Alert archive / Wisconsin / Tornado Warnings in 2015

Tornado Warning 6, NWS Milwaukee, WI

July 18, 2015Rock County, Walworth County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Jul 18, 2015, 2:45 PM CDT for Rock County, Walworth County, Wisconsin. It was in force for 30 min. 3 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: Jul 18, 2015, 2:45 PM CDT (19:45 UTC)
Expired: Jul 18, 2015, 3:15 PM CDT
In force: 30 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Rock County, WI, Walworth County, WI

The radar

The Milwaukee radar (KMKX), 24 km from the middle of the area, began a volume at 19:45 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
Jul 18, 2:47 PM CDT	TSTM WND DMG	10 S Whitewater, WI	MACHINE SHED BLOWN DOWN AT THE JUNCTION OF HIGHWAY 89 AND COUNTY ROAD M.
Jul 18, 2:47 PM CDT	TORNADO	10 S Whitewater, WI	MACHINE SHED BLOWN DOWN AT THE JUNCTION OF HIGHWAY 89 AND COUNTY ROAD M. WITNESSES SAW DEBRIS ROTATING. OCCURED 1.5 MILE EAST OF COUNTY LINE. PRELIMINARY SURVEY BY COUNTY OFFICIALS INDICATES A TORNADO. COUNTY TRUNK M.
Jul 18, 3:00 PM CDT	FUNNEL CLOUD	East Troy, WI	MULTIPLE REPORTS OF FUNNEL CLOUDS IN WALWORTH COUNTY

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
Jul 18, 1:31 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 7.8 hours before the alert went out and 200 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: 2984 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 858 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

166 
WFUS53 KMKX 181945
TORMKX
WIC105-127-182015-
/O.NEW.KMKX.TO.W.0006.150718T1945Z-150718T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
245 PM CDT SAT JUL 18 2015

THE NATIONAL WEATHER SERVICE IN MILWAUKEE/SULLIVAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN WALWORTH COUNTY IN SOUTHEASTERN WISCONSIN...
  EAST CENTRAL ROCK COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 315 PM CDT
    
* AT 245 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES SOUTH OF WHITEWATER...MOVING NORTHEAST
  AT 40 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...
  MUKWONAGO...EAST TROY AND POTTER LAKE AROUND 315 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
MILLARD...RICHMOND...TIBBETS...ABELLS CORNERS...LA GRANGE AND TROY
CENTER.

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 4273 8884 4285 8865 4284 8831 4278 8831
      4264 8877
TIME...MOT...LOC 1945Z 239DEG 33KT 4272 8875 

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

$$

SPM

2 follow-up statements

112 
WWUS53 KMKX 181950
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
250 PM CDT SAT JUL 18 2015

WIC105-182000-
/O.CAN.KMKX.TO.W.0006.000000T0000Z-150718T2015Z/
ROCK WI-
250 PM CDT SAT JUL 18 2015

...THE TORNADO WARNING FOR EAST CENTRAL ROCK COUNTY IS CANCELLED...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT 
OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR SOUTHEASTERN
WISCONSIN.

LAT...LON 4265 8878 4277 8878 4285 8866 4284 8831
      4278 8831 4264 8877
TIME...MOT...LOC 1950Z 273DEG 25KT 4270 8871 

$$

WIC127-182015-
/O.CON.KMKX.TO.W.0006.000000T0000Z-150718T2015Z/
WALWORTH WI-
250 PM CDT SAT JUL 18 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR NORTHERN
WALWORTH COUNTY...
    
AT 250 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR DARIEN...OR 8 MILES NORTHWEST OF DELAVAN LAKE...
MOVING EAST AT 30 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...
  ELKHORN AROUND 310 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
MILLARD...RICHMOND...TIBBETS...ABELLS CORNERS...LA GRANGE AND TROY
CENTER.

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 4265 8878 4277 8878 4285 8866 4284 8831
      4278 8831 4264 8877
TIME...MOT...LOC 1950Z 273DEG 25KT 4270 8871 

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

$$

WOOD

076 
WWUS53 KMKX 182002
SVSMKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
302 PM CDT SAT JUL 18 2015

WIC127-182015-
/O.CON.KMKX.TO.W.0006.000000T0000Z-150718T2015Z/
WALWORTH WI-
302 PM CDT SAT JUL 18 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CDT FOR NORTHERN
WALWORTH COUNTY...
    
AT 301 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED OVER EAST TROY...MOVING EAST 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
NORTHERN WALWORTH COUNTY...INCLUDING THE FOLLOWING LOCATIONS...
MILLARD...TIBBETS...ABELLS CORNERS...LA GRANGE AND TROY CENTER.

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 4284 8831 4278 8831 4267 8868 4285 8861
TIME...MOT...LOC 2001Z 282DEG 32KT 4279 8838 

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

$$

WOOD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 4:19 AM CDT	Special Weather Statement	MKX	Columbia, Green Lake, Iowa, Marquette, Sauk	56 min
Jul 18, 4:45 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Green Lake, Marquette, Sauk	45 min
Jul 18, 5:15 AM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dodge, Fond du Lac, Green Lake, Marquette	45 min
Jul 18, 5:27 AM CDT	Special Marine Warning	MKX		2 hr
Jul 18, 5:47 AM CDT	Special Weather Statement	MKX	Dane, Dodge, Fond du Lac, Jefferson, Milwaukee, Ozaukee and 3 more	58 min
Jul 18, 6:11 AM CDT	Special Weather Statement	MKX	Dane	34 min
Jul 18, 7:07 AM CDT	Special Marine Warning	MKX		53 min
Jul 18, 1:08 PM CDT	Tornado Warning	MKX	Iowa, Lafayette	52 min
Jul 18, 1:26 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Rock	34 min
Jul 18, 1:49 PM CDT	Special Weather Statement	MKX	Jefferson, Washington	41 min
Jul 18, 1:57 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	18 min
Jul 18, 1:59 PM CDT	Severe Thunderstorm Warning	MKX	Dane, Green, Jefferson, Rock	31 min
Jul 18, 2:07 PM CDT	Special Weather Statement	MKX	Walworth	23 min
Jul 18, 2:09 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Racine, Walworth	51 min
Jul 18, 2:15 PM CDT	Areal Flood Advisory	MKX	Green, Racine, Rock, Walworth	60 min
Jul 18, 2:24 PM CDT	Severe Thunderstorm Warning	MKX	Dodge, Green, Jefferson, Rock, Walworth, Washington and 1 more	51 min
Jul 18, 2:31 PM CDT	Special Marine Warning	MKX		119 min
Jul 18, 2:40 PM CDT	Areal Flood Advisory	MKX	Kenosha, Milwaukee, Racine, Waukesha	2 hr
Jul 18, 2:55 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine, Rock, Walworth, Waukesha	35 min
Jul 18, 3:04 PM CDT	Tornado Warning	MKX	Kenosha, Racine, Walworth	26 min
Jul 18, 3:22 PM CDT	Severe Thunderstorm Warning	MKX	Kenosha, Milwaukee, Racine	38 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.