Alert archive / Minnesota / Tornado Warnings in 2017

Tornado Warning 38, NWS Twin Cities, MN

August 16, 2017Le Sueur County, Rice County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Aug 16, 2017, 6:31 PM CDT for Le Sueur County, Rice County, Minnesota. It was in force for 44 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: Aug 16, 2017, 6:31 PM CDT (23:31 UTC)
Expired: Aug 16, 2017, 7:15 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Le Sueur County, MN, Rice County, MN

The radar

The Minneapolis radar (KMPX), 51 km from the middle of the area, began a volume at 23:30 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.5 hours before the alert went out and 52 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: 81 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 215 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

247 
WFUS53 KMPX 162331
TORMPX
MNC079-131-170015-
/O.NEW.KMPX.TO.W.0038.170816T2331Z-170817T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
631 PM CDT WED AUG 16 2017

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Northeastern Le Sueur County in south central Minnesota...
  Northwestern Rice County in south central Minnesota...

* Until 715 PM CDT
    
* At 631 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Kilkenny, or 13 miles west of Faribault, moving
  northwest at 25 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...
  Montgomery around 650 PM CDT. 
  New Prague around 705 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Heidelberg and Kilkenny.

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.

&&

LAT...LON 4429 9341 4428 9362 4454 9379 4454 9348
TIME...MOT...LOC 2331Z 153DEG 21KT 4433 9354 

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

$$

BORGHOFF

3 follow-up statements

058 
WWUS53 KMPX 162343
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
643 PM CDT WED AUG 16 2017

MNC131-162353-
/O.CAN.KMPX.TO.W.0038.000000T0000Z-170817T0015Z/
Rice MN-
643 PM CDT WED AUG 16 2017

...THE TORNADO WARNING FOR NORTHWESTERN RICE COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 4454 9379 4454 9353 4436 9352 4435 9366
TIME...MOT...LOC 2343Z 154DEG 21KT 4439 9361 

$$

MNC079-170015-
/O.CON.KMPX.TO.W.0038.000000T0000Z-170817T0015Z/
Le Sueur MN-
643 PM CDT WED AUG 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHEASTERN LE SUEUR COUNTY...
    
At 643 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Montgomery, or 17 miles northwest of Faribault,
moving northwest at 25 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...
  New Prague around 705 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Heidelberg.

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.

&&

LAT...LON 4454 9379 4454 9353 4436 9352 4435 9366
TIME...MOT...LOC 2343Z 154DEG 21KT 4439 9361 

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

$$

BORGHOFF

065 
WWUS53 KMPX 162354
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
654 PM CDT WED AUG 16 2017

MNC079-170015-
/O.CON.KMPX.TO.W.0038.000000T0000Z-170817T0015Z/
Le Sueur MN-
654 PM CDT WED AUG 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHEASTERN LE SUEUR COUNTY...
    
At 654 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Heidelberg, or 23 miles northwest of Faribault,
moving north at 35 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
northeastern Le Sueur County, including the following locations:
Heidelberg.

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.

&&

LAT...LON 4454 9379 4454 9353 4444 9352 4444 9371
TIME...MOT...LOC 2354Z 159DEG 29KT 4449 9367 

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

$$

BORGHOFF

267 
WWUS53 KMPX 170012
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
712 PM CDT WED AUG 16 2017

MNC079-170022-
/O.EXP.KMPX.TO.W.0038.000000T0000Z-170817T0015Z/
Le Sueur MN-
712 PM CDT WED AUG 16 2017

...THE TORNADO WARNING FOR NORTHEASTERN LE SUEUR COUNTY WILL EXPIRE
AT 715 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A tornado watch remains in effect until 1000 PM CDT for south central
Minnesota.

LAT...LON 4454 9379 4454 9353 4444 9352 4444 9371
TIME...MOT...LOC 0012Z 153DEG 21KT 4458 9374 

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 4:37 PM CDT	Tornado Warning	MPX	Blue Earth, Nicollet	23 min
Aug 16, 5:09 PM CDT	Tornado Warning	MPX	Nicollet, Sibley	36 min
Aug 16, 5:14 PM CDT	Tornado Warning Tornado observed	MPX	Nicollet	46 min
Aug 16, 5:35 PM CDT	Tornado Warning Tornado observed	MPX	Sibley	55 min
Aug 16, 6:05 PM CDT	Tornado Warning Tornado observed	MPX	Sibley	40 min
Aug 16, 6:29 PM CDT	Tornado Warning	MPX	McLeod, Sibley	46 min
Aug 16, 6:41 PM CDT	Tornado Warning	MPX	Sibley	38 min

Nearby

Tornado Warnings in Minnesota, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.