Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 6, NWS Duluth, MN

September 20, 2021Bayfield County, Wisconsin

NWS Duluth, MN issued this tornado warning at Sep 20, 2021, 5:24 PM CDT for Bayfield County, Wisconsin. It was in force for 36 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: Sep 20, 2021, 5:24 PM CDT (22:24 UTC)
Expired: Sep 20, 2021, 6:00 PM CDT
In force: 36 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Bayfield County, WI

The radar

The Duluth radar (KDLH), 76 km from the middle of the area, began a volume at 22:27 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
Sep 20, 5:39 PM CDT	TSTM WND DMG	Ino, WI	LAW ENFORCEMENT REPORTS MULTIPLE TREES DOWN ALONG HIGHWAY 2 IN INO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 20, 5:14 PM CDT	Tornado Watch	SPC	3 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.4 hours before the alert went out and 249 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: 148 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1002 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

730 
WFUS53 KDLH 202224
TORDLH
WIC007-202300-
/O.NEW.KDLH.TO.W.0006.210920T2224Z-210920T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Duluth MN
524 PM CDT Mon Sep 20 2021

The National Weather Service in Duluth MN has issued a

* Tornado Warning for...
  Southwestern Bayfield County in northwestern Wisconsin...

* Until 600 PM CDT.
    
* At 524 PM CDT, severe thunderstorms capable of producing a tornado
  were located along a line extending from near Barnes, to 8 miles
  west of Drummond, moving northeast at 30 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur. Tree 
           damage is likely.

* These dangerous storms will be near...
  Iron River around 535 PM CDT.

Other locations in the path of these tornadic storms include Ino and
Benoit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4644 9155 4648 9155 4666 9119 4642 9098
      4633 9146
TIME...MOT...LOC 2224Z 244DEG 27KT 4644 9149 4638 9143 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Huyck

2 follow-up statements

851 
WWUS53 KDLH 202233
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
533 PM CDT Mon Sep 20 2021

WIC007-202300-
/O.CON.KDLH.TO.W.0006.000000T0000Z-210920T2300Z/
Bayfield WI-
533 PM CDT Mon Sep 20 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR CENTRAL
BAYFIELD COUNTY...
    
At 533 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Iron River, or 33 miles north of
Hayward, moving northeast at 45 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur. Tree damage is 
         likely.

Locations impacted include...
  Ino and Benoit.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4637 9131 4652 9142 4666 9119 4642 9098
      4638 9120
TIME...MOT...LOC 2233Z 224DEG 40KT 4648 9132 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Huyck

439 
WWUS53 KDLH 202242
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
542 PM CDT Mon Sep 20 2021

WIC007-202300-
/O.CON.KDLH.TO.W.0006.000000T0000Z-210920T2300Z/
Bayfield WI-
542 PM CDT Mon Sep 20 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR CENTRAL
BAYFIELD COUNTY...
    
At 542 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Ino, or 37 miles north of Hayward, moving northeast
at 50 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur. Tree damage is 
         likely.

Locations impacted include...
Benoit, Ino, and Mason. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4638 9124 4655 9137 4666 9120 4666 9119
      4642 9098 4638 9120
TIME...MOT...LOC 2242Z 239DEG 42KT 4653 9123 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Huyck

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 20, 4:51 PM CDT	Special Weather Statement	DLH	Washburn	24 min
Sep 20, 4:59 PM CDT	Tornado Warning	DLH	Bayfield, Douglas, Sawyer, Washburn	31 min
Sep 20, 5:04 PM CDT	Tornado Warning	DLH	Bayfield, Douglas	26 min
Sep 20, 5:29 PM CDT	Tornado Warning	DLH	Bayfield	31 min
Sep 20, 5:49 PM CDT	Areal Flood Warning	DLH	Bayfield, Douglas	3 hr
Sep 20, 5:52 PM CDT	Tornado Warning	DLH	Ashland, Bayfield	23 min
Sep 20, 5:57 PM CDT	Severe Thunderstorm Warning	DLH	Ashland, Bayfield, Iron, Sawyer	63 min
Sep 20, 6:31 PM CDT	Special Weather Statement	DLH	Sawyer	29 min

Nearby

Tornado Warnings in Wisconsin, 2021 Every tornado warning in 2021 Tornadoes 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.