Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 102, NWS Twin Cities, MN

July 1, 201111 counties in Minnesota; Polk County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 1, 2011, 6:42 PM CDT for 11 counties in Minnesota; Polk County, Wisconsin. It was in force for 63 min. 10 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: Jul 1, 2011, 6:42 PM CDT (23:42 UTC)
Expired: Jul 1, 2011, 7:45 PM CDT
In force: 63 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 75.0 mph

Counties Anoka County, MN, Benton County, MN, Chisago County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN, Sherburne County, MN, Stearns County, MN, Wright County, MN, Polk County, WI

The radar

The Minneapolis radar (KMPX), 107 km from the middle of the area, began a volume at 23:45 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
Jul 1, 6:45 PM CDT	TSTM WND DMG	1 Se Cambridge, MN	ONE FOOT DIAMETER TREE DOWN.
Jul 1, 6:45 PM CDT	TSTM WND DMG	4 Ssw North Branch, MN	TREES DOWN
Jul 1, 6:45 PM CDT	TSTM WND GST 73	1 Ssw Buffalo, MN	6 INCH TO 8 INCH BRANCHES DOWN
Jul 1, 6:52 PM CDT	TSTM WND DMG	Buffalo, MN	12 INCH PINE TREE DOWN BY HWY 55 AND HWY 25
Jul 1, 6:53 PM CDT	TSTM WND DMG	Buffalo, MN	TOP OF LARGE TREES BEING SNAPPED
Jul 1, 6:55 PM CDT	TSTM WND GST 56	Monticello, MN
Jul 1, 6:56 PM CDT	TSTM WND DMG	8 N Big Lake, MN	2 FOOT TREES DOWN. DAMAGE IS IN THE TOWN OF ORROCK.
Jul 1, 6:57 PM CDT	TSTM WND DMG	Elk River, MN	TREES DOWN OVER ROADS IN TOWN
Jul 1, 7:00 PM CDT	TSTM WND DMG	3 Ne Rush City, MN	WIDESPREAD WIND DAMAGE AROUND RUSH CITY INCLUDING MULTIPLE 12 INCH DIAMETER TREES SNAPPED.
Jul 1, 7:40 PM CDT	TSTM WND DMG	Cambridge, MN	ROOF BLOWN OFF SUPER AMERICA, TREES 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
Jul 1, 2:08 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.7 hours before the alert went out and 108 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: 3970 J/kg
Mixed-layer CIN: -245 J/kg
Mixed-layer LCL: 1089 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

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

734 
WUUS53 KMPX 012342
SVRMPX
MNC003-009-025-053-059-065-095-097-141-145-171-WIC095-020045-
/O.NEW.KMPX.SV.W.0102.110701T2342Z-110702T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
642 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  BENTON COUNTY IN CENTRAL MINNESOTA...
  CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHWESTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  ISANTI COUNTY IN EAST CENTRAL MINNESOTA...
  KANABEC COUNTY IN EAST CENTRAL MINNESOTA...
  MILLE LACS COUNTY IN EAST CENTRAL MINNESOTA...
  EASTERN MORRISON COUNTY IN CENTRAL MINNESOTA...
  SHERBURNE COUNTY IN CENTRAL MINNESOTA...
  EASTERN STEARNS COUNTY IN CENTRAL MINNESOTA...
  WRIGHT COUNTY IN CENTRAL MINNESOTA...
  NORTHWESTERN POLK COUNTY IN NORTHWEST WISCONSIN...

* UNTIL 745 PM CDT

* AT 640 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN
  EXCESS OF 75 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM HOLDINGFORD TO BECKER TO HAMEL...AND MOVING NORTHEAST AT 40
  MPH.

