Alert archive / Minnesota / Storm Warnings in 2021

Storm Warning 2, NWS Duluth, MN

December 6, 2021

NWS Duluth, MN issued this storm warning at Dec 6, 2021, 1:06 AM CST. It took effect at Dec 6, 2021, 4:00 AM CST. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 6, 2021, 1:06 AM CST (07:06 UTC)
In effect from: Dec 6, 2021, 4:00 AM CST
Expired: Dec 6, 2021, 2:00 PM CST
In force: 10 hr
Issued by: NWS Duluth, MN

The text

As transmitted.

443 
WHUS73 KDLH 060706
MWWDLH

URGENT - MARINE WEATHER MESSAGE
National Weather Service Duluth MN
106 AM CST Mon Dec 6 2021

LSZ140>145-061915-
/O.EXT.KDLH.GL.W.0017.000000T0000Z-211206T1000Z/
/O.NEW.KDLH.SR.W.0002.211206T1000Z-211206T2000Z/
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-
106 AM CST Mon Dec 6 2021

...GALE WARNING NOW IN EFFECT UNTIL 4 AM CST EARLY THIS MORNING...
...STORM WARNING IN EFFECT UNTIL 2 PM CST THIS AFTERNOON...

* WHAT...For the Storm Warning, northwest winds 20 to 30 kt with
  gusts up to 55 kt and waves 6 to 10 ft expected. For the Gale 
  Warning, north winds 20 to 30 kt with gusts up to 45 kt and 
  waves 4 to 7 ft.

* WHERE...Portions of Lake Superior. 

* WHEN...For the Storm Warning, until 2 PM CST this afternoon. 
  For the Gale Warning, until 4 AM CST early this morning.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LSZ121-146>148-150-061915-
/O.CON.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
Chequamegon Bay-Bayfield to Oak Point WI-
Port Wing to Sand Island WI-Sand Island to Bayfield WI-
Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
106 AM CST Mon Dec 6 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 4 PM CST THIS AFTERNOON...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 40 kt and 
  waves 7 to 12 ft.

* WHERE...Port Wing to Sand Island WI, Sand Island to Bayfield 
  WI, Oak Point to Saxon Harbor WI, Chequamegon Bay-Bayfield to 
  Oak Point WI and Outer Apostle Islands Beyond 5 NM from 
  Mainland.

* WHEN...Until 4 PM CST this afternoon.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

4 follow-up statements

965 
WHUS73 KDLH 060839
MWWDLH

URGENT - MARINE WEATHER MESSAGE
National Weather Service Duluth MN
239 AM CST Mon Dec 6 2021

LSZ140>142-062000-
/O.CON.KDLH.GL.W.0017.000000T0000Z-211206T1000Z/
/O.CON.KDLH.SR.W.0002.211206T1000Z-211206T2000Z/
/O.NEW.KDLH.UP.W.0001.211206T1300Z-211206T2000Z/
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
239 AM CST Mon Dec 6 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CST EARLY THIS
MORNING...
...STORM WARNING REMAINS IN EFFECT UNTIL 2 PM CST THIS
AFTERNOON...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 AM THIS MORNING
TO 2 PM CST THIS AFTERNOON...

* WHAT...For the Heavy Freezing Spray Warning, heavy freezing
  spray at a rate of 2 cm per hour or greater expected, and may
  rapidly accumulate on vessels. For the Gale Warning, north winds
  20 to 30 kt with gusts up to 40 kt and waves 4 to 7 ft. For the
  Storm Warning, northwest winds 25 to 35 kt with gusts up to 55
  kt and waves 6 to 10 ft expected.

* WHERE...Grand Portage to Grand Marais MN, Grand Marais to 
  Taconite Harbor MN and Taconite Harbor to Silver Bay Harbor MN.

