Alert archive / Wisconsin / Tornado Warnings in 2018

Tornado Warning 7, NWS Green Bay, WI

August 28, 2018Calumet County, Manitowoc County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Aug 28, 2018, 4:27 PM CDT for Calumet County, Manitowoc County, Wisconsin. It was in force for 18 min. 8 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
Aug 28, 2018, 4:27 PM CDT (21:27 UTC)
Expired
Aug 28, 2018, 4:45 PM CDT
In force
18 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

Counties Calumet County, WI, Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 59 km from the middle of the area, began a volume at 21:26 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 28, 4:30 PM CDTTSTM WND DMG2 Sse Meggers, WIBARN DOWN ON HWY X AND 67. DELAYED REPORT TIME ESTIMATED BY RADAR.
Aug 28, 4:30 PM CDTTSTM WND DMGNew Holstein, WILOTS OF TREES DOWN IN NEW HOLSTEIN. DELAYED REPORT BY LAW ENFORCEMENT. ESTIMATED TIME FROM PREVIOUS REPORT OF MESONET GUST.
Aug 28, 4:30 PM CDTTSTM WND GST 54New Holstein, WI
Aug 28, 4:30 PM CDTTSTM WND GST 60New Holstein, WI
Aug 28, 4:33 PM CDTTORNADO3 N Kiel, WIBRIEF TORNADO DESTROYED A BARN AND DAMAGED A FEW TREES ABOUT 2.5 MILES NORTH OF KIEL NEAR THE CALUMET/MANITOWOC COUNTY LINE. OTHER WIND DAMAGE NEAR NEW HOLSTEIN AND EAST OF KIEL WAS A RESULT OF STRAIGHT-LINE WINDS ASSOCIATED WITH SAME STORM SYSTEM.
Aug 28, 4:35 PM CDTTSTM WND DMGKiel, WINUMEROUS TREES AND POWER LINES DOWN AROUND THE KIEL AREA. DELAYED REPORT TIME ESTIMATED BY RADAR.
Aug 28, 4:35 PM CDTTSTM WND DMGKiel, WITREES AND POWERLINES DOWN IN CITY.
Aug 28, 4:44 PM CDTTSTM WND GST 604 E Kiel, WI

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.

IssuedProductOfficeLasted
Aug 28, 1:14 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.5 hours before the alert went out and 57 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 2018-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 41 joules per kilogram.LCLLFCEL10008507005003002001001 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 2018-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 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
41 J/kg
Mixed-layer CIN
-407 J/kg
Mixed-layer LCL
1253 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
152 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

912 
WFUS53 KGRB 282127
TORGRB
WIC015-071-282145-
/O.NEW.KGRB.TO.W.0007.180828T2127Z-180828T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Green Bay WI
427 PM CDT TUE AUG 28 2018

The National Weather Service in Green Bay has issued a

* Tornado Warning for...
  Southeastern Calumet County in east central Wisconsin...
  Southwestern Manitowoc County in east central Wisconsin...

* Until 445 PM CDT.
    
* At 422 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Chilton, or 17 miles east of Oshkosh, moving east
  at 35 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 dangerous storm will be near...
  Chilton and St Anna around 425 PM CDT.
  St. Nazianz around 445 PM CDT.

Other locations impacted by this tornadic thunderstorm include Louis
Corners, Brant, Killsnake Wildlife Area, Kiel, Jericho, Millhome,
Kloten, New Holstein, Charlesburg and Collins.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4394 8816 4394 8829 4406 8830 4413 8790
      4389 8793 4389 8816
TIME...MOT...LOC 2122Z 267DEG 32KT 4398 8819 

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

$$

EB
2 follow-up statements
795 
WWUS53 KGRB 282133
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
433 PM CDT TUE AUG 28 2018

WIC015-071-282145-
/O.CON.KGRB.TO.W.0007.000000T0000Z-180828T2145Z/
Calumet WI-Manitowoc WI-
433 PM CDT TUE AUG 28 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR
SOUTHEASTERN CALUMET AND SOUTHWESTERN MANITOWOC COUNTIES...
    
At 433 PM CDT, a severe thunderstorm capable of producing a tornado
was located near St. Nazianz, or 14 miles northwest of Howards Grove,
moving east at 40 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 dangerous storm will be near...
  St. Nazianz around 440 PM CDT.

Other locations impacted by this tornadic thunderstorm include Louis
Corners, Killsnake Wildlife Area, Collins, Steinthal, Kiel, Meggers,
Millhome and New Holstein.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4393 8814 4397 8811 4411 8803 4413 8790
      4389 8793 4389 8816
TIME...MOT...LOC 2133Z 269DEG 35KT 4398 8804 

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

$$

KLB
018 
WWUS53 KGRB 282147
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
447 PM CDT TUE AUG 28 2018

WIC015-071-282156-
/O.EXP.KGRB.TO.W.0007.000000T0000Z-180828T2145Z/
Calumet WI-Manitowoc WI-
447 PM CDT TUE AUG 28 2018

...THE TORNADO WARNING FOR SOUTHEASTERN CALUMET AND SOUTHWESTERN
MANITOWOC COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.  However heavy
rain is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
east central Wisconsin.

