Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 7, NWS Green Bay, WI

April 10, 2011Kewaunee County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Apr 10, 2011, 9:19 PM CDT for Kewaunee County, Wisconsin. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 10, 2011, 9:19 PM CDT (02:19 UTC)
Expired: Apr 10, 2011, 9:45 PM CDT
In force: 26 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Kewaunee County, WI

The radar

The Green Bay radar (KGRB), 39 km from the middle of the area, began a volume at 02:20 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.

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 00:00Z, 2.3 hours before the alert went out and 38 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: 1647 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 1073 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 399 m²/s²
0-3 km storm-relative helicity: 397 m²/s²
Significant tornado parameter: 4.2
Supercell composite: 11.4

Open this sounding in Storm Lab

The text

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

147 
WUUS53 KGRB 110219
SVRGRB
WIC061-110245-
/O.NEW.KGRB.SV.W.0007.110411T0219Z-110411T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
919 PM CDT SUN APR 10 2011

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KEWAUNEE COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 945 PM CDT

* AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  NORTHEAST OF DENMARK...OR 11 MILES SOUTHWEST OF KEWAUNEE...AND
  MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KEWAUNEE AROUND 930 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT
OR SMALL INTERIOR ROOM.

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 4447 8776 4453 8747 4452 8747 4433 8753
      4433 8776
TIME...MOT...LOC 0219Z 262DEG 38KT 4439 8765
WIND...HAIL 60MPH 1.00IN

$$

KIECKBUSCH

2 follow-up statements

406 
WWUS53 KGRB 110226
SVSGRB

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

WIC061-110245-
/O.CON.KGRB.SV.W.0007.000000T0000Z-110411T0245Z/
KEWAUNEE WI-
926 PM CDT SUN APR 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
KEWAUNEE COUNTY UNTIL 945 PM CDT...

AT 924 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
SOUTHWEST OF KEWAUNEE...MOVING EAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF SOUTHERN
KEWAUNEE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.

&&

LAT...LON 4447 8776 4453 8747 4452 8747 4433 8753
      4433 8776
TIME...MOT...LOC 0226Z 265DEG 38KT 4439 8754
WIND...HAIL 60MPH 1.00IN

$$

KIECKBUSCH

182 
WWUS53 KGRB 110236
SVSGRB

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

WIC061-110246-
/O.EXP.KGRB.SV.W.0007.000000T0000Z-110411T0245Z/
KEWAUNEE WI-
936 PM CDT SUN APR 10 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN KEWAUNEE COUNTY HAS
BEEN CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4447 8776 4453 8747 4452 8747 4433 8753
      4433 8776
TIME...MOT...LOC 0236Z 265DEG 38KT 4440 8739

$$

KIECKBUSCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:11 PM CDT	Severe Thunderstorm Warning	GRB	Waushara	34 min
Apr 10, 7:15 PM CDT	Tornado Warning	GRB	Forest, Langlade, Oneida	30 min
Apr 10, 7:27 PM CDT	Tornado Warning	GRB	Waushara	33 min
Apr 10, 7:29 PM CDT	Tornado Warning	GRB	Outagamie, Waupaca	46 min
Apr 10, 7:42 PM CDT	Tornado Warning	GRB	Florence, Forest, Marinette	48 min
Apr 10, 7:56 PM CDT	Tornado Warning	GRB	Outagamie, Waupaca, Waushara, Winnebago	34 min
Apr 10, 8:10 PM CDT	Areal Flood Advisory	GRB	Calumet, Outagamie, Winnebago	117 min
Apr 10, 8:29 PM CDT	Tornado Warning	GRB	Winnebago	31 min
Apr 10, 8:29 PM CDT	Tornado Warning	GRB	Brown, Calumet, Outagamie, Winnebago	31 min
Apr 10, 8:56 PM CDT	Tornado Warning	GRB	Calumet, Winnebago	34 min
Apr 10, 9:00 PM CDT	Tornado Warning	GRB	Brown	30 min
Apr 10, 9:02 PM CDT	Special Marine Warning	GRB		106 min
Apr 10, 9:16 PM CDT	Tornado Warning	GRB	Manitowoc	29 min
Apr 10, 9:34 PM CDT	Tornado Warning	GRB	Manitowoc	26 min
Apr 10, 9:46 PM CDT	River Flood Warning	GRB	Marathon, Portage	4 days
Apr 10, 9:46 PM CDT	River Flood Warning	GRB	Portage, Wood	63 hr
Apr 10, 10:13 PM CDT	River Flood Warning	GRB	Outagamie	24 days
Apr 10, 10:13 PM CDT	River Flood Warning	GRB	Outagamie, Waupaca	12 days
Apr 10, 10:13 PM CDT	River Flood Warning	GRB	Waupaca	60 hr
Apr 11, 10:14 AM CDT	River Flood Warning	GRB	Marathon	46 hr
Apr 11, 11:46 AM CDT	River Flood Warning	GRB	Lincoln	45 hr

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2011 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.