Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 44, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 10, 2021, 5:08 PM CDT for 5 counties in Wisconsin. It was in force for 67 min. 13 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
- Aug 10, 2021, 5:08 PM CDT (22:08 UTC)
- Expired
- Aug 10, 2021, 6:15 PM CDT
- In force
- 67 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Columbia County, WI, Dane County, WI, Green County, WI, Iowa County, WI, Sauk County, WI
The radar
The Milwaukee radar (KMKX), 93 km from the middle of the area, began a volume at 22:10 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 |
|---|---|---|---|
| Aug 10, 5:25 PM CDT | TSTM WND DMG | Black Earth, WI | TREES AND WIRES DOWN. |
| Aug 10, 5:30 PM CDT | TSTM WND DMG | Cross Plains, WI | TREES AND WIRES DOWN. |
| Aug 10, 5:35 PM CDT | TSTM WND GST 51 | 3 Ene Monroe, WI | |
| Aug 10, 5:40 PM CDT | TSTM WND GST 50 | 1 Nw Waunakee, WI | |
| Aug 10, 5:42 PM CDT | TSTM WND DMG | Middleton, WI | TREES AND WIRES DOWN. |
| Aug 10, 5:43 PM CDT | TSTM WND GST 51 | 1 Wnw Middleton, WI | MDD. |
| Aug 10, 5:48 PM CDT | TSTM WND GST 53 | 1 E Shorewood Hills, WI | ON TOP OF BLDG ON UW-MADISON CAMPUS. |
| Aug 10, 5:48 PM CDT | TSTM WND GST 60 | 1 Sse Portage, WI | EST 40-60 MPH GUSTS WITH BRANCHES DOWN AND HOUSE STRUCK BY LIGHTNING. |
| Aug 10, 5:50 PM CDT | TSTM WND DMG | Madison, WI | TREES AND WIRES DOWN. |
| Aug 10, 5:53 PM CDT | TSTM WND GST 43 | 3 Nne Maple Bluff, WI | MSN - DANE COUNTY REGIONAL AIRPORT. |
| Aug 10, 5:54 PM CDT | TSTM WND GST 50 | 1 W Windsor, WI | |
| Aug 10, 5:57 PM CDT | TSTM WND DMG | Oregon, WI | TREES AND WIRES DOWN. |
| Aug 10, 6:00 PM CDT | TSTM WND DMG | Cottage Grove, WI | TREES AND WIRES DOWN. |
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 10, 3:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 165 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.
- Mixed-layer CAPE
- 3755 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -37 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
173
WUUS53 KMKX 102208
SVRMKX
WIC021-025-045-049-111-102315-
/O.NEW.KMKX.SV.W.0044.210810T2208Z-210810T2315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
508 PM CDT Tue Aug 10 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Severe Thunderstorm Warning for...
Green County in south central Wisconsin...
Iowa County in south central Wisconsin...
Columbia County in south central Wisconsin...
Dane County in south central Wisconsin...
Sauk County in south central Wisconsin...
* Until 615 PM CDT.
* At 507 PM CDT, severe thunderstorms were located along a line
extending from 10 miles north of Portage to near Sauk City to near
Apple River, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Madison, Sun Prairie, Fitchburg, Middleton, Stoughton, Waunakee,
Baraboo, Monroe, Verona, Portage, Oregon, Reedsburg, McFarland,
Monona, Mount Horeb, Windsor, Columbus, Dodgeville, Prairie Du Sac
and Marshall.
People attending The Belleville Community Picnic should seek safe
shelter immediately!
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4252 8983 4281 8984 4282 9023 4317 9021
4317 9019 4364 9020 4363 8901 4324 8901
4285 8928 4284 8937 4251 8936
TIME...MOT...LOC 2207Z 232DEG 31KT 4369 8952 4326 8962 4254 9015
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KAVINSKY3 follow-up statements
963
WWUS53 KMKX 102228
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
528 PM CDT Tue Aug 10 2021
WIC021-025-045-049-111-102315-
/O.CON.KMKX.SV.W.0044.000000T0000Z-210810T2315Z/
Green WI-Iowa WI-Columbia WI-Dane WI-Sauk WI-
528 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR GREEN...IOWA...COLUMBIA...DANE AND SAUK COUNTIES...
