Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 78, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 19, 2012, 7:42 PM CDT for Polk County, Saint Croix County, Wisconsin. It was in force for 63 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 19, 2012, 7:42 PM CDT (00:42 UTC)
- Expired
- May 19, 2012, 8:45 PM CDT
- In force
- 63 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 91 km from the middle of the area, began a volume at 00:44 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, 0.7 hours before the alert went out and 93 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
- 1062 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 2089 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
628
WUUS53 KMPX 200042
SVRMPX
WIC095-109-200145-
/O.NEW.KMPX.SV.W.0078.120520T0042Z-120520T0145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
742 PM CDT SAT MAY 19 2012
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
POLK COUNTY IN NORTHWEST WISCONSIN...
ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 845 PM CDT
* AT 739 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING DAMAGING WINDS OF 60 MPH. THIS STORM WAS LOCATED NEAR
CUSHING...OR ABOUT 10 MILES NORTHWEST OF BALSAM LAKE...AND MOVING
NORTHEAST AT 35 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.
LOCATIONS IN THE WARNING INCLUDE...
AMERY...
NEW RICHMOND...
BALSAM LAKE...
CENTURIA...
ST CROIX FALLS...
DRESSER...
OSCEOLA...
WANDEROOS...
STAR PRAIRIE...
CLEAR LAKE...
DEER PARK...
SOMERSET...
CYLON...
FOREST...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND HAIL. SEEK SHELTER NOW INSIDE
A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.
&&
LAT...LON 4486 9217 4486 9276 4495 9275 4506 9278
4511 9274 4515 9276 4531 9273 4544 9264
4547 9270 4564 9266 4565 9254 4573 9252
4573 9216
TIME...MOT...LOC 0042Z 227DEG 32KT 4553 9262
WIND...HAIL 60MPH 0.88IN
$$1 follow-up statement
303
WWUS53 KMPX 200109
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
809 PM CDT SAT MAY 19 2012
WIC095-109-200145-
/O.CON.KMPX.SV.W.0078.000000T0000Z-120520T0145Z/
ST. CROIX WI-POLK WI-
809 PM CDT SAT MAY 19 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR POLK AND ST.
CROIX COUNTIES UNTIL 845 PM CDT...
AT 807 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. THESE
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM CLAM FALLS TO BALSAM
LAKE TO SOMERSET...MOVING NORTHEAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
NEW RICHMOND...AMERY...BALDWIN...CLAM FALLS...WANDEROOS...
WOODVILLE...STAR PRAIRIE...HERSEY...WILSON...CYLON...EMERALD...DEER
PARK...GLENWOOD CITY...FOREST AND CLEAR LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...LARGE HAIL...AND DEADLY LIGHTNING. FOR YOUR PROTECTION MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
&&
LAT...LON 4486 9217 4486 9276 4495 9275 4506 9278
4511 9274 4515 9276 4531 9273 4544 9264
4547 9270 4564 9266 4565 9254 4573 9252
4573 9216
TIME...MOT...LOC 0109Z 227DEG 32KT 4566 9232 4545 9245
4512 9262
WIND...HAIL <50MPH 1.00IN
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:05 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 55 min |
| May 19, 7:31 PM CDT | Severe Thunderstorm Warning | MPX | Polk | 59 min |
| May 20, 12:38 PM CDT | Special Weather Statement | MPX | Eau Claire | 52 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012
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.