Alert archive / Wisconsin / Tornado Warnings in 2011
Tornado Warning 11, NWS Green Bay, WI
NWS Green Bay, WI issued this tornado warning at Apr 10, 2011, 8:29 PM CDT for Winnebago County, Wisconsin. It was in force for 31 min. 3 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, 8:29 PM CDT (01:29 UTC)
- Expired
- Apr 10, 2011, 9:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
County Winnebago County, WI
The radar
The Green Bay radar (KGRB), 79 km from the middle of the area, began a volume at 01:29 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, 8:50 PM CDT | TSTM WND DMG | 5 Sw Oshkosh, WI | 70-80 MPH |
| Apr 10, 8:50 PM CDT | TSTM WND GST 0 | 5 Sw Oshkosh, WI | 70 TO 80 MPH |
| Apr 10, 8:50 PM CDT | TSTM WND GST 70 | 5 Sw Oshkosh, W | 70 TO 80 MPH |
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 | SPC | 7 hr |
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 1.5 hours before the alert went out and 78 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
355
WFUS53 KGRB 110129
TORGRB
WIC139-110200-
/O.NEW.KGRB.TO.W.0011.110411T0129Z-110411T0200Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
829 PM CDT SUN APR 10 2011
THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHERN WINNEBAGO COUNTY IN EAST CENTRAL WISCONSIN...
* UNTIL 900 PM CDT
* AT 824 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR RUSH LAKE...OR NEAR BERLIN...AND MOVING EAST
AT 40 MPH.
* THIS DANGEROUS STORM WILL BE NEAR...
OSHKOSH AROUND 840 PM CDT.
OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE FISK...
WITTMAN FIELD AND WINNEBAGO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4390 8889 4398 8889 4403 8888 4409 8840
4389 8841 4389 8888
TIME...MOT...LOC 0128Z 249DEG 47KT 4397 8879
$$
EB3 follow-up statements
808
WWUS53 KGRB 110134
SVSGRB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
834 PM CDT SUN APR 10 2011
WIC139-110200-
/O.CON.KGRB.TO.W.0011.000000T0000Z-110411T0200Z/
WINNEBAGO WI-
834 PM CDT SUN APR 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN WINNEBAGO COUNTY
UNTIL 900 PM CDT...
AT 829 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED 5 MILES NORTHEAST OF RUSH LAKE...OR 9 MILES EAST OF
BERLIN...MOVING EAST AT 50 MPH.
THIS IS AN EXTREMELY DANGEROUS STORM! TAKE COVER NOW.
THIS DANGEROUS STORM WILL BE NEAR...
PICKETT...FISK AND OSHKOSH.
OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE WITTMAN
FIELD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4390 8889 4398 8889 4403 8888 4409 8840
4389 8841 4389 8888
TIME...MOT...LOC 0133Z 249DEG 47KT 4399 8870
$$
EB721
WWUS53 KGRB 110142 RRA
SVSGRB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
842 PM CDT SUN APR 10 2011
WIC139-110200-
/O.CON.KGRB.TO.W.0011.000000T0000Z-110411T0200Z/
WINNEBAGO WI-
842 PM CDT SUN APR 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN WINNEBAGO COUNTY
UNTIL 900 PM CDT...
AT 838 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR FISK...OR 8 MILES SOUTHWEST OF
OSHKOSH...MOVING EAST AT 50PH.
THIS IS AN EXTREMELY DANGEROUS STORM. TAKE COVER NOW!
THIS DANGEROUS STORM WILL BE NEAR...
OSHKOSH AND WITTAN FIELD
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW.
&&
LAT...LON 4390 8889 4397 8885 4403 8880 4409 8840
4389 8841 4389 8888
TIME...MOT...LOC 0140Z 257DEG 55KT 4393 8862
$$
EB886
WWUS53 KGRB 110147
SVSGRB
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
847 PM CDT SUN APR 10 2011
WIC139-110200-
/O.CON.KGRB.TO.W.0011.000000T0000Z-110411T0200Z/
WINNEBAGO WI-
847 PM CDT SUN APR 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN WINNEBAGO
COUNTY UNTIL 900 PM CDT...
AT 843 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
STORM WAS LOCATED NEAR OSHKOSH...MOVING EAST AT 50 MPH.
THIS VERY DANGEROUS STORM WILL AFFECT THE CITY OF OSHKOSH.
THIS IS AN EXTREMELY DANGEROUS STORM. TAKE COVER NOW!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4389 8885 4394 8879 4396 8876 4403 8869
4409 8840 4389 8841
TIME...MOT...LOC 0145Z 253DEG 53KT 4398 8857
$$
EBThe 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 | 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, 9:19 PM CDT | Severe Thunderstorm Warning | GRB | Kewaunee | 26 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
Tornado Warnings in Wisconsin, 2011Every tornado warning in 2011Tornadoes 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.