Alert archive / Wisconsin / Tornado Warnings in 2018

Tornado Warning 17, NWS Milwaukee, WI

October 9, 2018Iowa County, Sauk County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Oct 9, 2018, 4:29 PM CDT for Iowa County, Sauk County, Wisconsin. It was in force for 31 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: Oct 9, 2018, 4:29 PM CDT (21:29 UTC)
Expired: Oct 9, 2018, 5:00 PM CDT
In force: 31 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Iowa County, WI, Sauk County, WI

The radar

The La Crosse radar (KARX), 115 km from the middle of the area, began a volume at 21:30 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 12:00Z, 9.5 hours before the alert went out and 179 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: 459 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

426 
WFUS53 KMKX 092129
TORMKX
WIC049-111-092200-
/O.NEW.KMKX.TO.W.0017.181009T2129Z-181009T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
429 PM CDT TUE OCT 9 2018

The National Weather Service in Milwaukee/Sullivan has issued a

* Tornado Warning for...
  North central Iowa County in south central Wisconsin...
  South central Sauk County in south central Wisconsin...

* Until 500 PM CDT.
    
* At 429 PM CDT, a severe thunderstorm capable of producing a 
  tornado was located near Spring Green, or 13 miles north of 
  Dodgeville, moving northeast 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
  north central Iowa and south central Sauk Counties, including the
  following locations... Plain.


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 4312 9004 4313 9019 4332 9012 4330 8990
TIME...MOT...LOC 2129Z 219DEG 32KT 4316 9010 

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

$$

GEHRING

1 follow-up statement

095 
WWUS53 KMKX 092158
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
458 PM CDT TUE OCT 9 2018

WIC049-111-092207-
/O.EXP.KMKX.TO.W.0017.000000T0000Z-181009T2200Z/
Iowa WI-Sauk WI-
458 PM CDT TUE OCT 9 2018

...THE TORNADO WARNING FOR NORTH CENTRAL IOWA AND SOUTH CENTRAL SAUK
COUNTIES WILL EXPIRE AT 500 PM CDT...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning will be allowed to expire.

LAT...LON 4312 9004 4313 9019 4332 9012 4330 8990
TIME...MOT...LOC 2157Z 219DEG 32KT 4335 8989 

$$

GEHRING

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 3:16 AM CDT	Flood Watch	MKX	Iowa, Lafayette, Sauk	32 hr
Oct 9, 2:31 PM CDT	Severe Thunderstorm Warning	MKX	Iowa, Lafayette	29 min
Oct 9, 2:54 PM CDT	Severe Thunderstorm Warning	MKX	Iowa	31 min
Oct 9, 3:10 PM CDT	Gale Watch	MKX		12 hr
Oct 9, 3:10 PM CDT	Small Craft Advisory	MKX		30 hr
Oct 9, 4:47 PM CDT	Severe Thunderstorm Warning	MKX	Columbia	28 min
Oct 9, 4:47 PM CDT	Tornado Warning	MKX	Marquette	43 min
Oct 9, 4:56 PM CDT	Special Weather Statement	MKX	Sauk	34 min
Oct 9, 5:07 PM CDT	Severe Thunderstorm Warning	MKX	Marquette	38 min
Oct 9, 6:14 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Dane, Dodge	46 min
Oct 9, 6:43 PM CDT	Special Weather Statement	MKX	Green Lake	47 min
Oct 9, 6:52 PM CDT	Severe Thunderstorm Warning	MKX	Fond du Lac, Green Lake	38 min

Nearby

Tornado Warnings in Wisconsin, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.