Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Twin Cities, MN

March 19, 20125 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Mar 19, 2012, 7:12 PM CDT for 5 counties in Minnesota. It was in force for 33 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, 7:12 PM CDT (00:12 UTC)
Expired
Mar 19, 2012, 7:45 PM CDT
In force
33 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Anoka County, MN, Carver County, MN, Hennepin County, MN, Scott County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 33 km from the middle of the area, began a volume at 00:14 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, 0.2 hours before the alert went out and 34 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.

821 
WUUS53 KMPX 200012
SVRMPX
MNC003-019-053-139-171-200045-
/O.NEW.KMPX.SV.W.0003.120320T0012Z-120320T0045Z/

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN CARVER COUNTY IN EAST CENTRAL MINNESOTA...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  NORTH CENTRAL SCOTT COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN WRIGHT COUNTY IN CENTRAL MINNESOTA...

* UNTIL 745 PM CDT

* AT 708 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
  LOCATED NEAR CHASKA...OR ABOUT 17 MILES SOUTHWEST OF PLYMOUTH...AND
  MOVING NORTH AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  PLYMOUTH...
  MINNEAPOLIS...
  CHASKA...
  CARVER...
  SHAKOPEE...
  MARYSTOWN...
  COLOGNE...
  PRIOR LAKE...
  SAVAGE...
  WACONIA...
  EDEN PRAIRIE...
  CHANHASSEN...
  VICTORIA...
  ST BONIFACIUS...
  SHOREWOOD...
  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 4529 9357 4525 9352 4527 9351 4528 9350
      4523 9317 4512 9321 4512 9323 4508 9323
      4466 9339 4473 9387 4530 9373
TIME...MOT...LOC 0010Z 186DEG 45KT 4483 9363
WIND...HAIL 60MPH <.75IN

$$
1 follow-up statement
976 
WWUS53 KMPX 200038
SVSMPX

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

MNC019-139-200054-
/O.CAN.KMPX.SV.W.0003.000000T0000Z-120320T0045Z/
CARVER MN-SCOTT MN-
738 PM CDT MON MAR 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SCOTT AND
EASTERN CARVER COUNTIES IS CANCELLED...

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

LAT...LON 4529 9357 4525 9352 4528 9350 4523 9317
      4513 9321 4512 9323 4491 9329 4507 9379
      4530 9373
TIME...MOT...LOC 0039Z 186DEG 45KT 4519 9358

$$

MNC003-053-171-200045-
/O.CON.KMPX.SV.W.0003.000000T0000Z-120320T0045Z/
ANOKA MN-HENNEPIN MN-WRIGHT MN-
738 PM CDT MON MAR 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL
WRIGHT...NORTHERN HENNEPIN AND SOUTHERN ANOKA COUNTIES UNTIL 745 PM
CDT...

AT 737 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR ROGERS...OR 11 MILES NORTHWEST OF
PLYMOUTH...MOVING NORTH AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  ST MICHAEL...ANOKA...ALBERTVILLE...OTSEGO AND RAMSEY.

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 4529 9357 4525 9352 4528 9350 4523 9317
      4513 9321 4512 9323 4491 9329 4507 9379
      4530 9373
TIME...MOT...LOC 0039Z 186DEG 45KT 4519 9358
WIND...HAIL 60MPH <.75IN

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 7:37 PM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin, Isanti, Mille Lacs, Sherburne, Wright38 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.