Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 63, NWS Twin Cities, MN

May 18, 20124 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 18, 2012, 5:28 PM CDT for 4 counties in Minnesota. It was in force for 23 min. 3 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
May 18, 2012, 5:28 PM CDT (22:28 UTC)
Expired
May 18, 2012, 5:51 PM CDT
In force
23 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties McLeod County, MN, Meeker County, MN, Renville County, MN, Sibley County, MN

The radar

The Minneapolis radar (KMPX), 82 km from the middle of the area, began a volume at 22:28 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
May 18, 5:33 PM CDTHAIL 0.56 Ssw Buffalo Lake, MNESTIMATED 50 TO 60 MPH WIND GUST...LATE REPORT.
May 18, 5:35 PM CDTTSTM WND DMG6 S Buffalo Lake, MNHALF DOZEN LARGE 6 TO 8 INCH DIAMETER BRANCHES.
May 18, 5:35 PM CDTTSTM WND DMGBuffalo Lake, MNLARGE TREE DOWN IN DRIVEWAY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.5 hours before the alert went out and 79 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 2012-05-18Temperature 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 2012-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 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
1992 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
274 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.

108 
WUUS53 KMPX 182228
SVRMPX
MNC085-093-129-143-182315-
/O.NEW.KMPX.SV.W.0063.120518T2228Z-120518T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
528 PM CDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MCLEOD COUNTY IN CENTRAL MINNESOTA...
  SOUTH CENTRAL MEEKER COUNTY IN CENTRAL MINNESOTA...
  NORTHEASTERN RENVILLE COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN SIBLEY COUNTY IN CENTRAL MINNESOTA...

* UNTIL 615 PM CDT

* AT 524 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED NEAR
  BUFFALO LAKE...OR ABOUT 18 MILES EAST OF OLIVIA...AND MOVING NORTH
  AT 30 MPH.  PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING
  WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  HECTOR...
  BUFFALO LAKE...
  LAKESIDE...
  CORVUSO...
  CEDAR MILLS...

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 4499 9465 4493 9437 4462 9458 4468 9475
TIME...MOT...LOC 2228Z 201DEG 26KT 4471 9464
WIND...HAIL 60MPH 0.75IN

$$

CLF
2 follow-up statements
497 
WWUS53 KMPX 182247
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
547 PM CDT FRI MAY 18 2012

MNC143-182302-
/O.CAN.KMPX.SV.W.0063.000000T0000Z-120518T2315Z/
SIBLEY MN-
547 PM CDT FRI MAY 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SIBLEY COUNTY IS
CANCELLED...

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

LAT...LON 4474 9452 4479 9468 4499 9465 4493 9437
TIME...MOT...LOC 2247Z 201DEG 26KT 4484 9457

$$

MNC085-093-129-182315-
/O.CON.KMPX.SV.W.0063.000000T0000Z-120518T2315Z/
MCLEOD MN-MEEKER MN-RENVILLE MN-
547 PM CDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
RENVILLE...SOUTH CENTRAL MEEKER AND NORTHWESTERN MCLEOD COUNTIES
UNTIL 615 PM CDT...

AT 542 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.  THIS
STORM WAS LOCATED NEAR LAKESIDE...OR 12 MILES SOUTHWEST OF
HUTCHINSON...MOVING NORTH AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  CORVUSO AND CEDAR MILLS.

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 4474 9452 4479 9468 4499 9465 4493 9437
TIME...MOT...LOC 2247Z 201DEG 26KT 4484 9457
WIND...HAIL 60MPH <.75IN

$$

CLF
946 
WWUS53 KMPX 182251
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
551 PM CDT FRI MAY 18 2012

MNC085-093-129-182306-
/O.CAN.KMPX.SV.W.0063.000000T0000Z-120518T2315Z/
MCLEOD MN-MEEKER MN-RENVILLE MN-
551 PM CDT FRI MAY 18 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RENVILLE...SOUTH
CENTRAL MEEKER AND NORTHWESTERN MCLEOD 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.

LAT...LON 4474 9452 4479 9468 4499 9465 4493 9437
TIME...MOT...LOC 2251Z 201DEG 26KT 4487 9455

$$

CLF

The office that day

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

IssuedProductOfficeCountiesLasted
May 18, 3:52 AM CDTWind AdvisoryMPXBlue Earth, Brown, Chippewa, Faribault, Kandiyohi, Lac qui Parle and 10 more15 hr
May 18, 5:12 PM CDTSpecial Weather StatementMPXMille Lacs48 min
May 18, 5:24 PM CDTSevere Thunderstorm WarningMPXKanabec, Mille Lacs35 min
May 18, 5:37 PM CDTSpecial Weather StatementMPXBenton38 min
May 18, 5:50 PM CDTSpecial Weather StatementMPXWright40 min
May 18, 5:57 PM CDTSpecial Weather StatementMPXMorrison48 min
May 18, 6:22 PM CDTSpecial Weather StatementMPXSherburne, Wright53 min
May 18, 6:30 PM CDTSpecial Weather StatementMPXMille Lacs45 min
May 18, 6:57 PM CDTSpecial Weather StatementMPXBrown48 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.