Alert archive / Minnesota / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 64, NWS Twin Cities, MN

June 6, 20186 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 6, 2018, 4:34 AM CDT for 6 counties in Minnesota. It was in force for 41 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
Jun 6, 2018, 4:34 AM CDT (09:34 UTC)
Expired
Jun 6, 2018, 5:15 AM CDT
In force
41 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Blue Earth County, MN, Brown County, MN, Le Sueur County, MN, Nicollet County, MN, Sibley County, MN, Watonwan County, MN

The radar

The Minneapolis radar (KMPX), 76 km from the middle of the area, began a volume at 09:37 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

Minneapolis, MN (KMPX), launched 00:00Z, 9.6 hours before the alert went out and 74 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 00:00Z on 2018-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2018-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1959 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

188 
WUUS53 KMPX 060934
SVRMPX
MNC013-015-079-103-143-165-061015-
/O.NEW.KMPX.SV.W.0064.180606T0934Z-180606T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
434 AM CDT WED JUN 6 2018

The National Weather Service in The Twin Cities has issued a

* Severe Thunderstorm Warning for...
  Central Le Sueur County in south central Minnesota...
  Southeastern Sibley County in central Minnesota...
  Southeastern Brown County in south central Minnesota...
  Blue Earth County in south central Minnesota...
  Northern Watonwan County in south central Minnesota...
  Nicollet County in south central Minnesota...

* Until 515 AM CDT

* At 433 AM CDT, severe thunderstorms were located along a line
  extending from near Winthrop to near New Ulm to near St. James,
  moving east at 50 mph.

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

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near,
  Gaylord around 440 AM CDT. 
  Arlington and Nicollet around 445 AM CDT. 
  Lewisville around 450 AM CDT. 
  Le Sueur and Henderson around 455 AM CDT. 
  Mankato, St. Peter and Kasota around 500 AM CDT. 

Other locations impacted by these severe thunderstorms include 
Klossner, Skyline, St Thomas, Rush River, Lake Jefferson, Garden 
City, St Henry and Norseland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4395 9484 4432 9449 4462 9437 4459 9389
      4456 9390 4455 9389 4454 9362 4417 9377
      4389 9403
TIME...MOT...LOC 0933Z 287DEG 44KT 4455 9430 4431 9440 4404 9465 

HAIL...0.75IN
WIND...60MPH
 
$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 1:54 AM CDTSpecial Weather StatementMPXDouglas, Stevens, Todd66 min
Jun 6, 2:09 AM CDTSevere Thunderstorm WarningMPXDouglas, Todd51 min
Jun 6, 2:18 AM CDTSevere Thunderstorm WarningMPXPope, Stevens, Swift57 min
Jun 6, 2:20 AM CDTSevere Thunderstorm WarningMPXChippewa, Lac qui Parle, Yellow Medicine55 min
Jun 6, 3:11 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Pope, Stearns, Swift34 min
Jun 6, 3:35 AM CDTSevere Thunderstorm WarningMPXKandiyohi, Meeker, Renville25 min
Jun 6, 3:42 AM CDTSevere Thunderstorm WarningMPXMeeker, Stearns33 min
Jun 6, 3:57 AM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Renville, Sibley, Wright48 min
Jun 6, 4:50 AM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault, Martin, Watonwan25 min
Jun 6, 5:02 AM CDTSpecial Weather StatementMPXDakota, Hennepin, Ramsey, Scott, Washington43 min
Jun 6, 5:24 AM CDTSpecial Weather StatementMPXFaribault, Freeborn, Steele, Waseca66 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2018Every 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.