Alert archive / Wisconsin / Tornado Warnings in 2011

Tornado Warning 5, NWS Green Bay, WI

April 10, 2011Waupaca County, Waushara County, Winnebago County, Wisconsin

NWS Green Bay, WI issued this tornado warning at Apr 10, 2011, 6:58 PM CDT for Waupaca County, Waushara County, Winnebago County, Wisconsin. It was in force for 32 min. 4 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 10, 2011, 6:58 PM CDT (23:58 UTC)
Expired: Apr 10, 2011, 7:30 PM CDT
In force: 32 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon

Counties Waupaca County, WI, Waushara County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 68 km from the middle of the area, began a volume at 00:02 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
Apr 10, 7:20 PM CDT	TORNADO	West Bloomfield, WI	EF1 TORNADO. PATH LENGTH APPROX 8 MILES, PATH WIDTH 200 YARDS.
Apr 10, 7:24 PM CDT	TSTM WND DMG	Fremont, WI	HOMES AND BARNS DAMAGED IN THE FREMONT AND READFIELD AREAS IN SOUTHEAST WAUPACA COUNTY. ALSO TREES/POWER LINES DOWN.
Apr 10, 7:34 PM CDT	TSTM WND DMG	1 E Fremont, WI	LARGE BARN CORNER 20 BY 120 FT RIPPED OFF.
Apr 10, 7:40 PM CDT	HAIL 0.75	2 E Wild Rose, WI	60 MPH WIND ALSO

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
Apr 10, 3:19 PM CDT	Tornado Watch PDS	SPC	7 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 12.0 hours before the alert went out and 68 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: 56 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 799 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

481 
WFUS53 KGRB 102358
TORGRB
WIC135-137-139-110030-
/O.NEW.KGRB.TO.W.0005.110410T2358Z-110411T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
658 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN WAUPACA COUNTY IN NORTHEAST WISCONSIN...
  NORTHEASTERN WAUSHARA COUNTY IN CENTRAL WISCONSIN...
  NORTHWESTERN WINNEBAGO COUNTY IN EAST CENTRAL WISCONSIN...

* UNTIL 730 PM CDT

* AT 654 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 6 MILES NORTH OF WAUTOMA...AND MOVING EAST AT 50
  MPH.

* THIS DANGEROUS STORM WILL BE NEAR...
  LAKE POYGAN AND FREMONT AROUND 720 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE SAXEVILLE...
PINE RIVER...POY SIPPI...WEST BLOOMFIELD...TUSTIN...ZITTAU AND
READFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN GREEN BAY.

&&

LAT...LON 4438 8873 4425 8873 4411 8873 4411 8889
      4409 8921 4438 8921
TIME...MOT...LOC 2357Z 262DEG 43KT 4416 8923

$$

KALLAS

2 follow-up statements

060 
WWUS53 KGRB 110014
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
714 PM CDT SUN APR 10 2011

WIC135-137-139-110030-
/O.CON.KGRB.TO.W.0005.000000T0000Z-110411T0030Z/
WAUSHARA WI-WINNEBAGO WI-WAUPACA WI-
714 PM CDT SUN APR 10 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN WAUPACA...
NORTHWESTERN WINNEBAGO AND NORTHEASTERN WAUSHARA COUNTIES UNTIL 730
PM CDT...

AT 711 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 9 MILES WEST OF LAKE POYGAN...OR 10 MILES SOUTH OF
WAUPACA...MOVING EAST AT 40 MPH.

THIS DANGEROUS STORM WILL BE NEAR...
  LAKE POYGAN AROUND 720 PM CDT.
  FREMONT AROUND 725 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE TUSTIN...
ZITTAU AND READFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT SEVERE WEATHER...CONTACT THE NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN GREEN BAY.

&&

LAT...LON 4410 8909 4438 8910 4438 8874 4411 8873
      4411 8889
TIME...MOT...LOC 0014Z 258DEG 36KT 4421 8899

$$

KALLAS

644 
WWUS53 KGRB 110031
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
731 PM CDT SUN APR 10 2011

WIC135-137-139-110041-
/O.EXP.KGRB.TO.W.0005.000000T0000Z-110411T0030Z/
WAUSHARA WI-WINNEBAGO WI-WAUPACA WI-
731 PM CDT SUN APR 10 2011

...THE TORNADO WARNING FOR SOUTHERN WAUPACA...NORTHWESTERN WINNEBAGO
AND NORTHEASTERN WAUSHARA COUNTIES HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA. HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 1100 PM!

REMEMBER...A TORNADO WARNING REMAINS IN EFFECT FOR WAUSHARA COUNTY  
UNTIL 800 PM CDT.

LAT...LON 4410 8909 4438 8910 4438 8874 4411 8873
      4411 8889
TIME...MOT...LOC 0014Z 258DEG 36KT 4421 8899

$$

KALLAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 7:09 PM CDT	Marine Dense Fog Advisory	GRB		15 hr
Apr 9, 9:25 PM CDT	Dense Fog Advisory	GRB	Door, Kewaunee, Manitowoc	6 hr
Apr 9, 11:36 PM CDT	Severe Thunderstorm Warning	GRB	Forest, Oneida, Vilas	39 min
Apr 9, 11:58 PM CDT	Severe Thunderstorm Warning	GRB	Florence	34 min
Apr 10, 3:13 AM CDT	Severe Thunderstorm Warning	GRB	Brown, Oconto, Outagamie, Shawano	30 min
Apr 10, 3:20 AM CDT	Special Marine Warning	GRB		34 min
Apr 10, 3:41 AM CDT	Small Craft Advisory	GRB		42 hr
Apr 10, 10:13 AM CDT	Marine Dense Fog Advisory	GRB		11 hr
Apr 10, 10:20 AM CDT	River Flood Warning	GRB	Wood	4 days
Apr 10, 10:36 AM CDT	River Flood Warning	GRB	Marathon	47 hr
Apr 10, 1:28 PM CDT	River Flood Warning	GRB	Shawano, Waupaca	4 days
Apr 10, 3:38 PM CDT	River Flood Warning	GRB	Marathon	65 hr
Apr 10, 4:10 PM CDT	River Flood Warning	GRB	Lincoln, Marathon	64 hr
Apr 10, 4:17 PM CDT	River Flood Warning	GRB	Wood	41 hr
Apr 10, 4:26 PM CDT	Severe Thunderstorm Warning	GRB	Kewaunee	19 min
Apr 10, 4:28 PM CDT	Special Marine Warning	GRB		45 min
Apr 10, 5:31 PM CDT	Tornado Warning	GRB	Lincoln, Marathon	44 min
Apr 10, 6:04 PM CDT	Severe Thunderstorm Warning	GRB	Portage, Waushara, Wood	56 min
Apr 10, 6:14 PM CDT	Tornado Warning	GRB	Langlade, Lincoln, Marathon, Shawano	46 min
Apr 10, 6:31 PM CDT	Tornado Warning	GRB	Waushara	29 min
Apr 10, 6:40 PM CDT	Tornado Warning	GRB	Langlade, Lincoln	50 min

Nearby

Tornado Warnings in Wisconsin, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.