Alert archive / Wisconsin / Tornado Warnings in 2009
Tornado Warning 34, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 8, 2009, 10:29 PM CDT for Saint Croix County, Wisconsin. It was in force for 46 min. 4 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
- Aug 8, 2009, 10:29 PM CDT (03:29 UTC)
- Expired
- Aug 8, 2009, 11:15 PM CDT
- In force
- 46 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
County Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 90 km from the middle of the area, began a volume at 03:30 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 8, 10:40 PM CDT | TSTM WND DMG | 2 N Burkhardt, WI | NUMEROUS POWER LINES AND TREES TOPPLED IN ST JOSEPH TOWNSHIP NEAR OAKWOOD LANE. HOME OWNER AT 1223 OAKWOOD LANE REPORTED GARAGE RIPPED APART AND BOAT SUCKED AWAY. |
| Aug 8, 10:45 PM CDT | TSTM WND DMG | 2 Nnw Hammond, WI | GARAGE DOORS BLOWN IN. PORTION OF A ROOF BLOWN OFF HOUSE. CORN BLOWN DOWN. DAMAGE IN THE AREA OF 167TH STREET. TIME ESTIMATED FROM RADAR. |
| Aug 8, 10:51 PM CDT | TORNADO | 4 Nnw Hammond, WI | DAMAGE SURVEY DETERMINED EF-0 TORNADO FOR ABOUT 1/2 MILE. SEVERAL GARAGE DOORS WERE BLOWN IN. PORTION OF A ROOF BLOWN OFF HOUSE. NUMEROUS SOFFETS BLOWN OFF. CORN BLOWN DOWN. DAMAGE IN THE AREA OF 167TH STREET. TIME ESTIMATED FROM RADAR. |
| Aug 8, 11:11 PM CDT | TSTM WND DMG | Boardman, WI | DAMAGE SURVEY PLANNED AROUND BOARDMAN AND BURKHARDT. |
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 |
|---|---|---|---|
| Aug 8, 3:46 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 3.5 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
- 3715 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 3.8
- Supercell composite
- 16.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KMPX 090329 TORMPX WIC109-090415- /O.NEW.KMPX.TO.W.0034.090809T0329Z-090809T0415Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1029 PM CDT SAT AUG 8 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... WEST CENTRAL TO EAST CENTRAL ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN... * UNTIL 1115 PM CDT * AT 1026 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS NEAR BURKHARDT...AND MOVING EAST AT 20 MPH. * LOCATIONS IN THE WARNING INCLUDE... HOULTON... ROBERTS... HAMMOND... CYLON... BOARDMAN... AREAS SOUTH OF NEW RICHMOND... 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. && LAT...LON 4513 9230 4496 9229 4498 9268 4508 9270 TIME...MOT...LOC 0328Z 272DEG 17KT 4504 9263 $$
2 follow-up statements
000 WWUS53 KMPX 090340 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1040 PM CDT SAT AUG 8 2009 WIC109-090415- /O.CON.KMPX.TO.W.0034.000000T0000Z-090809T0415Z/ ST. CROIX WI- 1040 PM CDT SAT AUG 8 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR CENTRAL AND EAST CENTRAL ST. CROIX COUNTY... AT 1037 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED NEAR HOULTON...AND MOVING EAST AT 20 MPH. THE TORNADO IS LIKELY WRAPPED IN RAIN. LOCATIONS IN THE WARNING INCLUDE... HOULTON...ROBERTS...HAMMOND AND CYLON. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OR PRODUCING TORNADOES AND LARGE DAMAGING HAIL. && LAT...LON 4498 9261 4509 9262 4513 9230 4496 9229 TIME...MOT...LOC 0338Z 272DEG 17KT 4504 9257 $$
000 WWUS53 KMPX 090351 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1051 PM CDT SAT AUG 8 2009 WIC109-090415- /O.CON.KMPX.TO.W.0034.000000T0000Z-090809T0415Z/ ST. CROIX WI- 1051 PM CDT SAT AUG 8 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR CENTRAL AND EAST CENTRAL ST. CROIX COUNTY... AT 1049 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 4 MILES NORTH OF HAMMOND...AND MOVING EAST AT 25 MPH. LOCATIONS IN THE WARNING INCLUDE... HAMMOND AND CYLON. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OR PRODUCING TORNADOES AND LARGE DAMAGING HAIL. && LAT...LON 4498 9252 4510 9249 4513 9230 4496 9229 TIME...MOT...LOC 0350Z 276DEG 21KT 4503 9246 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 9:43 PM CDT | Tornado Warning | MPX | Polk, Saint Croix | 32 min |
| Aug 8, 10:01 PM CDT | Tornado Warning | MPX | Saint Croix | 29 min |
| Aug 8, 10:14 PM CDT | Tornado Warning | MPX | Polk, Saint Croix | 31 min |
| Aug 8, 11:14 PM CDT | Tornado Warning | MPX | Dunn, Saint Croix | 46 min |
| Aug 9, 12:00 AM CDT | Tornado Warning | MPX | Dunn | 30 min |
| Aug 9, 12:36 AM CDT | Special Weather Statement | MPX | Chippewa, Eau Claire | 54 min |
| Aug 9, 1:27 AM CDT | Special Weather Statement | MPX | Chippewa | 33 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.