Alert archive / Wisconsin / Tornado Warnings in 2009
Tornado Warning 45, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 19, 2009, 4:06 PM CDT for Pierce County, Saint Croix County, Wisconsin. It was in force for 39 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
- Aug 19, 2009, 4:06 PM CDT (21:06 UTC)
- Expired
- Aug 19, 2009, 4:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Pierce County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 94 km from the middle of the area, began a volume at 21:07 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 |
|---|---|---|---|
| Aug 19, 4:35 PM CDT | TSTM WND DMG | 3 Nw Esdaile, WI | DAMAGE TO CROPS AND TREES AT THE INTERSECTION OF V AND D |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.1 hours before the alert went out and 97 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
- 368 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 615 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS53 KMPX 192106
TORMPX
WIC093-109-192145-
/O.NEW.KMPX.TO.W.0045.090819T2106Z-090819T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
406 PM CDT WED AUG 19 2009
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* TORNADO WARNING FOR...
SOUTHEASTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...
PIERCE COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 445 PM CDT
* AT 406 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS 2 MILES WEST OF
ELLSWORTH...OR ABOUT 3 MILES SOUTH OF BELDENVILLE...AND MOVING
NORTHEAST AT 30 MPH.
* LOCATIONS IN THE WARNING INCLUDE...
ELLSWORTH...
RIVER FALLS...
BELDENVILLE...
MARTEL...
SPRING VALLEY...
HAMMOND...
BALDWIN...
WOODVILLE...
HERSEY...
WILSON...
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.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 4455 9233 4458 9252 4470 9270 4507 9250
4500 9214 4486 9214
TIME...MOT...LOC 2107Z 207DEG 26KT 4474 9252
$$1 follow-up statement
000
WWUS53 KMPX 192131 RRA
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
431 PM CDT WED AUG 19 2009
WIC093-109-192145-
/O.CON.KMPX.TO.W.0045.000000T0000Z-090819T2145Z/
ST. CROIX WI-PIERCE WI-
431 PM CDT WED AUG 19 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR EASTERN
PIERCE AND SOUTHEASTERN ST. CROIX COUNTIES...
AT 432 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PART OF THE STORM
WAS LOCATED 5 MILES NORTH OF MARTEL...AND MOVING NORTHEAST AT 30 MPH.
LOCATIONS IN THE WARNING INCLUDE...
SPRING VALLEY...HAMMOND...BALDWIN...WOODVILLE...HERSEY AND WILSON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 4461 9230 4474 9249 4499 9254 4507 9250
4500 9214 4486 9214
TIME...MOT...LOC 2132Z 207DEG 26KT 4490 9240
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 2:43 PM CDT | Tornado Warning | MPX | Pierce | 32 min |
| Aug 19, 2:53 PM CDT | Tornado Warning | MPX | Saint Croix | 22 min |
| Aug 19, 2:57 PM CDT | Tornado Warning | MPX | Pierce, Saint Croix | 48 min |
| Aug 19, 3:16 PM CDT | Tornado Warning | MPX | Polk, Saint Croix | 29 min |
| Aug 19, 4:04 PM CDT | Tornado Warning | MPX | Dunn, Saint Croix | 26 min |
| Aug 19, 4:14 PM CDT | Tornado Warning | MPX | Barron, Polk | 46 min |
| Aug 19, 4:21 PM CDT | Tornado Warning | MPX | Polk | 39 min |
| Aug 19, 4:33 PM CDT | Tornado Warning | MPX | Saint Croix | 27 min |
| Aug 19, 4:43 PM CDT | Tornado Warning | MPX | Dunn, Pierce, Saint Croix | 47 min |
| Aug 19, 5:13 PM CDT | Tornado Warning | MPX | Barron, Dunn, Polk, Saint Croix | 47 min |
Nearby
Tornado Warnings in Wisconsin, 2009Every tornado warning in 2009Tornadoes in 2009
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.