Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 49, NWS Green Bay, WI

August 27, 20184 counties in Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Aug 27, 2018, 10:32 PM CDT for 4 counties in Wisconsin. It was in force for 43 min. 7 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 27, 2018, 10:32 PM CDT (03:32 UTC)
Expired: Aug 27, 2018, 11:15 PM CDT
In force: 43 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Brown County, WI, Calumet County, WI, Kewaunee County, WI, Manitowoc County, WI

The radar

The Green Bay radar (KGRB), 32 km from the middle of the area, began a volume at 03:34 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

Time	Report	Where	Remark
Aug 27, 10:32 PM CDT	TSTM WND DMG	Hilbert, WI	TREE DOWN ON ROAD. TIME ESTIMATED BY RADAR. DELAYED REPORT.
Aug 27, 10:37 PM CDT	TSTM WND DMG	Chilton, WI	TREE BRANCHES AND POWERLINES DOWN. TIME ESTIMATED BY RADAR. DELAYED REPORT.
Aug 27, 10:45 PM CDT	TSTM WND DMG	Hilbert, WI	REPORT OF 10 INCH BRANCH DOWN ON ROADWAY AT HIGHWAY 57 AND MAIN STREET.
Aug 27, 10:53 PM CDT	TSTM WND DMG	Kewaunee, WI	TREE DOWN IN THE CITY
Aug 27, 11:00 PM CDT	TSTM WND GST 48	Manitowoc, WI
Aug 27, 11:02 PM CDT	TSTM WND DMG	Manitowoc, WI	TREE DOWN. TIME ESTIMATED BY RADAR. DELAYED REPORT.
Aug 27, 11:10 PM CDT	TSTM WND DMG	Manitowoc, WI	MULTIPLE REPORTS OF TREES DOWN IN MANITOWOC.

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.

Issued	Product	Office	Lasted
Aug 27, 6:01 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 3.5 hours before the alert went out and 30 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: 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.

783 
WUUS53 KGRB 280332
SVRGRB
WIC009-015-061-071-280415-
/O.NEW.KGRB.SV.W.0049.180828T0332Z-180828T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
1032 PM CDT MON AUG 27 2018

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Brown County in northeastern Wisconsin...
  Kewaunee County in northeastern Wisconsin...
  Northeastern Calumet County in east central Wisconsin...
  Manitowoc County in east central Wisconsin...

* Until 1115 PM CDT.

* At 1032 PM CDT, severe thunderstorms were located along a line
  extending from near Green Bay to near Chilton, moving southeast at
  60 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Green Bay, Manitowoc, Kewaunee, Bay Shore Park, Chilton, Algoma,
  Brillion, Luxemburg, Denmark and Valders.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4402 8824 4466 8798 4466 8793 4463 8792
      4466 8785 4468 8732 4454 8741 4433 8748
      4418 8746 4407 8760 4402 8762
TIME...MOT...LOC 0332Z 295DEG 53KT 4454 8793 4403 8820 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Bersch

3 follow-up statements

261 
WWUS53 KGRB 280347
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1047 PM CDT MON AUG 27 2018

WIC009-015-061-071-280415-
/O.CON.KGRB.SV.W.0049.000000T0000Z-180828T0415Z/
Brown WI-Kewaunee WI-Calumet WI-Manitowoc WI-
1047 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR EASTERN BROWN...KEWAUNEE...NORTHEASTERN CALUMET AND MANITOWOC
COUNTIES...

At 1045 PM CDT, severe thunderstorms were located along a line
extending from near Luxemburg to near St. Nazianz, moving east at 60
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Green Bay, Manitowoc, Kewaunee, Bay Shore Park, Chilton, Algoma,
Brillion, Luxemburg, Denmark and Valders.

A few trees were reported down on the west side of Green Bay at 1025 
pm CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4402 8824 4427 8808 4438 8799 4466 8783
      4468 8732 4454 8741 4433 8748 4418 8746
      4407 8760 4402 8762
TIME...MOT...LOC 0345Z 270DEG 53KT 4447 8770 4396 8797 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

ESB

423 
WWUS53 KGRB 280357
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1057 PM CDT MON AUG 27 2018

WIC009-280406-
/O.CAN.KGRB.SV.W.0049.000000T0000Z-180828T0415Z/
Brown WI-
1057 PM CDT MON AUG 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BROWN COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
northeastern and east central Wisconsin.

LAT...LON 4402 8824 4414 8816 4422 8803 4424 8795
      4424 8789 4426 8789 4427 8785 4433 8781
      4433 8777 4438 8777 4467 8756 4468 8732
      4454 8741 4433 8748 4418 8746 4407 8760
      4402 8762
TIME...MOT...LOC 0356Z 295DEG 53KT 4441 8751 4390 8779 

$$

WIC015-061-071-280415-
/O.CON.KGRB.SV.W.0049.000000T0000Z-180828T0415Z/
Kewaunee WI-Calumet WI-Manitowoc WI-
1057 PM CDT MON AUG 27 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT
FOR KEWAUNEE...EAST CENTRAL CALUMET AND MANITOWOC COUNTIES...

