Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 107, NWS Twin Cities, MN

May 27, 20124 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 27, 2012, 7:50 PM CDT for 4 counties in Minnesota. It was in force for 55 min. 1 report 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 27, 2012, 7:50 PM CDT (00:50 UTC)
Expired: May 27, 2012, 8:45 PM CDT
In force: 55 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Le Sueur County, MN, Nicollet County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 84 km from the middle of the area, began a volume at 00:53 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

Time	Report	Where	Remark
May 27, 8:10 PM CDT	TSTM WND DMG	North Mankato, MN	TREE DOWN

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

The watch it was issued in

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

Issued	Product	Office	Lasted
May 27, 6:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.8 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1850 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1669 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 17.0

Open this sounding in Storm Lab

The text

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

804 
WUUS53 KMPX 280050
SVRMPX
MNC013-079-103-161-280145-
/O.NEW.KMPX.SV.W.0107.120528T0050Z-120528T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
750 PM CDT SUN MAY 27 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHEASTERN NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  NORTHWESTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 845 PM CDT

* AT 749 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS OF 60 MPH. THIS
  STORM WAS LOCATED NEAR GOOD THUNDER...OR ABOUT 12 MILES SOUTH OF
  MANKATO...AND MOVING NORTHEAST AT 35 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  MANKATO...
  GOOD THUNDER...
  MAPLETON...
  AMBOY...
  PEMBERTON...
  ST CLAIR...
  NORTH MANKATO...
  EAGLE LAKE...
  JANESVILLE...
  KASOTA...
  ELYSIAN...
  WATERVILLE...
  CLEVELAND...

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 4435 9396 4426 9354 4386 9382 4386 9422
TIME...MOT...LOC 0050Z 205DEG 29KT 4400 9404
WIND...HAIL 60MPH 1.00IN

$$

2 follow-up statements

413 
WWUS53 KMPX 280113
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
813 PM CDT SUN MAY 27 2012

MNC161-280127-
/O.CAN.KMPX.SV.W.0107.000000T0000Z-120528T0145Z/
WASECA MN-
813 PM CDT SUN MAY 27 2012

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

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

LAT...LON 4405 9410 4416 9405 4417 9400 4419 9402
      4423 9402 4430 9399 4434 9394 4430 9376
      4406 9387
TIME...MOT...LOC 0112Z 205DEG 29KT 4416 9394

$$

MNC013-079-280145-
/O.CON.KMPX.SV.W.0107.000000T0000Z-120528T0145Z/
LE SUEUR MN-BLUE EARTH MN-
813 PM CDT SUN MAY 27 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
BLUE EARTH AND SOUTHWESTERN LE SUEUR COUNTIES UNTIL 845 PM CDT...

AT 807 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS OF 60 MPH.  THIS
STORM WAS LOCATED NEAR MANKATO...MOVING NORTHEAST AT 35 MPH. PENNY
SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  EAGLE LAKE...KASOTA AND MADISON LAKE.

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 4405 9410 4416 9405 4417 9400 4419 9402
      4423 9402 4430 9399 4434 9394 4430 9376
      4406 9387
TIME...MOT...LOC 0112Z 205DEG 29KT 4416 9394
WIND...HAIL 60MPH 0.75IN

$$

JLT

328 
WWUS53 KMPX 280137
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
837 PM CDT SUN MAY 27 2012

MNC013-079-280152-
/O.EXP.KMPX.SV.W.0107.000000T0000Z-120528T0145Z/
LE SUEUR MN-BLUE EARTH MN-
837 PM CDT SUN MAY 27 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BLUE EARTH AND
SOUTHWESTERN LE SUEUR COUNTIES WILL EXPIRE AT 845 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN THE TWIN CITIES.

