Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 57, NWS La Crosse, WI

July 27, 2021Fillmore County, Olmsted County, Winona County, Minnesota

NWS La Crosse, WI issued this severe thunderstorm warning at Jul 27, 2021, 9:16 PM CDT for Fillmore County, Olmsted County, Winona County, Minnesota. It was in force for 44 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 27, 2021, 9:16 PM CDT (02:16 UTC)
Expired: Jul 27, 2021, 10:00 PM CDT
In force: 44 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), 90 km from the middle of the area, began a volume at 02:18 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 27, 9:36 PM CDT	TSTM WND GST 40	3 Ene Predmore, MN	TREES BEING BENT OVER BY THE WINDS.
Jul 27, 9:36 PM CDT	TSTM WND GST 50	Chatfield, MN	SPEED ESTIMATED VIA TWITTER VIDEO SENT TO KAAL TV.

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 27, 8:03 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.3 hours before the alert went out and 138 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: 4029 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1142 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

As transmitted.

869 
WUUS53 KARX 280216
SVRARX
MNC045-109-169-280300-
/O.NEW.KARX.SV.W.0057.210728T0216Z-210728T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
916 PM CDT Tue Jul 27 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Southwestern Winona County in southeastern Minnesota...
  Eastern Olmsted County in southeastern Minnesota...
  North central Fillmore County in southeastern Minnesota...

* Until 1000 PM CDT.

* At 915 PM CDT, a severe thunderstorm was located over Eyota, or 11
  miles east of Rochester, moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Public. Quarter sized hail was reported north of Eyota.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Eyota around 920 PM CDT.
  Dover around 930 PM CDT.
  St. Charles around 935 PM CDT.
  Chatfield around 945 PM CDT.

Other locations impacted by this severe thunderstorm include Chester,
Ringe, Saratoga, County Roads 9 And 10, County Roads 137 And 136,
Highway 30 And County 74 and Viola.

This includes Interstate 90 in Minnesota between mile markers 220 and
238.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4414 9234 4413 9232 4411 9232 4411 9226
      4397 9191 4374 9218 4413 9245
TIME...MOT...LOC 0215Z 322DEG 17KT 4401 9225 

HAIL...1.00IN
WIND...60MPH
 
$$

Peters

2 follow-up statements

545 
WWUS53 KARX 280228
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
928 PM CDT Tue Jul 27 2021

MNC045-109-169-280300-
/O.CON.KARX.SV.W.0057.000000T0000Z-210728T0300Z/
Winona MN-Olmsted MN-Fillmore MN-
928 PM CDT Tue Jul 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHWESTERN WINONA...SOUTHEASTERN OLMSTED AND NORTH CENTRAL
FILLMORE COUNTIES...

At 927 PM CDT, a severe thunderstorm was located over Eyota, or 11
miles east of Rochester, moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Public.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Dover around 940 PM CDT.
  St. Charles around 945 PM CDT.
  Chatfield around 1005 PM CDT.

Other locations impacted by this severe thunderstorm include Chester,
Saratoga, County Roads 9 And 10, County Roads 137 And 136, Highway 30
And County 74, Viola and Cummingsville.

This includes Interstate 90 in Minnesota between mile markers 220 and
237.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4411 9226 4393 9196 4374 9218 4410 9243
TIME...MOT...LOC 0227Z 334DEG 13KT 4399 9226 

HAIL...1.00IN
WIND...60MPH
 
$$

Peters

738 
WWUS53 KARX 280240
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
940 PM CDT Tue Jul 27 2021

MNC045-109-169-280300-
/O.CON.KARX.SV.W.0057.000000T0000Z-210728T0300Z/
Winona MN-Olmsted MN-Fillmore MN-
940 PM CDT Tue Jul 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHWESTERN WINONA...SOUTHEASTERN OLMSTED AND NORTH CENTRAL
FILLMORE COUNTIES...

At 939 PM CDT, a severe thunderstorm was located near Eyota, or 13
miles east of Rochester, moving southeast at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Public.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  St. Charles around 945 PM CDT.
  Chatfield around 1005 PM CDT.

Other locations impacted by this severe thunderstorm include Chester,
Saratoga, County Roads 9 And 10, County Roads 137 And 136, Highway 30
And County 74, Cummingsville and Highway 42 And County 9.

This includes Interstate 90 in Minnesota between mile markers 220 and
237.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4405 9220 4393 9196 4374 9218 4404 9239
TIME...MOT...LOC 0239Z 335DEG 14KT 4394 9223 

HAIL...1.00IN
WIND...60MPH
 
$$

Peters

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 8:30 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha, Winona	45 min
Jul 27, 9:48 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Olmsted	42 min
Jul 27, 10:24 PM CDT	Special Weather Statement	ARX	Fillmore	81 min
Jul 28, 8:43 AM CDT	Special Weather Statement	ARX	Dodge, Mower	47 min
Jul 28, 9:17 AM CDT	Special Weather Statement	ARX	Mower, Olmsted, Wabasha	28 min

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.