Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 50, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at Jul 26, 2021, 11:58 PM CDT for 4 counties in Wisconsin. It was in force for 62 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
- Jul 26, 2021, 11:58 PM CDT (04:58 UTC)
- Expired
- Jul 27, 2021, 1:00 AM CDT
- In force
- 62 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Marathon County, WI, Outagamie County, WI, Portage County, WI, Waupaca County, WI
The radar
The Green Bay radar (KGRB), 59 km from the middle of the area, began a volume at 04:57 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 |
|---|---|---|---|
| Jul 27, 1:00 AM CDT | TSTM WND DMG | Appleton, WI | TREES AND POWER LINES DOWN. TIME ESTIMATED BY RADAR. |
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 00:00Z, 5.0 hours before the alert went out and 60 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
- 591 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 2073 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.0
The text
As transmitted.
777
WUUS53 KGRB 270458
SVRGRB
WIC073-087-097-135-270600-
/O.NEW.KGRB.SV.W.0050.210727T0458Z-210727T0600Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
1158 PM CDT Mon Jul 26 2021
The National Weather Service in Green Bay has issued a
* Severe Thunderstorm Warning for...
Northeastern Portage County in central Wisconsin...
Southeastern Marathon County in central Wisconsin...
Waupaca County in northeastern Wisconsin...
Outagamie County in northeastern Wisconsin...
* Until 100 AM CDT.
* At 1157 PM CDT, severe thunderstorms were located along a line
extending from near Neopit to 9 miles southeast of Wittenberg to
near Bevent, moving southeast at 55 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Severe thunderstorms will be near...
Clintonville around 1215 AM CDT.
New London around 1230 AM CDT.
Waupaca around 1240 AM CDT.
Appleton around 1245 AM CDT.
Kaukauna, Little Chute, Kimberly and Fremont around 1250 AM CDT.
Darboy around 1255 AM CDT.
Other locations impacted by these severe thunderstorms include
Nichols, Fitzgerald Corners, Mackville, Leeman, Schmidt Corner,
Northport, Sugar Bush, Rose Lawn, North Star and Freedom.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a DANGEROUS SITUATION. These storms are producing widespread
wind damage across northern Wisconsin. SEEK SHELTER NOW inside a
sturdy structure and stay away from windows!
&&
LAT...LON 4425 8898 4479 8965 4477 8922 4468 8922
4468 8861 4459 8861 4459 8819 4424 8819
TIME...MOT...LOC 0457Z 314DEG 46KT 4494 8875 4471 8905 4474 8948
HAIL...0.75IN
WIND...70MPH
$$
Kurimski2 follow-up statements
671
WWUS53 KGRB 270534
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
1234 AM CDT Tue Jul 27 2021
WIC073-097-270543-
/O.CAN.KGRB.SV.W.0050.000000T0000Z-210727T0600Z/
Portage WI-Marathon WI-
1234 AM CDT Tue Jul 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PORTAGE AND
SOUTHEASTERN MARATHON COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4444 8922 4463 8913 4468 8861 4459 8861
4459 8819 4424 8819 4425 8898
TIME...MOT...LOC 0533Z 319DEG 49KT 4463 8830 4437 8862 4438 8905
$$
WIC087-135-270600-
/O.CON.KGRB.SV.W.0050.000000T0000Z-210727T0600Z/
Waupaca WI-Outagamie WI-
1234 AM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR WAUPACA AND OUTAGAMIE COUNTIES...
At 1233 AM CDT, severe thunderstorms were located along a line
extending from near Pulaski to 6 miles east of New London to near
Waupaca, moving southeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Appleton around 1245 AM CDT.
Kimberly and Darboy around 1250 AM CDT.
Other locations impacted by these severe thunderstorms include
Nichols, Fitzgerald Corners, Mackville, Leeman, Schmidt Corner,
Northport, Sugar Bush, Rose Lawn, Freedom and Scandinavia.
