Alert archive / Minnesota / Tornado Warnings in 2012

Tornado Warning 8, NWS Duluth, MN

July 4, 2012Cass County, Crow Wing County, Minnesota

NWS Duluth, MN issued this tornado warning at Jul 4, 2012, 10:28 PM CDT for Cass County, Crow Wing County, Minnesota. It was in force for 23 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: Jul 4, 2012, 10:28 PM CDT (03:28 UTC)
Expired: Jul 4, 2012, 10:51 PM CDT
In force: 23 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon

Counties Cass County, MN, Crow Wing County, MN

The radar

The Minneapolis radar (KMPX), 164 km from the middle of the area, began a volume at 03:31 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
Jul 4, 7:31 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 4, 8:59 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.5 hours before the alert went out and 163 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: 2542 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1972 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

563 
WFUS53 KDLH 050328
TORDLH
MNC021-035-050400-
/O.NEW.KDLH.TO.W.0008.120705T0328Z-120705T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DULUTH MN
1028 PM CDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN DULUTH MN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN CROW WING COUNTY IN EAST CENTRAL MINNESOTA...
  SOUTH CENTRAL CASS COUNTY IN NORTH CENTRAL MINNESOTA...

* UNTIL 1100 PM CDT

* AT 1025 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR LENNOX...OR
  10 MILES WEST OF BRAINERD...MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO FORT
  RIPLEY...BARROWS...ST. MATHIAS...SOUTH LONG LAKE AND SHEPHARD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 1.5 
INCH HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 4626 9436 4628 9435 4630 9437 4631 9437
      4631 9404 4615 9404 4615 9428 4615 9436
      4616 9438 4624 9440
TIME...MOT...LOC 0328Z 286DEG 23KT 4629 9437

$$

SENGENBERGER

1 follow-up statement

470 
WWUS53 KDLH 050351
SVSDLH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DULUTH MN
1051 PM CDT WED JUL 4 2012

MNC021-035-050401-
/O.CAN.KDLH.TO.W.0008.000000T0000Z-120705T0400Z/
CROW WING MN-CASS MN-
1051 PM CDT WED JUL 4 2012

...THE TORNADO WARNING FOR CASS AND SOUTHWESTERN CROW WING COUNTIES
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 0300 AM CDT.

LAT...LON 4626 9436 4628 9435 4630 9437 4631 9437
      4631 9404 4615 9404 4615 9428 4615 9436
      4616 9438 4624 9440
TIME...MOT...LOC 0351Z 286DEG 23KT 4624 9417

$$

SENGENBERGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 7:15 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Cass, Crow Wing, Itasca, Pine and 1 more	45 min
Jul 4, 7:53 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Crow Wing, Pine	52 min
Jul 4, 8:43 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton, Pine	47 min
Jul 4, 9:02 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	43 min
Jul 4, 9:09 PM CDT	Special Weather Statement	DLH	Cook	21 min
Jul 4, 9:23 PM CDT	Tornado Warning	DLH	Cass	52 min
Jul 4, 9:32 PM CDT	Special Weather Statement	DLH	Aitkin	43 min
Jul 4, 9:35 PM CDT	Special Weather Statement	DLH	Pine	40 min
Jul 4, 9:53 PM CDT	Special Weather Statement	DLH	Koochiching	52 min
Jul 4, 9:53 PM CDT	Tornado Warning	DLH	Cass, Crow Wing	22 min
Jul 4, 9:54 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Crow Wing	51 min
Jul 4, 10:09 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Crow Wing	36 min
Jul 4, 10:14 PM CDT	Tornado Warning	DLH	Cass, Crow Wing	34 min
Jul 4, 10:37 PM CDT	Areal Flood Advisory	DLH	Aitkin, Carlton, Cass, Crow Wing, Pine	5 hr
Jul 4, 10:45 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Carlton	45 min
Jul 4, 11:47 PM CDT	Special Weather Statement	DLH	Pine	58 min
Jul 5, 12:24 AM CDT	Special Weather Statement	DLH	Cook	36 min

Nearby

Tornado Warnings in Minnesota, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.