Alert archive / Wisconsin / Tornado Warnings in 2011
Tornado Warning 1, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Apr 10, 2011, 4:41 PM CDT for Chippewa County, Eau Claire County, Wisconsin. It was in force for 49 min. 2 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, 4:41 PM CDT (21:41 UTC)
- Expired
- Apr 10, 2011, 5:30 PM CDT
- In force
- 49 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Chippewa County, WI, Eau Claire County, WI
The radar
The La Crosse radar (KARX), 115 km from the middle of the area, began a volume at 21:42 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, 4:48 PM CDT | HAIL 0.75 | Fall Creek, WI | |
| Apr 10, 5:00 PM CDT | HAIL 1 | Fall Creek, WI |
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
Minneapolis, MN (KMPX), launched 12:00Z, 9.7 hours before the alert went out and 189 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
- 552 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 643 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 528 m²/s²
- 0-3 km storm-relative helicity
- 499 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
041
WFUS53 KMPX 102141
TORMPX
WIC017-035-102230-
/O.NEW.KMPX.TO.W.0001.110410T2141Z-110410T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
441 PM CDT SUN APR 10 2011
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN...
EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 530 PM CDT
* AT 440 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 6 MILES WEST OF
BRACKETT...AND MOVING NORTHEAST AT 40 MPH.
* LOCATIONS IN THE WARNING INCLUDE...
EAU CLAIRE...
BRACKETT...
ALTOONA...
FALL CREEK...
LAKE WISSOTA...
BATEMAN...
LUDINGTON...
CADOTT...
BOYD...
STANLEY...
ALLEN...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN WISCONSIN.
&&
LAT...LON 4463 9142 4476 9160 4515 9092 4515 9091
4480 9091
TIME...MOT...LOC 2142Z 237DEG 33KT 4472 9144
$$2 follow-up statements
238
WWUS53 KMPX 102205
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
505 PM CDT SUN APR 10 2011
WIC017-035-102230-
/O.CON.KMPX.TO.W.0001.000000T0000Z-110410T2230Z/
CHIPPEWA WI-EAU CLAIRE WI-
505 PM CDT SUN APR 10 2011
...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN EAU CLAIRE
AND SOUTHEASTERN CHIPPEWA COUNTIES IN WEST CENTRAL WISCONSIN UNTIL
530 PM CDT...
AT 503 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
WAS LOCATED NEAR LUDINGTON...OR 11 MILES SOUTHEAST OF CHIPPEWA
FALLS...MOVING NORTHEAST AT 40 MPH. TRAINED STORM SPOTTERS REPORTED
A WALL CLOUD WITH THIS STORM WEST OF FOSTER.
LOCATIONS IMPACTED INCLUDE...
LUDINGTON...CADOTT...BOYD AND STANLEY AND INTERSTATE 94.
LAT...LON 4470 9126 4495 9127 4515 9092 4515 9091
4480 9091
TIME...MOT...LOC 2205Z 237DEG 33KT 4483 9119
$$087
WWUS53 KMPX 102224
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
524 PM CDT SUN APR 10 2011
WIC017-035-102233-
/O.EXP.KMPX.TO.W.0001.000000T0000Z-110410T2230Z/
CHIPPEWA WI-EAU CLAIRE WI-
524 PM CDT SUN APR 10 2011
...THE TORNADO WARNING FOR NORTHEASTERN EAU CLAIRE AND SOUTHEASTERN
CHIPPEWA COUNTIES IN WEST CENTRAL WISCONSIN WILL EXPIRE AT 530 PM
CDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
A TORNADO WATCH REMAINS IN EFFECT.
REPORT ANY DAMAGE TO YOUR LOCAL LAW ENFORCEMENT FOR RELAY TO THE
NATIONAL WEATHER SERVICE.
LAT...LON 4470 9126 4495 9127 4515 9092 4515 9091
4480 9091
TIME...MOT...LOC 2223Z 237DEG 33KT 4492 9099
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 3:20 PM CDT | Special Weather Statement | MPX | Dunn, Pierce | 25 min |
| Apr 10, 3:34 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Dunn, Pierce, Saint Croix | 41 min |
| Apr 10, 4:07 PM CDT | Special Weather Statement | MPX | Pepin | 23 min |
| Apr 10, 4:09 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn, Eau Claire, Pepin | 51 min |
| Apr 10, 4:19 PM CDT | Special Weather Statement | MPX | Pierce | 41 min |
| Apr 10, 4:19 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Eau Claire, Pepin | 41 min |
| Apr 10, 4:32 PM CDT | Severe Thunderstorm Warning | MPX | Barron, Chippewa, Dunn, Rusk | 43 min |
| Apr 10, 4:43 PM CDT | Tornado Warning | MPX | Barron, Chippewa, Dunn, Rusk | 37 min |
| Apr 10, 4:52 PM CDT | Tornado Warning | MPX | Eau Claire | 23 min |
| Apr 10, 5:00 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn, Rusk | 28 min |
| Apr 10, 5:14 PM CDT | Tornado Warning | MPX | Eau Claire | 16 min |
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.