Alert archive / Minnesota / Tornado Warnings in 2004

Tornado Warning 48, NWS Twin Cities, MN

October 29, 2004Isanti County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Oct 29, 2004, 6:03 PM CDT for Isanti 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: Oct 29, 2004, 6:03 PM CDT (23:03 UTC)
Expired: Oct 29, 2004, 6:30 PM CDT
In force: 27 min
Issued by: NWS Twin Cities, MN
Area: Counties, with a storm outline in the text

County Isanti County, MN

The radar

The Minneapolis radar (KMPX), 83 km from the middle of the area, began a volume at 23:04 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, 11.1 hours before the alert went out and 83 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 
WFUS53 KMPX 292303
TORMPX
MNC059-292330-

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

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  ISANTI COUNTY IN EAST CENTRAL MINNESOTA

* UNTIL 630 PM CDT

* AT 559 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO...13 MILES SOUTHWEST OF CAMBRIDGE...OR ABOUT 9 MILES
  SOUTHEAST OF PRINCETON...MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CAMBRIDGE.
  ISANTI.
  CROWN.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

LAT...LON 4564 9351 4542 9351 4546 9321 4574 9318

$$
TDK

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, 6:10 PM CDT	Severe Thunderstorm Warning	MPX	Steele	20 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

Tornado Warnings in Minnesota, 2004 Every tornado warning in 2004 Tornadoes 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.