Alert archive / Minnesota / Tornado Warnings in 2018

Tornado Warning 12, NWS La Crosse, WI

September 20, 2018Dodge County, Minnesota

NWS La Crosse, WI issued this tornado warning at Sep 20, 2018, 6:46 PM CDT for Dodge County, Minnesota. It was in force for 29 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: Sep 20, 2018, 6:46 PM CDT (23:46 UTC)
Expired: Sep 20, 2018, 7:15 PM CDT
In force: 29 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Dodge County, MN

The radar

The Minneapolis radar (KMPX), 95 km from the middle of the area, began a volume at 23:49 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
Sep 20, 6:57 PM CDT	TSTM WND GST 48	5 W West Concord, MN	REPORTED BY WEST CONCORD FIRE DEPT
Sep 20, 6:57 PM CDT	TSTM WND GST 48	5 W West Concord, MN	REPORTED BY WEST CONCORD FIRE DEPT.
Sep 20, 6:58 PM CDT	TSTM WND DMG	2 W West Concord, MN	TREES BLOWN DOWN
Sep 20, 6:58 PM CDT	TSTM WND DMG	2 W West Concord, MN	TREES BLOWN DOWN.
Sep 20, 6:59 PM CDT	TSTM WND GST 60	3 Nnw West Concord, MN	REPORTED BY WEST CONCORD FIRE DEPT
Sep 20, 6:59 PM CDT	TSTM WND GST 60	3 Nnw West Concord, MN	REPORTED BY WEST CONCORD FIRE DEPT.

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
Sep 20, 6:23 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.8 hours before the alert went out and 97 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: 18 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

944 
WFUS53 KARX 202346
TORARX
MNC039-210015-
/O.NEW.KARX.TO.W.0012.180920T2346Z-180921T0015Z/

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

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Northern Dodge County in southeastern Minnesota...

* Until 715 PM CDT.
    
* At 645 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Owatonna, moving east at 60 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 dangerous storm will be near...
  Claremont around 655 PM CDT.
  West Concord around 700 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Wasioja, Concord, Eden, County Roads 1 And 24 and County Roads 20 And
5.

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 4420 9304 4419 9268 4410 9268 4402 9304
TIME...MOT...LOC 2345Z 253DEG 52KT 4409 9317 

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

$$

Wetenkamp

1 follow-up statement

419 
WWUS53 KARX 202359
SVSARX

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

MNC039-210015-
/O.CON.KARX.TO.W.0012.000000T0000Z-180921T0015Z/
Dodge MN-
659 PM CDT THU SEP 20 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHERN
DODGE COUNTY...
    
At 659 PM CDT, a severe thunderstorm capable of producing a tornado
was located over West Concord, or 8 miles northwest of Mantorville,
moving east at 60 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
northern Dodge County, including the following locations... Wasioja,
Concord, Eden, County Roads 1 And 24 and County Roads 20 And 5.

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 4420 9304 4419 9268 4410 9268 4402 9304
TIME...MOT...LOC 2359Z 259DEG 50KT 4416 9284 

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

$$

Rieck

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 10:35 AM CDT	Special Weather Statement	ARX	Houston	40 min
Sep 20, 10:51 AM CDT	River Flood Warning	ARX	Mower	63 hr
Sep 20, 5:59 PM CDT	Special Weather Statement	ARX	Dodge, Mower, Olmsted	61 min
Sep 20, 6:38 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower, Olmsted	52 min
Sep 20, 6:56 PM CDT	Special Weather Statement	ARX	Dodge, Fillmore, Mower, Olmsted, Wabasha, Winona	94 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.