Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 141, NWS Twin Cities, MN

June 10, 20124 counties in Minnesota; Polk County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 10, 2012, 9:29 PM CDT for 4 counties in Minnesota; Polk County, Saint Croix County, Wisconsin. It was in force for 61 min. 1 report 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
Jun 10, 2012, 9:29 PM CDT (02:29 UTC)
Expired
Jun 10, 2012, 10:30 PM CDT
In force
61 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
65.0 mph

Counties Anoka County, MN, Chisago County, MN, Isanti County, MN, Washington County, MN, Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 102 km from the middle of the area, began a volume at 02:32 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
Jun 10, 9:45 PM CDTTSTM WND DMGOsceola, WIPOWER POLES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 10, 3:03 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.5 hours before the alert went out and 104 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 2012-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 282 joules per kilogram.LCLLFCEL10008507005003002001001 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 2012-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 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
282 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
2269 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

366 
WUUS53 KMPX 110229
SVRMPX
MNC003-025-059-163-WIC095-109-110330-
/O.NEW.KMPX.SV.W.0141.120611T0229Z-120611T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
929 PM CDT SUN JUN 10 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHEASTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  POLK COUNTY IN NORTHWEST WISCONSIN...
  NORTHWESTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1030 PM CDT

* AT 927 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM WYOMING TO MARINE ON ST CROIX
  TO BAYPORT...AND MOVING NORTHEAST AT 55 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  FOREST LAKE...
  NORTH BRANCH...
  NEW RICHMOND...
  AMERY...
  BALSAM LAKE...
  WYOMING...
  BAYPORT...
  BURKHARDT...
  STILLWATER...
  HUDSON...
  LAKELAND...
  LAKE ELMO...
  MARINE ON ST CROIX...
  SCANDIA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4572 9215 4536 9215 4494 9264 4492 9295
      4512 9290 4533 9319 4573 9311 4573 9286
      4565 9287 4565 9254 4574 9252 4574 9216
TIME...MOT...LOC 0229Z 217DEG 46KT 4536 9296 4523 9278
          4506 9273
WIND...HAIL 65MPH <.75IN

$$

JPC
2 follow-up statements
162 
WWUS53 KMPX 110252
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
952 PM CDT SUN JUN 10 2012

MNC003-059-110307-
/O.CAN.KMPX.SV.W.0141.000000T0000Z-120611T0330Z/
ANOKA MN-ISANTI MN-
952 PM CDT SUN JUN 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ISANTI AND
NORTHEASTERN ANOKA COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4573 9216 4535 9216 4505 9251 4512 9289
      4516 9296 4531 9302 4555 9303 4556 9308
      4573 9311 4573 9286 4565 9287 4565 9254
      4574 9252
TIME...MOT...LOC 0252Z 220DEG 51KT 4569 9286 4555 9256
          4534 9243

$$

MNC025-163-WIC095-109-110330-
/O.CON.KMPX.SV.W.0141.000000T0000Z-120611T0330Z/
CHISAGO MN-WASHINGTON MN-ST. CROIX WI-POLK WI-
952 PM CDT SUN JUN 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR POLK...
NORTHWESTERN ST. CROIX...NORTHERN WASHINGTON AND CHISAGO COUNTIES
UNTIL 1030 PM CDT...

AT 950 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH. 
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM RUSH CITY TO
CUSHING TO WANDEROOS...MOVING NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  BALSAM LAKE...MILLTOWN...LUCK...RANGE...FREDERIC...LEWIS...CLAM
  FALLS...MCKINLEY AND JOEL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4573 9216 4535 9216 4505 9251 4512 9289
      4516 9296 4531 9302 4555 9303 4556 9308
      4573 9311 4573 9286 4565 9287 4565 9254
      4574 9252
TIME...MOT...LOC 0252Z 220DEG 51KT 4569 9286 4555 9256
          4534 9243
WIND...HAIL 60MPH <.75IN

$$

JPC
747 
WWUS53 KMPX 110325
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1025 PM CDT SUN JUN 10 2012

MNC025-163-WIC095-109-110340-
/O.EXP.KMPX.SV.W.0141.000000T0000Z-120611T0330Z/
CHISAGO MN-WASHINGTON MN-ST. CROIX WI-POLK WI-
1025 PM CDT SUN JUN 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR POLK...NORTHWESTERN ST.
CROIX...NORTHERN WASHINGTON AND CHISAGO COUNTIES WILL EXPIRE AT 1030
PM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 4573 9216 4535 9216 4505 9251 4512 9289
      4516 9296 4531 9302 4555 9303 4556 9308
      4573 9311 4573 9286 4565 9287 4565 9254
      4574 9252
TIME...MOT...LOC 0325Z 220DEG 51KT 4603 9239 4589 9210
          4568 9197

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 7:07 PM CDTSpecial Weather StatementMPXLe Sueur, Nicollet, Scott, Sibley53 min
Jun 10, 7:35 PM CDTSpecial Weather StatementMPXAnoka, Chisago, Hennepin, Isanti, Kanabec, Ramsey55 min
Jun 10, 7:35 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Le Sueur, Nicollet40 min
Jun 10, 7:41 PM CDTSevere Thunderstorm WarningMPXCarver, Hennepin, Scott49 min
Jun 10, 7:54 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Hennepin, Isanti36 min
Jun 10, 7:55 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Nicollet, Scott, Sibley50 min
Jun 10, 7:59 PM CDTSevere Thunderstorm WarningMPXCarver, McLeod, Wright46 min
Jun 10, 8:18 PM CDTTornado WarningMPXCarver, Le Sueur, Scott, Sibley42 min
Jun 10, 8:29 PM CDTSevere Thunderstorm WarningMPXLe Sueur, Scott, Steele45 min
Jun 10, 8:32 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Hennepin, Isanti, Ramsey, Washington58 min
Jun 10, 8:39 PM CDTSevere Thunderstorm WarningMPXCarver, Sibley36 min
Jun 10, 8:42 PM CDTSevere Thunderstorm WarningMPXDakota, Rice63 min
Jun 10, 8:48 PM CDTSevere Thunderstorm WarningMPXFreeborn, Steele, Waseca36 min
Jun 10, 8:50 PM CDTSpecial Weather StatementMPXIsanti40 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012

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.