Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 266, NWS Twin Cities, MN

October 29, 2004Dunn County, Wisconsin

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 29, 2004, 7:26 PM CDT for Dunn County, Wisconsin. It was in force for 34 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: Oct 29, 2004, 7:26 PM CDT (00:26 UTC)
Expired: Oct 29, 2004, 8:00 PM CDT
In force: 34 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Dunn County, WI

The radar

The Minneapolis radar (KMPX), 129 km from the middle of the area, began a volume at 00:29 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
Oct 29, 6:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.4 hours before the alert went out and 131 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 174 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 300026
SVRMPX
WIC033-300100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
724 PM CDT FRI OCT 29 2004

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DUNN COUNTY IN WEST CENTRAL WISCONSIN

* UNTIL 800 PM CDT

* AT 723 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...   
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THE       
  LEADING EDGE OF THIS STORM EXTENDED FROM 10 MILES WEST OF DOWNING  
  TO 15 MILES WEST OF MENOMONIE...MOVING EAST TO NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DOWNING.
  BOYCEVILLE.
  CONNORSVILLE.
  WHEELER.
  MENOMONIE.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

LAT...LON 4520 9215 4488 9211 4494 9171 4521 9170

$$
MBK

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 7:09 PM CDT	Severe Thunderstorm Warning	MPX	Polk	51 min
Oct 29, 7:33 PM CDT	Severe Thunderstorm Warning	MPX	Barron	42 min
Oct 29, 8:29 PM CDT	Severe Thunderstorm Warning	MPX	Eau Claire	46 min
Oct 30, 2:28 AM CDT	Severe Thunderstorm Warning	MPX	Saint Croix	32 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2004 Every severe thunderstorm warning 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.