At 1056 PM CDT, severe thunderstorms were located along a line
extending from near Kewaunee to Cleveland, moving southeast at 60
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Manitowoc, Kewaunee, Chilton, Algoma, Brillion, Valders, Two Creeks,
Two Rivers, Cato and Mishicot.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4402 8824 4414 8816 4422 8803 4424 8795
      4424 8789 4426 8789 4427 8785 4433 8781
      4433 8777 4438 8777 4467 8756 4468 8732
      4454 8741 4433 8748 4418 8746 4407 8760
      4402 8762
TIME...MOT...LOC 0356Z 295DEG 53KT 4441 8751 4390 8779 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Bersch

108 
WWUS53 KGRB 280414
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1114 PM CDT MON AUG 27 2018

WIC015-061-071-280424-
/O.EXP.KGRB.SV.W.0049.000000T0000Z-180828T0415Z/
Kewaunee WI-Calumet WI-Manitowoc WI-
1114 PM CDT MON AUG 27 2018

...THE SEVERE THUNDERSTORM WARNING FOR KEWAUNEE...EAST CENTRAL
CALUMET AND MANITOWOC COUNTIES WILL EXPIRE AT 1115 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
northeastern and east central Wisconsin.

LAT...LON 4402 8824 4414 8816 4422 8803 4424 8795
      4424 8789 4426 8789 4427 8785 4433 8781
      4433 8777 4438 8777 4467 8756 4468 8732
      4454 8741 4433 8748 4418 8746 4407 8760
      4402 8762
TIME...MOT...LOC 0414Z 295DEG 53KT 4430 8719 4379 8747 

$$

Kurimski

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 7:28 PM CDT	Special Weather Statement	GRB	Marathon	62 min
Aug 27, 7:48 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Wood	57 min
Aug 27, 8:12 PM CDT	Special Weather Statement	GRB	Lincoln	33 min
Aug 27, 8:30 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon	44 min
Aug 27, 8:44 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Wood	48 min
Aug 27, 9:03 PM CDT	Special Weather Statement	GRB	Forest	42 min
Aug 27, 9:08 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waupaca, Waushara	37 min
Aug 27, 9:28 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Portage, Shawano, Waupaca	47 min
Aug 27, 9:40 PM CDT	Tornado Warning	GRB	Waupaca, Waushara, Winnebago	35 min
Aug 27, 9:43 PM CDT	Special Marine Warning	GRB		62 min
Aug 27, 9:48 PM CDT	Severe Thunderstorm Warning	GRB	Oconto, Shawano	42 min
Aug 27, 9:59 PM CDT	Severe Thunderstorm Warning	GRB	Calumet, Outagamie, Waupaca, Winnebago	38 min
Aug 27, 10:18 PM CDT	Special Weather Statement	GRB	Brown	42 min
Aug 27, 10:28 PM CDT	Special Marine Warning	GRB		92 min
Aug 27, 10:29 PM CDT	Special Weather Statement	GRB	Door	61 min
Aug 27, 10:39 PM CDT	Special Marine Warning	GRB		71 min
Aug 27, 10:41 PM CDT	Severe Thunderstorm Warning	GRB	Door	36 min
Aug 27, 11:09 PM CDT	Areal Flood Advisory	GRB	Calumet, Manitowoc, Winnebago	6 hr
Aug 28, 2:45 AM CDT	Areal Flood Advisory	GRB	Waushara	3 hr
Aug 28, 4:08 AM CDT	Flash Flood Watch	GRB	Brown, Kewaunee, Outagamie	17 hr
Aug 28, 1:37 PM CDT	Special Weather Statement	GRB	Portage, Waupaca, Waushara, Wood	53 min
Aug 28, 2:03 PM CDT	Special Weather Statement	GRB	Waupaca, Waushara, Winnebago	42 min
Aug 28, 2:20 PM CDT	Special Weather Statement	GRB	Outagamie	40 min
Aug 28, 2:35 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Outagamie	29 min
Aug 28, 2:36 PM CDT	Severe Thunderstorm Warning	GRB	Waushara	39 min
Aug 28, 3:08 PM CDT	Areal Flood Advisory	GRB	Brown, Outagamie, Waupaca, Waushara, Winnebago	3 hr
Aug 28, 3:24 PM CDT	Severe Thunderstorm Warning	GRB	Waushara, Winnebago	51 min
Aug 28, 3:33 PM CDT	Special Weather Statement	GRB	Kewaunee	27 min
Aug 28, 3:50 PM CDT	Areal Flood Advisory	GRB	Brown, Calumet, Door, Kewaunee, Manitowoc, Winnebago	3 hr
Aug 28, 4:03 PM CDT	Severe Thunderstorm Warning	GRB	Brown, Calumet, Manitowoc, Winnebago	42 min
Aug 28, 4:08 PM CDT	Special Marine Warning	GRB		112 min
Aug 28, 4:27 PM CDT	Tornado Warning	GRB	Calumet, Manitowoc	18 min
Aug 28, 4:38 PM CDT	Tornado Warning	GRB	Manitowoc	20 min
Aug 28, 4:53 PM CDT	Flash Flood Warning	GRB	Calumet, Outagamie, Winnebago	3 hr
Aug 28, 5:55 PM CDT	Areal Flood Advisory	GRB	Brown, Outagamie, Waushara, Winnebago	3 hr
Aug 28, 6:42 PM CDT	Areal Flood Advisory	GRB	Calumet	2 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2018 Every severe thunderstorm warning 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.