Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 83, NWS Twin Cities, MN

May 23, 2012Brown County, Nicollet County, Sibley County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 23, 2012, 5:45 PM CDT for Brown County, Nicollet County, Sibley County, Minnesota. It was in force for 34 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 23, 2012, 5:45 PM CDT (22:45 UTC)
Expired
May 23, 2012, 6:19 PM CDT
In force
34 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.88 in
Wind
65.0 mph

Counties Brown County, MN, Nicollet County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 85 km from the middle of the area, began a volume at 22:47 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 12:00Z, 10.8 hours before the alert went out and 83 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 2012-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 354 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1960 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
354 m²/s²
0-3 km storm-relative helicity
362 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

932 
WUUS53 KMPX 232245
SVRMPX
MNC015-103-143-232330-
/O.NEW.KMPX.SV.W.0083.120523T2245Z-120523T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
545 PM CDT WED MAY 23 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BROWN COUNTY IN SOUTH CENTRAL MINNESOTA...
  WESTERN NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  WESTERN SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 630 PM CDT

* AT 542 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS OF 65 MPH. THIS STORM WAS LOCATED 6 MILES
  WEST OF HANSKA...OR ABOUT 12 MILES SOUTHWEST OF NEW ULM...AND
  MOVING NORTHEAST AT 55 MPH.  NICKEL SIZE HAIL MAY ALSO ACCOMPANY
  THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  NEW ULM...
  GAYLORD...
  HANSKA...
  SLEEPY EYE...
  KLOSSNER...
  ST GEORGE...
  LAFAYETTE...
  GIBBON...
  WINTHROP...
  NEW AUBURN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4411 9485 4446 9468 4446 9462 4455 9463
      4471 9455 4471 9450 4463 9449 4463 9426
      4470 9425 4470 9401 4411 9449
TIME...MOT...LOC 2245Z 203DEG 50KT 4422 9459
WIND...HAIL 65MPH 0.88IN

$$
2 follow-up statements
118 
WWUS53 KMPX 232306
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
606 PM CDT WED MAY 23 2012

MNC015-232321-
/O.CAN.KMPX.SV.W.0083.000000T0000Z-120523T2330Z/
BROWN MN-
606 PM CDT WED MAY 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BROWN COUNTY IS
CANCELLED...

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

LAT...LON 4444 9469 4446 9468 4446 9462 4455 9463
      4471 9455 4471 9450 4463 9449 4463 9426
      4470 9425 4470 9401 4430 9434
TIME...MOT...LOC 2306Z 203DEG 50KT 4449 9443

$$

MNC103-143-232330-
/O.CON.KMPX.SV.W.0083.000000T0000Z-120523T2330Z/
NICOLLET MN-SIBLEY MN-
606 PM CDT WED MAY 23 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN SIBLEY
AND NORTHWESTERN NICOLLET COUNTIES UNTIL 630 PM CDT...

AT 601 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.  THIS
STORM WAS LOCATED NEAR LAFAYETTE...OR 8 MILES NORTH OF NEW ULM...
MOVING NORTHEAST AT 55 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  GAYLORD...WINTHROP...NEW AUBURN AND NEW SWEDEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4444 9469 4446 9468 4446 9462 4455 9463
      4471 9455 4471 9450 4463 9449 4463 9426
      4470 9425 4470 9401 4430 9434
TIME...MOT...LOC 2306Z 203DEG 50KT 4449 9443
WIND...HAIL 60MPH 0.88IN

$$
345 
WWUS53 KMPX 232319
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
619 PM CDT WED MAY 23 2012

MNC103-143-232334-
/O.CAN.KMPX.SV.W.0083.000000T0000Z-120523T2330Z/
NICOLLET MN-SIBLEY MN-
619 PM CDT WED MAY 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN SIBLEY AND
NORTHWESTERN NICOLLET COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY...HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4444 9469 4446 9468 4446 9462 4455 9463
      4471 9455 4471 9450 4463 9449 4463 9426
      4470 9425 4470 9401 4430 9434
TIME...MOT...LOC 2319Z 203DEG 50KT 4466 9433

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 23, 3:23 AM CDTFlash Flood WatchMPXAnoka, Benton, Blue Earth, Brown, Carver, Chisago and 22 more34 hr
May 23, 10:56 AM CDTWind AdvisoryMPXBlue Earth, Faribault, Freeborn, Martin, Steele, Waseca8 hr
May 23, 12:39 PM CDTSevere Thunderstorm WarningMPXDouglas, Pope, Todd51 min
May 23, 1:03 PM CDTSpecial Weather StatementMPXKanabec27 min
May 23, 2:06 PM CDTSpecial Weather StatementMPXChippewa, Douglas, Kandiyohi, Lac qui Parle, Morrison, Pope and 4 more84 min
May 23, 5:08 PM CDTSevere Thunderstorm WarningMPXMcLeod, Nicollet, Sibley37 min
May 23, 5:17 PM CDTSevere Thunderstorm WarningMPXBrown, Nicollet, Watonwan28 min
May 23, 5:59 PM CDTSpecial Weather StatementMPXRedwood46 min
May 23, 6:51 PM CDTSpecial Weather StatementMPXRenville39 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.