Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 64, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Sep 7, 2021, 8:57 AM CDT for Green Lake County, Marquette County, Wisconsin. It was in force for 48 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
- Sep 7, 2021, 8:57 AM CDT (13:57 UTC)
- Expired
- Sep 7, 2021, 9:45 AM CDT
- In force
- 48 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Green Lake County, WI, Marquette County, WI
The radar
The Green Bay radar (KGRB), 111 km from the middle of the area, began a volume at 13:57 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 |
|---|---|---|---|
| Sep 7, 9:18 AM CDT | HAIL 1 | Berlin, WI |
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, 2.0 hours before the alert went out and 110 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
- 14 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -120 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted.
022
WUUS53 KMKX 071357
SVRMKX
WIC047-077-071445-
/O.NEW.KMKX.SV.W.0064.210907T1357Z-210907T1445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Milwaukee/Sullivan WI
857 AM CDT Tue Sep 7 2021
The National Weather Service in Milwaukee/Sullivan has issued a
* Severe Thunderstorm Warning for...
Northern Green Lake County in south central Wisconsin...
Northern Marquette County in south central Wisconsin...
* Until 945 AM CDT.
* At 857 AM CDT, a severe thunderstorm was located 8 miles northwest
of Princeton, or 9 miles south of Wautoma, moving east at 60 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* Locations impacted include...
Berlin, Montello, Westfield, Princeton, Green Lake, Oxford,
Neshkoro and Harrisville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4384 8889 4376 8955 4387 8952 4398 8945
4398 8889
TIME...MOT...LOC 1357Z 259DEG 52KT 4393 8927
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
WOOD4 follow-up statements
661
WWUS53 KMKX 071407
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
907 AM CDT Tue Sep 7 2021
WIC047-077-071445-
/O.CON.KMKX.SV.W.0064.000000T0000Z-210907T1445Z/
Green Lake WI-Marquette WI-
907 AM CDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR NORTHERN GREEN LAKE AND NORTHEASTERN MARQUETTE COUNTIES...
At 907 AM CDT, a severe thunderstorm was located near Berlin, moving
east at 60 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Berlin, Montello, Princeton, Green Lake and Neshkoro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4384 8889 4379 8933 4384 8936 4398 8926
4398 8889
TIME...MOT...LOC 1407Z 259DEG 52KT 4396 8908
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
WOOD885
WWUS53 KMKX 071417
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
917 AM CDT Tue Sep 7 2021
WIC077-071426-
/O.CAN.KMKX.SV.W.0064.000000T0000Z-210907T1445Z/
Marquette WI-
917 AM CDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARQUETTE COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4398 8889 4384 8889 4381 8920 4387 8920
4388 8917 4398 8912
TIME...MOT...LOC 1416Z 259DEG 52KT 4399 8889
$$
WIC047-071445-
/O.CON.KMKX.SV.W.0064.000000T0000Z-210907T1445Z/
Green Lake WI-
917 AM CDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR NORTHERN GREEN LAKE COUNTY...
At 916 AM CDT, a severe thunderstorm was located near Berlin, moving
east at 60 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Berlin, Princeton and Green Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4398 8889 4384 8889 4381 8920 4387 8920
4388 8917 4398 8912
TIME...MOT...LOC 1416Z 259DEG 52KT 4399 8889
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
WOOD700
WWUS53 KMKX 071428
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
928 AM CDT Tue Sep 7 2021
WIC047-071445-
/O.CON.KMKX.SV.W.0064.000000T0000Z-210907T1445Z/
Green Lake WI-
928 AM CDT Tue Sep 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM CDT
FOR EAST CENTRAL GREEN LAKE COUNTY...
At 927 AM CDT, a severe thunderstorm was located near Rush Lake, or
near Ripon, moving east at 45 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...
Green Lake.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4398 8889 4384 8889 4382 8906 4390 8897
TIME...MOT...LOC 1427Z 264DEG 40KT 4389 8889
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
WOOD868
WWUS53 KMKX 071439
SVSMKX
Severe Weather Statement
National Weather Service Milwaukee/Sullivan WI
939 AM CDT Tue Sep 7 2021
WIC047-071449-
/O.EXP.KMKX.SV.W.0064.000000T0000Z-210907T1445Z/
Green Lake WI-
939 AM CDT Tue Sep 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GREEN LAKE COUNTY
WILL EXPIRE AT 945 AM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
LAT...LON 4398 8889 4384 8889 4382 8906 4390 8897
TIME...MOT...LOC 1439Z 259DEG 52KT 4392 8866
$$
WOODThe office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 9:06 PM CDT | Small Craft Advisory | MKX | 45 hr | |
| Sep 7, 2:21 AM CDT | Gale Warning | MKX | 13 hr | |
| Sep 7, 8:41 AM CDT | Special Weather Statement | MKX | Marquette | 49 min |
| Sep 7, 9:34 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 56 min |
| Sep 7, 10:10 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac | 50 min |
| Sep 7, 10:27 AM CDT | Severe Thunderstorm Warning | MKX | Fond du Lac, Sheboygan | 78 min |
| Sep 7, 10:40 AM CDT | Special Weather Statement | MKX | Columbia, Dane, Dodge, Iowa | 65 min |
| Sep 7, 10:57 AM CDT | Special Marine Warning | MKX | 63 min | |
| Sep 7, 11:01 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Dodge, Jefferson | 59 min |
| Sep 7, 11:04 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Fond du Lac, Ozaukee, Sheboygan, Washington | 56 min |
| Sep 7, 11:11 AM CDT | Severe Thunderstorm Warning | MKX | Green, Rock | 34 min |
| Sep 7, 11:22 AM CDT | Special Marine Warning | MKX | 53 min | |
| Sep 7, 11:27 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Ozaukee, Washington, Waukesha | 48 min |
| Sep 7, 11:31 AM CDT | Special Marine Warning | MKX | 89 min | |
| Sep 7, 11:42 AM CDT | Severe Thunderstorm Warning | MKX | Rock, Walworth | 48 min |
| Sep 7, 11:45 AM CDT | Severe Thunderstorm Warning | MKX | Jefferson, Milwaukee, Waukesha | 60 min |
| Sep 7, 12:18 PM CDT | Special Marine Warning | MKX | 87 min | |
| Sep 7, 12:19 PM CDT | Severe Thunderstorm Warning | MKX | Racine, Walworth | 40 min |
| Sep 7, 12:30 PM CDT | Severe Thunderstorm Warning | MKX | Kenosha, Racine, Rock, Walworth | 60 min |
| Sep 7, 12:47 PM CDT | Special Weather Statement | MKX | Milwaukee | 28 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.