Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 7, NWS La Crosse, WI

May 2, 2021Trempealeau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at May 2, 2021, 5:28 PM CDT for Trempealeau County, Wisconsin. It was in force for 47 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: May 2, 2021, 5:28 PM CDT (22:28 UTC)
Expired: May 2, 2021, 6:15 PM CDT
In force: 47 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Trempealeau County, WI

The radar

The La Crosse radar (KARX), 29 km from the middle of the area, began a volume at 22:28 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.5 hours before the alert went out and 205 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3075 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -80 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

348 
WUUS53 KARX 022228
SVRARX
WIC121-022315-
/O.NEW.KARX.SV.W.0007.210502T2228Z-210502T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
528 PM CDT Sun May 2 2021

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Southeastern Trempealeau County in west central Wisconsin...

* Until 615 PM CDT.

* At 527 PM CDT, a severe thunderstorm was located over Galesville,
  or 13 miles southeast of Arcadia, moving east at 20 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Trempealeau County, including the following
  locations... Peacock Hill, Thimble Park, Ettrick, Camp Decorah and
  Frenchville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4408 9115 4409 9117 4408 9118 4409 9120
      4406 9122 4406 9125 4407 9127 4406 9128
      4407 9131 4404 9133 4403 9139 4412 9140
      4422 9115
TIME...MOT...LOC 2227Z 250DEG 16KT 4408 9134 

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

Rieck

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 4:56 PM CDT	Severe Thunderstorm Warning	ARX	Trempealeau	34 min
May 2, 5:44 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	40 min
May 2, 5:59 PM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Trempealeau	29 min
May 2, 6:52 PM CDT	Severe Thunderstorm Warning	ARX	Monroe, Vernon	38 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.