Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 76, NWS La Crosse, WI

July 23, 2011Fillmore County, Olmsted County, Winona County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 23, 2011, 11:03 AM CDT for Fillmore County, Olmsted County, Winona County, Minnesota. It was in force for 42 min. 5 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 23, 2011, 11:03 AM CDT (16:03 UTC)
Expired: Jul 23, 2011, 11:45 AM CDT
In force: 42 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Fillmore County, MN, Olmsted County, MN, Winona County, MN

The radar

The La Crosse radar (KARX), 60 km from the middle of the area, began a volume at 16:05 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 23, 11:10 AM CDT	TSTM WND DMG	St. Charles, MN	POWER LINES AND TREES DOWN
Jul 23, 11:18 AM CDT	HAIL 0.25	St. Charles, MN
Jul 23, 11:30 AM CDT	TSTM WND GST 60	Altura, MN
Jul 23, 11:40 AM CDT	TSTM WND GST 50	Altura, MN	TREE LIMBS DOWN AND HEAVY RAIN
Jul 23, 11:45 AM CDT	TSTM WND GST 42	4 W Winona, MN	1 INCH RAINFALL

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 23, 10:14 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 4.1 hours before the alert went out and 165 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: 1467 J/kg
Mixed-layer CIN: -142 J/kg
Mixed-layer LCL: 875 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

660 
WUUS53 KARX 231603
SVRARX
MNC045-109-169-231645-
/O.NEW.KARX.SV.W.0076.110723T1603Z-110723T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1103 AM CDT SAT JUL 23 2011

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN FILLMORE COUNTY IN SOUTHEAST MINNESOTA...
  SOUTHEASTERN OLMSTED COUNTY IN SOUTHEAST MINNESOTA...
  WINONA COUNTY IN SOUTHEAST MINNESOTA...

* UNTIL 1145 AM CDT

* AT 1100 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SEVERE THUNDERSTORMS ROUGHLY ALONG A LINE EXTENDING FROM PLAINVIEW
  TO CHATFIELD...MOVING SOUTHEAST AT 35 MPH. THESE STORMS CAN PRODUCE
  QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.  

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  ST. CHARLES AROUND 1110 AM...
  ALTURA AROUND 1120 AM...
  ROLLINGSTONE AROUND 1125 AM...
  LEWISTON AROUND 1130 AM...
  STOCKTON AND GOODVIEW AROUND 1135 AM...
  WINONA AROUND 1140 AM...
  RUSHFORD AROUND 1145 AM...

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 4411 9208 4419 9207 4419 9184 4416 9182
      4408 9166 4406 9165 4402 9155 4385 9166
      4384 9173 4372 9174 4385 9233 4395 9241
TIME...MOT...LOC 1603Z 296DEG 30KT 4412 9211 4385 9222
WIND...HAIL 60MPH 1.00IN

$$

MW

3 follow-up statements

208 
WWUS53 KARX 231620
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1120 AM CDT SAT JUL 23 2011

MNC045-109-169-231645-
/O.CON.KARX.SV.W.0076.000000T0000Z-110723T1645Z/
FILLMORE MN-OLMSTED MN-WINONA MN-
1120 AM CDT SAT JUL 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WINONA...
SOUTHEASTERN OLMSTED AND NORTHEASTERN FILLMORE COUNTIES UNTIL 1145 AM
CDT...

AT 1119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM ALTURA TO
LEWISTON TO LANESBORO...MOVING SOUTHEAST AT 40 MPH. THESE STORMS CAN
PRODUCE NICKEL SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  STOCKTON AND GOODVIEW AROUND 1130 AM...
  WINONA AND RUSHFORD AROUND 1135 AM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM SATURDAY
AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN
WISCONSIN.

&&

LAT...LON 4411 9208 4419 9207 4419 9184 4416 9182
      4408 9166 4406 9165 4402 9155 4385 9166
      4384 9173 4372 9174 4385 9233 4395 9241
TIME...MOT...LOC 1620Z 294DEG 37KT 4407 9191 4391 9183
          4384 9197
WIND...HAIL 60MPH <.50IN

$$

MW

683 
WWUS53 KARX 231632
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1132 AM CDT SAT JUL 23 2011

MNC109-231642-
/O.CAN.KARX.SV.W.0076.000000T0000Z-110723T1645Z/
OLMSTED MN-
1132 AM CDT SAT JUL 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN OLMSTED COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND 
MOVED EAST OF OLMSTED COUNTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM CDT
SATURDAY AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.

LAT...LON 4415 9203 4416 9182 4408 9166 4406 9165
      4402 9155 4385 9166 4384 9173 4372 9174
      4380 9209
TIME...MOT...LOC 1632Z 292DEG 37KT 4403 9174 4387 9166
          4380 9180

$$

MNC045-169-231645-
/O.CON.KARX.SV.W.0076.000000T0000Z-110723T1645Z/
FILLMORE MN-WINONA MN-
1132 AM CDT SAT JUL 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WINONA AND
NORTHEASTERN FILLMORE COUNTIES UNTIL 1145 AM CDT...

AT 1110 AM...TREES AND POWER LINES WERE REPORTED DOWN IN SAINT 
CHARLES WITH THESE SEVERE THUNDERSTORMS.

AT 1128 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WERE ROUGHLY ALONG A LINE EXTENDING FROM STOCKTON TO
RUSHFORD...MOVING EAST AT 45 MPH. THESE STORMS CAN PRODUCE NICKEL
SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM SATURDAY
AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND SOUTHWESTERN
WISCONSIN.

&&

LAT...LON 4415 9203 4416 9182 4408 9166 4406 9165
      4402 9155 4385 9166 4384 9173 4372 9174
      4380 9209
TIME...MOT...LOC 1632Z 292DEG 37KT 4403 9174 4387 9166
          4380 9180
WIND...HAIL 60MPH <.50IN

$$

MW

133 
WWUS53 KARX 231644
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1144 AM CDT SAT JUL 23 2011

MNC045-169-231652-
/O.EXP.KARX.SV.W.0076.000000T0000Z-110723T1645Z/
FILLMORE MN-WINONA MN-
1144 AM CDT SAT JUL 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR WINONA AND NORTHEASTERN 
FILLMORE COUNTIES WILL EXPIRE AT 1145 AM CDT...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS. HOWEVER...THE LINE OF STORMS REMAINS STRONG AND COULD
PRODUCE SMALL HAIL AND GUSTY WINDS...IN ADDITION TO LIGHTNING AND
HEAVY RAIN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM CDT
SATURDAY AFTERNOON FOR NORTHEAST IOWA AND SOUTHEAST MINNESOTA AND
SOUTHWESTERN WISCONSIN.

LAT...LON 4415 9203 4416 9182 4408 9166 4406 9165
      4402 9155 4385 9166 4384 9173 4372 9174
      4380 9209
TIME...MOT...LOC 1642Z 292DEG 37KT 4399 9161 4383 9153
          4376 9167

$$

MW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:23 AM CDT	Heat Advisory	ARX	Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more	12 hr
Jul 23, 10:11 AM CDT	Severe Thunderstorm Warning	ARX	Dodge, Olmsted, Wabasha	79 min
Jul 23, 11:38 AM CDT	Severe Thunderstorm Warning	ARX	Houston, Winona	52 min
Jul 23, 11:57 AM CDT	Areal Flood Advisory	ARX	Houston, Winona	76 min

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.