Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 64, NWS La Crosse, WI

July 15, 2011Dodge County, Mower County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 15, 2011, 4:04 PM CDT for Dodge County, Mower County, Minnesota. It was in force for 41 min. 3 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 15, 2011, 4:04 PM CDT (21:04 UTC)
Expired: Jul 15, 2011, 4:45 PM CDT
In force: 41 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.5 in
Wind: 60.0 mph

Counties Dodge County, MN, Mower County, MN

The radar

The Minneapolis radar (KMPX), 123 km from the middle of the area, began a volume at 21:05 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 15, 4:19 PM CDT	TSTM WND GST 50	Claremont, MN
Jul 15, 4:28 PM CDT	TSTM WND GST 70	Waltham, MN	SOME FLATTENED CORN NEAR WALTHAM.
Jul 15, 4:46 PM CDT	TSTM WND GST 51	1 Ene Dexter, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.1 hours before the alert went out and 124 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: 1183 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

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

030 
WUUS53 KARX 152104
SVRARX
MNC039-099-152145-
/O.NEW.KARX.SV.W.0064.110715T2104Z-110715T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
404 PM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DODGE COUNTY IN SOUTHEAST MINNESOTA...
  WESTERN MOWER COUNTY IN SOUTHEAST MINNESOTA...

* UNTIL 445 PM CDT

* AT 358 PM...DOPPLER RADAR INDICATED A LINE OF
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM
  CLAREMONT TO HAYFIELD TO 10 MILES WEST OF AUSTIN...MOVING EAST
  AT 35 MPH. THESE STORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF
  60 MPH ALONG WITH HEAVY RAIN.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  HAYFIELD AROUND 410 PM...
  DODGE CENTER AND AUSTIN AROUND 415 PM...
  MANTORVILLE AND KASSON AROUND 420 PM...
  ROSE CREEK AROUND 430 PM...
  ADAMS AROUND 435 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY 
AWAY FROM WINDOWS. WATCH FOR FALLING TREES...BRANCHES BREAKING OFF
AND POSSIBLE FLOODING.

&&

LAT...LON 4420 9304 4420 9267 4385 9268 4385 9269
      4383 9267 4378 9267 4351 9271 4358 9306
TIME...MOT...LOC 2103Z 285DEG 32KT 4411 9297 4384 9294
          4367 9312
WIND...HAIL 60MPH <.50IN

$$

SHEA

3 follow-up statements

091 
WWUS53 KARX 152112
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
412 PM CDT FRI JUL 15 2011

MNC039-099-152145-
/O.CON.KARX.SV.W.0064.000000T0000Z-110715T2145Z/
DODGE MN-MOWER MN-
412 PM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN MOWER
AND DODGE COUNTIES UNTIL 445 PM CDT...

SPOTTERS IN CLAREMONT REPORTED MODERATE TO HEAVY WIND AND VERY HEAVY 
RAIN AS THESE STORMS MOVED THROUGH.

AT 408 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE 
OF SEVERE TO INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS MOST 
OF WESTERN DODGE COUNTY TO JUST NORTHWEST OF AUSTIN MINNESOTA.
THE STRONGEST WIND GUSTS MAY BE NEAR HAYFIELD OR NEAR THE DODGE AND 
MOWER COUNTY LINE OVER THE NEXT 10 MINUTES. IN ADDITION VERY HEAVY 
COULD LEAD TO FLOODING.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  MANTORVILLE AND ROSE CREEK AROUND 420 PM...
  ADAMS AROUND 425 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...PREPARE IMMEDIATELY FOR
DAMAGING WINDS. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

&&

LAT...LON 4420 9304 4420 9267 4385 9268 4385 9269
      4383 9267 4378 9267 4351 9271 4358 9306
TIME...MOT...LOC 2110Z 251DEG 35KT 4416 9288 4389 9285
          4372 9303
WIND...HAIL 60MPH <.50IN

$$

SHEA

329 
WWUS53 KARX 152134
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
434 PM CDT FRI JUL 15 2011

MNC039-099-152145-
/O.CON.KARX.SV.W.0064.000000T0000Z-110715T2145Z/
DODGE MN-MOWER MN-
434 PM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN MOWER
AND DODGE COUNTIES UNTIL 445 PM CDT...

