Alert archive / Wisconsin / Tornado Warnings in 2018

Tornado Warning 7, NWS La Crosse, WI

August 27, 2018Juneau County, Monroe County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Aug 27, 2018, 8:30 PM CDT for Juneau County, Monroe County, Wisconsin. It was in force for 30 min. 1 report 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 27, 2018, 8:30 PM CDT (01:30 UTC)
Expired
Aug 27, 2018, 9:00 PM CDT
In force
30 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Juneau County, WI, Monroe County, WI

The radar

The La Crosse radar (KARX), 98 km from the middle of the area, began a volume at 01:30 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
Aug 27, 8:30 PM CDTTSTM WND DMG2 N Tomah, WIREPORT OF A 24-FT CAMPER ROLLED INTO A TRANSFORMER. TIME ESTIMATED FROM RADAR.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.5 hours before the alert went out and 160 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 00:00Z on 2018-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1227 joules per kilogram.LCLLFCEL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 2018-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 198 square meters per square second.1939587897Sfc1 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
1227 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1085 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
198 m²/s²
0-3 km storm-relative helicity
370 m²/s²
Significant tornado parameter
1.1
Supercell composite
13.5

Open this sounding in Storm Lab

The text

As transmitted.

972 
WFUS53 KARX 280130
TORARX
WIC057-081-280200-
/O.NEW.KARX.TO.W.0007.180828T0130Z-180828T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
830 PM CDT MON AUG 27 2018

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Northwestern Juneau County in central Wisconsin...
  Northeastern Monroe County in west central Wisconsin...

* Until 900 PM CDT.
    
* At 829 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Tomah, moving east at 55 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northwestern Juneau and northeastern Monroe Counties, including the
  following locations... Cutler, Wyeville, New Miner, Valley Junction
  and Sprague.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4415 8994 4416 8994 4417 8997 4414 8997
      4413 8999 4413 8997 4412 9001 4410 9001
      4410 9002 4409 9003 4405 9002 4397 9047
      4408 9054 4424 8996 4416 8992
TIME...MOT...LOC 0129Z 248DEG 49KT 4404 9043 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JAM
2 follow-up statements
172 
WWUS53 KARX 280146
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
846 PM CDT MON AUG 27 2018

WIC081-280156-
/O.CAN.KARX.TO.W.0007.000000T0000Z-180828T0200Z/
Monroe WI-
846 PM CDT MON AUG 27 2018

...THE TORNADO WARNING FOR NORTHEASTERN MONROE COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4415 8994 4416 8994 4417 8997 4414 8997
      4412 9001 4410 9001 4410 9002 4409 9003
      4405 9002 4400 9031 4410 9031 4418 8997
      4416 8992
TIME...MOT...LOC 0146Z 253DEG 42KT 4405 9014 

$$

WIC057-280200-
/O.CON.KARX.TO.W.0007.000000T0000Z-180828T0200Z/
Juneau WI-
846 PM CDT MON AUG 27 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
NORTHWESTERN JUNEAU COUNTY...
    
At 846 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Necedah, or 16 miles west of Friendship, moving east
at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Cutler, The Necedah Wildlife Refuge and New Miner. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4415 8994 4416 8994 4417 8997 4414 8997
      4412 9001 4410 9001 4410 9002 4409 9003
      4405 9002 4400 9031 4410 9031 4418 8997
      4416 8992
TIME...MOT...LOC 0146Z 253DEG 42KT 4405 9014 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JAM
735 
WWUS53 KARX 280154
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
854 PM CDT MON AUG 27 2018

WIC057-280204-
/O.EXP.KARX.TO.W.0007.000000T0000Z-180828T0200Z/
Juneau WI-
854 PM CDT MON AUG 27 2018

...THE TORNADO WARNING FOR NORTHWESTERN JUNEAU COUNTY WILL EXPIRE AT
900 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
La Crosse.

LAT...LON 4415 8994 4416 8994 4417 8997 4414 8997
      4412 9001 4410 9001 4410 9002 4409 9003
      4405 9002 4400 9031 4410 9031 4418 8997
      4416 8992
TIME...MOT...LOC 0154Z 248DEG 49KT 4409 9002 

$$

JAM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 7:02 PM CDTSpecial Weather StatementARXClark, Jackson, Taylor58 min
Aug 27, 7:57 PM CDTAreal Flood AdvisoryARXLa Crosse2 hr
Aug 27, 8:34 PM CDTSpecial Weather StatementARXAdams, Juneau, Monroe56 min
Aug 27, 8:57 PM CDTSevere Thunderstorm WarningARXAdams, Juneau33 min
Aug 27, 9:54 PM CDTAreal Flood AdvisoryARXLa Crosse111 min
Aug 27, 10:07 PM CDTFlash Flood WarningARXVernon3 hr
Aug 27, 10:26 PM CDTFlash Flood WarningARXLa Crosse, Monroe3 hr
Aug 27, 11:32 PM CDTFlash Flood WarningARXVernon3 hr
Aug 27, 11:51 PM CDTRiver Flood WarningARXMonroe, Vernon58 hr
Aug 28, 12:07 AM CDTFlash Flood WarningARXAdams, Juneau3 hr
Aug 28, 12:57 AM CDTFlash Flood WarningARXMonroe, Vernon3 hr
Aug 28, 1:36 AM CDTFlash Flood WarningARXLa Crosse114 min
Aug 28, 1:51 AM CDTFlash Flood Warning EmergencyARXLa Crosse, Monroe, Vernon3 hr
Aug 28, 2:54 AM CDTFlash Flood WarningARXAdams, Juneau3 hr
Aug 28, 3:05 AM CDTRiver Flood WarningARXRichland, Vernon55 hr
Aug 28, 3:05 AM CDTRiver Flood WarningARXRichland, Vernon7 days
Aug 28, 3:05 AM CDTRiver Flood WarningARXVernon5 days
Aug 28, 3:05 AM CDTRiver Flood WarningARXCrawford5 days
Aug 28, 3:05 AM CDTRiver Flood WarningARXCrawford14 days
Aug 28, 3:05 AM CDTRiver Flood WarningARXCrawford14 days
Aug 28, 3:38 AM CDTFlash Flood WarningARXLa Crosse, Monroe, Vernon4 hr
Aug 28, 5:43 AM CDTFlash Flood WarningARXAdams, Juneau3 hr
Aug 28, 7:33 AM CDTAreal Flood WarningARXLa Crosse, Monroe, Vernon5 hr
Aug 28, 8:59 AM CDTAreal Flood WarningARXAdams, Juneau5 hr
Aug 28, 12:32 PM CDTAreal Flood WarningARXLa Crosse, Monroe, Vernon6 hr
Aug 28, 1:30 PM CDTSpecial Weather StatementARXJuneau, Monroe60 min
Aug 28, 1:48 PM CDTAreal Flood WarningARXAdams, Juneau33 hr
Aug 28, 1:54 PM CDTSevere Thunderstorm WarningARXJuneau, Monroe, Vernon51 min
Aug 28, 2:27 PM CDTSevere Thunderstorm WarningARXAdams48 min
Aug 28, 2:32 PM CDTTornado WarningARXAdams, Juneau28 min
Aug 28, 2:45 PM CDTTornado WarningARXAdams17 min
Aug 28, 3:07 PM CDTFlash Flood WarningARXAdams, Crawford, Juneau, Monroe, Richland, Vernon6 hr
Aug 28, 6:41 PM CDTAreal Flood WarningARXLa Crosse, Monroe, Vernon12 hr

Nearby

Tornado Warnings in Wisconsin, 2018Every tornado warning in 2018Tornadoes in 2018

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.