* WHEN...For the Heavy Freezing Spray Warning, from 7 AM this 
  morning to 2 PM CST this afternoon. For the Gale Warning, 
  until 4 AM CST early this morning. For the Storm Warning, 
  until 2 PM CST this afternoon.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Very strong winds will cause hazardous waves which 
  could capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LSZ143>145-062000-
/O.CON.KDLH.GL.W.0017.000000T0000Z-211206T1000Z/
/O.CON.KDLH.SR.W.0002.211206T1000Z-211206T2000Z/
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-
239 AM CST Mon Dec 6 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 4 AM CST EARLY THIS
MORNING...
...STORM WARNING REMAINS IN EFFECT UNTIL 2 PM CST THIS
AFTERNOON...

* WHAT...For the Gale Warning, northwest winds 25 to 30 kt with
  gusts up to 45 kt and waves 3 to 6 ft. For the Storm Warning,
  northwest winds 20 to 30 kt with gusts up to 50 kt and waves 6
  to 10 ft expected.

* WHERE...Two Harbors to Duluth MN, Duluth MN to Port Wing WI 
  and Silver Bay Harbor to Two Harbors MN.

* WHEN...For the Gale Warning, until 4 AM CST early this 
  morning. For the Storm Warning, until 2 PM CST this afternoon.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LSZ121-146>148-150-062045-
/O.CON.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
Chequamegon Bay-Bayfield to Oak Point WI-
Port Wing to Sand Island WI-Sand Island to Bayfield WI-
Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
239 AM CST Mon Dec 6 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 4 PM CST THIS AFTERNOON...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 40 kt and 
  waves 7 to 10 ft.

* WHERE...Port Wing to Sand Island WI, Sand Island to Bayfield 
  WI, Oak Point to Saxon Harbor WI, Chequamegon Bay-Bayfield to 
  Oak Point WI and Outer Apostle Islands Beyond 5 NM from 
  Mainland.

* WHEN...Until 4 PM CST this afternoon.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

049 
WHUS73 KDLH 061607
MWWDLH

URGENT - MARINE WEATHER MESSAGE
National Weather Service Duluth MN
1007 AM CST Mon Dec 6 2021

LSZ121-146>148-150-062200-
/O.CON.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
Chequamegon Bay-Bayfield to Oak Point WI-
Port Wing to Sand Island WI-Sand Island to Bayfield WI-
Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
1007 AM CST Mon Dec 6 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 4 PM CST THIS AFTERNOON...

* WHAT...Northwest winds 25 to 35 kt and waves 6 to 9 ft.

* WHERE...Port Wing to Sand Island WI, Sand Island to Bayfield 
  WI, Oak Point to Saxon Harbor WI, Chequamegon Bay-Bayfield to 
  Oak Point WI and Outer Apostle Islands Beyond 5 NM from 
  Mainland.

* WHEN...Until 4 PM CST this afternoon.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LSZ140>142-062000-
/O.CON.KDLH.SR.W.0002.000000T0000Z-211206T2000Z/
/O.CON.KDLH.UP.W.0001.000000T0000Z-211206T2000Z/
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
1007 AM CST Mon Dec 6 2021

...STORM WARNING REMAINS IN EFFECT UNTIL 2 PM CST THIS
AFTERNOON...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 2 PM CST
THIS AFTERNOON...

* WHAT...For the Heavy Freezing Spray Warning, heavy freezing 
  spray at a rate of 2 cm per hour or greater may rapidly 
  accumulate on vessels. For the Storm Warning, northwest winds 
  20 to 30 kt with gusts up to 50 kt and waves 2 to 5 ft.

* WHERE...Taconite Harbor to Silver Bay Harbor MN, Grand Portage 
  to Grand Marais MN and Grand Marais to Taconite Harbor MN.

* WHEN...Until 2 PM CST this afternoon.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Very strong winds will cause hazardous waves which 
  could capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LSZ143>145-062000-
/O.CON.KDLH.SR.W.0002.000000T0000Z-211206T2000Z/
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-
1007 AM CST Mon Dec 6 2021

...STORM WARNING REMAINS IN EFFECT UNTIL 2 PM CST THIS
AFTERNOON...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 48 kt and 
  waves 2 to 5 ft.

