Alert archive / Minnesota / Tornado Warnings in 2013

Tornado Warning 20, NWS La Crosse, WI

May 31, 2013Olmsted County, Minnesota

NWS La Crosse, WI issued this tornado warning at May 31, 2013, 9:41 PM CDT for Olmsted County, Minnesota. It was in force for 34 min. 6 reports 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: May 31, 2013, 9:41 PM CDT (02:41 UTC)
Expired: May 31, 2013, 10:15 PM CDT
In force: 34 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Olmsted County, MN

The radar

The La Crosse radar (KARX), 83 km from the middle of the area, began a volume at 02:42 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
May 31, 9:43 PM CDT	HAIL 0.25	2 Sw Eyota, MN
May 31, 9:45 PM CDT	HAIL 1	2 Sw Eyota, MN
May 31, 9:46 PM CDT	HAIL 0.25	Predmore, MN
May 31, 9:47 PM CDT	HAIL 1	1 Sw Eyota, MN
May 31, 9:50 PM CDT	HAIL 0.25	1 W Eyota, MN
May 31, 10:17 PM CDT	HAIL 0.25	3 Ne Dover, MN

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
May 31, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 2.7 hours before the alert went out and 146 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2032 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

605 
WFUS53 KARX 010241
TORARX
MNC109-010315-
/O.NEW.KARX.TO.W.0020.130601T0241Z-130601T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
941 PM CDT FRI MAY 31 2013

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL OLMSTED COUNTY IN SOUTHEAST MINNESOTA...

* UNTIL 1015 PM CDT

* AT 938 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 6 MILES SOUTHWEST OF EYOTA...AND MOVING
  NORTHEAST AT 30 MPH.

  HAZARD...DEVELOPING TORNADO AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
           SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
           OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
           EXTENSIVE TREE DAMAGE IS LIKELY.

* THIS DANGEROUS STORM WILL BE NEAR...
  EYOTA AROUND 950 PM CDT.
  DOVER AROUND 955 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4411 9213 4410 9208 4390 9209 4387 9234
      4397 9239
TIME...MOT...LOC 0241Z 240DEG 27KT 4394 9229

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

HALBACH

2 follow-up statements

381 
WWUS53 KARX 010250
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
950 PM CDT FRI MAY 31 2013

MNC109-010315-
/O.CON.KARX.TO.W.0020.000000T0000Z-130601T0315Z/
OLMSTED MN-
950 PM CDT FRI MAY 31 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR EAST CENTRAL OLMSTED
COUNTY UNTIL 1015 PM CDT...

AT 946 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR EYOTA...AND MOVING NORTHEAST AT 30 MPH.

HAZARD...DEVELOPING TORNADO AND QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION. QUARTER SIZED HAIL WAS            
         REPORTED NEAR EYOTA.

IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
         SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
         OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
         EXTENSIVE TREE DAMAGE IS LIKELY.

THIS DANGEROUS STORM WILL BE NEAR...
  DOVER AROUND 955 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORNADOES ARE DIFFICULT TO SEE AND CONFIRM AT NIGHT. TAKE COVER NOW.

&&

LAT...LON 4402 9231 4410 9215 4411 9211 4410 9209
      4409 9208 4390 9209 4391 9230 4400 9233
TIME...MOT...LOC 0250Z 240DEG 27KT 4398 9219

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

HALBACH

750 
WWUS53 KARX 010305
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1005 PM CDT FRI MAY 31 2013

MNC109-010315-
/O.CAN.KARX.TO.W.0020.000000T0000Z-130601T0315Z/
OLMSTED MN-
1005 PM CDT FRI MAY 31 2013

...THE TORNADO WARNING FOR EAST CENTRAL OLMSTED COUNTY IS
CANCELLED...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN
EFFECT FOR THE AREA.

LAT...LON 4402 9231 4410 9215 4411 9211 4410 9209
      4409 9208 4390 9209 4391 9230 4400 9233
TIME...MOT...LOC 0305Z 240DEG 27KT 4404 9205

$$

HALBACH

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 8:43 PM CDT	Severe Thunderstorm Warning	ARX	Mower, Olmsted	62 min
May 31, 9:03 PM CDT	Severe Thunderstorm Warning	ARX	Mower	42 min
May 31, 9:16 PM CDT	Areal Flood Advisory	ARX	Mower, Olmsted	3 hr
May 31, 9:24 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha, Winona	66 min
May 31, 9:50 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Mower, Olmsted	55 min
May 31, 10:25 PM CDT	Severe Thunderstorm Warning	ARX	Winona	50 min
May 31, 10:48 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Mower	42 min
May 31, 11:03 PM CDT	Areal Flood Advisory	ARX	Fillmore, Mower	5 hr
Jun 1, 4:18 AM CDT	River Flood Warning	ARX	Olmsted, Winona	20 hr

Nearby

Tornado Warnings in Minnesota, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.