LOCATIONS IN THE WARNING INCLUDE...
  ST CLOUD...
  BUFFALO...
  PRINCETON...
  MILACA...
  CAMBRIDGE...
  NORTH BRANCH...
  MORA...
  HANOVER...
  MONTICELLO...
  CLEAR LAKE...
  BECKER...
  HAMEL...
  HOLDINGFORD...
  WAITE PARK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4611 9304 4598 9304 4597 9313 4574 9313
      4573 9288 4565 9287 4565 9254 4573 9254
      4574 9250 4564 9238 4514 9333 4497 9378
      4554 9464 4616 9414 4616 9383 4624 9382
TIME...MOT...LOC 2343Z 207DEG 36KT 4573 9440 4540 9383
          4511 9357
WIND...HAIL 75MPH 1.00IN

$$

3 follow-up statements

572 
WWUS53 KMPX 020016
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
716 PM CDT FRI JUL 1 2011

MNC003-009-025-053-059-065-095-097-141-145-171-WIC095-020045-
/O.CON.KMPX.SV.W.0102.000000T0000Z-110702T0045Z/
ANOKA MN-BENTON MN-CHISAGO MN-HENNEPIN MN-ISANTI MN-KANABEC MN-
MILLE LACS MN-MORRISON MN-SHERBURNE MN-STEARNS MN-WRIGHT MN-POLK WI-
716 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
POLK...EASTERN WRIGHT...SOUTHEASTERN STEARNS...SHERBURNE...
SOUTHEASTERN MORRISON...MILLE LACS...KANABEC...ISANTI...NORTHWESTERN
HENNEPIN...CHISAGO...BENTON AND ANOKA COUNTIES UNTIL 745 PM CDT...

AT 712 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 75 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM PARENT TO ROGERS...MOVING NORTHEAST AT 30
MPH.

LOCATIONS IMPACTED INCLUDE...
  PRINCETON...MILACA...CAMBRIDGE...NORTH BRANCH...MORA...OSSEO...
  OTSEGO...DAYTON...MAYHEW...PARENT...CHAMPLIN...ELK RIVER...
  SANTIAGO...ANOKA AND RAMSEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR 
DESTRUCTIVE WINDS...WHICH CAN UPROOT TREES...DOWN POWER LINES...AND 
CAUSE DAMAGE TO ROOFS AND WINDOWS. EVACUATE MOBILE HOMES AS THEY MAY 
BE OVERTURNED. LARGE HAIL IS ALSO EXPECTED...WHICH CAN CAUSE DAMAGE 
TO VEHICLES AND WINDOWS. 

THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS 
MEEKER...STEARNS AND SHERBURNE COUNTIES. 

THIS IS AN EXTREMELY DANGEROUS SITUATION WITH TORNADO LIKE WIND
SPEEDS EXPECTED. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE
ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS MAGNITUDE AND MAY BE
OVERTURNED. MOVE IMMEDIATELY TO A STURDY BUILDING AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4611 9305 4598 9304 4597 9313 4574 9313
      4573 9288 4565 9287 4565 9254 4573 9254
      4574 9250 4564 9238 4514 9332 4497 9378
      4557 9435 4620 9357
TIME...MOT...LOC 0015Z 229DEG 27KT 4559 9401 4517 9349
WIND...HAIL 75MPH 1.00IN

$$

JC

605 
WWUS53 KMPX 020032
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
732 PM CDT FRI JUL 1 2011

MNC009-053-097-141-145-171-020046-
/O.CAN.KMPX.SV.W.0102.000000T0000Z-110702T0045Z/
BENTON MN-HENNEPIN MN-MORRISON MN-SHERBURNE MN-STEARNS MN-WRIGHT MN-
732 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WRIGHT...SOUTHEASTERN
STEARNS...SHERBURNE...SOUTHEASTERN MORRISON...NORTHWESTERN HENNEPIN
AND BENTON COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4611 9305 4599 9304 4597 9313 4574 9313
      4573 9288 4565 9287 4565 9254 4573 9254
      4574 9250 4564 9238 4520 9321 4599 9378
TIME...MOT...LOC 0031Z 215DEG 27KT 4595 9360 4552 9308

$$

MNC003-025-059-065-095-WIC095-020045-
/O.CON.KMPX.SV.W.0102.000000T0000Z-110702T0045Z/
ANOKA MN-CHISAGO MN-ISANTI MN-KANABEC MN-MILLE LACS MN-POLK WI-
732 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
POLK...CENTRAL MILLE LACS...KANABEC...ISANTI...CHISAGO AND
NORTHEASTERN ANOKA COUNTIES UNTIL 745 PM CDT...

