Alert archive / Wisconsin / Tornado Warnings in 2004

Tornado Warning 44, NWS Twin Cities, MN

September 5, 2004Polk County, Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Sep 5, 2004, 7:16 PM CDT for Polk County, Saint Croix County, Wisconsin. It was in force for 29 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
Sep 5, 2004, 7:16 PM CDT (00:16 UTC)
Expired
Sep 5, 2004, 7:45 PM CDT
In force
29 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Polk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 102 km from the middle of the area, began a volume at 00:16 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.3 hours before the alert went out and 105 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2004-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 93 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2004-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 417 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
93 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
417 m²/s²
0-3 km storm-relative helicity
457 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

860 
WFUS53 KMPX 060016
TORMPX
WIC095-109-060045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
714 PM CDT SUN SEP 5 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  POLK COUNTY IN NORTHWEST WISCONSIN
  ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 745 PM CDT

* AT 711 PM CDT...LAW ENFORCEMENT REPORTED A ROTATING WALL CLOUD 6   
  MILES EAST OF NEW RICHMOND...MOVING NORTH AT 40 MPH. RADAR         
  CONFIRMS VERY STRONG ROTATION WITH THIS STORM. A SECOND AREA OF    
  STRONG ROTATION WILL MOVE FROM THE WOODVILLE AREA NORTHEAST TOWARD 
  EMERALD.

* LOCATIONS IMPACTED INCLUDE...
  AMERY.
  WOODVILLE.
  HERSEY.
  EMERALD.
  FOREST.
  DEER PARK.
  LITTLE FALLS.
  CLEAR LAKE.
  

LAT...LON 4504 9259 4487 9219 4523 9217 4544 9217
      4547 9242

$$

RAH/SEB

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 5, 7:33 PM CDTTornado WarningMPXDunn27 min
Sep 5, 7:53 PM CDTTornado WarningMPXBarron22 min

Nearby

Tornado Warnings in Wisconsin, 2004Every tornado warning in 2004Tornadoes in 2004

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.