Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 84, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at Aug 24, 2021, 7:44 AM CDT for Marathon County, Wood County, Wisconsin. It was in force for 76 min. 6 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 24, 2021, 7:44 AM CDT (12:44 UTC)
- Expired
- Aug 24, 2021, 9:00 AM CDT
- In force
- 76 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Marathon County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 141 km from the middle of the area, began a volume at 12:48 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 24, 8:07 AM CDT | TSTM WND GST 63 | Marshfield, WI | |
| Aug 24, 8:41 AM CDT | HAIL 0.25 | Arpin, WI | |
| Aug 24, 8:46 AM CDT | TSTM WND GST 36 | Wisconsin Rapids, WI | |
| Aug 24, 8:46 AM CDT | TSTM WND GST 39 | Wausau, WI | |
| Aug 24, 8:47 AM CDT | TSTM WND GST 36 | Wisconsin Rapids, WI | |
| Aug 24, 8:47 AM CDT | TSTM WND GST 41 | Mosinee, 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, 0.7 hours before the alert went out and 151 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
- 58 J/kg
- Mixed-layer CIN
- -344 J/kg
- Mixed-layer LCL
- 1387 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
893
WUUS53 KGRB 241244
SVRGRB
WIC073-141-241400-
/O.NEW.KGRB.SV.W.0084.210824T1244Z-210824T1400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
744 AM CDT Tue Aug 24 2021
The National Weather Service in Green Bay has issued a
* Severe Thunderstorm Warning for...
Wood County in central Wisconsin...
Marathon County in central Wisconsin...
* Until 900 AM CDT.
* At 743 AM CDT, severe thunderstorms were located along a line
extending from near Thorp to near Neillsville to Black River Falls,
moving east at 35 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.
* Severe thunderstorms will be near...
Abbotsford around 825 AM CDT.
Babcock around 840 AM CDT.
Lake Wazeecha around 900 AM CDT.
Other locations impacted by these severe thunderstorms include
Milladore, Sandhill Wildlife Area, Edgar, North Wood County Park, Big
Eau Pleine County Park, Moon, Little Chicago, Auburndale, March
Rapids and Hamburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4503 9031 4504 9020 4512 9020 4512 8960
4469 8963 4468 8985 4451 8984 4451 8973
4425 8973 4425 9032
TIME...MOT...LOC 1243Z 268DEG 31KT 4504 9080 4458 9055 4429 9081
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kurimski3 follow-up statements
400
WWUS53 KGRB 241256
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
756 AM CDT Tue Aug 24 2021
WIC073-141-241400-
/O.CON.KGRB.SV.W.0084.000000T0000Z-210824T1400Z/
Wood WI-Marathon WI-
756 AM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT
FOR WOOD AND MARATHON COUNTIES...
At 756 AM CDT, severe thunderstorms were located along a line
extending from near Owen to near Spencer to near Millston, moving
east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe storms will be near...
Marshfield and Spencer around 800 AM CDT.
Abbotsford around 815 AM CDT.
Pittsville and Babcock around 840 AM CDT.
Mosinee around 845 AM CDT.
Wisconsin Rapids around 900 AM CDT.
Lake Wazeecha around 905 AM CDT.
Other locations impacted by these severe thunderstorms include
Milladore, Sandhill Wildlife Area, Edgar, North Wood County Park, Big
Eau Pleine County Park, Moon, Little Chicago, Auburndale, March
Rapids and Hamburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4503 9031 4504 9020 4512 9020 4512 8960
4469 8963 4468 8985 4451 8984 4451 8973
4425 8973 4425 9032
TIME...MOT...LOC 1256Z 260DEG 32KT 4503 9053 4473 9028 4428 9065
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kurimski899
WWUS53 KGRB 241312
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
812 AM CDT Tue Aug 24 2021
WIC073-141-241400-
/O.CON.KGRB.SV.W.0084.000000T0000Z-210824T1400Z/
Wood WI-Marathon WI-
812 AM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT
FOR WOOD AND MARATHON COUNTIES...
At 811 AM CDT, severe thunderstorms were located along a line
extending from near Medford to 8 miles northeast of Marshfield to 12
miles northeast of Millston, moving east at 40 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...
Babcock, Mosinee, Pittsville, Wausau, Rib Mountain, Wisconsin
Rapids and Lake Wazeecha.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4503 9031 4504 9020 4512 9020 4512 8960
4469 8963 4468 8985 4451 8984 4451 8973
4425 8973 4425 9032
TIME...MOT...LOC 1311Z 248DEG 35KT 4508 9027 4477 9008 4430 9044
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Kurimski570
WWUS53 KGRB 241318
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
818 AM CDT Tue Aug 24 2021
WIC073-141-241400-
/O.CON.KGRB.SV.W.0084.000000T0000Z-210824T1400Z/
Wood WI-Marathon WI-
818 AM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM CDT
FOR WOOD AND MARATHON COUNTIES...
At 816 AM CDT, severe thunderstorms were located along a line
extending from 6 miles southeast of Medford to 11 miles northeast of
Marshfield to 12 miles west of Babcock, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Airport observation. At 807 am a wind gust to 63 mph was
measured at Marshfield airport.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Babcock, Mosinee, Pittsville, Wausau, Rib Mountain, Wisconsin
Rapids and Lake Wazeecha.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4503 9031 4504 9020 4512 9020 4512 8960
4469 8963 4468 8985 4451 8984 4451 8973
4425 8973 4425 9032
TIME...MOT...LOC 1316Z 248DEG 35KT 4509 9022 4479 9002 4432 9039
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
KurimskiThe office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 7:23 AM CDT | Special Weather Statement | GRB | Wood | 52 min |
| Aug 24, 8:27 AM CDT | Severe Thunderstorm Warning | GRB | Marathon, Portage, Wood | 63 min |
| Aug 24, 9:02 AM CDT | Special Weather Statement | GRB | Langlade, Menominee, Shawano, Waupaca | 58 min |
| Aug 24, 9:24 AM CDT | Special Weather Statement | GRB | Portage | 51 min |
| Aug 24, 9:37 AM CDT | Special Weather Statement | GRB | Portage | 38 min |
| Aug 24, 9:45 AM CDT | Special Weather Statement | GRB | Waushara | 60 min |
| Aug 24, 9:55 AM CDT | Special Weather Statement | GRB | Portage, Waushara, Winnebago | 50 min |
| Aug 24, 9:58 AM CDT | Special Weather Statement | GRB | Wood | 47 min |
| Aug 24, 10:28 AM CDT | Special Weather Statement | GRB | Marathon, Portage, Wood | 47 min |
| Aug 24, 10:30 AM CDT | Special Weather Statement | GRB | Outagamie, Waupaca, Waushara, Winnebago | 60 min |
| Aug 24, 11:24 AM CDT | Special Weather Statement | GRB | Menominee, Portage, Shawano, Waupaca | 51 min |
| Aug 24, 11:28 AM CDT | Special Weather Statement | GRB | Brown, Calumet, Manitowoc, Outagamie, Waushara, Winnebago | 62 min |
| Aug 24, 11:35 AM CDT | Severe Thunderstorm Warning | GRB | Waushara, Winnebago | 25 min |
| Aug 24, 11:53 AM CDT | Special Marine Warning | GRB | 2 hr | |
| Aug 24, 12:05 PM CDT | Severe Thunderstorm Warning | GRB | Brown, Kewaunee, Manitowoc | 25 min |
| Aug 24, 12:23 PM CDT | Severe Thunderstorm Warning | GRB | Manitowoc | 37 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.