Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 59, NWS Milwaukee, WI

August 24, 2021Rock County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 24, 2021, 6:10 PM CDT for Rock County, Wisconsin. It was in force for 33 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
Aug 24, 2021, 6:10 PM CDT (23:10 UTC)
Expired
Aug 24, 2021, 6:43 PM CDT
In force
33 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Rock County, WI

The radar

The Milwaukee radar (KMKX), 65 km from the middle of the area, began a volume at 23:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 24, 3:55 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.2 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 12:00Z on 2021-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1809 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 12:00Z on 2021-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 35 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
1809 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1284 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
35 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

183 
WUUS53 KMKX 242310
SVRMKX
WIC105-250000-
/O.NEW.KMKX.SV.W.0059.210824T2310Z-210825T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
610 PM CDT Tue Aug 24 2021

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for...
  Southeastern Rock County in south central Wisconsin...

* Until 700 PM CDT.

* At 609 PM CDT, a severe thunderstorm was located near Beloit,
  moving east at 25 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...
  Beloit, Clinton, Newark, Tiffany, Shopiere and Foxhollow. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4250 8924 4257 8924 4262 8886 4249 8882
TIME...MOT...LOC 2309Z 263DEG 22KT 4252 8915 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

KUROSKI
2 follow-up statements
094 
WWUS53 KMKX 242325
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
625 PM CDT Tue Aug 24 2021

WIC105-250000-
/O.CON.KMKX.SV.W.0059.000000T0000Z-210825T0000Z/
Rock WI-
625 PM CDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SOUTHEASTERN ROCK COUNTY...

At 624 PM CDT, a severe thunderstorm was located over Beloit, moving
east at 25 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...
Beloit, Clinton, Tiffany, Shopiere and Foxhollow. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4250 8908 4258 8912 4262 8886 4249 8882
TIME...MOT...LOC 2324Z 263DEG 22KT 4253 8902 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

KUROSKI
966 
WWUS53 KMKX 242343
SVSMKX

Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
643 PM CDT Tue Aug 24 2021

WIC105-242353-
/O.CAN.KMKX.SV.W.0059.000000T0000Z-210825T0000Z/
Rock WI-
643 PM CDT Tue Aug 24 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ROCK COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However gusty winds and heavy rain are still
possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
south central Wisconsin.

LAT...LON 4250 8908 4258 8912 4262 8886 4249 8882
TIME...MOT...LOC 2341Z 263DEG 22KT 4254 8886 

$$

KUROSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 11:52 AM CDTSpecial Weather StatementMKXGreen Lake, Marquette23 min
Aug 24, 12:01 PM CDTSpecial Weather StatementMKXFond du Lac14 min
Aug 24, 12:53 PM CDTSpecial Marine WarningMKX97 min
Aug 24, 1:06 PM CDTSpecial Weather StatementMKXSheboygan24 min
Aug 24, 2:28 PM CDTSpecial Marine WarningMKX62 min
Aug 24, 3:03 PM CDTSpecial Marine WarningMKX57 min
Aug 24, 3:18 PM CDTSpecial Weather StatementMKXGreen27 min
Aug 24, 3:32 PM CDTSpecial Weather StatementMKXJefferson28 min
Aug 24, 3:35 PM CDTSpecial Weather StatementMKXLafayette25 min
Aug 24, 3:44 PM CDTTornado WarningMKXLafayette31 min
Aug 24, 4:13 PM CDTSevere Thunderstorm WarningMKXLafayette32 min
Aug 24, 4:18 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette27 min
Aug 24, 4:39 PM CDTSevere Thunderstorm WarningMKXLafayette47 min
Aug 24, 4:43 PM CDTSpecial Weather StatementMKXWalworth32 min
Aug 24, 4:56 PM CDTSpecial Weather StatementMKXGreen34 min
Aug 24, 5:28 PM CDTSpecial Weather StatementMKXGreen47 min
Aug 24, 5:47 PM CDTSpecial Weather StatementMKXRock58 min
Aug 24, 6:42 PM CDTSpecial Weather StatementMKXWalworth48 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.