Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 56, NWS Twin Cities, MN

May 28, 20114 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 28, 2011, 3:45 PM CDT for 4 counties in Minnesota. It was in force for 45 min. 5 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 28, 2011, 3:45 PM CDT (20:45 UTC)
Expired: May 28, 2011, 4:30 PM CDT
In force: 45 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Dakota County, MN, Goodhue County, MN, Rice County, MN, Scott County, MN

The radar

The Minneapolis radar (KMPX), 41 km from the middle of the area, began a volume at 20:47 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.

What was reported inside it

Time	Report	Where
May 28, 3:52 PM CDT	HAIL 0.75	Lakeville, MN
May 28, 3:53 PM CDT	HAIL 0.88	3 S Burnsville, MN
May 28, 3:54 PM CDT	HAIL 0.75	3 Sw Burnsville, MN
May 28, 3:54 PM CDT	HAIL 0.88	5 Se Burnsville, MN
May 28, 4:00 PM CDT	HAIL 0.75	2 S Lakeville, 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 28, 2:11 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.8 hours before the alert went out and 42 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 918 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 172 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.

855 
WUUS53 KMPX 282045
SVRMPX
MNC037-049-131-139-282130-
/O.NEW.KMPX.SV.W.0056.110528T2045Z-110528T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
345 PM CDT SAT MAY 28 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  WEST CENTRAL GOODHUE COUNTY IN SOUTHEAST MINNESOTA...
  NORTHERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  EASTERN SCOTT COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 430 PM CDT

* AT 338 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING HALF DOLLAR SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
  MPH. THIS STORM WAS LOCATED NEAR NEW PRAGUE...OR ABOUT 19 MILES   
  EAST OF LE SUEUR...AND MOVING EAST AT 35 MPH. RADAR CONTINUES TO 
  INDICATE ROTATION WITH THIS STORM. 

LOCATIONS IN THE WARNING INCLUDE...
  VESELI...
  PRIOR LAKE...
  LONSDALE...
  CREDIT RIVER...
  WEBSTER...
  NEW MARKET...
  ELKO...
  LAKEVILLE...
  CASTLE ROCK...
  FARMINGTON...
  NORTHFIELD...
  RANDOLPH...
  COATES...
  STANTON...

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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

&&

LAT...LON 4440 9290 4449 9354 4454 9354 4454 9360
      4474 9357 4472 9286
TIME...MOT...LOC 2043Z 270DEG 32KT 4456 9347
WIND...HAIL 60MPH 1.25IN

$$

1 follow-up statement

268 
WWUS53 KMPX 282106
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
406 PM CDT SAT MAY 28 2011

MNC037-049-131-139-282130-
/O.CON.KMPX.SV.W.0056.000000T0000Z-110528T2130Z/
DAKOTA MN-SCOTT MN-GOODHUE MN-RICE MN-
406 PM CDT SAT MAY 28 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
RICE...WEST CENTRAL GOODHUE...SOUTHEASTERN SCOTT AND SOUTHERN DAKOTA
COUNTIES UNTIL 430 PM CDT...

AT 401 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
CASTLE ROCK...OR 3 MILES SOUTH OF LAKEVILLE...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  NORTHFIELD...RANDOLPH...COATES...STANTON...HAMPTON...VERMILLION...
  NEW TRIER AND CANNON FALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING QUARTER TO GOLF BALL SIZE HAIL. 
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4440 9290 4449 9340 4460 9340 4474 9339
      4472 9286
TIME...MOT...LOC 2105Z 271DEG 34KT 4461 9318
WIND...HAIL 60MPH 1.25IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 1:56 PM CDT	Severe Thunderstorm Warning	MPX	Nicollet, Redwood, Sibley	7 min
May 28, 2:00 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet, Redwood, Renville, Sibley	34 min
May 28, 2:16 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Le Sueur, McLeod, Rice, Scott and 1 more	44 min
May 28, 2:39 PM CDT	Tornado Warning	MPX	Carver, Scott, Sibley	36 min
May 28, 3:06 PM CDT	Tornado Warning	MPX	Carver, Le Sueur, Rice, Scott, Sibley	39 min
May 28, 3:57 PM CDT	Tornado Warning	MPX	Dakota, Goodhue, Rice, Scott	33 min
May 28, 4:27 PM CDT	Special Weather Statement	MPX	Dakota	48 min
May 28, 4:35 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue	40 min
May 28, 4:43 PM CDT	Special Weather Statement	MPX	Kanabec, Mille Lacs	47 min
May 28, 6:18 PM CDT	Special Weather Statement	MPX	Rice	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every severe thunderstorm warning in 2011

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.