Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 9, NWS Green Bay, WI

April 9, 2017Vilas County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 9, 2017, 11:25 PM CDT for Vilas County, Wisconsin. It was in force for 50 min. 5 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
Apr 9, 2017, 11:25 PM CDT (04:25 UTC)
Expired
Apr 10, 2017, 12:15 AM CDT
In force
50 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), 160 km from the middle of the area, began a volume at 04:25 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
Apr 9, 11:28 PM CDTTSTM WND GST 50Lac Du Flambeau, WIRELAYED FROM A DNR OFFICIAL
Apr 9, 11:28 PM CDTHAIL 1.75Lac Du Flambeau, WI
Apr 9, 11:30 PM CDTTSTM WND DMGWoodruff, WITREES DOWN. DELAYED REPORT. TIME ESTIMATED
Apr 9, 11:30 PM CDTHAIL 12 S Lac Du Flambeau, WIWINDS ESTIMATED 40-45MPH
Apr 10, 12:02 AM CDTHAIL 0.88Conover, WI

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 00:00Z, 4.4 hours before the alert went out and 208 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 00:00Z on 2017-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2017-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 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
1 J/kg
Mixed-layer CIN
-294 J/kg
Mixed-layer LCL
1327 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
270 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

291 
WUUS53 KGRB 100425
SVRGRB
WIC125-100515-
/O.NEW.KGRB.SV.W.0009.170410T0425Z-170410T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service GREEN BAY WI
1125 PM CDT SUN APR 9 2017

The National Weather Service in Green Bay has issued a

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

* Until 1215 AM CDT.

* At 1125 PM CDT, a severe thunderstorm was located over Lac Du
  Flambeau, or 18 miles southeast of Turtle Flambeau Flowage, moving
  northeast at 50 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. 

* This severe thunderstorm will be near,
  Boulder Junction around 1140 PM CDT. 

Other locations impacted by this severe thunderstorm include Arbor
Vitae, Sayner, Land O Lakes, Lac Vieux Desert, Trout Lake, Manitowish
Waters, Star Lake, St Germain, Conover and Presque Isle.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4614 8909 4609 8897 4609 8898 4590 8950
      4590 8993 4598 8997 4599 8993 4614 8993
      4627 8975
TIME...MOT...LOC 0425Z 238DEG 48KT 4593 8985 

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

Eckberg
3 follow-up statements
758 
WWUS53 KGRB 100438
SVSGRB

Severe Weather Statement
National Weather Service GREEN BAY WI
1138 PM CDT SUN APR 9 2017

WIC125-100515-
/O.CON.KGRB.SV.W.0009.000000T0000Z-170410T0515Z/
Vilas WI-
1138 PM CDT SUN APR 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR VILAS COUNTY...

At 1137 PM CDT, a severe thunderstorm was located 7 miles south of
Boulder Junction, or 21 miles west of Eagle River, moving northeast
at 50 mph.

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

SOURCE...Trained weather spotters. 

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. 

This severe storm will be near...
  Boulder Junction around 1145 PM CDT. 

Other locations impacted by this severe thunderstorm include Arbor
Vitae, Sayner, Land O Lakes, Lac Vieux Desert, Trout Lake, Star Lake,
St Germain, Conover, Presque Isle and Woodruff.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail and gusty winds. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.

&&

LAT...LON 4614 8909 4609 8897 4609 8899 4590 8950
      4590 8976 4594 8977 4601 8983 4612 8985
      4627 8975
TIME...MOT...LOC 0437Z 239DEG 43KT 4601 8967 

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

Bersch
000 
WWUS53 KGRB 100447
SVSGRB

Severe Weather Statement
National Weather Service GREEN BAY WI
1147 PM CDT SUN APR 9 2017

WIC125-100515-
/O.CON.KGRB.SV.W.0009.000000T0000Z-170410T0515Z/
Vilas WI-
1147 PM CDT SUN APR 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR CENTRAL VILAS COUNTY...

At 1145 PM CDT, a severe thunderstorm was located 7 miles southeast
of Boulder Junction, or 15 miles northwest of Eagle River, moving
northeast at 60 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Trained weather spotters. 

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

This severe storm will be near...
  Phelps around 1205 AM CDT. 

Other locations impacted by this severe thunderstorm include Sayner,
Star Lake, St Germain, Conover, Land O Lakes and Lac Vieux Desert.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail and gusty winds. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.

