Alert archive / Minnesota / Tornado Warnings in 2004

Tornado Warning 40, NWS Twin Cities, MN

September 5, 2004Steele County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Sep 5, 2004, 4:33 PM CDT for Steele County, Minnesota. It was in force for 27 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, 4:33 PM CDT (21:33 UTC)
Expired
Sep 5, 2004, 5:00 PM CDT
In force
27 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), 101 km from the middle of the area, began a volume at 21:35 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.

IssuedProductOfficeLasted
Sep 5, 3:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 9.6 hours before the alert went out and 102 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 12:00Z on 2004-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 246 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 12:00Z on 2004-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 282 square meters per square second.19395878Sfc1 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
246 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
698 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
282 m²/s²
0-3 km storm-relative helicity
329 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

939 
WFUS53 KMPX 052133
TORMPX
MNC147-052200-

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  STEELE COUNTY IN SOUTH CENTRAL MINNESOTA

* UNTIL 500 PM CDT

* AT 431 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO...6 MILES SOUTHEAST OF ELLENDALE...OR ABOUT 14 MILES
  NORTHEAST OF ALBERT LEA...MOVING NORTH AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ELLENDALE.
  BIXBY.
  MERTON.
  MOLAND.
  STEELE CENTER.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT SUNDAY EVENING FOR
SOUTHERN MINNESOTA.

LAT...LON 4385 9335 4385 9308 4419 9288 4419 9316

$$

RAH/SEB

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 3:39 PM CDTTornado WarningMPXWaseca36 min
Sep 5, 4:19 PM CDTTornado WarningMPXFreeborn26 min
Sep 5, 4:22 PM CDTTornado WarningMPXKandiyohi38 min
Sep 5, 4:25 PM CDTTornado WarningMPXRice35 min
Sep 5, 5:51 PM CDTTornado WarningMPXGoodhue39 min
Sep 5, 5:56 PM CDTTornado WarningMPXWaseca34 min

Nearby

Tornado Warnings in Minnesota, 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.