Alert archive / Wisconsin / Tornado Warnings in 2009
Tornado Warning 32, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 8, 2009, 10:01 PM CDT for Saint Croix County, Wisconsin; Washington County, Minnesota. It was in force for 29 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, 10:01 PM CDT (03:01 UTC)
- Expired
- Aug 8, 2009, 10:30 PM CDT
- In force
- 29 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Washington County, MN, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 71 km from the middle of the area, began a volume at 03:02 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, 10:20 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, 10:25 PM CDT | TSTM WND DMG | 1 N Burkhardt, WI | MAJOR DAMAGE TO 4 HOMES. LOTS OF TREES DOWN. TIME OF EVENT ESTIMATED. DAMAGE SURVEY PLANNED AROUND BOARDMAN AND BURKHARDT. |
| Aug 8, 10:25 PM CDT | TORNADO | 1 Nnw Burkhardt, WI | DAMAGE SURVEY DETERMINED AN EF-1 TORNADO TOUCHED DOWN AND TRAVELLED FIVE MILES TO TWO MILES SOUTHEAST OF BOARDMAN. NUMEROUS TREES WERE SNAPPED. SEVERAL GARAGES AND A BOAT WERE BLOWN AWAY. TORNADO WAS ACCOMPANIED BY VERY STRONG SOUTHERLY INFLOW WINDS THAT ALSO |
| 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. |
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, 3.0 hours before the alert went out and 74 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 090301 TORMPX MNC163-WIC109-090330- /O.NEW.KMPX.TO.W.0032.090809T0301Z-090809T0330Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1001 PM CDT SAT AUG 8 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA... WEST CENTRAL ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN... * UNTIL 1030 PM CDT * AT 1000 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS FIVE MILES WEST OF STILLWATER...AND MOVING EAST AT 20 MPH...TOWARD STILLWATER. * LOCATIONS IN THE WARNING INCLUDE... STILLWATER... BAYPORT... BURKHARDT... OAK PARK HEIGHTS... NORTH HUDSON... 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 MIDNIGHT CDT SUNDAY MORNING FOR EAST CENTRAL MINNESOTA AND NORTHWESTERN WISCONSIN. && LAT...LON 4506 9257 4497 9256 4501 9289 4508 9290 TIME...MOT...LOC 0301Z 272DEG 18KT 4505 9285 $$
1 follow-up statement
000 WWUS53 KMPX 090320 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1020 PM CDT SAT AUG 8 2009 MNC163-090328- /O.CAN.KMPX.TO.W.0032.000000T0000Z-090809T0330Z/ WASHINGTON MN- 1020 PM CDT SAT AUG 8 2009 ...THE TORNADO WARNING FOR CENTRAL WASHINGTON COUNTY IS CANCELLED... RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED OR MOVED OUT OF THE WARNED AREA. THEREFORE...THE TORNADO WARNING HAS BEEN CANCELLED FOR THE STILLWATER AND BAYPORT AREAS. THE OTHER TORNADO WARNING CONTINUES FOR NORTHEASTERN WASHINGTON COUNTY AND MARINE ON ST CROIX. LAT...LON 4500 9276 4507 9277 4506 9257 4497 9256 TIME...MOT...LOC 0318Z 272DEG 18KT 4504 9271 $$ WIC109-090330- /O.CON.KMPX.TO.W.0032.000000T0000Z-090809T0330Z/ ST. CROIX WI- 1020 PM CDT SAT AUG 8 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR WEST CENTRAL ST. CROIX COUNTY... AT 1017 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 3 MILES WEST OF BURKHARDT...AND MOVING EAST AT 20 MPH. A FUNNEL CLOUD WAS SPOTTED AT 1010 PM WITH THIS STORM. LOCATIONS IN THE WARNING INCLUDE... BURKHARDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OR PRODUCING TORNADOES AND LARGE DAMAGING HAIL. && LAT...LON 4500 9276 4507 9277 4506 9257 4497 9256 TIME...MOT...LOC 0318Z 272DEG 18KT 4504 9271 $$
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, 10:14 PM CDT | Tornado Warning | MPX | Polk, Saint Croix | 31 min |
| Aug 8, 10:29 PM CDT | Tornado Warning | MPX | Saint Croix | 46 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 |
| Aug 8, 8:31 PM CDT | Tornado Warning | MPX | Hennepin | 29 min |
| Aug 8, 8:49 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Ramsey | 26 min |
| Aug 8, 9:13 PM CDT | Tornado Warning | MPX | Anoka, Ramsey, Washington | 32 min |
Nearby
Tornado Warnings in Wisconsin, 2009Tornado Warnings in Minnesota, 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.