Alert archive / Wisconsin / Tornado Warnings in 2011
Tornado Warning 13, NWS Green Bay, WI
NWS Green Bay, WI issued this tornado warning at Apr 10, 2011, 8:56 PM CDT for Calumet County, Winnebago County, Wisconsin. It was in force for 34 min. 1 report 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, 8:56 PM CDT (01:56 UTC)
- Expired
- Apr 10, 2011, 9:30 PM CDT
- In force
- 34 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
Counties Calumet County, WI, Winnebago County, WI
The radar
The Green Bay radar (KGRB), 53 km from the middle of the area, began a volume at 01:56 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, 9:06 PM CDT | TSTM WND GST 64 | Chilton, WI | REPORT FROM A LOCAL SCHOOL |
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, 1.9 hours before the alert went out and 51 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.
178 WFUS53 KGRB 110156 TORGRB WIC015-139-110230- /O.NEW.KGRB.TO.W.0013.110411T0156Z-110411T0230Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GREEN BAY WI 856 PM CDT SUN APR 10 2011 THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A * TORNADO WARNING FOR... CALUMET COUNTY IN EAST CENTRAL WISCONSIN... EXTREME EAST CENTRAL WINNEBAGO COUNTY IN EAST CENTRAL WISCONSIN... * UNTIL 930 PM CDT * AT 852 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 5 MILES EAST OF OSHKOSH...AND MOVING EAST AT 50 MPH. * THIS DANGEROUS STORM WILL BE NEAR... STOCKBRIDGE AROUND 900 PM CDT. CHILTON AROUND 905 PM CDT. BRILLION AROUND 915 PM CDT. OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE STOCKBRIDGE...ST JOHN...HAYTON...HILBERT AND POTTER. 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 4394 8844 4412 8844 4424 8804 4394 8804 TIME...MOT...LOC 0154Z 251DEG 49KT 4403 8836 $$ EB
2 follow-up statements
302 WWUS53 KGRB 110203 SVSGRB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 903 PM CDT SUN APR 10 2011 WIC015-139-110230- /O.CON.KGRB.TO.W.0013.000000T0000Z-110411T0230Z/ WINNEBAGO WI-CALUMET WI- 903 PM CDT SUN APR 10 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR CALUMET AND EAST CENTRAL WINNEBAGO COUNTIES UNTIL 930 PM CDT... AT 900 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED 9 MILES WEST OF CHILTON...OR 10 MILES EAST OF OSHKOSH...MOVING NORTHEAST AT 50 MPH. THIS DANGEROUS STORM WILL BE NEAR... CHILTON AROUND 908 PM CDT. BRILLION AROUND 915 PM CDT. OTHER LOCATIONS IMPACTED BY THIS DANGEROUS STORM INCLUDE HILBERT...ST JOHN AND POTTER. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. TORNADOES ARE DIFFICULT TO SEE AT NIGHT. TAKE COVER NOW. && LAT...LON 4394 8844 4412 8844 4424 8804 4394 8804 TIME...MOT...LOC 0200Z 244DEG 49KT 4407 8826 $$ EB
876 WWUS53 KGRB 110224 SVSGRB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE GREEN BAY WI 924 PM CDT SUN APR 10 2011 WIC015-139-110233- /O.EXP.KGRB.TO.W.0013.000000T0000Z-110411T0230Z/ WINNEBAGO WI-CALUMET WI- 924 PM CDT SUN APR 10 2011 ...THE TORNADO WARNING FOR CALUMET AND EAST CENTRAL WINNEBAGO COUNTIES WILL EXPIRE AT 930 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. GUSTY WINDS TO 50 MPH ARE STILL POSSIBLE. LAT...LON 4394 8844 4412 8844 4424 8804 4394 8804 TIME...MOT...LOC 0223Z 244DEG 49KT 4420 8786 $$ EB
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, 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.