Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 182, NWS La Crosse, WI

September 20, 2017Adams County, Juneau County, Wisconsin

NWS La Crosse, WI issued this severe thunderstorm warning at Sep 20, 2017, 4:37 PM CDT for Adams County, Juneau County, Wisconsin. It was in force for 23 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
Sep 20, 2017, 4:37 PM CDT (21:37 UTC)
Expired
Sep 20, 2017, 5:00 PM CDT
In force
23 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Adams County, WI, Juneau County, WI

The radar

The La Crosse radar (KARX), 96 km from the middle of the area, began a volume at 21:38 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.6 hours before the alert went out and 162 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, Green Bay/Straub, WI at 12:00Z on 2017-09-20Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2017-09-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.1939Sfc1 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
1099 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

015 
WUUS53 KARX 202137
SVRARX
WIC001-057-202200-
/O.NEW.KARX.SV.W.0182.170920T2137Z-170920T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
437 PM CDT WED SEP 20 2017

The National Weather Service in La Crosse has issued a

* Severe Thunderstorm Warning for...
  Northwestern Juneau County in central Wisconsin...
  Northwestern Adams County in central Wisconsin...

* Until 500 PM CDT

* At 436 PM CDT, a severe thunderstorm was located 8 miles northwest
  of Necedah, or 18 miles northeast of Tomah, moving northeast at 40
  mph.

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

  SOURCE...Radar indicated. 

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

* This severe thunderstorm will be near...
  New Rome around 500 PM CDT. 

Other locations impacted by this severe thunderstorm include Finley,
New Miner, Lake Arrowhead, The Sprague Mather Flowage and Sprague.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4406 9024 4411 9027 4425 9011 4425 8981
      4415 8981
TIME...MOT...LOC 2136Z 228DEG 37KT 4412 9018 

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

Hollan
1 follow-up statement
401 
WWUS53 KARX 202149
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
449 PM CDT WED SEP 20 2017

WIC001-057-202200-
/O.CON.KARX.SV.W.0182.000000T0000Z-170920T2200Z/
Juneau WI-Adams WI-
449 PM CDT WED SEP 20 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR NORTHWESTERN JUNEAU AND NORTHWESTERN ADAMS COUNTIES...

At 449 PM CDT, a severe thunderstorm was located 8 miles south of
Babcock, or 19 miles northwest of Friendship, moving northeast at 35
mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

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

This severe storm will be near...
  New Rome around 500 PM CDT. 

Other locations impacted by this severe thunderstorm include Finley,
New Miner, Lake Arrowhead, The Sprague Mather Flowage and Sprague.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4410 9022 4412 9026 4425 9011 4425 8981
      4415 8981
TIME...MOT...LOC 2149Z 230DEG 30KT 4418 9009 

HAIL...1.50IN
WIND...60MPH
 
$$

Hollan

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 20, 3:12 PM CDTSpecial Weather StatementARXJuneau33 min
Sep 20, 3:44 PM CDTSevere Thunderstorm WarningARXAdams, Juneau46 min
Sep 20, 4:58 PM CDTSevere Thunderstorm WarningARXAdams, Juneau32 min
Sep 20, 6:16 PM CDTSevere Thunderstorm WarningARXCrawford44 min
Sep 20, 6:36 PM CDTAreal Flood AdvisoryARXAdams, Juneau114 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2017Every severe thunderstorm warning in 2017

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.