LAT...LON 4405 9410 4416 9405 4417 9400 4419 9402
      4423 9402 4430 9399 4434 9394 4430 9376
      4406 9387
TIME...MOT...LOC 0137Z 205DEG 29KT 4434 9382

$$

JLT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:09 PM CDT	Areal Flood Advisory	MPX	Chisago	3 hr
May 27, 7:15 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott	60 min
May 27, 7:27 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	48 min
May 27, 7:30 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet, Sibley, Watonwan	60 min
May 27, 7:39 PM CDT	Special Weather Statement	MPX	Ramsey, Washington	51 min
May 27, 7:44 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Stearns	61 min
May 27, 7:45 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin	45 min
May 27, 7:55 PM CDT	Flash Flood Warning	MPX	Chisago	5 hr
May 27, 8:07 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker, Renville	53 min
May 27, 8:15 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Ramsey	34 min
May 27, 8:22 PM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 1 more	6 hr
May 27, 8:24 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, McLeod, Scott, Wright	51 min
May 27, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	46 min
May 27, 8:33 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	57 min
May 27, 8:58 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti, Kanabec	62 min
May 27, 9:15 PM CDT	Special Weather Statement	MPX	Brown, Martin, Watonwan	45 min
May 27, 9:27 PM CDT	Flash Flood Warning	MPX	Blue Earth, Brown, Hennepin, McLeod, Meeker, Nicollet and 4 more	6 hr
May 27, 9:28 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Sherburne, Stearns	62 min
May 27, 9:43 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Isanti, Kanabec, Mille Lacs	62 min
May 27, 9:46 PM CDT	Flash Flood Warning	MPX	Anoka, Carver, Chisago, Dakota, Hennepin, Isanti and 2 more	6 hr
May 27, 9:53 PM CDT	Flash Flood Warning	MPX	Benton, Mille Lacs, Sherburne, Stearns	4 hr
May 27, 10:02 PM CDT	Special Weather Statement	MPX	Blue Earth, Martin, Nicollet, Sibley, Waseca	43 min
May 27, 10:09 PM CDT	Special Weather Statement	MPX	Mille Lacs, Morrison	51 min
May 27, 10:19 PM CDT	Areal Flood Advisory	MPX	Kanabec, Mille Lacs, Morrison	4 hr
May 27, 10:42 PM CDT	Special Weather Statement	MPX	Dakota, Freeborn, Rice, Steele, Waseca	48 min
May 27, 11:00 PM CDT	River Flood Warning	MPX	Brown	66 hr
May 27, 11:05 PM CDT	Special Weather Statement	MPX	Dakota, Freeborn, Goodhue, Steele	40 min
May 27, 11:23 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	29 min
May 28, 12:58 AM CDT	Areal Flood Warning	MPX	Chisago	6 hr
May 28, 9:34 AM CDT	River Flood Warning	MPX	Hennepin, Wright	6 days
May 28, 1:54 PM CDT	Special Weather Statement	MPX	Benton, Stearns	66 min
May 28, 2:10 PM CDT	Severe Thunderstorm Warning	MPX	Stearns	50 min
May 28, 2:26 PM CDT	Special Weather Statement	MPX	Benton, Mille Lacs	64 min
May 28, 2:44 PM CDT	Severe Thunderstorm Warning	MPX	Mille Lacs, Morrison	61 min
May 28, 2:46 PM CDT	Severe Thunderstorm Warning	MPX	Benton	44 min
May 28, 2:48 PM CDT	Special Weather Statement	MPX	Morrison	42 min
May 28, 3:05 PM CDT	Special Weather Statement	MPX	Benton	40 min
May 28, 3:26 PM CDT	Special Weather Statement	MPX	Isanti, Kanabec, Sherburne	79 min
May 28, 3:30 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	45 min
May 28, 4:18 PM CDT	Special Weather Statement	MPX	Chisago	42 min
May 28, 4:51 PM CDT	Special Weather Statement	MPX	Chisago	24 min
May 28, 5:33 PM CDT	Special Weather Statement	MPX	Chisago	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every 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.