Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 53, NWS La Crosse, WI

July 1, 2011Fillmore County, Olmsted County, Winona County, Minnesota; Howard County, Iowa

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 1, 2011, 10:23 PM CDT for Fillmore County, Olmsted County, Winona County, Minnesota; Howard County, Iowa. It was in force for 37 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: Jul 1, 2011, 10:23 PM CDT (03:23 UTC)
Expired: Jul 1, 2011, 11:00 PM CDT
In force: 37 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 0.5 in
Wind: 60.0 mph

Counties Howard County, IA, Fillmore County, MN, Olmsted County, MN, Winona County, MN

The radar

The La Crosse radar (KARX), 85 km from the middle of the area, began a volume at 03:27 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
Jul 1, 8:07 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.4 hours before the alert went out and 171 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.

603 
WUUS53 KARX 020323
SVRARX
IAC089-MNC045-109-169-020400-
/O.NEW.KARX.SV.W.0053.110702T0323Z-110702T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1023 PM CDT FRI JUL 1 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HOWARD COUNTY IN NORTHEAST IOWA...
  WESTERN FILLMORE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHEASTERN OLMSTED COUNTY IN SOUTHEAST MINNESOTA...
  WESTERN WINONA COUNTY IN SOUTHEAST MINNESOTA...

* UNTIL 1100 PM CDT

* AT 1022 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM
  STEWARTVILLE TO LE ROY TO RICEVILLE...MOVING EAST AT 65 MPH. THESE
  STORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH. LOCAL LAW   
  ENFORCEMENT OFFICIALS HAVE ALREADY REPORTED LARGE TREES DOWN 2     
  MILES SOUTH OF LEROY WITH THESE STORMS.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  LIME SPRINGS AND WYKOFF AROUND 1035 PM...
  PRESTON AND FOUNTAIN AROUND 1040 PM...
  ST. CHARLES AND DOVER AROUND 1045 PM...
  LANESBORO AROUND 1050 PM...
  ALTURA AROUND 1055 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 4410 9186 4374 9195 4350 9204 4350 9208
      4345 9208 4330 9256 4350 9255 4350 9245
      4383 9245 4384 9266
TIME...MOT...LOC 0323Z 248DEG 55KT 4382 9252 4359 9245
          4339 9248
WIND...HAIL 60MPH <.50IN

$$

AJ

2 follow-up statements

479 
WWUS53 KARX 020339
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1039 PM CDT FRI JUL 1 2011

IAC089-MNC045-109-169-020400-
/O.CON.KARX.SV.W.0053.000000T0000Z-110702T0400Z/
HOWARD IA-FILLMORE MN-OLMSTED MN-WINONA MN-
1039 PM CDT FRI JUL 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
WINONA...SOUTHEASTERN OLMSTED...WESTERN FILLMORE AND NORTHERN HOWARD
COUNTIES UNTIL 1100 PM CDT...

AT 1022 PM...74 MPH WINDS WERE REPORTED IN GRAND MEADOW WITH A LINE 
OF SEVERE THUNDERSTORMS.

AT 1036 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM STEWARTVILLE
TO WYKOFF TO LIME SPRINGS...MOVING EAST AT 65 MPH. THESE STORMS CAN
PRODUCE DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  PRESTON AND FOUNTAIN AROUND 1045 PM...
  ST. CHARLES AND DOVER AROUND 1050 PM...
  ALTURA AROUND 1100 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT. CONDITIONS REMAIN
FAVORABLE FOR ADDITIONAL SEVERE THUNDERSTORMS TO DEVELOP.

&&

LAT...LON 4410 9186 4374 9195 4350 9204 4350 9208
      4345 9208 4330 9256 4350 9255 4350 9245
      4383 9245 4384 9266
TIME...MOT...LOC 0338Z 248DEG 55KT 4388 9234 4368 9222
          4347 9219
WIND...HAIL 70MPH <.50IN

$$

AJ

431 
WWUS53 KARX 020359
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1059 PM CDT FRI JUL 1 2011

IAC089-MNC045-109-169-020409-
/O.EXP.KARX.SV.W.0053.000000T0000Z-110702T0400Z/
HOWARD IA-FILLMORE MN-OLMSTED MN-WINONA MN-
1059 PM CDT FRI JUL 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WINONA...SOUTHEASTERN
OLMSTED...WESTERN FILLMORE AND NORTHERN HOWARD COUNTIES WILL EXPIRE
AT 1100 PM CDT...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT. CONDITIONS REMAIN
FAVORABLE FOR ADDITIONAL SEVERE THUNDERSTORMS TO DEVELOP.

LAT...LON 4410 9186 4374 9195 4350 9204 4350 9208
      4345 9208 4330 9256 4350 9255 4350 9245
      4383 9245 4384 9266
TIME...MOT...LOC 0359Z 248DEG 55KT 4400 9193 4380 9181
          4359 9178

$$

AJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 8:32 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower, Olmsted, Wabasha	58 min
Jul 1, 9:21 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Fillmore, Mower, Olmsted, Wabasha, Winona	39 min
Jul 1, 10:02 PM CDT	Severe Thunderstorm Warning	ARX	Mower	43 min
Jul 1, 10:17 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Houston, Winona	58 min
Jul 1, 9:39 PM CDT	Severe Thunderstorm Warning	ARX	Floyd, Mitchell	66 min
Jul 1, 10:50 PM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Floyd, Howard, Mitchell	40 min

Nearby

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