Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 60, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 27, 2021, 8:57 AM CDT for Dane County, Iowa County, Sauk County, Wisconsin. It was in force for 48 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 27, 2021, 8:57 AM CDT (13:57 UTC)
- Expired
- Aug 27, 2021, 9:45 AM CDT
- In force
- 48 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Dane County, WI, Iowa County, WI, Sauk County, WI
The radar
The Milwaukee radar (KMKX), 118 km from the middle of the area, began a volume at 13:59 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 nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 2.0 hours before the alert went out and 183 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
- 358 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
606
WUUS53 KMKX 271357
SVRMKX
WIC025-049-111-271445-
/O.NEW.KMKX.SV.W.0060.210827T1357Z-210827T1445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
857 AM CDT Fri Aug 27 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Severe Thunderstorm Warning for...
Northeastern Iowa County in south central Wisconsin...
Northwestern Dane County in south central Wisconsin...
Southern Sauk County in south central Wisconsin...
* Until 945 AM CDT.
* At 856 AM CDT, severe thunderstorms were located along a line
extending from 6 miles northwest of Spring Green to near
Dodgeville, moving northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Baraboo, Dodgeville, Prairie Du Sac, Sauk City, Mazomanie, Spring
Green, Black Earth, Barneveld, Blue Mounds, Arena, Plain,
Bluffview, Ridgeway, Clyde, Governor Dodge St Park, Blue Mound St
Park and Devils Lake St Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4317 9020 4325 9019 4349 8972 4333 8971
4330 8973 4329 8971 4305 8969 4295 9021
4320 9027
TIME...MOT...LOC 1356Z 246DEG 30KT 4325 9014 4304 9012
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HANSEN2 follow-up statements
068
WWUS53 KMKX 271415
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
915 AM CDT Fri Aug 27 2021
WIC025-049-111-271445-
/O.CON.KMKX.SV.W.0060.000000T0000Z-210827T1445Z/
Iowa WI-Dane WI-Sauk WI-
915 AM CDT Fri Aug 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR NORTHEASTERN IOWA...NORTHWESTERN DANE AND SOUTHEASTERN SAUK
COUNTIES...
At 915 AM CDT, severe thunderstorms were located along a line
extending from 10 miles west of Prairie Du Sac to 8 miles southwest
of Mazomanie, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Prairie Du Sac, Sauk City, Mazomanie, Spring Green, Black Earth,
Barneveld, Blue Mounds, Arena, Plain, Bluffview, Ridgeway, Blue Mound
St Park and Devils Lake St Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4324 9011 4344 8972 4333 8971 4330 8973
4329 8971 4305 8969 4298 9005
TIME...MOT...LOC 1415Z 250DEG 32KT 4330 8994 4309 8992
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HANSEN737
WWUS53 KMKX 271437
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
937 AM CDT Fri Aug 27 2021
WIC025-049-111-271446-
/O.EXP.KMKX.SV.W.0060.000000T0000Z-210827T1445Z/
Iowa WI-Dane WI-Sauk WI-
937 AM CDT Fri Aug 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN IOWA...
NORTHWESTERN DANE AND SOUTHEASTERN SAUK COUNTIES WILL EXPIRE AT 945
AM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4324 9011 4344 8972 4333 8971 4330 8973
4329 8971 4305 8969 4298 9005
TIME...MOT...LOC 1436Z 246DEG 30KT 4337 8973 4316 8971
$$
HANSENThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 9:02 AM CDT | Special Weather Statement | MKX | Dodge | 43 min |
| Aug 27, 9:27 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Sauk | 48 min |
| Aug 27, 10:05 AM CDT | Areal Flood Advisory | MKX | Columbia, Sauk | 75 min |
| Aug 27, 10:08 AM CDT | Special Weather Statement | MKX | Columbia | 52 min |
| Aug 27, 10:47 AM CDT | Special Weather Statement | MKX | Dodge, Fond du Lac | 43 min |
| Aug 27, 11:19 AM CDT | Special Weather Statement | MKX | Fond du Lac | 41 min |
| Aug 27, 11:59 AM CDT | Special Weather Statement | MKX | Sheboygan | 31 min |
| Aug 27, 2:46 PM CDT | Special Weather Statement | MKX | Fond du Lac | 44 min |
| Aug 27, 3:24 PM CDT | Special Weather Statement | MKX | Sheboygan | 51 min |
| Aug 27, 4:01 PM CDT | Special Weather Statement | MKX | Dodge | 59 min |
| Aug 27, 4:07 PM CDT | Severe Thunderstorm Warning | MKX | Sheboygan | 26 min |
| Aug 27, 4:09 PM CDT | Special Marine Warning | MKX | 66 min | |
| Aug 27, 4:35 PM CDT | Special Weather Statement | MKX | Washington | 25 min |
| Aug 27, 4:44 PM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington | 46 min |
| Aug 27, 5:28 PM CDT | Special Weather Statement | MKX | Washington | 47 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.