Alert archive / Wisconsin / Tornado Warnings in 2009
Tornado Warning 36, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 9, 2009, 12:00 AM CDT for Dunn County, Wisconsin. It was in force for 30 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
- Aug 9, 2009, 12:00 AM CDT (05:00 UTC)
- Expired
- Aug 9, 2009, 12:30 AM CDT
- In force
- 30 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
County Dunn County, WI
The radar
The La Crosse radar (KARX), 136 km from the middle of the area, began a volume at 05:04 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 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, 5.0 hours before the alert went out and 142 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 090500 TORMPX WIC033-090545- /O.NEW.KMPX.TO.W.0036.090809T0500Z-090809T0545Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1200 AM CDT SUN AUG 9 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... CENTRAL DUNN COUNTY IN WEST CENTRAL WISCONSIN... * UNTIL 1245 AM CDT * AT 1159 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS 5 MILES NORTHWEST OF MENOMONIE...OR ABOUT 5 MILES EAST OF KNAPP...AND MOVING EAST AT 20 MPH. * LOCATIONS IN THE WARNING INCLUDE... MENOMONIE... TAINTER LAKE... COLFAX... ELK MOUND... 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 NORTHWESTERN WISCONSIN. && LAT...LON 4501 9166 4486 9166 4490 9204 4503 9201 TIME...MOT...LOC 0500Z 282DEG 17KT 4493 9198 $$
1 follow-up statement
000 WWUS53 KMPX 090530 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1230 AM CDT SUN AUG 9 2009 WIC033-090539- /O.CAN.KMPX.TO.W.0036.000000T0000Z-090809T0545Z/ DUNN WI- 1230 AM CDT SUN AUG 9 2009 ...THE TORNADO WARNING FOR CENTRAL DUNN COUNTY IS CANCELLED... RADAR INDICATED THAT THE SEVERE STORM HAD WEAKENED AND NO LONGER APPEARS TORNADIC. THEREFORE...THE TORNADO WARNING HAS BEEN CANCELLED. LAT...LON 4501 9166 4486 9166 4490 9204 4503 9201 TIME...MOT...LOC 0529Z 282DEG 17KT 4490 9179 $$
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, 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, 12:36 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.