Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 137, NWS Twin Cities, MN

June 10, 20126 counties in Minnesota; Polk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jun 10, 2012, 8:32 PM CDT for 6 counties in Minnesota; Polk County, Wisconsin. It was in force for 58 min. 2 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
Jun 10, 2012, 8:32 PM CDT (01:32 UTC)
Expired
Jun 10, 2012, 9:30 PM CDT
In force
58 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, Hennepin County, MN, Isanti County, MN, Ramsey County, MN, Washington County, MN, Polk County, WI

The radar

The Minneapolis radar (KMPX), 51 km from the middle of the area, began a volume at 01:32 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, 9:00 PM CDTTSTM WND DMG2 Wsw St Paul, MNSCATTERED TREES DOWN...MOSTLY ACROSS CENTRAL AND EASTERN SECTIONS OF THE HIGHLAND PARK NEIGHBORHOOD. SOME TREES FELL ON VEHICLES.
Jun 10, 9:13 PM CDTTSTM WND DMGMahtomedi, MNTREES DOWN, POWER OUTAGES REPORTED IN THE AREA.

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, 1.5 hours before the alert went out and 53 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°0°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.

611 
WUUS53 KMPX 110132
SVRMPX
MNC003-025-053-059-123-163-WIC095-110230-
/O.NEW.KMPX.SV.W.0137.120611T0132Z-120611T0230Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN POLK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 930 PM CDT

* AT 827 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 RUSH CITY TO SHAKOPEE...AND
  MOVING NORTHEAST AT 45 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  PLYMOUTH...
  CAMBRIDGE...
  NORTH BRANCH...
  MINNEAPOLIS...
  ST PAUL...
  FOREST LAKE...
  HAM LAKE...
  OAK PARK...
  CRYSTAL...
  HARRIS...
  NEW HOPE...
  MEDICINE LAKE...
  BROOKLYN PARK...
  COON RAPIDS...

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 4493 9299 4490 9303 4492 9313 4481 9325
      4479 9331 4480 9352 4489 9352 4490 9362
      4573 9315 4573 9287 4565 9287 4565 9257
      4573 9251
TIME...MOT...LOC 0133Z 223DEG 41KT 4571 9288 4483 9348
WIND...HAIL 65MPH <.75IN

$$

JPC
2 follow-up statements
156 
WWUS53 KMPX 110156
SVSMPX

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

WIC095-110211-
/O.CAN.KMPX.SV.W.0137.000000T0000Z-120611T0230Z/
POLK WI-
856 PM CDT SUN JUN 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL POLK COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED 
AREA. THEREFORE...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL 
POLK COUNTY HAS BEEN CANCELLED.

LAT...LON 4544 9268 4493 9299 4490 9303 4492 9305
      4492 9314 4481 9325 4479 9331 4479 9341
      4481 9343 4481 9352 4489 9352 4490 9362
      4546 9331 4547 9268
TIME...MOT...LOC 0156Z 219DEG 50KT 4499 9327

$$

MNC003-025-053-059-123-163-110230-
/O.CON.KMPX.SV.W.0137.000000T0000Z-120611T0230Z/
ANOKA MN-CHISAGO MN-HENNEPIN MN-ISANTI MN-RAMSEY MN-WASHINGTON MN-
856 PM CDT SUN JUN 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...RAMSEY...SOUTHEASTERN ISANTI...HENNEPIN...SOUTHERN
CHISAGO AND ANOKA COUNTIES UNTIL 930 PM CDT...

AT 855 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH.  THIS
STORM WAS LOCATED NEAR MINNEAPOLIS...MOVING NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  ST PAUL...FOREST LAKE...LAUDERDALE...FALCON HEIGHTS...BROOKLYN
  CENTER...OSSEO...COLUMBIA HEIGHTS...BROOKLYN PARK...HILLTOP...
  ROSEVILLE...FRIDLEY...CHAMPLIN...NEW BRIGHTON...ARDEN HILLS AND
  SPRING LAKE PARK.

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 4544 9268 4493 9299 4490 9303 4492 9305
      4492 9314 4481 9325 4479 9331 4479 9341
      4481 9343 4481 9352 4489 9352 4490 9362
      4546 9331 4547 9268
TIME...MOT...LOC 0156Z 219DEG 50KT 4499 9327
WIND...HAIL 60MPH <.75IN

$$

JPC
837 
WWUS53 KMPX 110221
SVSMPX

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

MNC053-059-110236-
/O.CAN.KMPX.SV.W.0137.000000T0000Z-120611T0230Z/
HENNEPIN MN-ISANTI MN-
921 PM CDT SUN JUN 10 2012

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

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4547 9268 4544 9268 4493 9299 4507 9328
      4514 9330 4518 9337 4542 9332 4541 9302
      4547 9301
TIME...MOT...LOC 0221Z 216DEG 48KT 4521 9309

$$

MNC003-025-123-163-110230-
/O.CON.KMPX.SV.W.0137.000000T0000Z-120611T0230Z/
ANOKA MN-CHISAGO MN-RAMSEY MN-WASHINGTON MN-
921 PM CDT SUN JUN 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
WASHINGTON...RAMSEY...SOUTHERN CHISAGO AND ANOKA COUNTIES UNTIL 930
PM CDT...

AT 918 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 65 MPH.  THIS
STORM WAS LOCATED NEAR LINO LAKES...OR 9 MILES SOUTHWEST OF FOREST
LAKE...MOVING NORTHEAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  FOREST LAKE...EAST BETHEL...WYOMING...STACY...CHISAGO CITY...
  LINDSTROM...SCANDIA...CENTER CITY...SHAFER AND BETHEL.

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 4547 9268 4544 9268 4493 9299 4507 9328
      4514 9330 4518 9337 4542 9332 4541 9302
      4547 9301
TIME...MOT...LOC 0221Z 216DEG 48KT 4521 9309
WIND...HAIL 60MPH <.75IN

$$

JPC

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, 8:39 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
Jun 10, 9:29 PM CDTSevere Thunderstorm WarningMPXAnoka, Chisago, Isanti, Washington61 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.