Alert archive / Minnesota / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 261, NWS Twin Cities, MN

October 29, 2004Steele County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Oct 29, 2004, 6:10 PM CDT for Steele County, Minnesota. It was in force for 20 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, 6:10 PM CDT (23:10 UTC)
Expired: Oct 29, 2004, 6:30 PM CDT
In force: 20 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Steele County, MN

The radar

The Minneapolis radar (KMPX), 100 km from the middle of the area, began a volume at 23:09 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, 3:35 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 101 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: 1021 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 508 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KMPX 292310
SVRMPX
MNC147-292330-

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 630 PM CDT

* AT 604 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING WINDS. THIS STORM WAS
  LOCATED NEAR STEELE CENTER...OR ABOUT 9 MILES SOUTHEAST OF
  OWATONNA...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MERTON.
  STEELE CENTER.
  OWATONNA.
  PRATT.
  HAVANA.
  RICE LAKE.

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 4386 9337 4389 9307 4414 9308 4418 9317

$$
MBK

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 5:21 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott	24 min
Oct 29, 5:40 PM CDT	Severe Thunderstorm Warning	MPX	Hennepin	35 min
Oct 29, 5:44 PM CDT	Severe Thunderstorm Warning	MPX	Scott	26 min
Oct 29, 5:53 PM CDT	Tornado Warning	MPX	Benton, Morrison	52 min
Oct 29, 5:57 PM CDT	Severe Thunderstorm Warning	MPX	Anoka	33 min
Oct 29, 5:59 PM CDT	Severe Thunderstorm Warning	MPX	Isanti	61 min
Oct 29, 6:03 PM CDT	Tornado Warning	MPX	Isanti	27 min
Oct 29, 6:31 PM CDT	Tornado Warning	MPX	Isanti	29 min
Oct 29, 6:33 PM CDT	Severe Thunderstorm Warning	MPX	Goodhue	42 min
Oct 29, 6:38 PM CDT	Tornado Warning	MPX	Kanabec	22 min
Oct 29, 6:48 PM CDT	Tornado Warning	MPX	Chisago	42 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.