Alert archive / Wisconsin / Tornado Warnings in 2015

Tornado Warning 6, NWS La Crosse, WI

July 18, 2015Grant County, Wisconsin

NWS La Crosse, WI issued this tornado warning at Jul 18, 2015, 12:31 PM CDT for Grant County, Wisconsin. It was in force for 44 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, 12:31 PM CDT (17:31 UTC)
Expired: Jul 18, 2015, 1:15 PM CDT
In force: 44 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Grant County, WI

The radar

The La Crosse radar (KARX), 122 km from the middle of the area, began a volume at 17:34 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, 12:58 PM CDT	FUNNEL CLOUD	3 W Platteville, WI
Jul 18, 1:07 PM CDT	TSTM WND GST 50	1 Se Platteville, WI	ESTIMATED 40 TO 50 MPH.
Jul 18, 1:10 PM CDT	TSTM WND GST 56	Platteville, WI	UW PLATTEVILLE

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 5.5 hours before the alert went out and 130 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.

659 
WFUS53 KARX 181731
TORARX
WIC043-181815-
/O.NEW.KARX.TO.W.0006.150718T1731Z-150718T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1231 PM CDT SAT JUL 18 2015

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL GRANT COUNTY IN SOUTHWESTERN WISCONSIN...

* UNTIL 115 PM CDT
    
* AT 1229 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR BALLTOWN...OR 10 MILES SOUTHWEST OF
  LANCASTER...MOVING EAST 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...
  LANCASTER AROUND 1245 PM CDT.
  PLATTEVILLE AROUND 1255 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
ARTHUR...POTOSI...LIVINGSTON...ELLENBORO AND TENNYSON.

THIS WARNING EXTENDS THE TORNADO WARNING ALREADY IN EFFECT FOR GRANT COUNTY.
THE TORNADO WARNING IS NO LONGER IN EFFECT FOR SOUTHEASTERN CLAYTON COUNTY
IN NORTHEAST IOWA.

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 4278 9093 4295 9043 4269 9043 4268 9088
TIME...MOT...LOC 1729Z 249DEG 35KT 4272 9081 

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

$$

ECKBERG

2 follow-up statements

031 
WWUS53 KARX 181744
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1244 PM CDT SAT JUL 18 2015

WIC043-181815-
/O.CON.KARX.TO.W.0006.000000T0000Z-150718T1815Z/
GRANT WI-
1244 PM CDT SAT JUL 18 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR EAST
CENTRAL GRANT COUNTY...
    
AT 1243 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 8 MILES NORTHWEST OF DICKEYVILLE...OR 8 MILES SOUTH OF
LANCASTER...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 DANGEROUS STORM WILL BE NEAR...
  PLATTEVILLE AROUND 100 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
ARTHUR...POTOSI...LIVINGSTON...ELLENBORO AND TENNYSON.

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 4281 9076 4291 9043 4269 9043 4269 9079
TIME...MOT...LOC 1743Z 254DEG 30KT 4273 9067 

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

$$

ECKBERG

812 
WWUS53 KARX 181758
SVSARX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1258 PM CDT SAT JUL 18 2015

WIC043-181815-
/O.CON.KARX.TO.W.0006.000000T0000Z-150718T1815Z/
GRANT WI-
1258 PM CDT SAT JUL 18 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR EAST
CENTRAL GRANT COUNTY...
    
AT 1254 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS JUST WEST OF PLATTEVILLE...MOVING EAST AT 40 MPH.

HAZARD...TORNADO. 

SOURCE...TRAINED SPOTTERS INDICATED A FUNNEL 2.5 MILES WEST OF 
         PLATTEVILLE 

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 IMPACT PLATTEVILLE.

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 4277 9070 4285 9043 4269 9043 4269 9070
TIME...MOT...LOC 1754Z 255DEG 35KT 4274 9052 

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

$$

DAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 1:23 AM CDT	Severe Thunderstorm Warning	ARX	Buffalo	67 min
Jul 18, 1:36 AM CDT	Special Weather Statement	ARX	Trempealeau	84 min
Jul 18, 2:06 AM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	54 min
Jul 18, 2:24 AM CDT	Special Weather Statement	ARX	Clark, Jackson, La Crosse, Monroe, Taylor	66 min
Jul 18, 2:32 AM CDT	Severe Thunderstorm Warning	ARX	Clark, Taylor	73 min
Jul 18, 2:43 AM CDT	Severe Thunderstorm Warning	ARX	Jackson, La Crosse, Monroe, Trempealeau	77 min
Jul 18, 3:09 AM CDT	Special Weather Statement	ARX	Vernon	66 min
Jul 18, 3:21 AM CDT	Special Weather Statement	ARX	Adams, Juneau	114 min
Jul 18, 3:36 AM CDT	Areal Flood Advisory	ARX	La Crosse	114 min
Jul 18, 3:37 AM CDT	Severe Thunderstorm Warning	ARX	Adams, Juneau	68 min
Jul 18, 4:02 AM CDT	Special Weather Statement	ARX	Crawford, Grant, Richland	73 min
Jul 18, 10:38 AM CDT	Special Weather Statement	ARX	Grant	37 min
Jul 18, 11:26 AM CDT	Special Weather Statement	ARX	Grant	49 min
Jul 18, 12:03 PM CDT	Tornado Warning	ARX	Grant	27 min
Jul 18, 1:14 PM CDT	Tornado Warning	ARX	Grant	16 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.