* WHERE...Two Harbors to Duluth MN, Duluth MN to Port Wing WI 
  and Silver Bay Harbor to Two Harbors MN.

* WHEN...Until 2 PM CST this afternoon.

* IMPACTS...Very strong winds will cause hazardous waves which 
  could capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

804 
WHUS73 KDLH 061838
MWWDLH

URGENT - MARINE WEATHER MESSAGE
National Weather Service Duluth MN
1238 PM CST Mon Dec 6 2021

LSZ142-070000-
/O.CAN.KDLH.SR.W.0002.000000T0000Z-211206T2000Z/
/O.NEW.KDLH.SC.Y.0106.211206T1838Z-211207T0000Z/
/O.CAN.KDLH.UP.W.0001.000000T0000Z-211206T2000Z/
Taconite Harbor to Silver Bay Harbor MN-
1238 PM CST Mon Dec 6 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING...
...STORM WARNING IS CANCELLED...
...HEAVY FREEZING SPRAY WARNING IS CANCELLED...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 50 kt and 
  waves 2 to 5 ft.

* WHERE...Taconite Harbor to Silver Bay Harbor MN.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.

&&

$$

LSZ143>145-070000-
/O.CAN.KDLH.SR.W.0002.000000T0000Z-211206T2000Z/
/O.NEW.KDLH.SC.Y.0106.211206T1838Z-211207T0000Z/
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-
1238 PM CST Mon Dec 6 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM CST THIS EVENING...
...STORM WARNING IS CANCELLED...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 50 kt and 
  waves 2 to 4 ft.

* WHERE...Silver Bay Harbor to Two Harbors MN, Two Harbors to 
  Duluth MN and Duluth MN to Port Wing WI.

* WHEN...Until 6 PM CST this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.

&&

$$

LSZ121-146>148-150-062200-
/O.CON.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
Chequamegon Bay-Bayfield to Oak Point WI-
Port Wing to Sand Island WI-Sand Island to Bayfield WI-
Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
1238 PM CST Mon Dec 6 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 4 PM CST THIS AFTERNOON...

* WHAT...Northwest winds 20 to 30 kt and waves 4 to 7 ft.

* WHERE...Port Wing to Sand Island WI, Sand Island to Bayfield 
  WI, Oak Point to Saxon Harbor WI, Chequamegon Bay-Bayfield to 
  Oak Point WI and Outer Apostle Islands Beyond 5 NM from 
  Mainland.

* WHEN...Until 4 PM CST this afternoon.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

LSZ140-141-062000-
/O.CON.KDLH.SR.W.0002.000000T0000Z-211206T2000Z/
/O.CON.KDLH.UP.W.0001.000000T0000Z-211206T2000Z/
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
1238 PM CST Mon Dec 6 2021

...STORM WARNING REMAINS IN EFFECT UNTIL 2 PM CST THIS
AFTERNOON...
...HEAVY FREEZING SPRAY WARNING REMAINS IN EFFECT UNTIL 2 PM CST
THIS AFTERNOON...

* WHAT...For the Heavy Freezing Spray Warning, heavy freezing 
  spray at a rate of 2 cm per hour or greater may rapidly 
  accumulate on vessels. For the Storm Warning, northwest winds 
  25 to 30 kt with gusts up to 50 kt and waves 2 to 5 ft.

* WHERE...Grand Portage to Grand Marais MN and Grand Marais to 
  Taconite Harbor MN.

* WHEN...Until 2 PM CST this afternoon.

* IMPACTS...Operating a vessel in heavy freezing spray is 
  hazardous. Freezing spray may render mechanical and electronic 
  components inoperative. Rapid ice accretion on decks and 
  superstructures may result in a catastrophic loss of 
  stability. Very strong winds will cause hazardous waves which 
  could capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should prepare for dangerous accumulation of ice on
their vessel. If possible, remain in port, avoid the warning area
or conduct mitigation.

