Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS Green Bay, WI
NWS Green Bay, WI issued this severe thunderstorm warning at Apr 27, 2021, 12:00 PM CDT for Marinette County, Wisconsin. It was in force for 22 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
- Apr 27, 2021, 12:00 PM CDT (17:00 UTC)
- Expired
- Apr 27, 2021, 12:22 PM CDT
- In force
- 22 min
- Issued by
- NWS Green Bay, WI
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
County Marinette County, WI
The radar
The Green Bay radar (KGRB), 93 km from the middle of the area, began a volume at 17:04 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 |
|---|---|---|---|
| Apr 27, 12:18 PM CDT | HAIL 0.5 | Crivitz, 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, 5.0 hours before the alert went out and 95 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
- 976 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
408
WUUS53 KGRB 271700
SVRGRB
WIC075-271745-
/O.NEW.KGRB.SV.W.0004.210427T1700Z-210427T1745Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
1200 PM CDT Tue Apr 27 2021
The National Weather Service in Green Bay has issued a
* Severe Thunderstorm Warning for...
Southern Marinette County in northeastern Wisconsin...
* Until 1245 PM CDT.
* At 1200 PM CDT, a severe thunderstorm was located near Crivitz, or
22 miles west of Menominee, moving northeast at 40 mph.
HAZARD...Half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Crivitz, Pound, Beaver, Middle Inlet, Mcallister, Loomis and Lake
Noquebay.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4530 8769 4521 8773 4519 8775 4508 8807
4526 8818 4540 8786 4536 8789 4535 8789
4535 8788 4537 8787 4534 8785 4535 8783
4535 8776 4539 8770 4538 8768 4534 8765
TIME...MOT...LOC 1700Z 246DEG 35KT 4520 8808
HAIL...1.25IN
WIND...<50MPH
$$
Eckberg2 follow-up statements
456
WWUS53 KGRB 271714
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
1214 PM CDT Tue Apr 27 2021
WIC075-271745-
/O.CON.KGRB.SV.W.0004.000000T0000Z-210427T1745Z/
Marinette WI-
1214 PM CDT Tue Apr 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CDT
FOR CENTRAL MARINETTE COUNTY...
At 1213 PM CDT, a severe thunderstorm was located near Crivitz, or 17
miles northwest of Menominee, moving northeast at 35 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Crivitz, Middle Inlet, Loomis, Lake Noquebay and Mcallister.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4530 8769 4521 8776 4517 8802 4524 8808
4536 8789 4535 8789 4535 8788 4537 8787
4534 8785 4535 8783 4535 8776 4539 8770
4538 8768 4534 8765
TIME...MOT...LOC 1713Z 238DEG 31KT 4525 8795
HAIL...1.00IN
WIND...<50MPH
$$
Eckberg891
WWUS53 KGRB 271722
SVSGRB
Severe Weather Statement
National Weather Service Green Bay WI
1222 PM CDT Tue Apr 27 2021
WIC075-271731-
/O.CAN.KGRB.SV.W.0004.000000T0000Z-210427T1745Z/
Marinette WI-
1222 PM CDT Tue Apr 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MARINETTE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled. However small hail up to
penny size and heavy rain are still possible with this thunderstorm.
Additional thunderstorms will move across central and southern
Marinette County through mid afternoon.
LAT...LON 4530 8769 4521 8776 4517 8802 4524 8808
4536 8789 4535 8789 4535 8788 4537 8787
4534 8785 4535 8783 4535 8776 4539 8770
4538 8768 4534 8765
TIME...MOT...LOC 1720Z 246DEG 35KT 4528 8785
$$
EckbergThe office that day
Everything else NWS Green Bay, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 5:10 AM CDT | Special Weather Statement | GRB | Langlade, Lincoln | 65 min |
| Apr 27, 5:33 AM CDT | Special Weather Statement | GRB | Forest, Langlade, Menominee | 42 min |
| Apr 27, 6:13 AM CDT | Special Weather Statement | GRB | Marinette, Menominee, Oconto | 47 min |
| Apr 27, 10:01 AM CDT | Special Weather Statement | GRB | Marinette | 44 min |
| Apr 27, 10:36 AM CDT | Special Weather Statement | GRB | Marinette | 54 min |
| Apr 27, 10:43 AM CDT | Severe Thunderstorm Warning | GRB | Marinette, Oconto | 47 min |
| Apr 27, 11:50 AM CDT | Areal Flood Advisory | GRB | Marinette, Menominee, Oconto | 3 hr |
| Apr 27, 12:20 PM CDT | Special Weather Statement | GRB | Menominee | 40 min |
| Apr 27, 1:41 PM CDT | Special Weather Statement | GRB | Door | 49 min |
| Apr 27, 6:16 PM CDT | Areal Flood Advisory | GRB | Langlade, Marinette, Menominee, Oconto | 3 hr |
| Apr 27, 6:41 PM CDT | Special Weather Statement | GRB | Langlade, Lincoln, Marathon, Wood | 64 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.