Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 41, NWS Green Bay, WI

July 26, 2021Marinette County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 26, 2021, 3:45 PM CDT for Marinette County, Wisconsin. It was in force for 45 min. 4 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: Jul 26, 2021, 3:45 PM CDT (20:45 UTC)
Expired: Jul 26, 2021, 4:30 PM CDT
In force: 45 min
Issued by: NWS Green Bay, WI
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Marinette County, WI

The radar

The Green Bay radar (KGRB), 71 km from the middle of the area, began a volume at 20:46 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 26, 4:03 PM CDT	TSTM WND DMG	5 Wsw Peshtigo, WI	TRAINED SPOTTER REPORTED ROOF OFF OF A SILO. TIME ESTIMATED FROM RADAR. DELAYED REPORT.
Jul 26, 4:05 PM CDT	HAIL 1.25	Sw Peshtigo, WI	REPORT VIA SOCIAL MEDIA. TIME ESTIMATED BY RADAR.
Jul 26, 4:07 PM CDT	TSTM WND DMG	3 Sw Harmony, WI	LAW ENFORCEMENT REPORTED SEVERAL TREES DOWN AND BLOCKING THE ROAD ALONG HIGHWAY B. DELAYED REPORT.
Jul 26, 4:15 PM CDT	HAIL 0.88	Porterfield, WI	ON BORDERLINE ROAD IN PORTERFIELD. REPORT VIA SOCIAL MEDIA.

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, 8.8 hours before the alert went out and 73 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2259 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

017 
WUUS53 KGRB 262045
SVRGRB
WIC075-262130-
/O.NEW.KGRB.SV.W.0041.210726T2045Z-210726T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Green Bay WI
345 PM CDT Mon Jul 26 2021

The National Weather Service in Green Bay has issued a

* Severe Thunderstorm Warning for...
  Southern Marinette County in northeastern Wisconsin...

* Until 430 PM CDT.

* At 345 PM CDT, a severe thunderstorm was located 9 miles east of
  Crivitz, or 11 miles northwest of Menominee, moving east at 25 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...
  Marinette, Menominee, Crivitz, Pound, Peshtigo, Porterfield,
  Beaver, Middle Inlet, Coleman and Harmony.

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.

&&

LAT...LON 4494 8760 4493 8768 4495 8777 4499 8776
      4499 8794 4502 8795 4503 8810 4532 8802
      4529 8769 4520 8774 4517 8774 4514 8768
      4511 8766 4510 8759 4512 8761 4514 8761
      4512 8755
TIME...MOT...LOC 2045Z 279DEG 22KT 4521 8782 

HAIL...1.00IN
WIND...60MPH
 
$$

Skowronski

1 follow-up statement

541 
WWUS53 KGRB 262101
SVSGRB

Severe Weather Statement
National Weather Service Green Bay WI
401 PM CDT Mon Jul 26 2021

WIC075-262130-
/O.CON.KGRB.SV.W.0041.000000T0000Z-210726T2130Z/
Marinette WI-
401 PM CDT Mon Jul 26 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHERN MARINETTE COUNTY...

At 401 PM CDT, a severe thunderstorm was located 9 miles west of
Marinette, moving east at 25 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...
Marinette, Menominee, Peshtigo, Porterfield, Harmony and County Line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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 4494 8760 4493 8769 4495 8777 4499 8776
      4499 8794 4502 8795 4502 8799 4515 8796
      4518 8786 4529 8780 4529 8769 4520 8774
      4517 8774 4514 8768 4511 8766 4510 8759
      4514 8761 4512 8755
TIME...MOT...LOC 2101Z 284DEG 22KT 4512 8782 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Skowronski

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 26, 2:39 PM CDT	Special Weather Statement	GRB	Portage	36 min
Jul 26, 2:49 PM CDT	Special Weather Statement	GRB	Marinette	26 min
Jul 26, 3:08 PM CDT	Special Weather Statement	GRB	Waupaca	37 min
Jul 26, 3:21 PM CDT	Special Weather Statement	GRB	Marinette	24 min
Jul 26, 3:28 PM CDT	Special Weather Statement	GRB	Brown	32 min
Jul 26, 3:42 PM CDT	Special Weather Statement	GRB	Outagamie	33 min
Jul 26, 3:46 PM CDT	Special Marine Warning	GRB		59 min
Jul 26, 4:01 PM CDT	Special Weather Statement	GRB	Brown	44 min
Jul 26, 4:08 PM CDT	Severe Thunderstorm Warning	GRB	Marinette, Oconto	36 min
Jul 26, 4:10 PM CDT	Special Marine Warning	GRB		65 min
Jul 26, 4:19 PM CDT	Special Weather Statement	GRB	Brown	41 min
Jul 26, 4:32 PM CDT	Severe Thunderstorm Warning	GRB	Door	43 min
Jul 26, 4:34 PM CDT	Special Weather Statement	GRB	Kewaunee	56 min
Jul 26, 4:54 PM CDT	Special Marine Warning	GRB		2 hr
Jul 26, 4:58 PM CDT	Severe Thunderstorm Warning	GRB	Kewaunee	32 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2021 Every 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.