Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS La Crosse, WI

August 7, 2021Dodge County, Olmsted County, Wabasha County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Aug 7, 2021, 10:33 AM CDT for Dodge County, Olmsted County, Wabasha County, Minnesota. It was in force for 42 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: Aug 7, 2021, 10:33 AM CDT (15:33 UTC)
Expired: Aug 7, 2021, 11:15 AM CDT
In force: 42 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Dodge County, MN, Olmsted County, MN, Wabasha County, MN

The radar

The La Crosse radar (KARX), 107 km from the middle of the area, began a volume at 15:33 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
Aug 7, 10:45 AM CDT	HAIL 1	5 E Douglas, MN	SHORT PERIOD OF QUARTER SIZED HAIL ON THE FAR NORTH SIDE OF ROCHESTER.
Aug 7, 10:52 AM CDT	HAIL 0.75	5 E Douglas, MN	REPORT FROM MPING: DIME (0.75 IN.).

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 3.6 hours before the alert went out and 315 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: 1645 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

754 
WUUS53 KARX 071533
SVRARX
MNC039-109-157-071615-
/O.NEW.KARX.SV.W.0064.210807T1533Z-210807T1615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
1033 AM CDT Sat Aug 7 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Central Olmsted County in southeastern Minnesota...
  South central Wabasha County in southeastern Minnesota...
  East central Dodge County in southeastern Minnesota...

* Until 1115 AM CDT.

* At 1033 AM CDT, a severe thunderstorm was located over Byron, or
  near Rochester, moving east at 30 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Rochester around 1040 AM CDT.
  Eyota around 1105 AM CDT.
  Elgin around 1110 AM CDT.

Other locations impacted by this severe thunderstorm include Ringe,
County Roads 79 And 2, Potsdam, Danesville, Salem Corners, Century
High School and Highway 52 And County 14.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4397 9268 4408 9272 4423 9220 4399 9220
TIME...MOT...LOC 1533Z 253DEG 26KT 4403 9259 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Skow

4 follow-up statements

740 
WWUS53 KARX 071547
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1047 AM CDT Sat Aug 7 2021

MNC039-071557-
/O.CAN.KARX.SV.W.0064.000000T0000Z-210807T1615Z/
Dodge MN-
1047 AM CDT Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DODGE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4399 9257 4411 9262 4423 9220 4402 9220
TIME...MOT...LOC 1547Z 253DEG 26KT 4406 9245 

$$

MNC109-157-071615-
/O.CON.KARX.SV.W.0064.000000T0000Z-210807T1615Z/
Olmsted MN-Wabasha MN-
1047 AM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR NORTHERN OLMSTED AND SOUTH CENTRAL WABASHA COUNTIES...

At 1047 AM CDT, a severe thunderstorm was located near Rochester,
moving east at 30 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Elgin around 1110 AM CDT.

Other locations impacted by this severe thunderstorm include Kings
Park, Ringe, Douglas, County Roads 79 And 2, Potsdam, Apache Mall and
Highway 52 And 55th Northwest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4399 9257 4411 9262 4423 9220 4402 9220
TIME...MOT...LOC 1547Z 253DEG 26KT 4406 9245 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Skow

055 
WWUS53 KARX 071556
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1056 AM CDT Sat Aug 7 2021

MNC109-157-071615-
/O.CON.KARX.SV.W.0064.000000T0000Z-210807T1615Z/
Olmsted MN-Wabasha MN-
1056 AM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR NORTHEASTERN OLMSTED AND SOUTH CENTRAL WABASHA COUNTIES...

At 1054 AM CDT, a severe thunderstorm was located near Rochester,
moving east at 30 mph.

HAZARD...Half dollar size hail.

SOURCE...Law enforcement. At 10:45am, quarter sized hail was 
         reported north of Rochester.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  Elgin around 1110 AM CDT.

Other locations impacted by this severe thunderstorm include Kings 
Park, and Ringe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4401 9249 4413 9254 4423 9220 4402 9220
TIME...MOT...LOC 1554Z 253DEG 26KT 4408 9238 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Skow

525 
WWUS53 KARX 071604
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1104 AM CDT Sat Aug 7 2021

MNC109-157-071615-
/O.CON.KARX.SV.W.0064.000000T0000Z-210807T1615Z/
Olmsted MN-Wabasha MN-
1104 AM CDT Sat Aug 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT
FOR NORTHEASTERN OLMSTED AND SOUTH CENTRAL WABASHA COUNTIES...

At 1104 AM CDT, a severe thunderstorm was located over Elgin, or 11
miles northeast of Rochester, moving east at 30 mph.

HAZARD...Quarter size hail.

SOURCE...Law enforcement.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of
northeastern Olmsted and south central Wabasha Counties, including
the following locations... Viola and County Roads 79 And 2.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4403 9239 4415 9239 4420 9220 4404 9220
TIME...MOT...LOC 1604Z 253DEG 26KT 4410 9228 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

Skow

354 
WWUS53 KARX 071614
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1114 AM CDT Sat Aug 7 2021

MNC109-157-071624-
/O.EXP.KARX.SV.W.0064.000000T0000Z-210807T1615Z/
Olmsted MN-Wabasha MN-
1114 AM CDT Sat Aug 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OLMSTED AND SOUTH
CENTRAL WABASHA COUNTIES WILL EXPIRE AT 1115 AM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small hail
and heavy rain are still possible with this thunderstorm.

LAT...LON 4403 9239 4415 9239 4420 9220 4404 9220
TIME...MOT...LOC 1614Z 253DEG 26KT 4412 9220 

$$

Skow

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:21 AM CDT	Special Weather Statement	ARX	Winona	24 min
Aug 7, 10:29 AM CDT	Special Weather Statement	ARX	Olmsted	31 min
Aug 7, 11:14 AM CDT	Special Weather Statement	ARX	Wabasha	31 min
Aug 7, 11:24 AM CDT	Severe Thunderstorm Warning	ARX	Houston	27 min
Aug 7, 12:12 PM CDT	Special Weather Statement	ARX	Wabasha	18 min
Aug 7, 12:23 PM CDT	Special Weather Statement	ARX	Olmsted	37 min
Aug 7, 12:59 PM CDT	Areal Flood Advisory	ARX	Olmsted, Wabasha, Winona	2 hr
Aug 7, 2:23 PM CDT	Areal Flood Advisory	ARX	Winona	112 min
Aug 7, 3:07 PM CDT	Areal Flood Advisory	ARX	Houston	74 min
Aug 7, 6:18 PM CDT	Flash Flood Watch	ARX	Fillmore, Houston, Olmsted, Wabasha, Winona	35 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021 Every severe thunderstorm warning in 2021

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.