AT 726 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 75 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 11 MILES SOUTH OF ONAMIA TO BODUM...
MOVING NORTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  NORTH BRANCH...MORA...GRANDY...OGILVIE...BRANCH...STANCHFIELD...
  BRAHAM...HARRIS...GRASSTON...RUSH CITY...QUAMBA...WARMAN...WOLF
  CREEK...CUSHING AND FREDERIC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS AN EXTREMELY DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF 
THIS STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN 
UPROOT TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND 
WINDOWS. EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL 
IS ALSO EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. 

TORNADO LIKE WIND SPEEDS CAN BE EXPECTED. MOBILE HOMES AND HIGH 
PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS 
MAGNITUDE AND MAY BE OVERTURNED. MOVE IMMEDIATELY TO A STURDY 
BUILDING AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4611 9305 4599 9304 4597 9313 4574 9313
      4573 9288 4565 9287 4565 9254 4573 9254
      4574 9250 4564 9238 4520 9321 4599 9378
TIME...MOT...LOC 0031Z 215DEG 27KT 4595 9360 4552 9308
WIND...HAIL 75MPH 1.00IN

$$

JC

146 
WWUS53 KMPX 020041
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
741 PM CDT FRI JUL 1 2011

MNC003-059-065-095-020056-
/O.CAN.KMPX.SV.W.0102.000000T0000Z-110702T0045Z/
ANOKA MN-ISANTI MN-KANABEC MN-MILLE LACS MN-
741 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MILLE LACS...
KANABEC...ISANTI AND NORTHEASTERN ANOKA COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED ACROSS 
THE WARNED AREA.

LAT...LON 4565 9287 4565 9254 4573 9254 4574 9250
      4564 9238 4536 9291
TIME...MOT...LOC 0041Z 233DEG 37KT 4601 9267 4545 9251

$$

MNC025-WIC095-020045-
/O.CON.KMPX.SV.W.0102.000000T0000Z-110702T0045Z/
CHISAGO MN-POLK WI-
741 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
POLK AND CENTRAL CHISAGO COUNTIES UNTIL 745 PM CDT...

AT 740 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 75 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 12 MILES EAST OF HINCKLEY TO CENTURIA...
MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  FREDERIC.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4565 9287 4565 9254 4573 9254 4574 9250
      4564 9238 4536 9291
TIME...MOT...LOC 0041Z 233DEG 37KT 4601 9267 4545 9251
WIND...HAIL 75MPH 1.00IN

$$

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 4:05 PM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood, Renville, Yellow Medicine	55 min
Jul 1, 4:31 PM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	59 min
Jul 1, 4:37 PM CDT	Tornado Warning	MPX	Redwood, Renville	23 min
Jul 1, 4:53 PM CDT	Severe Thunderstorm Warning	MPX	Chippewa, Kandiyohi, Redwood, Renville, Sibley	67 min
Jul 1, 4:57 PM CDT	Tornado Warning	MPX	Redwood, Renville	33 min
Jul 1, 4:59 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	61 min
Jul 1, 5:13 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, McLeod, Meeker, Renville, Sibley, Stearns and 1 more	62 min
Jul 1, 5:27 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti, Sherburne, Wright	48 min
Jul 1, 5:38 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Kanabec, Mille Lacs, Morrison	67 min
Jul 1, 5:52 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Benton, Hennepin, Isanti, Meeker, Mille Lacs and 3 more	53 min
Jul 1, 6:02 PM CDT	Special Weather Statement	MPX	Carver, Hennepin, Scott	43 min
Jul 1, 6:16 PM CDT	Severe Thunderstorm Warning	MPX	Benton, Morrison, Stearns	29 min
Jul 1, 6:20 PM CDT	Tornado Warning	MPX	Benton, Sherburne, Stearns	25 min
Jul 1, 6:27 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti, Kanabec, Mille Lacs	63 min
Jul 1, 6:42 PM CDT	Severe Thunderstorm Warning	MPX	Martin	33 min
Jul 1, 6:56 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Brown, Nicollet	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Severe Thunderstorm Warnings in Wisconsin, 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.