Alert archive / Wisconsin / Tornado Warnings in 2009
Tornado Warning 44, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 19, 2009, 4:04 PM CDT for Dunn County, Saint Croix County, Wisconsin. It was in force for 26 min. 2 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 19, 2009, 4:04 PM CDT (21:04 UTC)
- Expired
- Aug 19, 2009, 4:30 PM CDT
- In force
- 26 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Dunn County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 110 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, 4:11 PM CDT | TORNADO | Forest, WI | TORNADO ON GROUND AT HWY 64 AT HWY 63 INTERSECTION. |
| Aug 19, 4:15 PM CDT | TORNADO | 2 N Forest, WI | TORNADO STILL ON GROUND AT INTERSECTION OF 270TH STR. AND 20TH AVE. |
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 113 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 192104 TORMPX WIC033-109-192130- /O.NEW.KMPX.TO.W.0044.090819T2104Z-090819T2130Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 404 PM CDT WED AUG 19 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... NORTHEASTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN... NORTHWESTERN DUNN COUNTY IN WEST CENTRAL WISCONSIN... * UNTIL 430 PM CDT * AT 404 PM CDT...LAW ENFORCEMENT REPORTED A TORNADO 1 MILE WEST OF EMERALD. RADAR SHOWED THE TORNADIC STORM MOVING NORTH AT 30 MPH. * LOCATIONS IN THE WARNING INCLUDE... GLENWOOD CITY... EMERALD... CYLON... FOREST... CONNORSVILLE... DOWNING... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 4521 9231 4521 9199 4500 9212 4505 9238 TIME...MOT...LOC 2104Z 201DEG 27KT 4506 9223 $$
1 follow-up statement
000 WWUS53 KMPX 192113 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 413 PM CDT WED AUG 19 2009 WIC033-109-192130- /O.CON.KMPX.TO.W.0044.000000T0000Z-090819T2130Z/ ST. CROIX WI-DUNN WI- 413 PM CDT WED AUG 19 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR NORTHWESTERN DUNN AND NORTHEASTERN ST. CROIX COUNTIES... AT 410 PM CDT...A TORNADO WAS REPORTED BY LAW ENFORCEMENT NEAR FOREST. AT 413 PM CDT...RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS LOCATED 3 MILES EAST OF FOREST...AND MOVING NORTH AT 30 MPH. LOCATIONS IN THE WARNING INCLUDE... CONNORSVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 4521 9231 4521 9199 4500 9212 4505 9238 TIME...MOT...LOC 2113Z 201DEG 27KT 4512 9220 $$
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, 4:06 PM CDT | Tornado Warning | MPX | Pierce, Saint Croix | 39 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.