Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Milwaukee, WI

July 14, 20215 counties in Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Jul 14, 2021, 5:45 PM CDT for 5 counties in Wisconsin. It was in force for 60 min. 2 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 14, 2021, 5:45 PM CDT (22:45 UTC)
Expired: Jul 14, 2021, 6:45 PM CDT
In force: 60 min
Issued by: NWS Milwaukee, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Columbia County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Marquette County, WI

The radar

The Milwaukee radar (KMKX), 83 km from the middle of the area, began a volume at 22:48 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 14, 5:45 PM CDT	TSTM WND DMG	6 Sw Portage, WI	REPORTS OF DOWNED TREES AND LIMBS AROUND THE CALEDONIA AREA IN COLUMBIA COUNTY. TIME ESTIMATED VIA RADAR.
Jul 14, 5:55 PM CDT	TSTM WND DMG	1 Ne Poynette, WI	REPORTS OF DOWNED TREES AND LIMBS AROUND THE POYNETTE AREA. TIME ESTIMATED VIA RADAR.

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

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.8 hours before the alert went out and 141 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: 579 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

720 
WUUS53 KMKX 142245
SVRMKX
WIC021-027-039-047-077-142345-
/O.NEW.KMKX.SV.W.0009.210714T2245Z-210714T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
545 PM CDT Wed Jul 14 2021

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for...
  Southern Green Lake County in south central Wisconsin...
  West central Fond du Lac County in east central Wisconsin...
  Columbia County in south central Wisconsin...
  Southeastern Marquette County in south central Wisconsin...
  Northwestern Dodge County in southeastern Wisconsin...

* Until 645 PM CDT.

* At 544 PM CDT, a severe thunderstorm was located over Portage,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Beaver Dam, Portage, Lake Wisconsin, Poynette, Pardeeville,
  Randolph, Markesan, Rio, Cambria, Fox Lake, Alto, Manchester,
  Wyocena, Otsego, Fairwater, Friesland, Kingston, Doylestown,
  Marquette and Astico.

This includes the following Locations Pine Island State Wildlife
Area, Historic Indian Agency House, French Creek Wildlife Area, and
Alliant Energy Portage Power Plant.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 4334 8956 4364 8960 4382 8882 4344 8871
TIME...MOT...LOC 2244Z 258DEG 33KT 4354 8947 

HAIL...1.00IN
WIND...60MPH
 
$$

CMILLER

3 follow-up statements

963 
WWUS53 KMKX 142313
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
613 PM CDT Wed Jul 14 2021

WIC021-027-039-047-077-142345-
/O.CON.KMKX.SV.W.0009.000000T0000Z-210714T2345Z/
Green Lake WI-Fond du Lac WI-Columbia WI-Marquette WI-Dodge WI-
613 PM CDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHERN GREEN LAKE...WEST CENTRAL FOND DU LAC...NORTHEASTERN
COLUMBIA...SOUTHEASTERN MARQUETTE AND NORTHWESTERN DODGE COUNTIES...

At 613 PM CDT, a severe thunderstorm was located over Randolph, or 16
miles northwest of Beaver Dam, moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Beaver Dam, Pardeeville, Randolph, Markesan, Rio, Cambria, Fox Lake,
Alto, Manchester, Wyocena, Otsego, Fairwater, Friesland, Kingston,
Doylestown, Astico, South Beaver Dam and Dalton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight CDT for south
central Wisconsin.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4338 8931 4370 8929 4382 8882 4344 8871
TIME...MOT...LOC 2313Z 258DEG 33KT 4360 8911 

HAIL...<.75IN
WIND...60MPH
 
$$

CMILLER

166 
WWUS53 KMKX 142326
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
626 PM CDT Wed Jul 14 2021

WIC077-142335-
/O.CAN.KMKX.SV.W.0009.000000T0000Z-210714T2345Z/
Marquette WI-
626 PM CDT Wed Jul 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARQUETTE COUNTY
IS CANCELLED...
    
The severe 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 midnight CDT for south
central Wisconsin.

LAT...LON 4340 8914 4374 8912 4382 8882 4344 8871
TIME...MOT...LOC 2325Z 258DEG 33KT 4362 8895 

$$

WIC021-027-039-047-142345-
/O.CON.KMKX.SV.W.0009.000000T0000Z-210714T2345Z/
Green Lake WI-Fond du Lac WI-Columbia WI-Dodge WI-
626 PM CDT Wed Jul 14 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHEASTERN GREEN LAKE...WEST CENTRAL FOND DU LAC...NORTHEASTERN
COLUMBIA AND NORTHWESTERN DODGE COUNTIES...

At 625 PM CDT, a severe thunderstorm was located near Randolph, or 11
miles west of Waupun, moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Beaver Dam, Randolph, Markesan, Cambria, Fox Lake, Alto, Manchester,
Fairwater, Friesland, Kingston, Doylestown, Astico and South Beaver
Dam.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until midnight CDT for south
central Wisconsin.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4340 8914 4374 8912 4382 8882 4344 8871
TIME...MOT...LOC 2325Z 258DEG 33KT 4362 8895 

HAIL...<.75IN
WIND...60MPH
 
$$

CMILLER

233 
WWUS53 KMKX 142341
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
641 PM CDT Wed Jul 14 2021

WIC021-027-039-047-142350-
/O.EXP.KMKX.SV.W.0009.000000T0000Z-210714T2345Z/
Green Lake WI-Fond du Lac WI-Columbia WI-Dodge WI-
641 PM CDT Wed Jul 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GREEN LAKE...WEST
CENTRAL FOND DU LAC...NORTHEASTERN COLUMBIA AND NORTHWESTERN DODGE
COUNTIES WILL EXPIRE AT 645 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However gusty winds are still possible with
this thunderstorm.

A Tornado Watch remains in effect until midnight CDT for south
central Wisconsin.

LAT...LON 4340 8914 4374 8912 4382 8882 4344 8871
TIME...MOT...LOC 2340Z 270DEG 33KT 4365 8877 

$$

CMILLER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 12:22 PM CDT	Special Weather Statement	MKX	Iowa, Lafayette, Sauk	53 min
Jul 14, 12:50 PM CDT	Severe Thunderstorm Warning	MKX	Lafayette	40 min
Jul 14, 1:15 PM CDT	Severe Thunderstorm Warning	MKX	Green, Lafayette	45 min
Jul 14, 1:20 PM CDT	Special Weather Statement	MKX	Columbia, Dane	55 min
Jul 14, 1:53 PM CDT	Special Weather Statement	MKX	Rock	52 min
Jul 14, 2:36 PM CDT	Special Weather Statement	MKX	Jefferson, Walworth	54 min
Jul 14, 3:15 PM CDT	Special Weather Statement	MKX	Kenosha, Milwaukee, Racine, Walworth, Waukesha	60 min
Jul 14, 3:38 PM CDT	Special Weather Statement	MKX	Washington	37 min
Jul 14, 4:04 PM CDT	Special Marine Warning	MKX		26 min
Jul 14, 4:15 PM CDT	Special Marine Warning	MKX		60 min
Jul 14, 5:08 PM CDT	Special Weather Statement	MKX	Sauk	37 min
Jul 14, 5:16 PM CDT	Severe Thunderstorm Warning	MKX	Columbia, Sauk	44 min
Jul 14, 6:29 PM CDT	Special Weather Statement	MKX	Fond du Lac	61 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every severe thunderstorm warning 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.