Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 62, NWS La Crosse, WI

July 13, 2012Dodge County, Olmsted County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 13, 2012, 7:38 PM CDT for Dodge County, Olmsted County, Minnesota. It was in force for 52 min. 2 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 13, 2012, 7:38 PM CDT (00:38 UTC)
Expired: Jul 13, 2012, 8:30 PM CDT
In force: 52 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dodge County, MN, Olmsted County, MN

The radar

The La Crosse radar (KARX), 118 km from the middle of the area, began a volume at 00:37 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 13, 7:49 PM CDT	TSTM WND GST 50	4 Nw Rochester, MN
Jul 13, 8:24 PM CDT	TSTM WND GST 60	Hayfield, 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 00:00Z, 0.6 hours before the alert went out and 123 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: 286 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1653 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 137 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.

834 
WUUS53 KARX 140038
SVRARX
MNC039-109-140130-
/O.NEW.KARX.SV.W.0062.120714T0038Z-120714T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
738 PM CDT FRI JUL 13 2012

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

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

* UNTIL 830 PM CDT

* AT 737 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM BYRON TO
  HAYFIELD...MOVING EAST AT 20 MPH. THESE STORMS CAN PRODUCE QUARTER
  SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  BYRON AROUND 745 PM...
  ROCHESTER AROUND 815 PM...
  STEWARTVILLE AROUND 825 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4414 9283 4414 9232 4411 9232 4411 9231
      4383 9250 4383 9268 4385 9269 4385 9297
      4385 9298
TIME...MOT...LOC 0039Z 273DEG 15KT 4407 9264 4394 9276
WIND...HAIL 60MPH 1.00IN

$$

HALBACH

2 follow-up statements

277 
WWUS53 KARX 140051
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
751 PM CDT FRI JUL 13 2012

MNC039-109-140130-
/O.CON.KARX.SV.W.0062.000000T0000Z-120714T0130Z/
DODGE MN-OLMSTED MN-
751 PM CDT FRI JUL 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
OLMSTED AND EASTERN DODGE COUNTIES UNTIL 830 PM CDT...

TRAINED WEATHER SPOTTERS REPORTED WINDS OF 50 MPH 4 MILES NORTHWEST 
OF ROCHESTER WITH A LINE OF SEVERE THUNDERSTORMS.

AT 747 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM BYRON TO
KASSON...MOVING EAST AT 15 MPH. THESE STORMS CAN PRODUCE DAMAGING
WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  NORTHERN ROCHESTER AROUND 755 PM...
  SOUTHERN ROCHESTER AROUND 815 PM...
  STEWARTVILLE AROUND 825 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.

&&

LAT...LON 4414 9283 4414 9232 4411 9232 4411 9231
      4383 9250 4383 9268 4385 9269 4385 9297
      4385 9298
TIME...MOT...LOC 0050Z 273DEG 15KT 4407 9258 4394 9270
WIND...HAIL 60MPH <.50IN

$$

HALBACH

561 
WWUS53 KARX 140110
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
810 PM CDT FRI JUL 13 2012

MNC039-109-140130-
/O.CON.KARX.SV.W.0062.000000T0000Z-120714T0130Z/
DODGE MN-OLMSTED MN-
810 PM CDT FRI JUL 13 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
OLMSTED AND EASTERN DODGE COUNTIES UNTIL 830 PM CDT...

TRAINED WEATHER SPOTTERS REPORTED WINDS OF 50 MPH 4 MILES NORTHWEST 
OF ROCHESTER WITH A LINE OF SEVERE THUNDERSTORMS.

AT 805 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM ROCHESTER TO
HAYFIELD...MOVING EAST AT 15 MPH. THESE STORMS CAN PRODUCE DAMAGING
WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  STEWARTVILLE AROUND 830 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.

&&

LAT...LON 4414 9283 4414 9232 4411 9232 4411 9231
      4383 9250 4383 9268 4385 9269 4385 9297
      4385 9298
TIME...MOT...LOC 0110Z 273DEG 15KT 4404 9241 4392 9270
WIND...HAIL 60MPH <.50IN

$$

HALBACH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:05 PM CDT	Severe Thunderstorm Warning	ARX	Dodge	25 min
Jul 13, 8:30 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower, Olmsted	29 min
Jul 13, 8:40 PM CDT	Areal Flood Advisory	ARX	Dodge	3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2012 Every severe thunderstorm warning in 2012

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.