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.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4444 8922 4463 8913 4468 8861 4459 8861
4459 8819 4424 8819 4425 8898
TIME...MOT...LOC 0533Z 319DEG 49KT 4463 8830 4437 8862 4438 8905
HAIL...<.75IN
WIND...60MPH
$$
Kurimski320
WWUS53 KGRB 270554
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
1254 AM CDT Tue Jul 27 2021
WIC087-135-270604-
/O.EXP.KGRB.SV.W.0050.000000T0000Z-210727T0600Z/
Waupaca WI-Outagamie WI-
1254 AM CDT Tue Jul 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR WAUPACA AND OUTAGAMIE COUNTIES
WILL EXPIRE AT 100 AM CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with these thunderstorms.
LAT...LON 4444 8922 4463 8913 4468 8861 4459 8861
4459 8819 4424 8819 4425 8898
TIME...MOT...LOC 0554Z 314DEG 46KT 4445 8803 4419 8836 4420 8878
$$
KurimskiThe office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 8:26 PM CDT | Special Weather Statement | GRB | Door | 49 min |
| Jul 26, 8:33 PM CDT | Special Marine Warning | GRB | 36 min | |
| Jul 26, 9:43 PM CDT | Special Weather Statement | GRB | Vilas | 62 min |
| Jul 26, 10:30 PM CDT | Severe Thunderstorm Warning | GRB | Forest, Vilas | 50 min |
| Jul 26, 10:37 PM CDT | Special Weather Statement | GRB | Langlade, Lincoln | 53 min |
| Jul 26, 10:45 PM CDT | Severe Thunderstorm Warning | GRB | Lincoln, Oneida | 45 min |
| Jul 26, 11:06 PM CDT | Severe Thunderstorm Warning | GRB | Florence | 54 min |
| Jul 26, 11:11 PM CDT | Severe Thunderstorm Warning | GRB | Florence, Forest, Langlade, Lincoln, Marathon, Oneida | 49 min |
| Jul 26, 11:33 PM CDT | Severe Thunderstorm Warning | GRB | Marinette, Menominee, Oconto, Shawano | 57 min |
| Jul 26, 11:39 PM CDT | Special Weather Statement | GRB | Marinette | 36 min |
| Jul 27, 12:16 AM CDT | Special Marine Warning | GRB | 89 min | |
| Jul 27, 12:24 AM CDT | Severe Thunderstorm Warning | GRB | Brown, Marinette, Oconto, Shawano | 66 min |
| Jul 27, 12:37 AM CDT | Special Marine Warning | GRB | 83 min | |
| Jul 27, 12:51 AM CDT | Severe Thunderstorm Warning | GRB | Door, Kewaunee | 54 min |
| Jul 27, 12:52 AM CDT | Special Weather Statement | GRB | Calumet, Winnebago | 38 min |
| Jul 27, 12:55 AM CDT | Special Weather Statement | GRB | Manitowoc | 35 min |
| Jul 27, 1:18 AM CDT | Special Weather Statement | GRB | Oneida | 42 min |
| Jul 27, 1:28 AM CDT | Severe Thunderstorm Warning | GRB | Oneida | 32 min |
| Jul 27, 1:42 AM CDT | Special Weather Statement | GRB | Manitowoc | 48 min |
| Jul 27, 1:53 AM CDT | Special Weather Statement | GRB | Lincoln | 52 min |
| Jul 27, 2:30 AM CDT | Special Weather Statement | GRB | Langlade | 45 min |
| Jul 27, 2:41 AM CDT | Special Weather Statement | GRB | Langlade, Lincoln, Marathon, Menominee, Shawano | 49 min |
| Jul 27, 3:20 AM CDT | Special Weather Statement | GRB | Brown, Marathon, Menominee, Outagamie, Portage, Shawano and 2 more | 40 min |
| Jul 27, 3:51 AM CDT | Special Weather Statement | GRB | Brown, Calumet, Kewaunee, Manitowoc, Marathon, Outagamie and 6 more | 69 min |
| Jul 27, 6:16 AM CDT | Special Weather Statement | GRB | Portage, Wood | 44 min |
| Jul 27, 6:58 AM CDT | Special Weather Statement | GRB | Portage, Wood | 47 min |
| Jul 27, 7:27 AM CDT | Special Weather Statement | GRB | Waushara | 63 min |
| Jul 27, 8:33 AM CDT | Special Weather Statement | GRB | Calumet, Manitowoc, Portage, Waushara, Winnebago, Wood | 57 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.