LOCAL LAW ENFORCEMENT OFFICIALS REPORTED WINDS OF 70 MPH AND 
FLATTENED CORN IN PARTS OF MOWER COUNTY AS OF 428 PM.

AT 426 PM...RADAR INDICATED THUNDERSTORMS WERE ROUGHLY ALONG A LINE 
EXTENDING FROM MANTORVILLE TO BROWNSDALE TO AUSTIN...MOVING EAST AT 
30 MPH. THESE STORMS CAN PRODUCE DESTRUCTIVE WINDS IN EXCESS OF 70 
MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  ADAMS AROUND 445 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...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. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY 
AWAY FROM WINDOWS.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

&&

LAT...LON 4420 9287 4420 9268 4390 9269 4384 9269
      4383 9267 4379 9267 4351 9271 4358 9306
TIME...MOT...LOC 2131Z 264DEG 27KT 4406 9272 4379 9269
          4362 9288
WIND...HAIL 70MPH <.50IN

$$

SHEA

163 
WWUS53 KARX 152142
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
442 PM CDT FRI JUL 15 2011

MNC039-152150-
/O.CAN.KARX.SV.W.0064.000000T0000Z-110715T2145Z/
DODGE MN-
442 PM CDT FRI JUL 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR DODGE COUNTY IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS SHIFTED EAST AND 
SOUTH OF THE COUNTY. HEAVY RAIN WILL BEGIN TO LET UP OVER THE NEXT 
HOUR.

LAT...LON 4385 9298 4385 9297 4385 9269 4384 9269
      4383 9267 4379 9267 4351 9271 4358 9306
TIME...MOT...LOC 2140Z 264DEG 27KT 4407 9263 4380 9260
          4363 9279

$$

MNC099-152145-
/O.CON.KARX.SV.W.0064.000000T0000Z-110715T2145Z/
MOWER MN-
442 PM CDT FRI JUL 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN MOWER
COUNTY UNTIL 445 PM CDT...

AT 435 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS FROM NEAR AUSTIN TO NEAR ROCHESTER WITH THE 
POSSIBILITY OF PRODUCING WIND GUSTS OF 70 MPH. EARLIER WINDS HAD 
CAUSED SOME MINOR CROP DAMAGE IN NORTHERN PARTS OF THE COUNTY.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  ADAMS AROUND 445 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...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. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY 
AWAY FROM WINDOWS.

TORRENTIAL RAINFALL FROM THESE STORMS MAY ALSO CAUSE THE PONDING OF
WATER ON ROADWAYS AND LOCALIZED FLOODING.

&&

LAT...LON 4385 9298 4385 9297 4385 9269 4384 9269
      4383 9267 4379 9267 4351 9271 4358 9306
TIME...MOT...LOC 2140Z 264DEG 27KT 4407 9263 4380 9260
          4363 9279
WIND...HAIL 70MPH <.50IN

$$


SHEA

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 3:57 AM CDT	Excessive Heat Watch	ARX	Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more	36 hr
Jul 15, 2:52 PM CDT	Flash Flood Watch	ARX	Dodge, Olmsted, Wabasha, Winona	13 hr
Jul 15, 3:43 PM CDT	Flash Flood Warning	ARX	Dodge, Olmsted, Wabasha	3 hr
Jul 15, 4:33 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Mower, Olmsted	42 min
Jul 15, 4:49 PM CDT	Areal Flood Advisory	ARX	Mower	2 hr
Jul 15, 5:15 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore	45 min
Jul 15, 5:25 PM CDT	Flash Flood Warning	ARX	Mower	3 hr

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.