Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 58, NWS Milwaukee, WI

August 24, 2021Lafayette County, Wisconsin

NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 24, 2021, 4:39 PM CDT for Lafayette County, Wisconsin. It was in force for 47 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
Aug 24, 2021, 4:39 PM CDT (21:39 UTC)
Expired
Aug 24, 2021, 5:26 PM CDT
In force
47 min
Issued by
NWS Milwaukee, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Lafayette County, WI

The radar

The Quad Cities radar (KDVN), 117 km from the middle of the area, began a volume at 21:38 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
Aug 24, 4:50 PM CDTTSTM WND DMGShullsburg, WISOME SMALL TREES DOWN ACROSS ROADS, ESTIMATED 40-50 MPH WINDS.

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
Aug 24, 3:55 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.7 hours before the alert went out and 114 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.

984 
WUUS53 KMKX 242139
SVRMKX
WIC065-242245-
/O.NEW.KMKX.SV.W.0058.210824T2139Z-210824T2245Z/

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

The National Weather Service in Milwaukee/Sullivan has issued a

* Severe Thunderstorm Warning for...
  Lafayette County in south central Wisconsin...

* Until 545 PM CDT.

* At 438 PM CDT, severe thunderstorms were located along a line
  extending from near Mineral Point to Scales Mound, moving east at
  30 mph.

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

  SOURCE...Law enforcement. There have been multiple reports of 60 
           mph winds with these storms over the last 30 minutes. 

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

* Locations impacted include...
  Darlington, Shullsburg, Belmont, Argyle, Blanchardville, Apple
  River, Wiota, New Diggings, South Wayne, Fayette, Lamont, Gratiot,
  Calamine, Lead Mine, Yellowstone Lake St Park and Woodford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4251 9037 4281 9038 4281 8984 4251 8984
      4250 8993
TIME...MOT...LOC 2138Z 255DEG 25KT 4282 9026 4249 9026 

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

$$

PATTERSON
2 follow-up statements
615 
WWUS53 KMKX 242208
SVSMKX

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

WIC065-242245-
/O.CON.KMKX.SV.W.0058.000000T0000Z-210824T2245Z/
Lafayette WI-
508 PM CDT Tue Aug 24 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHEASTERN LAFAYETTE COUNTY...

At 508 PM CDT, severe thunderstorms were located along a line
extending from 8 miles northwest of Blanchardville to near Warren,
moving east at 30 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...
Apple River, Wiota, South Wayne, Gratiot and Woodford. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4251 9022 4268 9001 4268 8984 4251 8984
      4250 8993
TIME...MOT...LOC 2208Z 255DEG 25KT 4287 9000 4254 9000 

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

$$

KUROSKI
468 
WWUS53 KMKX 242226
SVSMKX

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

WIC065-242235-
/O.CAN.KMKX.SV.W.0058.000000T0000Z-210824T2245Z/
Lafayette WI-
526 PM CDT Tue Aug 24 2021

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

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

LAT...LON 4251 9022 4268 9001 4268 8984 4251 8984
      4250 8993
TIME...MOT...LOC 2222Z 255DEG 25KT 4290 8987 4257 8987 

$$

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, 4:43 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, 6:10 PM CDTSevere Thunderstorm WarningMKXRock33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.