Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 15, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at May 31, 2021, 6:32 PM CDT for Marathon County, Portage County, Wood County, Wisconsin. It was in force for 43 min. 2 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
- May 31, 2021, 6:32 PM CDT (23:32 UTC)
- Expired
- May 31, 2021, 7:15 PM CDT
- In force
- 43 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties Marathon County, WI, Portage County, WI, Wood County, WI
The radar
The La Crosse radar (KARX), 131 km from the middle of the area, began a volume at 23:35 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 |
|---|---|---|---|
| May 31, 6:38 PM CDT | HAIL 0.25 | 1 Nw Marshfield, WI | |
| May 31, 6:40 PM CDT | HAIL 0.75 | 4 Sw Stratford, WI | REPORT FROM MPING: DIME (0.75 IN.). |
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, 11.5 hours before the alert went out and 156 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1526 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
660
WUUS53 KGRB 312332
SVRGRB
WIC073-097-141-010015-
/O.NEW.KGRB.SV.W.0015.210531T2332Z-210601T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
632 PM CDT Mon May 31 2021
The National Weather Service in Green Bay has issued a
* Severe Thunderstorm Warning for...
Northern Wood County in central Wisconsin...
Northwestern Portage County in central Wisconsin...
Southwestern Marathon County in central Wisconsin...
* Until 715 PM CDT.
* At 632 PM CDT, a severe thunderstorm was located near Marshfield,
or 22 miles northeast of Neillsville, moving east at 40 mph.
HAZARD...Half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Stevens Point, Marshfield, Spencer, Whiting, Plover, Knowlton,
Stratford, Hewitt, Sherry and Auburndale.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4471 9032 4483 9028 4472 8945 4444 8961
4460 9032
TIME...MOT...LOC 2332Z 280DEG 34KT 4472 9020
HAIL...1.25IN
WIND...<50MPH
$$
Kieckbusch3 follow-up statements
108
WWUS53 KGRB 312348
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
648 PM CDT Mon May 31 2021
WIC073-097-141-010015-
/O.CON.KGRB.SV.W.0015.000000T0000Z-210601T0015Z/
Wood WI-Portage WI-Marathon WI-
648 PM CDT Mon May 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHERN WOOD...NORTHWESTERN PORTAGE AND SOUTHWESTERN MARATHON
COUNTIES...
At 647 PM CDT, a severe thunderstorm was located 7 miles northeast of
Marshfield, or 24 miles northwest of Wisconsin Rapids, moving east at
35 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe storm will be near...
Stevens Point around 730 PM CDT.
Other locations impacted by this severe thunderstorm include
Milladore, Sherry, Rozellville, Big Eau Pleine County Park, Moon,
Auburndale, Stratford, Hewitt, Blenker and Dancy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People
outside should move to a shelter, inside a strong building and away
from windows.
&&
LAT...LON 4470 9025 4482 9020 4472 8945 4444 8961
4458 9022
TIME...MOT...LOC 2347Z 279DEG 28KT 4471 9003
HAIL...1.00IN
WIND...<50MPH
$$
Bersch109
WWUS53 KGRB 010004
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
704 PM CDT Mon May 31 2021
WIC073-097-141-010015-
/O.CON.KGRB.SV.W.0015.000000T0000Z-210601T0015Z/
Wood WI-Portage WI-Marathon WI-
704 PM CDT Mon May 31 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR NORTHEASTERN WOOD...NORTHWESTERN PORTAGE AND SOUTH CENTRAL
MARATHON COUNTIES...
At 703 PM CDT, a severe thunderstorm was located 11 miles west of
Mosinee, or 20 miles southwest of Wausau, moving east at 25 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
This severe thunderstorm will remain over mainly rural areas of
northeastern Wood, northwestern Portage and south central Marathon
Counties, including the following locations... Milladore, Junction
City, Rozellville, Big Eau Pleine County Park, Moon, Rocky Corners,
Blenker, Dewey Marsh Wildlife Area, Dancy and Knowlton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People
outside should move to a shelter, inside a strong building and away
from windows.
&&
LAT...LON 4470 9006 4480 9004 4472 8945 4452 8956
4461 8994
TIME...MOT...LOC 0003Z 272DEG 22KT 4473 8991
HAIL...1.00IN
WIND...<50MPH
$$
Bersch016
WWUS53 KGRB 010013
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
713 PM CDT Mon May 31 2021
WIC073-097-141-010023-
/O.EXP.KGRB.SV.W.0015.000000T0000Z-210601T0015Z/
Wood WI-Portage WI-Marathon WI-
713 PM CDT Mon May 31 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WOOD...
NORTHWESTERN PORTAGE AND SOUTH CENTRAL MARATHON COUNTIES WILL EXPIRE
AT 715 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
is still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Green Bay.
LAT...LON 4470 9006 4480 9004 4472 8945 4452 8956
4461 8994
TIME...MOT...LOC 0013Z 280DEG 34KT 4472 8980
$$
BerschThe office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 12:20 PM CDT | Special Weather Statement | GRB | Florence | 85 min |
| May 31, 1:38 PM CDT | Special Weather Statement | GRB | Vilas | 67 min |
| May 31, 2:11 PM CDT | Special Weather Statement | GRB | Oneida | 64 min |
| May 31, 3:03 PM CDT | Special Weather Statement | GRB | Forest | 57 min |
| May 31, 3:27 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Oneida | 48 min |
| May 31, 3:39 PM CDT | Special Weather Statement | GRB | Lincoln | 66 min |
| May 31, 3:57 PM CDT | Special Weather Statement | GRB | Vilas | 63 min |
| May 31, 4:12 PM CDT | Special Weather Statement | GRB | Forest, Langlade, Marinette | 63 min |
| May 31, 4:21 PM CDT | Special Weather Statement | GRB | Lincoln | 54 min |
| May 31, 5:00 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Oneida | 45 min |
| May 31, 5:07 PM CDT | Special Weather Statement | GRB | Langlade, Marinette, Menominee | 53 min |
| May 31, 5:22 PM CDT | Special Weather Statement | GRB | Marinette | 38 min |
| May 31, 5:29 PM CDT | Special Marine Warning | GRB | 61 min | |
| May 31, 5:35 PM CDT | Special Weather Statement | GRB | Door | 55 min |
| May 31, 5:42 PM CDT | Special Weather Statement | GRB | Lincoln | 63 min |
| May 31, 5:58 PM CDT | Special Weather Statement | GRB | Kewaunee, Menominee, Oconto, Shawano | 62 min |
| May 31, 6:07 PM CDT | Special Weather Statement | GRB | Marathon | 38 min |
| May 31, 6:10 PM CDT | Special Weather Statement | GRB | Wood | 50 min |
| May 31, 6:19 PM CDT | Special Marine Warning | GRB | 41 min | |
| May 31, 6:43 PM CDT | Special Marine Warning | GRB | 92 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.