Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 22, NWS Twin Cities, MN

May 10, 2011Dakota County, Rice County, Scott County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 10, 2011, 7:54 PM CDT for Dakota County, Rice County, Scott County, Minnesota. It was in force for 53 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 10, 2011, 7:54 PM CDT (00:54 UTC)
Expired: May 10, 2011, 8:47 PM CDT
In force: 53 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.75 in
Wind: 50.0 mph

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

The radar

The Minneapolis radar (KMPX), 36 km from the middle of the area, began a volume at 00:56 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 10, 5:53 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.9 hours before the alert went out and 38 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: 4330 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 183 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 3.0
Supercell composite: 33.9

Open this sounding in Storm Lab

The text

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

939 
WUUS53 KMPX 110054
SVRMPX
MNC037-131-139-110200-
/O.NEW.KMPX.SV.W.0022.110511T0054Z-110511T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
754 PM CDT TUE MAY 10 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN RICE COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHEASTERN SCOTT COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 900 PM CDT

* AT 751 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
  PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE. THIS STORM WAS
  LOCATED NEAR WEBSTER...OR ABOUT 13 MILES NORTH OF FARIBAULT...AND
  MOVING NORTHEAST AT 15 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  WEBSTER...
  NEW MARKET...
  ELKO...
  CASTLE ROCK...
  RANDOLPH...
  LAKEVILLE...
  FARMINGTON...
  HAMPTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE HAIL...WHICH CAN
SIGNIFICANTLY DAMAGE ROOFS...WINDOWS...SIDING AND VEHICLES. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY
MORNING FOR SOUTHEASTERN MINNESOTA.

&&

LAT...LON 4475 9326 4462 9296 4441 9330 4452 9350
TIME...MOT...LOC 0054Z 210DEG 15KT 4449 9334
WIND...HAIL <50MPH 1.75IN

$$

2 follow-up statements

183 
WWUS53 KMPX 110119
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
819 PM CDT TUE MAY 10 2011

MNC131-139-110129-
/O.CAN.KMPX.SV.W.0022.000000T0000Z-110511T0200Z/
SCOTT MN-RICE MN-
819 PM CDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL RICE AND
SOUTHEASTERN SCOTT COUNTIES IS CANCELLED...

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

LAT...LON 4465 9332 4475 9326 4462 9296 4461 9298
      4451 9322
TIME...MOT...LOC 0119Z 210DEG 15KT 4464 9322

$$

MNC037-110200-
/O.CON.KMPX.SV.W.0022.000000T0000Z-110511T0200Z/
DAKOTA MN-
819 PM CDT TUE MAY 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
DAKOTA COUNTY UNTIL 900 PM CDT...

AT 814 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL.  THIS STORM
WAS LOCATED NEAR FARMINGTON...OR 22 MILES NORTH OF FARIBAULT...MOVING
NORTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  LAKEVILLE...FARMINGTON AND HAMPTON.

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.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4465 9332 4475 9326 4462 9296 4461 9298
      4451 9322
TIME...MOT...LOC 0119Z 210DEG 15KT 4464 9322
WIND...HAIL <50MPH 1.25IN

$$

619 
WWUS53 KMPX 110147
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
847 PM CDT TUE MAY 10 2011

MNC037-110157-
/O.CAN.KMPX.SV.W.0022.000000T0000Z-110511T0200Z/
DAKOTA MN-
847 PM CDT TUE MAY 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN DAKOTA COUNTY IS
CANCELLED...

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

LAT...LON 4465 9332 4475 9326 4462 9296 4461 9298
      4451 9322
TIME...MOT...LOC 0147Z 210DEG 15KT 4474 9313

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:00 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Steele	60 min
May 10, 7:06 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Sherburne	39 min
May 10, 7:21 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison	54 min
May 10, 7:24 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Dakota, Hennepin, Scott	66 min
May 10, 7:43 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Isanti, Mille Lacs, Sherburne, Wright	62 min
May 10, 7:46 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin, Scott	59 min
May 10, 7:47 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs	58 min
May 10, 7:55 PM CDT	Tornado Warning	MPX	Anoka, Hennepin, Sherburne, Wright	35 min
May 10, 8:10 PM CDT	Tornado Warning	MPX	Hennepin	35 min
May 10, 8:27 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Kanabec, Mille Lacs	63 min
May 10, 8:44 PM CDT	Tornado Warning	MPX	Anoka, Isanti, Sherburne	35 min
May 10, 8:51 PM CDT	Tornado Warning	MPX	Isanti, Kanabec, Mille Lacs	39 min
May 10, 9:19 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	41 min
May 10, 9:29 PM CDT	Severe Thunderstorm Warning	MPX	Isanti, Kanabec, Mille Lacs	46 min
May 10, 9:31 PM CDT	Areal Flood Advisory	MPX	Isanti, Kanabec, Mille Lacs	3 hr
May 10, 10:00 PM CDT	Severe Thunderstorm Warning	MPX	Isanti	43 min
May 10, 10:03 PM CDT	Severe Thunderstorm Warning	MPX	Kanabec	36 min
May 10, 10:19 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	56 min
May 10, 10:43 PM CDT	Severe Thunderstorm Warning	MPX	Chisago	47 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.