Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 29, NWS Twin Cities, MN

May 2, 2012Brown County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 2, 2012, 7:12 PM CDT for Brown County, Minnesota. It was in force for 63 min. 2 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 2, 2012, 7:12 PM CDT (00:12 UTC)
Expired: May 2, 2012, 8:15 PM CDT
In force: 63 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Brown County, MN

The radar

The Minneapolis radar (KMPX), 106 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.

What was reported inside it

Time	Report	Where	Remark
May 2, 7:33 PM CDT	HAIL 1	8 Sw New Ulm, MN	DELAYED REPORT..QUARTER SIZE HAIL. TIME ESTIMATED FROM RADAR.
May 2, 7:36 PM CDT	HAIL 1	8 Sw New Ulm, MN

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 2, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 104 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: 84 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1937 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

201 
WUUS53 KMPX 030012
SVRMPX
MNC015-030115-
/O.NEW.KMPX.SV.W.0029.120503T0012Z-120503T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
712 PM CDT WED MAY 2 2012

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 815 PM CDT

* AT 710 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED 9 MILES SOUTH
  OF SLEEPY EYE...OR ABOUT 14 MILES NORTH OF ST JAMES...AND MOVING
  NORTHEAST AT 15 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  HANSKA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4436 9458 4426 9438 4412 9437 4411 9478
      4415 9483
TIME...MOT...LOC 0012Z 243DEG 14KT 4418 9471
WIND...HAIL <50MPH 1.00IN

$$

2 follow-up statements

075 
WWUS53 KMPX 030042
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
742 PM CDT WED MAY 2 2012

MNC015-030115-
/O.CON.KMPX.SV.W.0029.000000T0000Z-120503T0115Z/
BROWN MN-
742 PM CDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN BROWN
COUNTY UNTIL 815 PM CDT...

AT 737 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED NEAR HANSKA...OR 9 MILES SOUTHWEST OF NEW ULM...MOVING EAST
AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EASTERN BROWN COUNTY.

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 4423 9465 4436 9458 4426 9438 4412 9437
      4412 9456
TIME...MOT...LOC 0042Z 255DEG 17KT 4420 9450
WIND...HAIL <50MPH 1.00IN

$$

449 
WWUS53 KMPX 030052
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
752 PM CDT WED MAY 2 2012

MNC015-030115-
/O.CON.KMPX.SV.W.0029.000000T0000Z-120503T0115Z/
BROWN MN-
752 PM CDT WED MAY 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BROWN COUNTY UNTIL 815 PM CDT...

AT 751 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED NEAR HANSKA...OR 8 MILES SOUTH OF NEW ULM...MOVING EAST AT 20
MPH.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF EXTREME EASTERN BROWN COUNTY.

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 4412 9447 4423 9451 4430 9446 4426 9438
      4412 9437
TIME...MOT...LOC 0052Z 263DEG 18KT 4420 9442
WIND...HAIL <50MPH 1.00IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 7:29 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	61 min
May 2, 7:30 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue, Rice, Steele	60 min
May 2, 7:32 PM CDT	Tornado Warning	MPX	Rice, Steele, Waseca	28 min
May 2, 7:51 PM CDT	Areal Flood Advisory	MPX	Goodhue, Rice	3 hr
May 2, 7:58 PM CDT	Special Weather Statement	MPX	Nicollet	62 min
May 2, 8:22 PM CDT	Flash Flood Warning	MPX	Goodhue	3 hr
May 2, 8:27 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	33 min
May 2, 8:46 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	29 min
May 2, 9:08 PM CDT	Special Weather Statement	MPX	Lac qui Parle	52 min
May 2, 9:25 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Lac qui Parle, Swift	50 min
May 2, 10:01 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle	44 min
May 2, 10:12 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Stevens, Swift	48 min
May 2, 10:25 PM CDT	Tornado Warning	MPX	Chippewa, Lac qui Parle	35 min
May 2, 10:55 PM CDT	Severe Thunderstorm Warning	MPX	Pope, Swift	50 min
May 2, 11:00 PM CDT	Tornado Warning	MPX	Chippewa	45 min
May 2, 11:46 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi	59 min
May 3, 12:47 AM CDT	Special Weather Statement	MPX	Meeker, Stearns	58 min
May 3, 1:05 AM CDT	Severe Thunderstorm Warning	MPX	Meeker	55 min
May 3, 1:59 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Hennepin, Sherburne, Wright	76 min
May 3, 6:24 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Todd	36 min
May 3, 6:49 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Morrison, Todd	41 min
May 3, 7:34 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	41 min
May 3, 7:57 AM CDT	Special Weather Statement	MPX	Scott	48 min
May 3, 8:31 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Rice, Scott	59 min
May 3, 9:00 AM CDT	Special Weather Statement	MPX	Wright	45 min
May 3, 9:37 AM CDT	Special Weather Statement	MPX	Anoka, Carver, Hennepin, Ramsey	38 min
May 3, 10:12 AM CDT	Special Weather Statement	MPX	Le Sueur	48 min
May 3, 10:22 AM CDT	Severe Thunderstorm Warning	MPX	Dakota, Washington	56 min
May 3, 10:36 AM CDT	Severe Thunderstorm Warning	MPX	Washington	30 min
May 3, 10:55 AM CDT	Special Weather Statement	MPX	Goodhue, Rice	50 min
May 3, 3:05 PM CDT	Special Weather Statement	MPX	Steele, Waseca	40 min
May 3, 3:37 PM CDT	Special Weather Statement	MPX	Steele	38 min
May 3, 4:25 PM CDT	Special Weather Statement	MPX	Faribault	50 min
May 3, 6:19 PM CDT	Special Weather Statement	MPX	Waseca	26 min
May 3, 6:30 PM CDT	Severe Thunderstorm Warning	MPX	Waseca	20 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.