Alert archive / Wisconsin / Tornado Warnings in 2015

Tornado Warning 10, NWS Milwaukee, WI

September 17, 2015Green County, Lafayette County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Sep 17, 2015, 7:57 PM CDT for Green County, Lafayette County, Wisconsin. It was in force for 33 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 17, 2015, 7:57 PM CDT (00:57 UTC)
Expired: Sep 17, 2015, 8:30 PM CDT
In force: 33 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Green County, WI, Lafayette County, WI

The radar

The Quad Cities radar (KDVN), 118 km from the middle of the area, began a volume at 00:57 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

Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 115 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: 1343 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1492 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 495 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 15.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

751 
WFUS53 KMKX 180057
TORMKX
WIC045-065-180130-
/O.NEW.KMKX.TO.W.0010.150918T0057Z-150918T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
757 PM CDT THU SEP 17 2015

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN LAFAYETTE COUNTY IN SOUTH CENTRAL WISCONSIN...
  WEST CENTRAL GREEN COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 830 PM CDT
    
* AT 755 PM CDT...TWO SEVERE THUNDERSTORMS CAPABLE OF PRODUCING 
  TORNADOES WERE LOCATED NEAR APPLE RIVER...AND NORTH NEAR SOUTH 
  WAYNE...MOVING NORTHEAST 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. 

* THESE DANGEROUS STORMS WILL BE NEAR... ARGYLE AROUND 820 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE JORDAN
CENTER...WIOTA...BROWNTOWN...SOUTH WAYNE...GRATIOT...WOODFORD AND
SOMERS.

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 4251 9012 4252 9012 4257 9015 4282 8981
      4262 8967 4251 8994
TIME...MOT...LOC 0055Z 234DEG 32KT 4255 9005 

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

$$

BSH

2 follow-up statements

244 
WWUS53 KMKX 180111
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
811 PM CDT THU SEP 17 2015

WIC045-065-180130-
/O.CON.KMKX.TO.W.0010.000000T0000Z-150918T0130Z/
LAFAYETTE WI-GREEN WI-
811 PM CDT THU SEP 17 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN LAFAYETTE AND WEST CENTRAL GREEN COUNTIES...
    
AT 810 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 7 MILES SOUTHWEST OF ARGYLE...OR 10 MILES SOUTHEAST OF
DARLINGTON...MOVING NORTHEAST AT 30 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...
  ARGYLE AROUND 825 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE JORDAN
CENTER...WIOTA...BROWNTOWN...SOUTH WAYNE...GRATIOT...WOODFORD AND
SOMERS.

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 4251 8997 4262 9008 4282 8981 4262 8967
      4251 8994
TIME...MOT...LOC 0110Z 233DEG 28KT 4261 8994 

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

$$

MARQUARDT

957 
WWUS53 KMKX 180127
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
827 PM CDT THU SEP 17 2015

WIC045-065-180136-
/O.EXP.KMKX.TO.W.0010.000000T0000Z-150918T0130Z/
LAFAYETTE WI-GREEN WI-
827 PM CDT THU SEP 17 2015

...THE TORNADO WARNING FOR SOUTHEASTERN LAFAYETTE AND WEST CENTRAL
GREEN COUNTIES WILL EXPIRE AT 830 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.

REMEMBER...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR
WESTERN CENTRAL GREEN COUNTY UNTIL 845 PM.

LAT...LON 4251 8997 4262 9008 4282 8981 4262 8967
      4251 8994
TIME...MOT...LOC 0125Z 234DEG 32KT 4261 8994 

$$

MARQUARDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 7:45 PM CDT	Tornado Warning	MKX	Lafayette	15 min
Sep 17, 7:48 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	27 min
Sep 17, 7:51 PM CDT	Severe Thunderstorm Warning	MKX	Jefferson, Rock, Walworth	24 min
Sep 17, 8:20 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Lafayette	25 min
Sep 17, 8:40 PM CDT	Severe Thunderstorm Warning	MKX	Green	35 min
Sep 17, 8:49 PM CDT	Areal Flood Advisory	MKX	Dane, Jefferson	3 hr
Sep 17, 9:11 PM CDT	Flash Flood Warning	MKX	Jefferson	3 hr
Sep 17, 9:15 PM CDT	Severe Thunderstorm Warning	MKX	Green, Rock	45 min
Sep 17, 10:01 PM CDT	Flash Flood Warning	MKX	Jefferson, Kenosha, Racine, Walworth, Waukesha	3 hr
Sep 17, 10:49 PM CDT	Flash Flood Warning	MKX	Kenosha	3 hr
Sep 17, 11:34 PM CDT	Areal Flood Advisory	MKX	Green, Rock	116 min
Sep 17, 11:41 PM CDT	Special Marine Warning	MKX		94 min
Sep 18, 3:51 AM CDT	Flash Flood Watch	MKX	Dane, Green, Jefferson, Kenosha, Lafayette, Milwaukee and 4 more	23 hr
Sep 18, 5:15 AM CDT	Small Craft Advisory	MKX		35 hr

Nearby

Tornado Warnings in Wisconsin, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.