Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 4, NWS Twin Cities, MN

March 19, 20126 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 19, 2012, 7:37 PM CDT for 6 counties in 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
Mar 19, 2012, 7:37 PM CDT (00:37 UTC)
Expired
Mar 19, 2012, 8:15 PM CDT
In force
38 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Anoka County, MN, Hennepin County, MN, Isanti County, MN, Mille Lacs County, MN, Sherburne County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 78 km from the middle of the area, began a volume at 00:38 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, 0.6 hours before the alert went out and 78 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 2012-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 735 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 2012-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 213 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
735 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1071 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
213 m²/s²
0-3 km storm-relative helicity
351 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

818 
WUUS53 KMPX 200037
SVRMPX
MNC003-053-059-095-141-171-200115-
/O.NEW.KMPX.SV.W.0004.120320T0037Z-120320T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
737 PM CDT MON MAR 19 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTH CENTRAL HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  WESTERN ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTHERN MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  EAST CENTRAL WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 815 PM CDT

* AT 733 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM MONTICELLO TO ST
  MICHAEL TO PLYMOUTH...AND MOVING NORTH AT 60 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  PRINCETON...
  CAMBRIDGE...
  MILACA...
  ROGERS...
  MAPLE GROVE...
  MONTICELLO...
  ALBERTVILLE...
  OSSEO...
  ST MICHAEL...
  HANOVER...
  OTSEGO...
  CHAMPLIN...
  DAYTON...
  ZIMMERMAN...
  
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 4574 9351 4569 9335 4563 9318 4504 9333
      4522 9384 4556 9376 4581 9376
TIME...MOT...LOC 0036Z 184DEG 53KT 4529 9378 4525 9361
          4511 9344
WIND...HAIL 60MPH <.75IN

$$
1 follow-up statement
609 
WWUS53 KMPX 200100
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
800 PM CDT MON MAR 19 2012

MNC053-171-200116-
/O.CAN.KMPX.SV.W.0004.000000T0000Z-120320T0115Z/
HENNEPIN MN-WRIGHT MN-
800 PM CDT MON MAR 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WRIGHT AND NORTH
CENTRAL HENNEPIN COUNTIES IS CANCELLED...

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

LAT...LON 4574 9351 4569 9335 4563 9318 4522 9328
      4541 9380 4556 9376 4581 9376
TIME...MOT...LOC 0101Z 184DEG 53KT 4566 9374 4562 9357
          4548 9340

$$

MNC003-059-095-141-200115-
/O.CON.KMPX.SV.W.0004.000000T0000Z-120320T0115Z/
ANOKA MN-ISANTI MN-MILLE LACS MN-SHERBURNE MN-
800 PM CDT MON MAR 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN
SHERBURNE...SOUTHERN MILLE LACS...WESTERN ISANTI AND NORTHWESTERN
ANOKA COUNTIES UNTIL 815 PM CDT...

AT 756 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM
GLENDORADO TO PRINCETON TO ST FRANCIS...MOVING NORTH AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  CAMBRIDGE...MILACA...PEASE...FORESTON...GRANDY AND DALBO.

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 4574 9351 4569 9335 4563 9318 4522 9328
      4541 9380 4556 9376 4581 9376
TIME...MOT...LOC 0101Z 184DEG 53KT 4566 9374 4562 9357
          4548 9340
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 7:12 PM CDTSevere Thunderstorm WarningMPXAnoka, Carver, Hennepin, Scott, Wright33 min
Mar 19, 8:22 PM CDTSpecial Weather StatementMPXDakota, Goodhue, Ramsey, Washington38 min
Mar 19, 9:14 PM CDTSpecial Weather StatementMPXChisago46 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.