Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 19, NWS Green Bay, WI

June 10, 2021Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jun 10, 2021, 3:20 PM CDT for Vilas County, Wisconsin. It was in force for 55 min. 6 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: Jun 10, 2021, 3:20 PM CDT (20:20 UTC)
Expired: Jun 10, 2021, 4:15 PM CDT
In force: 55 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Vilas County, WI

The radar

The Marquette radar (KMQT), 152 km from the middle of the area, began a volume at 20:20 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
Jun 10, 3:25 PM CDT	TSTM WND DMG	Boulder Junction, WI	TREES DOWN IN BOULDER JCT - TIME ESTIMATED BY RADAR
Jun 10, 3:30 PM CDT	HAIL 0.5	Conover, WI	DIME SIZE HAIL REPORTED AT HWY K AND HWY 45 IN CONOVER
Jun 10, 3:58 PM CDT	TSTM WND DMG	Sayner, WI	SEVERAL TREES/POWER LINES DOWN. TIME ESTIMATED BY RADAR.
Jun 10, 4:15 PM CDT	HAIL 0.5	Sayner, WI	SOME DEBRIS FROM WIND, PONDING RAIN IN THE BACKYARD
Jun 10, 4:15 PM CDT	HAIL 0.75	Sayner, WI	VIDEO ON SOCIAL MEDIA
Jun 10, 4:18 PM CDT	TSTM WND DMG	St Germain, WI	SEVERAL TREES/POWER LINES DOWN. TIME ESTIMATED BY 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 12:00Z, 8.3 hours before the alert went out and 195 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: 83 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

033 
WUUS53 KGRB 102020
SVRGRB
WIC125-102115-
/O.NEW.KGRB.SV.W.0019.210610T2020Z-210610T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
320 PM CDT Thu Jun 10 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Vilas County in north central Wisconsin...

* Until 415 PM CDT.

* At 320 PM CDT, severe thunderstorms were located along a line
  extending from Boulder Junction to near Eagle River, moving
  southeast at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Eagle River around 335 PM CDT.

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 4614 8909 4607 8893 4598 8893 4598 8905
      4590 8905 4590 8918 4586 8918 4586 8930
      4590 8930 4590 9004 4598 9004 4599 8993
      4630 8993
TIME...MOT...LOC 2020Z 316DEG 12KT 4608 8962 4598 8931 

HAIL...1.00IN
WIND...60MPH
 
$$

Kurimski

3 follow-up statements

587 
WWUS53 KGRB 102039
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
339 PM CDT Thu Jun 10 2021

WIC125-102115-
/O.CON.KGRB.SV.W.0019.000000T0000Z-210610T2115Z/
Vilas WI-
339 PM CDT Thu Jun 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR VILAS COUNTY...

At 339 PM CDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Boulder Junction to near Eagle
River, moving southeast at 10 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Eagle River.

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 4614 8909 4607 8893 4598 8893 4598 8905
      4590 8905 4590 8918 4586 8918 4586 8930
      4590 8930 4590 9004 4598 9004 4599 8993
      4630 8993
TIME...MOT...LOC 2039Z 324DEG 11KT 4601 8957 4596 8927 

HAIL...1.00IN
WIND...60MPH
 
$$

Kurimski

152 
WWUS53 KGRB 102057
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
357 PM CDT Thu Jun 10 2021

WIC125-102115-
/O.CON.KGRB.SV.W.0019.000000T0000Z-210610T2115Z/
Vilas WI-
357 PM CDT Thu Jun 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR SOUTHEASTERN VILAS COUNTY...

At 357 PM CDT, severe thunderstorms were located along a line
extending from 7 miles north of Rainbow Flowage to Eagle River,
moving southeast at 10 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Eagle River, Arbor Vitae, Woodruff, Conover, Sayner, Anvil Lake
Campground, Nixon Lake Natural Area, Upper Buckatabon Springs Natural
Area, Star Lake and St Germain.

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 4608 8914 4598 8905 4590 8905 4590 8918
      4586 8918 4586 8930 4590 8930 4590 8972
      4599 8968 4612 8962
TIME...MOT...LOC 2057Z 316DEG 9KT 4597 8951 4593 8924 

HAIL...1.50IN
WIND...60MPH
 
$$

Kurimski

268 
WWUS53 KGRB 102110
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
410 PM CDT Thu Jun 10 2021

WIC125-102119-
/O.EXP.KGRB.SV.W.0019.000000T0000Z-210610T2115Z/
Vilas WI-
410 PM CDT Thu Jun 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN VILAS COUNTY WILL
EXPIRE AT 415 PM CDT...

The Severe Thunderstorm Warning for southeastern Vilas County will 
be allowed to expire.

However, a new Severe Thunderstorm Warning has been issued for 
southeastern Vilas County until 5 pm.

LAT...LON 4608 8914 4598 8905 4590 8905 4590 8918
      4586 8918 4586 8930 4590 8930 4590 8972
      4599 8968 4612 8962
TIME...MOT...LOC 2109Z 316DEG 12KT 4594 8947 4590 8920 

$$

Kurimski

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 10:09 AM CDT	Marine Dense Fog Advisory	GRB		18 hr
Jun 10, 12:37 PM CDT	Special Weather Statement	GRB	Forest	53 min
Jun 10, 1:21 PM CDT	Special Weather Statement	GRB	Florence, Forest	54 min
Jun 10, 2:17 PM CDT	Special Weather Statement	GRB	Florence, Forest, Oneida	43 min
Jun 10, 4:07 PM CDT	Severe Thunderstorm Warning	GRB	Oneida, Vilas	53 min
Jun 10, 4:17 PM CDT	Special Weather Statement	GRB	Langlade	58 min
Jun 10, 4:31 PM CDT	Severe Thunderstorm Warning	GRB	Langlade, Lincoln	59 min
Jun 10, 4:33 PM CDT	Areal Flood Advisory	GRB	Oneida, Vilas	4 hr
Jun 10, 6:00 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln	60 min
Jun 10, 6:07 PM CDT	Areal Flood Advisory	GRB	Lincoln	3 hr
Jun 10, 6:24 PM CDT	Severe Thunderstorm Warning	GRB	Lincoln, Marathon	66 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every severe thunderstorm warning 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.