Alert archive / Wisconsin / Tornado Warnings in 2018

Tornado Warning 10, NWS Green Bay, WI

October 3, 2018Marathon County, Shawano County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Oct 3, 2018, 7:20 PM CDT for Marathon County, Shawano County, Wisconsin. It was in force for 25 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: Oct 3, 2018, 7:20 PM CDT (00:20 UTC)
Expired: Oct 3, 2018, 7:45 PM CDT
In force: 25 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

Counties Marathon County, WI, Shawano County, WI

The radar

The Green Bay radar (KGRB), 102 km from the middle of the area, began a volume at 00:21 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
Oct 3, 7:30 PM CDT	FUNNEL CLOUD	Pike Lake, 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.

Issued	Product	Office	Lasted
Oct 3, 3:31 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.3 hours before the alert went out and 103 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: 500 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1400 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 428 m²/s²
0-3 km storm-relative helicity: 749 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

As transmitted.

348 
WFUS53 KGRB 040020
TORGRB
WIC073-115-040045-
/O.NEW.KGRB.TO.W.0010.181004T0020Z-181004T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Green Bay WI
720 PM CDT WED OCT 3 2018

The National Weather Service in Green Bay has issued a

* Tornado Warning for...
  Southeastern Marathon County in central Wisconsin...
  Western Shawano County in northeastern Wisconsin...

* Until 745 PM CDT.
    
* At 719 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Bevent, or 14 miles southeast of Wausau, moving
  east at 40 mph.

  HAZARD...Tornado and half dollar size hail.

  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...
  Bevent around 730 PM CDT.
  Wittenberg around 745 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Shepley, Elderon, Pike Lake, Norrie, Birnamwood, Eland, Hatley and
Bowler.

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 4471 8954 4483 8957 4500 8899 4480 8897
TIME...MOT...LOC 0019Z 261DEG 35KT 4477 8951 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

RDM

3 follow-up statements

061 
WWUS53 KGRB 040030 RRA
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
730 PM CDT WED OCT 3 2018

WIC073-115-040045-
/O.CON.KGRB.TO.W.0010.000000T0000Z-181004T0045Z/
Marathon WI-Shawano WI-
730 PM CDT WED OCT 3 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHEASTERN MARATHON AND WESTERN SHAWANO COUNTIES...
    
At 729 PM CDT, a severe thunderstorm capable of producing a tornado 
was located just north of Bevent, or 17 miles southeast of Wausau, 
moving east at 40 mph.

HAZARD...Tornado and half dollar size hail.

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...
  Wittenberg around 745 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Shepley, Elderon, Pike Lake, Norrie, Birnamwood, Eland, Hatley,
Whitcomb and Bowler.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4473 8940 4486 8947 4500 8899 4480 8897
TIME...MOT...LOC 0029Z 261DEG 35KT 4479 8936 

TORNADO...RADAR INDICATED
HAIL...1.25IN

$$

RDM

358 
WWUS53 KGRB 040040
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
740 PM CDT WED OCT 3 2018

WIC073-040049-
/O.CAN.KGRB.TO.W.0010.000000T0000Z-181004T0045Z/
Marathon WI-
740 PM CDT WED OCT 3 2018

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

A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Wisconsin.

LAT...LON 4489 8922 4497 8899 4480 8897 4477 8915
      4476 8922
TIME...MOT...LOC 0039Z 261DEG 35KT 4480 8924 

$$

WIC115-040045-
/O.CON.KGRB.TO.W.0010.000000T0000Z-181004T0045Z/
Shawano WI-
740 PM CDT WED OCT 3 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR WESTERN
SHAWANO COUNTY...
        
At 739 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Wittenberg, or 22 miles southeast of Wausau, moving
east at 40 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Weather spotters reported a funnel cloud northeast of 
         Elderon. 

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
western Shawano County, including the following locations... Shepley,
Eland, Whitcomb and Bowler.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4489 8922 4497 8899 4480 8897 4477 8915
      4476 8922
TIME...MOT...LOC 0039Z 261DEG 35KT 4480 8924 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

RDM

695 
WWUS53 KGRB 040046
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
746 PM CDT WED OCT 3 2018

WIC115-040055-
/O.EXP.KGRB.TO.W.0010.000000T0000Z-181004T0045Z/
Shawano WI-
746 PM CDT WED OCT 3 2018

...THE TORNADO WARNING FOR WESTERN SHAWANO COUNTY HAS EXPIRED...
    
A new Tornado Warning has been issued for western Shawano County 
until 815 pm.

LAT...LON 4489 8922 4497 8899 4480 8897 4477 8915
      4476 8922
TIME...MOT...LOC 0045Z 261DEG 35KT 4481 8918 

$$

Kurimski

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 3, 7:07 PM CDT	Tornado Warning	GRB	Langlade, Menominee, Shawano	23 min
Oct 3, 7:08 PM CDT	Special Weather Statement	GRB	Marathon	52 min
Oct 3, 7:29 PM CDT	Severe Thunderstorm Warning	GRB	Menominee, Oconto	19 min
Oct 3, 7:44 PM CDT	Tornado Warning	GRB	Menominee, Shawano	18 min
Oct 3, 8:18 PM CDT	Special Weather Statement	GRB	Marathon, Portage, Wood	42 min
Oct 3, 8:44 PM CDT	Special Weather Statement	GRB	Florence, Forest, Langlade, Menominee, Portage, Shawano and 1 more	61 min
Oct 3, 9:00 PM CDT	Special Weather Statement	GRB	Kewaunee	45 min
Oct 3, 9:18 PM CDT	Special Weather Statement	GRB	Marinette, Menominee, Oconto, Outagamie, Shawano, Waupaca and 2 more	42 min
Oct 3, 9:59 PM CDT	Special Weather Statement	GRB	Brown, Calumet, Door, Kewaunee, Manitowoc, Marinette and 7 more	61 min
Oct 3, 10:54 PM CDT	Special Weather Statement	GRB	Manitowoc	36 min
Oct 3, 10:55 PM CDT	Special Weather Statement	GRB	Door	50 min
Oct 4, 6:32 AM CDT	Small Craft Advisory	GRB		9 hr

Nearby

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