Alert archive / Wisconsin / Tornado Warnings in 2019

Tornado Warning 55, NWS Twin Cities, MN

September 24, 2019Saint Croix County, Wisconsin

NWS Twin Cities, MN issued this tornado warning at Sep 24, 2019, 7:03 PM CDT for Saint Croix County, Wisconsin. It was in force for 27 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 24, 2019, 7:03 PM CDT (00:03 UTC)
Expired: Sep 24, 2019, 7:30 PM CDT
In force: 27 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 86 km from the middle of the area, began a volume at 00:05 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 24, 4:43 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 88 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: 1764 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1238 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

As transmitted.

223 
WFUS53 KMPX 250003
TORMPX
WIC109-250030-
/O.NEW.KMPX.TO.W.0055.190925T0003Z-190925T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Twin Cities/Chanhassen MN
703 PM CDT Tue Sep 24 2019

The National Weather Service in The Twin Cities has issued a

* Tornado Warning for...
  Central St. Croix County in west central Wisconsin...

* Until 730 PM CDT.
    
* At 701 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Roberts, or 10 miles north of River Falls, moving
  east at 35 mph.

  HAZARD...Tornado and quarter size hail.

  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...
  Hammond around 715 PM CDT.
  Baldwin around 720 PM CDT.

Other locations impacted by this tornadic thunderstorm include Cylon
and Houlton.

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 4497 9265 4505 9265 4515 9230 4496 9227
TIME...MOT...LOC 0001Z 259DEG 30KT 4502 9259 

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

$$

CTG

3 follow-up statements

839 
WWUS53 KMPX 250009
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
709 PM CDT Tue Sep 24 2019

WIC109-250030-
/O.CON.KMPX.TO.W.0055.000000T0000Z-190925T0030Z/
St. Croix WI-
709 PM CDT Tue Sep 24 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR CENTRAL
ST. CROIX COUNTY...
    
At 709 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Roberts, or 13 miles northeast of River Falls,
moving east at 35 mph.

HAZARD...Tornado and quarter size hail.

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...
  Baldwin around 715 PM CDT.

Other locations impacted by this tornadic thunderstorm include Cylon.

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 4497 9256 4505 9258 4515 9230 4496 9227
TIME...MOT...LOC 0009Z 259DEG 30KT 4503 9249 

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

$$

CTG

505 
WWUS53 KMPX 250019
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
719 PM CDT Tue Sep 24 2019

WIC109-250030-
/O.CON.KMPX.TO.W.0055.000000T0000Z-190925T0030Z/
St. Croix WI-
719 PM CDT Tue Sep 24 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR EAST
CENTRAL ST. CROIX COUNTY...
    
At 719 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Baldwin, or 17 miles northeast of River Falls,
moving east at 35 mph.

HAZARD...Tornado and quarter size hail.

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
east central St. Croix County.

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 4497 9243 4505 9245 4512 9229 4496 9227
TIME...MOT...LOC 0019Z 259DEG 30KT 4505 9237 

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

$$

CTG

825 
WWUS53 KMPX 250025
SVSMPX

Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
725 PM CDT Tue Sep 24 2019

WIC109-250035-
/O.EXP.KMPX.TO.W.0055.000000T0000Z-190925T0030Z/
St. Croix WI-
725 PM CDT Tue Sep 24 2019

...THE TORNADO WARNING FOR EAST CENTRAL ST. CROIX COUNTY WILL EXPIRE
AT 730 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 midnight CDT for west central
Wisconsin.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
The Twin Cities.

LAT...LON 4497 9243 4505 9245 4512 9229 4496 9227
TIME...MOT...LOC 0025Z 259DEG 30KT 4506 9231 

$$

CTG

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 24, 7:46 PM CDT	Tornado Warning	MPX	Chippewa, Dunn	29 min
Sep 24, 8:23 PM CDT	Tornado Warning	MPX	Chippewa	37 min
Sep 24, 8:59 PM CDT	Tornado Warning	MPX	Eau Claire	11 min

Nearby

Tornado Warnings in Wisconsin, 2019 Every tornado warning in 2019 Tornadoes in 2019

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.