At 527 PM CDT, severe thunderstorms were located along a line
extending from 9 miles north of Portage to near Lodi to near Warren,
moving east at 20 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Sun Prairie, Fitchburg, Middleton, Stoughton, Waunakee,
Baraboo, Monroe, Verona, Portage, Oregon, Reedsburg, McFarland,
Monona, Mount Horeb, Windsor, Columbus, Dodgeville, Prairie Du Sac
and Marshall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4252 8983 4281 8984 4282 9023 4317 9021
4317 9019 4364 9020 4363 8901 4324 8901
4285 8928 4284 8937 4251 8936
TIME...MOT...LOC 2227Z 248DEG 16KT 4368 8945 4325 8955 4254 8995
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KAVINSKY133
WWUS53 KMKX 102247
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
547 PM CDT Tue Aug 10 2021
WIC049-102256-
/O.CAN.KMKX.SV.W.0044.000000T0000Z-210810T2315Z/
Iowa WI-
547 PM CDT Tue Aug 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR IOWA COUNTY IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area.Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Wisconsin.
LAT...LON 4252 8982 4318 8983 4321 8984 4319 8988
4322 8997 4364 8998 4363 8901 4324 8901
4285 8927 4284 8937 4251 8937
TIME...MOT...LOC 2246Z 342DEG 69KT 4378 8928 4287 8941 4256 8972
$$
WIC021-025-045-111-102315-
/O.CON.KMKX.SV.W.0044.000000T0000Z-210810T2315Z/
Green WI-Columbia WI-Dane WI-Sauk WI-
547 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR GREEN...COLUMBIA...DANE AND EASTERN SAUK COUNTIES...
At 546 PM CDT, severe thunderstorms were located along a line
extending from near Montello to near Brooklyn to near Monroe, moving
south at 80 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Sun Prairie, Fitchburg, Middleton, Stoughton, Waunakee,
Baraboo, Monroe, Verona, Portage, Oregon, Reedsburg, McFarland,
Monona, Mount Horeb, Windsor, Columbus, Prairie Du Sac, Marshall and
Sauk City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4252 8982 4318 8983 4321 8984 4319 8988
4322 8997 4364 8998 4363 8901 4324 8901
4285 8927 4284 8937 4251 8937
TIME...MOT...LOC 2246Z 342DEG 69KT 4378 8928 4287 8941 4256 8972
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KAVINSKY078
WWUS53 KMKX 102256
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
556 PM CDT Tue Aug 10 2021
WIC021-025-045-111-102315-
/O.CON.KMKX.SV.W.0044.000000T0000Z-210810T2315Z/
Green WI-Columbia WI-Dane WI-Sauk WI-
556 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM CDT
FOR GREEN...COLUMBIA...DANE AND EASTERN SAUK COUNTIES...
At 556 PM CDT, severe thunderstorms were located along a line
extending from near Princeton to near Oregon to Monroe, moving east
at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Trees were reported down in Madison.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Madison, Sun Prairie, Fitchburg, Middleton, Stoughton, Waunakee,
Baraboo, Monroe, Verona, Portage, Oregon, Reedsburg, McFarland,
Monona, Mount Horeb, Windsor, Columbus, Prairie Du Sac, Marshall and
Sauk City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4252 8982 4318 8983 4321 8984 4319 8988
4322 8997 4364 8998 4363 8901 4324 8901
4285 8927 4284 8937 4251 8937
TIME...MOT...LOC 2256Z 270DEG 31KT 4383 8920 4292 8933 4261 8964
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
KAVINSKYThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:13 PM CDT | Marine Dense Fog Advisory | MKX | 14 hr | |
| Aug 10, 2:16 PM CDT | Heat Advisory | MKX | Dane, Dodge, Green, Iowa, Jefferson, Kenosha and 8 more | 29 hr |
| Aug 10, 4:02 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Iowa, Lafayette, Sauk | 73 min |
| Aug 10, 4:25 PM CDT | Severe Thunderstorm Warning | MKX | Iowa, Lafayette | 80 min |
| Aug 10, 5:36 PM CDT | Special Weather Statement | MKX | Rock | 39 min |
| Aug 10, 5:42 PM CDT | Severe Thunderstorm Warning | MKX | Dane, Dodge, Jefferson, Rock | 78 min |
| Aug 10, 6:08 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Jefferson, Kenosha, Racine, Walworth, Washington and 1 more | 97 min |
| Aug 10, 6:12 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane | 20 min |
| Aug 10, 6:24 PM CDT | Special Marine Warning | MKX | 111 min | |
| Aug 10, 6:44 PM CDT | Special Weather Statement | MKX | Fond du Lac, Sheboygan | 76 min |
| Aug 10, 6:51 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Milwaukee, Ozaukee, Racine | 54 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.