST CENTRAL MCLEOD AND EAST CENTRAL
RENVILLE COUNTIES...

At 152 PM CDT, a severe thunderstorm was located near Brownton, or 14
miles south of Hutchinson, moving southeast at 35 mph.

HAZARD...Two inch hail and 70 mph wind gusts.

SOURCE...Law enforcement.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Hutchinson, Buffalo Lake, Stewart and Hutchinson Airport. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
The Twin Cities.

&&

LAT...LON 4466 9477 4489 9448 4489 9441 4485 9432
      4457 9464
TIME...MOT...LOC 1852Z 306DEG 31KT 4469 9437 

HAIL...2.00IN
WIND...70MPH
 
$$

CTG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 5:32 AM CDTSevere Thunderstorm WarningMPXSteele28 min
Jul 11, 10:43 AM CDTSpecial Weather StatementMPXDouglas, Pope, Stevens47 min
Jul 11, 11:17 AM CDTSevere Thunderstorm WarningMPXSwift43 min
Jul 11, 11:34 AM CDTSpecial Weather StatementMPXTodd56 min
Jul 11, 12:00 PM CDTSpecial Weather StatementMPXKandiyohi45 min
Jul 11, 12:32 PM CDTSevere Thunderstorm WarningMPXKandiyohi, Renville58 min
Jul 11, 12:39 PM CDTSpecial Weather StatementMPXMeeker51 min
Jul 11, 12:57 PM CDTSpecial Weather StatementMPXTodd33 min
Jul 11, 1:20 PM CDTSevere Thunderstorm WarningMPXChippewa, Redwood, Renville, Yellow Medicine40 min
Jul 11, 1:28 PM CDTSevere Thunderstorm WarningMPXRedwood47 min
Jul 11, 1:48 PM CDTSevere Thunderstorm WarningMPXMcLeod, Sibley57 min
Jul 11, 2:01 PM CDTSpecial Weather StatementMPXPope44 min
Jul 11, 2:15 PM CDTSevere Thunderstorm WarningMPXPope45 min
Jul 11, 2:20 PM CDTSevere Thunderstorm WarningMPXMartin40 min
Jul 11, 2:23 PM CDTSevere Thunderstorm WarningMPXNicollet, Sibley52 min
Jul 11, 2:42 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet33 min
Jul 11, 2:57 PM CDTSevere Thunderstorm WarningMPXMartin, Watonwan48 min
Jul 11, 3:03 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Le Sueur, Nicollet42 min
Jul 11, 3:10 PM CDTTornado WarningMPXBlue Earth, Nicollet20 min
Jul 11, 3:26 PM CDTSevere Thunderstorm WarningMPXFaribault, Martin49 min
Jul 11, 3:32 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Freeborn, Steele, Waseca43 min
Jul 11, 4:05 PM CDTSevere Thunderstorm WarningMPXFreeborn, Steele, Waseca55 min
Jul 11, 4:17 PM CDTSpecial Weather StatementMPXFaribault58 min
Jul 11, 4:35 PM CDTSevere Thunderstorm WarningMPXFaribault, Freeborn25 min
Jul 11, 6:16 PM CDTSpecial Weather StatementMPXHennepin59 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2020Every severe thunderstorm warning in 2020

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.