Alert archive / Minnesota / Tornado Warnings in 2017

Tornado Warning 34, NWS Twin Cities, MN

August 16, 2017Nicollet County, Minnesota

NWS Twin Cities, MN issued this tornado warning at Aug 16, 2017, 5:14 PM CDT for Nicollet County, Minnesota. It was in force for 46 min. 2 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: Aug 16, 2017, 5:14 PM CDT (22:14 UTC)
Expired: Aug 16, 2017, 6:00 PM CDT
In force: 46 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Nicollet County, MN

The radar

The Minneapolis radar (KMPX), 74 km from the middle of the area, began a volume at 22:18 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
Aug 16, 5:35 PM CDT	TORNADO	1 N New Sweden, MN	TORNADO REPORTED BY SKYWARN JUST NORTH OF NEW SWEDEN NEAR INTERSECTION OF HWY 22 AND CO ROAD 111.
Aug 16, 5:42 PM CDT	TORNADO	3 N New Sweden, MN	TORNADO REPORTED NEAR SIBLEY AND NICOLLET CO BORDER NEAR HWY 22, NORTH OF NEW SWEDEN.

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.2 hours before the alert went out and 72 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.

630 
WFUS53 KMPX 162214
TORMPX
MNC103-162300-
/O.NEW.KMPX.TO.W.0034.170816T2214Z-170816T2300Z/

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

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Northeastern Nicollet County in south central Minnesota...

* Until 600 PM CDT

* At 513 PM CDT, a confirmed tornado was located over Nicollet, or 12
  miles northwest of Mankato, moving north at 25 mph.

  HAZARD...Damaging tornado. 

  SOURCE...Weather spotters confirmed tornado. 

  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 Nicollet County.

This includes U.S. Highway 14 between mile markers 116 and 121.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4445 9438 4446 9437 4446 9414 4445 9413
      4424 9411 4423 9422
TIME...MOT...LOC 2213Z 163DEG 21KT 4428 9418 

TORNADO...OBSERVED
HAIL...<.75IN

$$

jrb

4 follow-up statements

141 
WWUS53 KMPX 162220
SVSMPX

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

MNC103-162300-
/O.CON.KMPX.TO.W.0034.000000T0000Z-170816T2300Z/
Nicollet MN-
520 PM CDT WED AUG 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR
NORTHEASTERN NICOLLET COUNTY...
    
At 520 PM CDT, a confirmed tornado was located near Nicollet, or 12
miles east of New Ulm, moving north at 25 mph.

HAZARD...Damaging tornado. 

SOURCE...Weather spotters confirmed tornado. 

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 Nicollet County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4445 9438 4446 9437 4446 9414 4445 9413
      4429 9411 4429 9425
TIME...MOT...LOC 2220Z 165DEG 22KT 4433 9420 

TORNADO...OBSERVED
HAIL...<.75IN

$$

jrb

872 
WWUS53 KMPX 162230
SVSMPX

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

MNC103-162300-
/O.CON.KMPX.TO.W.0034.000000T0000Z-170816T2300Z/
Nicollet MN-
530 PM CDT WED AUG 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR
NORTHEASTERN NICOLLET COUNTY...
    
At 529 PM CDT, a confirmed tornado was located near New Sweden, or 13
miles northeast of New Ulm, moving north at 20 mph.

HAZARD...Damaging tornado. 

SOURCE...Weather spotters confirmed tornado. 

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 track just west of New Sweden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 4446 9433 4446 9414 4445 9413 4439 9412
      4433 9415 4433 9426
TIME...MOT...LOC 2229Z 162DEG 18KT 4440 9422 

TORNADO...OBSERVED
HAIL...<.75IN

$$

BORGHOFF

647 
WWUS53 KMPX 162243
SVSMPX

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

MNC103-162300-
/O.CON.KMPX.TO.W.0034.000000T0000Z-170816T2300Z/
Nicollet MN-
543 PM CDT WED AUG 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR NORTH
CENTRAL NICOLLET COUNTY...
    
At 542 PM CDT, a confirmed large and extremely dangerous tornado was
located over New Sweden, or 15 miles northeast of New Ulm, moving
north at 20 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado. 

SOURCE...Weather spotters confirmed tornado. 

IMPACT...You are in a life-threatening situation. Flying debris may 
         be deadly to those caught without shelter. Mobile homes 
         will be destroyed. Considerable damage to homes, 
         businesses, and vehicles is likely and complete destruction 
         is possible. 

This tornadic thunderstorm will remain over mainly rural areas of
north central Nicollet County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A large and extremely dangerous tornado is on the ground. take
immediate tornado precautions. this is an emergency situation.

&&

LAT...LON 4446 9433 4446 9414 4439 9418 4440 9424
TIME...MOT...LOC 2242Z 170DEG 16KT 4445 9423 

TORNADO...OBSERVED
TORNADO DAMAGE THREAT...CONSIDERABLE
HAIL...<.75IN

$$

BORGHOFF

416 
WWUS53 KMPX 162300
SVSMPX

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

MNC103-162309-
/O.EXP.KMPX.TO.W.0034.000000T0000Z-170816T2300Z/
Nicollet MN-
600 PM CDT WED AUG 16 2017

...THE TORNADO WARNING FOR NORTH CENTRAL NICOLLET COUNTY WILL EXPIRE
AT 600 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 4446 9433 4446 9414 4439 9418 4440 9424
TIME...MOT...LOC 2259Z 163DEG 21KT 4451 9427 

$$

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, 5:35 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, 6:31 PM CDT	Tornado Warning	MPX	Le Sueur, Rice	44 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.