Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS La Crosse, WI

April 27, 2021Winona County, Minnesota; Buffalo County, Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Apr 27, 2021, 12:26 AM CDT for Winona County, Minnesota; Buffalo County, Trempealeau County, Wisconsin. It was in force for 49 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
Apr 27, 2021, 12:26 AM CDT (05:26 UTC)
Expired
Apr 27, 2021, 1:15 AM CDT
In force
49 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Winona County, MN, Buffalo County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 34 km from the middle of the area, began a volume at 05:27 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.

What was reported inside it

TimeReportWhereRemark
Apr 27, 1:00 AM CDTHAIL 0.882 Ssw Winona, MNCORRECTS PREVIOUS HAIL REPORT FROM LA CRESCENT. SEVERAL ROUNDS OF HAIL FROM PEA TO NICKEL-SIZED.
Apr 27, 1:07 AM CDTHAIL 1.52 Se Winona, MNRELAYED VIA SOCIAL MEDIA.
Apr 27, 1:15 AM CDTHAIL 12 Nw Pickwick, MN
Apr 27, 1:20 AM CDTHAIL 1.252 Se Winona, MNREPORT FROM MPING: HALF DOLLAR (1.25 IN.).
Apr 27, 1:25 AM CDTHAIL 12 S Winona, MNHAIL COVERED THE GROUND.

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, 5.4 hours before the alert went out and 191 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2021-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2021-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 397 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
397 m²/s²
0-3 km storm-relative helicity
378 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

911 
WUUS53 KARX 270526
SVRARX
MNC169-WIC011-121-270615-
/O.NEW.KARX.SV.W.0001.210427T0526Z-210427T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
1226 AM CDT Tue Apr 27 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Winona County in southeastern Minnesota...
  Southeastern Buffalo County in west central Wisconsin...
  Trempealeau County in west central Wisconsin...

* Until 115 AM CDT.

* At 1225 AM CDT, a severe thunderstorm was located over Stockton, or
  near Winona, moving northeast at 55 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Winona and Goodview around 1230 AM CDT.
  Fountain City around 1235 AM CDT.
  Arcadia around 1250 AM CDT.
  Blair around 105 AM CDT.

Other locations impacted by this severe thunderstorm include
Whitewater State Park, Merrick State Park, Czechville, Lock And Dam 5
A, Dodge, County Roads 6 And 33 and Beach Corners.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4405 9208 4449 9117 4408 9115 4409 9120
      4405 9122 4407 9127 4407 9131 4403 9134
      4399 9132 4398 9142 4397 9141 4385 9208
TIME...MOT...LOC 0525Z 239DEG 49KT 4403 9179 

HAIL...1.00IN
WIND...<50MPH
 
$$

DAS
2 follow-up statements
547 
WWUS53 KARX 270539
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1239 AM CDT Tue Apr 27 2021

MNC169-WIC011-121-270615-
/O.CON.KARX.SV.W.0001.000000T0000Z-210427T0615Z/
Winona MN-Buffalo WI-Trempealeau WI-
1239 AM CDT Tue Apr 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR CENTRAL WINONA...SOUTHEASTERN BUFFALO AND TREMPEALEAU COUNTIES...

At 1238 AM CDT, a severe thunderstorm was located near Stockton, or
near Winona, moving northeast at 45 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  Trempealeau around 1255 AM CDT.
  Galesville around 105 AM CDT.
  Blair around 120 AM CDT.

Other locations impacted by this severe thunderstorm include Merrick
State Park, Czechville, Lock And Dam 5 A, Dodge, Beach Corners,
Wyattville and Perrot State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4449 9117 4408 9115 4409 9120 4405 9122
      4407 9127 4407 9131 4403 9134 4399 9132
      4398 9142 4397 9141 4387 9194 4408 9202
TIME...MOT...LOC 0538Z 242DEG 39KT 4402 9171 

HAIL...1.00IN
WIND...<50MPH
 
$$

DAS
283 
WWUS53 KARX 270555
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
1255 AM CDT Tue Apr 27 2021

MNC169-WIC011-121-270615-
/O.CON.KARX.SV.W.0001.000000T0000Z-210427T0615Z/
Winona MN-Buffalo WI-Trempealeau WI-
1255 AM CDT Tue Apr 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT
FOR CENTRAL WINONA...SOUTHEASTERN BUFFALO AND TREMPEALEAU COUNTIES...

At 1253 AM CDT, a severe thunderstorm was located near Winona, 
moving northeast at 45 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  Galesville around 105 AM CDT.
  Blair around 120 AM CDT.

Other locations impacted by this severe thunderstorm include Merrick
State Park, Czechville, Lock And Dam 5 A, Dodge, Beach Corners,
Wyattville and Perrot State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4449 9117 4408 9115 4409 9120 4405 9122
      4407 9127 4407 9131 4403 9134 4399 9132
      4398 9142 4397 9141 4389 9183 4412 9194
TIME...MOT...LOC 0553Z 242DEG 39KT 4409 9151 

HAIL...1.00IN
WIND...<50MPH
 
$$

DAS

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 27, 1:13 AM CDTSevere Thunderstorm WarningARXWinona47 min
Apr 27, 3:56 PM CDTSpecial Weather StatementARXDodge64 min
Apr 27, 4:38 PM CDTSpecial Weather StatementARXOlmsted, Wabasha52 min
Apr 27, 1:25 AM CDTSpecial Weather StatementARXLa Crosse20 min
Apr 27, 1:49 AM CDTSevere Thunderstorm WarningARXLa Crosse41 min
Apr 27, 2:16 AM CDTSpecial Weather StatementARXJackson59 min
Apr 27, 2:33 AM CDTSpecial Weather StatementARXBuffalo, Trempealeau57 min
Apr 27, 3:24 AM CDTSpecial Weather StatementARXAdams36 min
Apr 27, 3:44 AM CDTSpecial Weather StatementARXClark46 min
Apr 27, 4:35 AM CDTSpecial Weather StatementARXTaylor40 min
Apr 27, 5:20 PM CDTSpecial Weather StatementARXTrempealeau55 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021Severe Thunderstorm Warnings in Minnesota, 2021Every 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.