Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 106, NWS Twin Cities, MN

July 1, 2011Chisago County, Washington County, Minnesota; Barron County, Polk County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 1, 2011, 7:24 PM CDT for Chisago County, Washington County, Minnesota; Barron County, Polk County, Saint Croix County, Wisconsin. It was in force for 66 min. 4 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, 7:24 PM CDT (00:24 UTC)
Expired: Jul 1, 2011, 8:30 PM CDT
In force: 66 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Chisago County, MN, Washington County, MN, Barron County, WI, Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 130 km from the middle of the area, began a volume at 00:26 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, 7:30 PM CDT	TSTM WND DMG	1 S Clayton, WI	THREE INCH DIAMETER TREE BRANCH DOWN.
Jul 1, 7:30 PM CDT	TSTM WND DMG	Clayton, WI	LARGE SIX INCH DIAMETER TREE BRANCH FELLED.
Jul 1, 7:41 PM CDT	TSTM WND DMG	1 W Milltown, WI	10 INCH TREE DOWN ON POWER LINES, MULTIPLE OTHER TREES DOWN NEARBY.
Jul 1, 7:55 PM CDT	TSTM WND GST 62	Cumberland, WI	MEASURED AT CUMBERLAND AIRPORT

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 00:00Z, 0.4 hours before the alert went out and 132 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: 4059 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1509 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 20.8

Open this sounding in Storm Lab

The text

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

007 
WUUS53 KMPX 020024
SVRMPX
MNC025-163-WIC005-095-109-020130-
/O.NEW.KMPX.SV.W.0106.110702T0024Z-110702T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
724 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  BARRON COUNTY IN NORTHWEST WISCONSIN...
  POLK COUNTY IN NORTHWEST WISCONSIN...
  NORTHWESTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 830 PM CDT

* AT 721 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 6 MILES SOUTH OF WOLF CREEK TO STILLWATER...AND MOVING
  NORTHEAST AT 50 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  BALSAM LAKE...
  AMERY...
  RICE LAKE...
  SHAFER...
  MARINE ON ST CROIX...
  SCANDIA...
  STILLWATER...
  CENTER CITY...
  LINDSTROM...
  CHISAGO CITY...
  OSCEOLA...
  TAYLORS FALLS...
  SOMERSET...
  ST CROIX FALLS...

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.

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 4537 9155 4503 9290 4534 9295 4564 9243
      4573 9248 4574 9216 4565 9214 4564 9154
TIME...MOT...LOC 0024Z 247DEG 45KT 4549 9270 4511 9275
WIND...HAIL 70MPH 1.00IN

$$

JC

2 follow-up statements

501 
WWUS53 KMPX 020043
SVSMPX

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

MNC025-163-WIC109-020058-
/O.CAN.KMPX.SV.W.0106.000000T0000Z-110702T0130Z/
CHISAGO MN-WASHINGTON MN-ST. CROIX WI-
743 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ST. CROIX...
NORTHEASTERN WASHINGTON AND SOUTHEASTERN CHISAGO COUNTIES IS
CANCELLED...

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

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 4537 9155 4520 9222 4521 9276 4528 9277
      4532 9271 4536 9270 4537 9267 4544 9264
      4549 9269 4564 9243 4573 9248 4574 9217
      4565 9214 4564 9154
TIME...MOT...LOC 0043Z 232DEG 42KT 4564 9249 4520 9251

$$

WIC005-095-020130-
/O.CON.KMPX.SV.W.0106.000000T0000Z-110702T0130Z/
BARRON WI-POLK WI-
743 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR POLK AND
BARRON COUNTIES UNTIL 830 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 70 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM FREDERIC TO STAR PRAIRIE...MOVING
NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  BALSAM LAKE...AMERY...RICE LAKE...WANDEROOS...LUCK...LEWIS...CLEAR
  LAKE...CLAM FALLS...RANGE...MCKINLEY...TURTLE LAKE...COMSTOCK...
  CUMBERLAND...HILLSDALE AND BARRONETT.

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 4537 9155 4520 9222 4521 9276 4528 9277
      4532 9271 4536 9270 4537 9267 4544 9264
      4549 9269 4564 9243 4573 9248 4574 9217
      4565 9214 4564 9154
TIME...MOT...LOC 0043Z 232DEG 42KT 4564 9249 4520 9251
WIND...HAIL 70MPH 1.00IN

$$

JC

332 
WWUS53 KMPX 020117
SVSMPX

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

WIC005-095-020130-
/O.CON.KMPX.SV.W.0106.000000T0000Z-110702T0130Z/
BARRON WI-POLK WI-
817 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR POLK AND
BARRON COUNTIES UNTIL 830 PM CDT...

AT 812 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 10 MILES WEST OF SPOONER TO TURTLE
LAKE...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
  RICE LAKE...CUMBERLAND...HILLSDALE...BARRONETT...BARRON...HAUGEN...
  BRILL...CAMERON...CANTON...MIKANA AND SUMNER.

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. 

THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4537 9155 4520 9221 4544 9264 4549 9269
      4564 9243 4573 9248 4574 9218 4573 9217
      4565 9214 4564 9154
TIME...MOT...LOC 0117Z 232DEG 42KT 4588 9203 4544 9206
WIND...HAIL 70MPH 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, 7:10 PM CDT	Special Weather Statement	MPX	Chisago	35 min
Jul 1, 7:23 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Le Sueur, McLeod, Nicollet, Scott, Sibley	37 min
Jul 1, 7:30 PM CDT	Areal Flood Warning	MPX	Meeker	3 hr
Jul 1, 7:38 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Waseca	37 min
Jul 1, 7:39 PM CDT	Areal Flood Warning	MPX	Benton, Morrison	3 hr
Jul 1, 7:45 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Martin	45 min
Jul 1, 7:49 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Carver, Dakota, Hennepin, Le Sueur, Ramsey and 4 more	56 min
Jul 1, 7:59 PM CDT	Areal Flood Advisory	MPX	Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and 1 more	105 min
Jul 1, 8:03 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Dakota, Faribault, Freeborn, Goodhue, Le Sueur and 3 more	57 min
Jul 1, 8:27 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Washington	63 min
Jul 1, 8:31 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Chisago, Isanti, Washington	59 min
Jul 1, 8:59 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn, Steele, Waseca	61 min
Jul 1, 9:30 PM CDT	Severe Thunderstorm Warning	MPX	Barron, Chippewa, Dunn, Eau Claire, Pepin, Rusk	75 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 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.