Alert archive / Wisconsin / Tornado Warnings in 2021

Tornado Warning 5, NWS Duluth, MN

September 20, 2021Bayfield County, Douglas County, Wisconsin

NWS Duluth, MN issued this tornado warning at Sep 20, 2021, 5:04 PM CDT for Bayfield County, Douglas County, Wisconsin. It was in force for 26 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, 5:04 PM CDT (22:04 UTC)
Expired: Sep 20, 2021, 5:30 PM CDT
In force: 26 min
Issued by: NWS Duluth, MN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Bayfield County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 70 km from the middle of the area, began a volume at 22:05 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, 5:17 PM CDT	TSTM WND DMG	12 W Drummond, WI	TREES AND POWER LINES DOWN IN BARNES. TIME ESTIMATED FROM RADAR.

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

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.1 hours before the alert went out and 232 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.

821 
WFUS53 KDLH 202204
TORDLH
WIC007-031-202230-
/O.NEW.KDLH.TO.W.0005.210920T2204Z-210920T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Duluth MN
504 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...
  East central Douglas County in northwestern Wisconsin...

* Until 530 PM CDT.
    
* At 504 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Solon Springs, or 26 miles north of Hayward,
  moving east at 25 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...
  Barnes.

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 4629 9170 4642 9176 4656 9141 4635 9131
TIME...MOT...LOC 2204Z 251DEG 20KT 4637 9168 

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

$$

Huyck

2 follow-up statements

688 
WWUS53 KDLH 202211
SVSDLH

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

WIC007-031-202230-
/O.CON.KDLH.TO.W.0005.000000T0000Z-210920T2230Z/
Bayfield WI-Douglas WI-
511 PM CDT Mon Sep 20 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
SOUTHWESTERN BAYFIELD AND EAST CENTRAL DOUGLAS COUNTIES...
    
At 510 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Barnes, or 27 miles north of Hayward, moving east at
25 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...
Iron River and Barnes. 

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 4630 9162 4645 9169 4656 9141 4635 9131
TIME...MOT...LOC 2210Z 248DEG 23KT 4640 9162 

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

$$

Huyck

175 
WWUS53 KDLH 202221
SVSDLH

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

WIC007-031-202230-
/O.CON.KDLH.TO.W.0005.000000T0000Z-210920T2230Z/
Bayfield WI-Douglas WI-
521 PM CDT Mon Sep 20 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
SOUTHWESTERN BAYFIELD AND EAST CENTRAL DOUGLAS COUNTIES...
    
At 520 PM CDT, severe thunderstorms capable of producing tornadoes
were located along a line extending from near Barnes, to 12 miles
east of Solon Springs, 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.

Locations impacted include...
Iron River and Barnes. 

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 4631 9157 4646 9166 4647 9165 4656 9141
      4635 9131
TIME...MOT...LOC 2220Z 245DEG 27KT 4640 9161 4632 9156 

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, 5:24 PM CDT	Tornado Warning	DLH	Bayfield	36 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.