Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 55, NWS Twin Cities, MN

May 5, 20124 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 5, 2012, 1:50 PM CDT for 4 counties in Minnesota. It was in force for 40 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
May 5, 2012, 1:50 PM CDT (18:50 UTC)
Expired
May 5, 2012, 2:30 PM CDT
In force
40 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Blue Earth County, MN, Faribault County, MN, Freeborn County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 119 km from the middle of the area, began a volume at 18:50 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 watch it was issued in

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

IssuedProductOfficeLasted
May 5, 11:38 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 6.8 hours before the alert went out and 118 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 12:00Z on 2012-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2012-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 174 square meters per square second.19395878Sfc1 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
480 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
174 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

161 
WUUS53 KMPX 051850
SVRMPX
MNC013-043-047-161-051930-
/O.NEW.KMPX.SV.W.0055.120505T1850Z-120505T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
150 PM CDT SAT MAY 5 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  FARIBAULT COUNTY IN SOUTH CENTRAL MINNESOTA...
  WESTERN FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHWESTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 230 PM CDT

* AT 145 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR DELAVAN...OR ABOUT 11 MILES NORTHEAST OF
  BLUE EARTH...AND MOVING EAST AT 40 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  BLUE EARTH...
  DELAVAN...
  WINNEBAGO...
  BRUSH CREEK...
  MINNESOTA LAKE...
  WELLS...
  ALDEN...
  FREEBORN...
  CONGER...
  OTISCO...
  MANCHESTER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4397 9355 4359 9338 4359 9413 4384 9421
TIME...MOT...LOC 1851Z 261DEG 33KT 4377 9387
WIND...HAIL 60MPH 1.00IN

$$

SPD
2 follow-up statements
591 
WWUS53 KMPX 051905
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
205 PM CDT SAT MAY 5 2012

MNC013-043-047-161-051930-
/O.CON.KMPX.SV.W.0055.000000T0000Z-120505T1930Z/
FARIBAULT MN-FREEBORN MN-WASECA MN-BLUE EARTH MN-
205 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BLUE EARTH...SOUTHWESTERN WASECA...WESTERN FREEBORN AND NORTHEASTERN
FARIBAULT COUNTIES UNTIL 230 PM CDT...

AT 204 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
WINDS OF 60 MPH.  THIS STORM WAS LOCATED NEAR WELLS...OR 19 MILES
NORTHWEST OF ALBERT LEA...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  ALDEN...FREEBORN...CONGER...OTISCO...MANCHESTER...WALDORF AND
  HARTLAND.

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 4386 9406 4397 9355 4359 9338 4359 9408
TIME...MOT...LOC 1905Z 261DEG 33KT 4379 9369
WIND...HAIL 60MPH 1.00IN

$$

SPD
373 
WWUS53 KMPX 051915
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
215 PM CDT SAT MAY 5 2012

MNC013-043-047-161-051930-
/O.CON.KMPX.SV.W.0055.000000T0000Z-120505T1930Z/
FARIBAULT MN-FREEBORN MN-WASECA MN-BLUE EARTH MN-
215 PM CDT SAT MAY 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BLUE EARTH...SOUTHWESTERN WASECA...WESTERN FREEBORN AND NORTHEASTERN
FARIBAULT COUNTIES UNTIL 230 PM CDT...

AT 213 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED NEAR FREEBORN...OR 15 MILES NORTHWEST OF ALBERT LEA...MOVING
EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  MANCHESTER AND HARTLAND.

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 4359 9402 4387 9389 4391 9352 4359 9338
TIME...MOT...LOC 1915Z 261DEG 33KT 4380 9356
WIND...HAIL <50MPH 1.00IN

$$

SPD

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 12:39 PM CDTSpecial Weather StatementMPXBrown, Martin, Watonwan51 min
May 5, 12:54 PM CDTSpecial Weather StatementMPXNicollet, Sibley66 min
May 5, 1:02 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Brown, Nicollet, Sibley43 min
May 5, 1:07 PM CDTSpecial Weather StatementMPXBlue Earth38 min
May 5, 1:11 PM CDTFlash Flood WatchMPXBlue Earth, Brown, Carver, Chippewa, Faribault, Freeborn and 21 more15 hr
May 5, 1:26 PM CDTSpecial Weather StatementMPXBlue Earth, Le Sueur, Rice, Scott, Waseca64 min
May 5, 1:36 PM CDTSevere Thunderstorm WarningMPXFaribault, Martin24 min
May 5, 2:08 PM CDTSpecial Weather StatementMPXDakota, Rice, Steele, Waseca52 min
May 5, 2:23 PM CDTSpecial Weather StatementMPXFreeborn, Steele52 min
May 5, 2:37 PM CDTSpecial Weather StatementMPXGoodhue53 min
May 5, 6:43 PM CDTSpecial Weather StatementMPXAnoka, Sherburne62 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.