&&

LAT...LON 4614 8909 4609 8897 4609 8899 4590 8950
      4593 8953 4595 8954 4604 8961 4611 8964
      4623 8955
TIME...MOT...LOC 0445Z 246DEG 51KT 4605 8950 

HAIL...1.75IN
WIND...60MPH
 
$$

Bersch
414 
WWUS53 KGRB 100459
SVSGRB

Severe Weather Statement
National Weather Service GREEN BAY WI
1159 PM CDT SUN APR 9 2017

WIC125-100515-
/O.CON.KGRB.SV.W.0009.000000T0000Z-170410T0515Z/
Vilas WI-
1159 PM CDT SUN APR 9 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR EAST CENTRAL VILAS COUNTY...

At 1158 PM CDT, a severe thunderstorm was located 8 miles west of
Phelps, or 9 miles north of Eagle River, moving east at 55 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Trained weather spotters. 

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

This severe storm will be near...
  Phelps around 1210 AM CDT. 

Other locations impacted by this severe thunderstorm include Land O
Lakes, Lac Vieux Desert and Conover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 4597 8931 4604 8932 4616 8940 4619 8932
      4614 8909 4609 8897 4609 8899
TIME...MOT...LOC 0458Z 254DEG 46KT 4605 8925 

HAIL...1.75IN
WIND...60MPH
 
$$

Bersch

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 7:13 PM CDTSevere Thunderstorm WarningGRBFlorence, Forest62 min
Apr 9, 8:14 PM CDTSevere Thunderstorm WarningGRBFlorence17 min
Apr 9, 9:17 PM CDTSpecial Weather StatementGRBFlorence58 min
Apr 9, 10:32 PM CDTSpecial Weather StatementGRBVilas88 min
Apr 9, 10:56 PM CDTSpecial Weather StatementGRBVilas79 min
Apr 9, 11:35 PM CDTSevere Thunderstorm WarningGRBLincoln, Oneida55 min
Apr 10, 12:06 AM CDTSevere Thunderstorm WarningGRBForest, Vilas39 min
Apr 10, 12:12 AM CDTSevere Thunderstorm WarningGRBMarathon48 min
Apr 10, 12:23 AM CDTSevere Thunderstorm WarningGRBOneida37 min
Apr 10, 12:27 AM CDTSevere Thunderstorm WarningGRBLincoln63 min
Apr 10, 12:54 AM CDTSevere Thunderstorm WarningGRBFlorence, Forest46 min
Apr 10, 12:59 AM CDTSevere Thunderstorm WarningGRBMarathon31 min
Apr 10, 1:11 AM CDTSevere Thunderstorm WarningGRBLanglade, Oneida33 min
Apr 10, 1:23 AM CDTSevere Thunderstorm WarningGRBMarathon, Menominee, Shawano25 min
Apr 10, 1:51 AM CDTSpecial Weather StatementGRBPortage39 min
Apr 10, 4:20 AM CDTSmall Craft AdvisoryGRB24 hr
Apr 10, 6:03 AM CDTSpecial Marine WarningGRB57 min
Apr 10, 6:32 AM CDTSpecial Weather StatementGRBKewaunee43 min
Apr 10, 6:50 AM CDTSevere Thunderstorm WarningGRBKewaunee25 min
Apr 10, 6:54 AM CDTSpecial Marine WarningGRB96 min
Apr 10, 7:33 AM CDTSpecial Weather StatementGRBMarathon, Portage, Wood27 min
Apr 10, 8:38 AM CDTSpecial Weather StatementGRBMenominee, Outagamie, Shawano, Waupaca37 min
Apr 10, 9:31 AM CDTSpecial Weather StatementGRBMarinette29 min
Apr 10, 10:17 AM CDTRiver Flood AdvisoryGRBFlorence, Marinette36 hr
Apr 10, 10:28 AM CDTRiver Flood AdvisoryGRBFlorence, Marinette4 days
Apr 10, 3:13 PM CDTWinter Weather AdvisoryGRBFlorence, Forest, Langlade, Lincoln, Marinette, Oconto and 2 more18 hr
Apr 10, 6:42 PM CDTSpecial Weather StatementGRBWinnebago33 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2017Every severe thunderstorm warning in 2017

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.