Alert archive / Minnesota / Tornado Warnings in 2010

Tornado Warning 25, NWS Twin Cities, MN

June 17, 2010Steele County, Waseca County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Jun 17, 2010, 7:10 PM CDT for Steele County, Waseca County, Minnesota. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 17, 2010, 7:10 PM CDT (00:10 UTC)
Expired: Jun 17, 2010, 8:00 PM CDT
In force: 50 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

Counties Steele County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 96 km from the middle of the area, began a volume at 00:10 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.

What was reported inside it

Time	Report	Where	Remark
Jun 17, 8:00 PM CDT	TSTM WND DMG	Nw New Richland, MN	TWO 3 TO 4 FT DIAMETER TREES SNAPPED AT BASED AND BRANCHES DOWN. TIME ESTIMATED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 17, 1:54 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.2 hours before the alert went out and 362 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: 1494 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1231 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.5

Open this sounding in Storm Lab

The text

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

396 
WFUS53 KMPX 180010
TORMPX
MNC147-161-180100-
/O.NEW.KMPX.TO.W.0025.100618T0010Z-100618T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
710 PM CDT THU JUN 17 2010

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 800 PM CDT

* AT 705 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG
  ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS 2 MILES
  SOUTHWEST OF WALDORF...OR ABOUT 7 MILES NORTHEAST OF MINNESOTA
  LAKE...AND MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  WASECA...
  OTISCO...
  NEW RICHLAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON 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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT THURSDAY EVENING
FOR SOUTHERN MINNESOTA. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL
100 AM CDT FRIDAY MORNING FOR NORTHWESTERN WISCONSIN.

&&

LAT...LON 4401 9377 4418 9332 4402 9320 4386 9349
      4385 9377
TIME...MOT...LOC 0010Z 244DEG 27KT 4393 9369

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:00 PM CDT	Severe Thunderstorm Warning	MPX	Anoka, Hennepin, Ramsey	35 min
Jun 17, 7:12 PM CDT	Special Weather Statement	MPX	Chisago, Washington	2 hr
Jun 17, 7:13 PM CDT	Tornado Warning	MPX	Blue Earth, Steele, Waseca	47 min
Jun 17, 7:28 PM CDT	Tornado Warning	MPX	Freeborn, Steele	47 min
Jun 17, 7:52 PM CDT	Tornado Warning	MPX	Steele	23 min
Jun 17, 7:55 PM CDT	Flash Flood Warning	MPX	Freeborn, Steele, Waseca	6 hr
Jun 17, 8:00 PM CDT	Areal Flood Advisory	MPX	Blue Earth, Faribault, Le Sueur, Nicollet, Rice	6 hr
Jun 17, 8:02 PM CDT	Severe Thunderstorm Warning	MPX	Chisago, Isanti	43 min
Jun 17, 8:11 PM CDT	Tornado Warning	MPX	Steele	34 min
Jun 17, 8:13 PM CDT	Tornado Warning	MPX	Freeborn	32 min
Jun 17, 8:34 PM CDT	Tornado Warning	MPX	Chisago	26 min

Nearby

Tornado Warnings in Minnesota, 2010 Every tornado warning in 2010 Tornadoes in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.