Alert archive / Wisconsin / Tornado Warnings in 2017

Tornado Warning 7, NWS Milwaukee, WI

July 19, 2017Iowa County, Sauk County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Jul 19, 2017, 7:01 PM CDT for Iowa County, Sauk County, Wisconsin. It was in force for 29 min. 1 report 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 19, 2017, 7:01 PM CDT (00:01 UTC)
Expired
Jul 19, 2017, 7:30 PM CDT
In force
29 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), 109 km from the middle of the area, began a volume at 00:02 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

TimeReportWhereRemark
Jul 19, 7:34 PM CDTTSTM WND DMGArena, WIDELAYED REPORT. TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.

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.

IssuedProductOfficeLasted
Jul 19, 5:45 PM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.0 hours before the alert went out and 178 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2017-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1032 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2017-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1032 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
1506 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

147 
WFUS53 KMKX 200001
TORMKX
WIC049-111-200030-
/O.NEW.KMKX.TO.W.0007.170720T0001Z-170720T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
701 PM CDT WED JUL 19 2017

The National Weather Service in Milwaukee/Sullivan has issued a

* Tornado Warning for...
  Northern Iowa County in south central Wisconsin...
  Southwestern Sauk County in south central Wisconsin...

* Until 730 PM CDT

* At 701 PM CDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located near
  Muscoda, or 11 miles southwest of Richland Center, moving east at
  55 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. 

* These dangerous storms will be near...
  Spring Green around 725 PM CDT. 

Other locations impacted by this tornadic thunderstorm include Orion,
Plain, Avoca and Arena.

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.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4320 9043 4321 9029 4319 9028 4319 9025
      4317 9020 4330 9019 4333 8983 4322 8983
      4321 8984 4306 8984 4308 9043
TIME...MOT...LOC 0001Z 263DEG 50KT 4319 9050 

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

$$

SPM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 7:10 PM CDTSevere Thunderstorm WarningMKXDane, Green, Rock80 min
Jul 19, 7:24 PM CDTSevere Thunderstorm WarningMKXColumbia, Sauk81 min
Jul 19, 7:34 PM CDTSpecial Weather StatementMKXGreen Lake, Marquette26 min
Jul 19, 7:48 PM CDTTornado WarningMKXDane, Green, Rock42 min
Jul 19, 7:53 PM CDTSevere Thunderstorm WarningMKXJefferson, Rock, Walworth67 min
Jul 19, 8:28 PM CDTSpecial Marine WarningMKX2 hr
Jul 19, 8:29 PM CDTSpecial Weather StatementMKXDodge, Fond du Lac, Green Lake, Washington31 min
Jul 19, 8:37 PM CDTSevere Thunderstorm WarningMKXKenosha, Racine, Walworth26 min
Jul 19, 8:40 PM CDTSpecial Weather StatementMKXMilwaukee, Waukesha2 hr
Jul 19, 9:02 PM CDTSpecial Weather StatementMKXKenosha58 min
Jul 19, 9:16 PM CDTSpecial Weather StatementMKXColumbia, Dane, Dodge44 min
Jul 19, 9:32 PM CDTAreal Flood AdvisoryMKXDane118 min
Jul 19, 10:03 PM CDTSpecial Marine WarningMKX87 min
Jul 19, 10:09 PM CDTSpecial Weather StatementMKXDodge, Jefferson, Kenosha, Milwaukee, Ozaukee, Racine and 5 more81 min
Jul 19, 10:28 PM CDTHigh Wind WarningMKXDane, Dodge, Green, Jefferson, Kenosha, Milwaukee and 6 more2 hr
Jul 19, 10:35 PM CDTSpecial Marine WarningMKX85 min
Jul 20, 12:26 AM CDTSpecial Weather StatementMKXColumbia, Sauk94 min
Jul 20, 12:33 AM CDTAreal Flood AdvisoryMKXSauk6 hr
Jul 20, 1:20 AM CDTAreal Flood AdvisoryMKXDane3 hr
Jul 20, 1:50 AM CDTSpecial Weather StatementMKXSauk55 min
Jul 20, 2:26 AM CDTAreal Flood AdvisoryMKXDane, Iowa, Sauk3 hr
Jul 20, 3:12 AM CDTAreal Flood AdvisoryMKXGreen, Lafayette3 hr
Jul 20, 3:42 AM CDTSpecial Weather StatementMKXIowa78 min
Jul 20, 5:07 AM CDTSpecial Weather StatementMKXGreen, Lafayette38 min
Jul 20, 6:08 AM CDTSpecial Weather StatementMKXKenosha, Walworth52 min
Jul 20, 7:03 AM CDTRiver Flood WarningMKXSauk7 days
Jul 20, 7:03 AM CDTRiver Flood WarningMKXSauk4 days
Jul 20, 7:03 AM CDTRiver Flood WarningMKXSauk9 days
Jul 20, 9:54 AM CDTRiver Flood WarningMKXRock3 days
Jul 20, 10:04 AM CDTRiver Flood WarningMKXLafayette34 hr
Jul 20, 10:04 AM CDTRiver Flood WarningMKXGreen13 days
Jul 20, 10:04 AM CDTRiver Flood WarningMKXLafayette4 days
Jul 20, 10:08 AM CDTRiver Flood WatchMKXGreen, Rock4 days
Jul 20, 1:30 PM CDTFlash Flood WatchMKXColumbia, Dane, Dodge, Green, Iowa, Jefferson and 9 more41 hr
Jul 20, 5:41 PM CDTRiver Flood WarningMKXGreen, Rock8 days

Nearby

Tornado Warnings in Wisconsin, 2017Every tornado warning in 2017Tornadoes in 2017

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.