Alert archive / Minnesota / Tornado Warnings in 2018

Tornado Warning 13, NWS La Crosse, WI

September 20, 2018Wabasha County, Minnesota

NWS La Crosse, WI issued this tornado warning at Sep 20, 2018, 7:13 PM CDT for Wabasha County, Minnesota. It was in force for 32 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 20, 2018, 7:13 PM CDT (00:13 UTC)
Expired: Sep 20, 2018, 7:45 PM CDT
In force: 32 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated

County Wabasha County, MN

The radar

The Minneapolis radar (KMPX), 109 km from the middle of the area, began a volume at 00:16 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
Sep 20, 6:23 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 0.2 hours before the alert went out and 338 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: 3 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 512 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 340 m²/s²
0-3 km storm-relative helicity: 454 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

306 
WFUS53 KARX 210013
TORARX
MNC157-210045-
/O.NEW.KARX.TO.W.0013.180921T0013Z-180921T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
713 PM CDT THU SEP 20 2018

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Northwestern Wabasha County in southeastern Minnesota...

* Until 745 PM CDT.
    
* At 713 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Mazeppa, or 15 miles south of Red Wing, moving
  east at 55 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic thunderstorm will remain over mainly rural areas of
  northwestern Wabasha County, including the following locations...
  Zumbro Falls, Oak Center, Bluff Valley Campground, Maple Springs
  and Gilbert Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4437 9255 4437 9243 4445 9243 4445 9224
      4444 9221 4442 9212 4441 9208 4421 9255
TIME...MOT...LOC 0013Z 253DEG 49KT 4433 9258 

TORNADO...RADAR INDICATED
HAIL...<.75

$$

Wetenkamp

2 follow-up statements

585 
WWUS53 KARX 210030
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
730 PM CDT THU SEP 20 2018

MNC157-210045-
/O.CON.KARX.TO.W.0013.000000T0000Z-180921T0045Z/
Wabasha MN-
730 PM CDT THU SEP 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN WABASHA COUNTY...
    
At 729 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Stockholm, or 11 miles west of Wabasha, moving east
at 55 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Oak Center, Maple Springs, Gilbert Valley, County Roads 31 And 2,
County Roads 33 And 4 and Highway 63 And County 2.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

If on or near Lake Pepin, get away from the water and move to safe 
shelter immediately. 

&&

LAT...LON 4436 9241 4439 9243 4445 9243 4445 9224
      4444 9221 4442 9212 4441 9208 4428 9239
TIME...MOT...LOC 0029Z 253DEG 49KT 4440 9228 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Wetenkamp

808 
WWUS53 KARX 210043
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
743 PM CDT THU SEP 20 2018

MNC157-210053-
/O.EXP.KARX.TO.W.0013.000000T0000Z-180921T0045Z/
Wabasha MN-
743 PM CDT THU SEP 20 2018

...THE TORNADO WARNING FOR NORTHWESTERN WABASHA COUNTY WILL EXPIRE AT
745 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.  However gusty winds
are still possible with this thunderstorm.

A Tornado Watch remains in effect until midnight CDT for southeastern
Minnesota...and west central Wisconsin.

LAT...LON 4436 9241 4439 9243 4445 9243 4445 9224
      4444 9221 4442 9212 4441 9208 4428 9239
TIME...MOT...LOC 0042Z 253DEG 49KT 4445 9206 

$$

Wetenkamp

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 7:04 PM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha, Winona	56 min
Sep 20, 7:50 PM CDT	Special Weather Statement	ARX	Fillmore, Houston, Winona	85 min
Sep 20, 8:33 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore	42 min
Sep 20, 9:12 PM CDT	Special Weather Statement	ARX	Houston	93 min

Nearby

Tornado Warnings in Minnesota, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.