Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 4, NWS Green Bay, WI

July 28, 2021Winnebago County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Jul 28, 2021, 11:38 PM CDT for Winnebago County, Wisconsin. It was in force for 16 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: Jul 28, 2021, 11:38 PM CDT (04:38 UTC)
Expired: Jul 28, 2021, 11:54 PM CDT
In force: 16 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Winnebago County, WI

The radar

The Green Bay radar (KGRB), 85 km from the middle of the area, began a volume at 04:38 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.

What was reported inside it

Time	Report	Where	Remark
Jul 28, 11:40 PM CDT	FUNNEL CLOUD	4 Nne Rush Lake, WI	PUBLIC REPORTED A FUNNEL CLOUD BETWEEN HIGHWAY 91 AND RUSH LAKE ROAD. RELAYED VIA EMERGENCY MANAGEMENT

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
Jul 28, 7:17 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.6 hours before the alert went out and 84 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: 593 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 1088 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

654 
WFUS53 KGRB 290438
TORGRB
WIC139-290515-
/O.NEW.KGRB.TO.W.0004.210729T0438Z-210729T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Green Bay WI
1138 PM CDT Wed Jul 28 2021

The National Weather Service in Green Bay has issued a

* Tornado Warning for...
  Southwestern Winnebago County in east central Wisconsin...

* Until 1215 AM CDT.
    
* At 1137 PM CDT, a severe thunderstorm capable of producing a
  tornado was located over Rush Lake, or near Berlin, moving
  southeast at 25 mph.

  HAZARD...Tornado and quarter 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 tornadic thunderstorm will remain over mainly rural areas of
  southwestern Winnebago County, including the following locations...
  Pickett.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4394 8889 4396 8888 4398 8879 4390 8868
      4389 8869 4389 8888
TIME...MOT...LOC 0437Z 328DEG 20KT 4395 8882 

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

$$

EB

2 follow-up statements

231 
WWUS53 KGRB 290451
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1151 PM CDT Wed Jul 28 2021

WIC139-290515-
/O.CON.KGRB.TO.W.0004.000000T0000Z-210729T0515Z/
Winnebago WI-
1151 PM CDT Wed Jul 28 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT FOR SOUTH
CENTRAL WINNEBAGO COUNTY...
    
At 1149 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Rush Lake, or near Ripon, moving southeast at 25
mph.  

A funnel cloud was reported near Rush Lake Road and Highway 91 by 
public.

HAZARD...Tornado and quarter 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.

Locations impacted include...
Pickett.

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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4390 8884 4391 8882 4395 8875 4390 8868
      4389 8869 4389 8888
TIME...MOT...LOC 0449Z 328DEG 20KT 4389 8877 

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

$$

EB

720 
WWUS53 KGRB 290454
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
1154 PM CDT Wed Jul 28 2021

WIC139-290503-
/O.CAN.KGRB.TO.W.0004.000000T0000Z-210729T0515Z/
Winnebago WI-
1154 PM CDT Wed Jul 28 2021

...THE TORNADO WARNING FOR SOUTH CENTRAL WINNEBAGO COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

Remember, a Severe Thunderstorm Warning remains in effect for 
extreme southern Winnebago County. 

LAT...LON 4390 8884 4391 8882 4395 8875 4390 8868
      4389 8869 4389 8888
TIME...MOT...LOC 0452Z 328DEG 20KT 4387 8875 

$$

EB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 7:04 PM CDT	Special Weather Statement	GRB	Lincoln, Oneida, Vilas	41 min
Jul 28, 7:36 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon	39 min
Jul 28, 7:36 PM CDT	Severe Thunderstorm Warning	GRB	Oneida	39 min
Jul 28, 7:52 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln	53 min
Jul 28, 8:20 PM CDT	Special Weather Statement	GRB	Shawano	40 min
Jul 28, 8:37 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln, Marathon, Shawano	53 min
Jul 28, 8:58 PM CDT	Tornado Warning	GRB	Marathon	32 min
Jul 28, 9:05 PM CDT	Areal Flood Advisory	GRB	Langlade, Lincoln, Marathon, Shawano	3 hr
Jul 28, 9:21 PM CDT	Tornado Warning	GRB	Marathon, Portage	24 min
Jul 28, 9:22 PM CDT	Severe Thunderstorm Warning	GRB	Marathon, Portage, Shawano, Waupaca	53 min
Jul 28, 9:54 PM CDT	Tornado Warning	GRB	Portage, Waupaca	36 min
Jul 28, 10:10 PM CDT	Severe Thunderstorm Warning	GRB	Outagamie, Portage, Waupaca, Waushara, Winnebago	65 min
Jul 28, 10:18 PM CDT	Severe Thunderstorm Warning	GRB	Wood	43 min
Jul 28, 10:35 PM CDT	Areal Flood Advisory	GRB	Marathon, Outagamie, Portage, Shawano, Waupaca, Waushara and 1 more	3 hr
Jul 28, 11:12 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waupaca, Waushara, Winnebago	45 min
Jul 29, 3:42 AM CDT	Small Craft Advisory	GRB		23 hr

Nearby

Tornado Warnings in Wisconsin, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.