Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 7, NWS Milwaukee, WI

July 29, 2021Rock County, Wisconsin

NWS Milwaukee, WI issued this tornado warning at Jul 29, 2021, 1:36 AM CDT for Rock County, Wisconsin. It was in force for 24 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 29, 2021, 1:36 AM CDT (06:36 UTC)
Expired
Jul 29, 2021, 2:00 AM CDT
In force
24 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Rock County, WI

The radar

The Milwaukee radar (KMKX), 65 km from the middle of the area, began a volume at 06:39 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 29, 1:41 AM CDTTSTM WND GST 685 Ese Footville, WI

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 28, 7:17 PM CDTSevere Thunderstorm Watch PDSSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.6 hours before the alert went out and 155 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 2021-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4022 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 2021-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.193958Sfc1 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
4022 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
1022 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
1.0
Supercell composite
6.8

Open this sounding in Storm Lab

The text

As transmitted.

487 
WFUS53 KMKX 290636
TORMKX
WIC105-290700-
/O.NEW.KMKX.TO.W.0007.210729T0636Z-210729T0700Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Milwaukee/Sullivan WI
136 AM CDT Thu Jul 29 2021

The National Weather Service in Milwaukee/Sullivan has issued a

* Tornado Warning for...
  Southern Rock County in south central Wisconsin...

* Until 200 AM CDT.

* At 136 AM CDT, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located
  along a line extending from near Footville to near Brodhead, moving
  southeast 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.

* Locations impacted include...
  Janesville, Beloit, South Beloit, Brodhead, Clinton, Orfordville,
  Footville, Newark, Tiffany, Hanover, Afton, Shopiere, Avon,
  Foxhollow and Leyden.

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 line 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 4250 8936 4263 8937 4277 8911 4250 8877
      4249 8878
TIME...MOT...LOC 0636Z 328DEG 27KT 4268 8912 4259 8931 

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

$$

WAGNER
1 follow-up statement
468 
WWUS53 KMKX 290654
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
154 AM CDT Thu Jul 29 2021

WIC105-290704-
/O.EXP.KMKX.TO.W.0007.000000T0000Z-210729T0700Z/
Rock WI-
154 AM CDT Thu Jul 29 2021

...THE TORNADO WARNING FOR SOUTHERN ROCK COUNTY WILL EXPIRE AT 200 AM
CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer appear capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
south central and southeastern Wisconsin.


LAT...LON 4250 8936 4263 8937 4277 8911 4250 8877
      4249 8878
TIME...MOT...LOC 0654Z 328DEG 27KT 4258 8903 4249 8922 

$$

WAGNER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 11:18 PM CDTSevere Thunderstorm WarningMKXFond du Lac, Green Lake, Marquette72 min
Jul 28, 11:41 PM CDTTornado WarningMKXFond du Lac20 min
Jul 28, 11:48 PM CDTSpecial Weather StatementMKXSauk42 min
Jul 28, 11:55 PM CDTSevere Thunderstorm WarningMKXDodge, Washington65 min
Jul 29, 12:22 AM CDTSevere Thunderstorm WarningMKXColumbia, Dane, Sauk53 min
Jul 29, 12:26 AM CDTTornado WarningMKXColumbia, Dodge31 min
Jul 29, 12:43 AM CDTTornado WarningMKXColumbia, Dane, Dodge, Jefferson32 min
Jul 29, 12:45 AM CDTSevere Thunderstorm WarningMKXDane, Jefferson45 min
Jul 29, 12:51 AM CDTSevere Thunderstorm WarningMKXDane, Iowa, Sauk39 min
Jul 29, 12:57 AM CDTSevere Thunderstorm WarningMKXDodge, Washington48 min
Jul 29, 1:07 AM CDTSevere Thunderstorm WarningMKXGreen, Lafayette38 min
Jul 29, 1:08 AM CDTTornado WarningMKXJefferson, Waukesha37 min
Jul 29, 1:17 AM CDTSevere Thunderstorm WarningMKXDane, Jefferson, Kenosha, Milwaukee, Racine, Rock and 2 more67 min
Jul 29, 1:24 AM CDTSpecial Marine WarningMKX96 min
Jul 29, 1:31 AM CDTTornado WarningMKXMilwaukee, Racine, Walworth, Waukesha44 min
Jul 29, 1:51 AM CDTSpecial Weather StatementMKXGreen, Lafayette24 min
Jul 29, 4:06 AM CDTSmall Craft AdvisoryMKX33 hr
Jul 29, 2:02 PM CDTBeach Hazards StatementMKXKenosha, Milwaukee, Ozaukee, Racine, Sheboygan29 hr

Nearby

Tornado Warnings in Wisconsin, 2021Every tornado warning in 2021Tornadoes in 2021

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.