Mariners should remain in port, alter course, and/or secure the
vessel for severe conditions.

&&

$$

466 
WHUS73 KDLH 062005
MWWDLH

URGENT - MARINE WEATHER MESSAGE
National Weather Service Duluth MN
205 PM CST Mon Dec 6 2021

LSZ146-148-070100-
/O.CAN.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
/O.EXB.KDLH.SC.Y.0106.000000T0000Z-211207T0100Z/
Port Wing to Sand Island WI-Oak Point to Saxon Harbor WI-
205 PM CST Mon Dec 6 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CST THIS EVENING...
...GALE WARNING IS CANCELLED...

* WHAT...Northwest winds 20 to 25 kt with gusts up to 30 kt and 
  waves 3 to 6 ft.

* WHERE...Port Wing to Sand Island WI and Oak Point to Saxon 
  Harbor WI.

* WHEN...Until 7 PM CST this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.

&&

$$

LSZ150-070815-
/O.CAN.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
/O.EXB.KDLH.SC.Y.0106.000000T0000Z-211207T1500Z/
Outer Apostle Islands Beyond 5 NM from Mainland-
205 PM CST Mon Dec 6 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM CST TUESDAY...
...GALE WARNING IS CANCELLED...

* WHAT...West winds 15 to 25 kt with gusts up to 30 kt and waves 
  4 to 7 ft.

* WHERE...Outer Apostle Islands Beyond 5 NM from Mainland.

* WHEN...Until 9 AM CST Tuesday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.

&&

$$

LSZ121-147-062115-
/O.CAN.KDLH.GL.W.0017.000000T0000Z-211206T2200Z/
Chequamegon Bay-Bayfield to Oak Point WI-
Sand Island to Bayfield WI-
205 PM CST Mon Dec 6 2021

...GALE WARNING IS CANCELLED...

$$

LSZ140-141-070100-
/O.EXP.KDLH.SR.W.0002.000000T0000Z-211206T2000Z/
/O.EXP.KDLH.UP.W.0001.000000T0000Z-211206T2000Z/
/O.EXB.KDLH.SC.Y.0106.000000T0000Z-211207T0100Z/
Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
205 PM CST Mon Dec 6 2021

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM CST THIS EVENING...
...STORM WARNING HAS EXPIRED...
...HEAVY FREEZING SPRAY WARNING HAS EXPIRED...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 45 kt and 
  waves 1 to 4 ft.

* WHERE...Grand Portage to Grand Marais MN and Grand Marais to 
  Taconite Harbor MN.

* WHEN...Until 7 PM CST this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.

&&

$$

LSZ142>145-070100-
/O.EXT.KDLH.SC.Y.0106.000000T0000Z-211207T0100Z/
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-
205 PM CST Mon Dec 6 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CST THIS
EVENING...

* WHAT...Northwest winds 15 to 20 kt with gusts up to 40 kt and 
  waves 1 to 4 ft.

* WHERE...Two Harbors to Duluth MN, Duluth MN to Port Wing WI, 
  Taconite Harbor to Silver Bay Harbor MN and Silver Bay Harbor 
  to Two Harbors MN.

* WHEN...Until 7 PM CST this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Anyone operating a smaller vessel should avoid navigating in
hazardous conditions.

&&

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 5, 7:11 PM CST	Gale Warning	DLH		19 hr
Dec 5, 7:11 PM CST	Small Craft Advisory	DLH		3 hr
Dec 6, 12:21 AM CST	Winter Weather Advisory	DLH	Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 4 more	16 hr
Dec 6, 2:39 AM CST	Heavy Freezing Spray Warning	DLH		11 hr
Dec 6, 12:38 PM CST	Small Craft Advisory	DLH		4 hr
Dec 6, 4:07 PM CST	Wind Chill Advisory	DLH	Carlton, Cook, Lake, Saint Louis	16 hr
Dec 6, 4:13 PM CST	Small Craft Advisory	DLH		18 hr

Nearby

Storm Warnings in Minnesota, 2021 Every storm 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.