Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 30, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 10, 2011, 11:28 PM CDT for Polk County, Wisconsin. It was in force for 47 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
- May 10, 2011, 11:28 PM CDT (04:28 UTC)
- Expired
- May 11, 2011, 12:15 AM CDT
- In force
- 47 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
County Polk County, WI
The radar
The Minneapolis radar (KMPX), 123 km from the middle of the area, began a volume at 04:31 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 4.5 hours before the alert went out and 125 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
- 4330 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1463 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 183 m²/s²
- 0-3 km storm-relative helicity
- 292 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 33.9
The text
As transmitted, in the capitals the NWS used until 2016.
701
WUUS53 KMPX 110428
SVRMPX
WIC095-110515-
/O.NEW.KMPX.SV.W.0030.110511T0428Z-110511T0515Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1128 PM CDT TUE MAY 10 2011
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN POLK COUNTY IN NORTHWEST WISCONSIN...
* UNTIL 1215 AM CDT
* AT 1127 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM WAS LOCATED NEAR
CUSHING...OR ABOUT 14 MILES NORTHWEST OF BALSAM LAKE...AND
MOVING NORTHEAST AT 25 MPH. THIS STORM HAS A HISTORY OF PRODUCING
HALF DOLLAR SIZE HAIL IN CHISAGO COUNTY.
LOCATIONS IN THE WARNING INCLUDE...
MILLTOWN...
LUCK...
FREDERIC...
LEWIS...
CLAM FALLS...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT WEDNESDAY
MORNING FOR SOUTHEASTERN MINNESOTA.
&&
LAT...LON 4563 9216 4552 9232 4546 9268 4557 9275
4566 9267 4565 9255 4571 9255 4574 9252
4573 9216
TIME...MOT...LOC 0428Z 236DEG 21KT 4560 9265
WIND...HAIL <50MPH 1.25IN
$$2 follow-up statements
827
WWUS53 KMPX 110453
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1153 PM CDT TUE MAY 10 2011
WIC095-110515-
/O.CON.KMPX.SV.W.0030.000000T0000Z-110511T0515Z/
POLK WI-
1153 PM CDT TUE MAY 10 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
POLK COUNTY UNTIL 1215 AM CDT...
AT 1154 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM
WAS LOCATED NEAR FREDERIC...OR 14 MILES NORTH OF BALSAM LAKE...MOVING
NORTHEAST AT 25 MPH.
LOCATIONS IMPACTED INCLUDE...
LEWIS AND CLAM FALLS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
&&
LAT...LON 4563 9216 4552 9232 4548 9255 4571 9255
4574 9252 4573 9216
TIME...MOT...LOC 0454Z 237DEG 20KT 4567 9245
WIND...HAIL <50MPH 1.25IN
$$201
WWUS53 KMPX 110509
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1209 AM CDT WED MAY 11 2011
WIC095-110515-
/O.CON.KMPX.SV.W.0030.000000T0000Z-110511T0515Z/
POLK WI-
1209 AM CDT WED MAY 11 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
POLK COUNTY UNTIL 1215 AM CDT...
AT 1209 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM
WAS LOCATED NEAR LEWIS...OR 18 MILES NORTH OF BALSAM LAKE...MOVING
NORTHEAST AT 25 MPH.
LOCATIONS IMPACTED INCLUDE...
CLAM FALLS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
&&
LAT...LON 4563 9216 4552 9232 4548 9255 4571 9255
4574 9252 4573 9216
TIME...MOT...LOC 0509Z 237DEG 20KT 4572 9235
WIND...HAIL <50MPH 1.25IN
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 9:09 PM CDT | Special Weather Statement | MPX | Polk | 66 min |
| May 10, 10:43 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 47 min |
| May 11, 9:51 AM CDT | Special Weather Statement | MPX | Chippewa, Dunn, Eau Claire | 54 min |
| May 11, 11:01 AM CDT | Special Weather Statement | MPX | Barron, Chippewa, Dunn, Eau Claire, Pepin, Rusk | 74 min |
| May 11, 11:05 AM CDT | Severe Thunderstorm Warning | MPX | Dunn, Pepin | 40 min |
| May 11, 12:43 PM CDT | Special Weather Statement | MPX | Rusk | 47 min |
| May 11, 12:50 PM CDT | Severe Thunderstorm Warning | MPX | Rusk | 25 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2011Every 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.