Remember, a Tornado Warning still remains in effect for southern 
Manitowoc County.

LAT...LON 4393 8814 4397 8811 4411 8803 4413 8790
      4389 8793 4389 8816
TIME...MOT...LOC 2146Z 267DEG 32KT 4399 8787 

$$

KLB

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 7:28 PM CDTSpecial Weather StatementGRBMarathon62 min
Aug 27, 7:48 PM CDTSevere Thunderstorm WarningGRBMarathon, Wood57 min
Aug 27, 8:12 PM CDTSpecial Weather StatementGRBLincoln33 min
Aug 27, 8:30 PM CDTSevere Thunderstorm WarningGRBLanglade, Lincoln, Marathon44 min
Aug 27, 8:44 PM CDTSevere Thunderstorm WarningGRBPortage, Wood48 min
Aug 27, 9:03 PM CDTSpecial Weather StatementGRBForest42 min
Aug 27, 9:08 PM CDTSevere Thunderstorm WarningGRBPortage, Waupaca, Waushara37 min
Aug 27, 9:28 PM CDTSevere Thunderstorm WarningGRBOutagamie, Portage, Shawano, Waupaca47 min
Aug 27, 9:40 PM CDTTornado WarningGRBWaupaca, Waushara, Winnebago35 min
Aug 27, 9:43 PM CDTSpecial Marine WarningGRB62 min
Aug 27, 9:48 PM CDTSevere Thunderstorm WarningGRBOconto, Shawano42 min
Aug 27, 9:59 PM CDTSevere Thunderstorm WarningGRBCalumet, Outagamie, Waupaca, Winnebago38 min
Aug 27, 10:18 PM CDTSpecial Weather StatementGRBBrown42 min
Aug 27, 10:28 PM CDTSpecial Marine WarningGRB92 min
Aug 27, 10:29 PM CDTSpecial Weather StatementGRBDoor61 min
Aug 27, 10:32 PM CDTSevere Thunderstorm WarningGRBBrown, Calumet, Kewaunee, Manitowoc43 min
Aug 27, 10:39 PM CDTSpecial Marine WarningGRB71 min
Aug 27, 10:41 PM CDTSevere Thunderstorm WarningGRBDoor36 min
Aug 27, 11:09 PM CDTAreal Flood AdvisoryGRBCalumet, Manitowoc, Winnebago6 hr
Aug 28, 2:45 AM CDTAreal Flood AdvisoryGRBWaushara3 hr
Aug 28, 4:08 AM CDTFlash Flood WatchGRBBrown, Kewaunee, Outagamie17 hr
Aug 28, 1:37 PM CDTSpecial Weather StatementGRBPortage, Waupaca, Waushara, Wood53 min
Aug 28, 2:03 PM CDTSpecial Weather StatementGRBWaupaca, Waushara, Winnebago42 min
Aug 28, 2:20 PM CDTSpecial Weather StatementGRBOutagamie40 min
Aug 28, 2:35 PM CDTSevere Thunderstorm WarningGRBBrown, Outagamie29 min
Aug 28, 2:36 PM CDTSevere Thunderstorm WarningGRBWaushara39 min
Aug 28, 3:08 PM CDTAreal Flood AdvisoryGRBBrown, Outagamie, Waupaca, Waushara, Winnebago3 hr
Aug 28, 3:24 PM CDTSevere Thunderstorm WarningGRBWaushara, Winnebago51 min
Aug 28, 3:33 PM CDTSpecial Weather StatementGRBKewaunee27 min
Aug 28, 3:50 PM CDTAreal Flood AdvisoryGRBBrown, Calumet, Door, Kewaunee, Manitowoc, Winnebago3 hr
Aug 28, 4:03 PM CDTSevere Thunderstorm WarningGRBBrown, Calumet, Manitowoc, Winnebago42 min
Aug 28, 4:08 PM CDTSpecial Marine WarningGRB112 min
Aug 28, 4:38 PM CDTTornado WarningGRBManitowoc20 min
Aug 28, 4:53 PM CDTFlash Flood WarningGRBCalumet, Outagamie, Winnebago3 hr
Aug 28, 5:55 PM CDTAreal Flood AdvisoryGRBBrown, Outagamie, Waushara, Winnebago3 hr
Aug 28, 6:42 PM CDTAreal Flood AdvisoryGRBCalumet2 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.