Small Craft Advisory 5, NWS Chicago, IL

258 
WHUS73 KLOT 210112
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
712 PM CST Wed Jan 20 2021

LMZ744-745-210600-
/O.EXT.KLOT.GL.W.0001.000000T0000Z-210121T0600Z/
/O.EXT.KLOT.SC.Y.0005.210121T0600Z-210122T1500Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
712 PM CST Wed Jan 20 2021

...GALE WARNING NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
...SMALL CRAFT ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
9 AM CST FRIDAY...

* WHAT...For the Gale Warning, south gales to 35 kt, significant 
  waves to 6 ft, and occasional waves to 8 ft expected. For the 
  Small Craft Advisory, winds to 25 to 30 kt expected, direction 
  southwest tonight, west on Thursday, and northwest on Thursday 
  evening through Friday morning, significant waves to 7 ft, and 
  occasional waves to 9 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...For the Gale Warning, until midnight CST tonight. For 
  the Small Craft Advisory, from midnight tonight to 9 AM CST 
  Friday.

* 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.

&&

$$

LMZ740>743-210600-
/O.CON.KLOT.GL.W.0001.000000T0000Z-210121T0400Z/
/O.CON.KLOT.SC.Y.0005.210121T0400Z-210122T0600Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
712 PM CST Wed Jan 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM CST THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
THURSDAY NIGHT...

* WHAT...For the Gale Warning, south gales to 35 to 40 kt, 
  significant waves to 6 ft, and occasional waves to 8 ft 
  expected. For the Small Craft Advisory, winds to 25 to 30 kt, 
  direction southwest tonight, west on Thursday, and northwest 
  on Thursday evening.

* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...For the Gale Warning, until 10 PM CST this evening. For 
  the Small Craft Advisory, from 10 PM this evening to midnight 
  CST Thursday night.

* 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.

&&

$$

664 
WHUS73 KLOT 210401
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
1001 PM CST Wed Jan 20 2021

LMZ740>743-211215-
/O.EXP.KLOT.GL.W.0001.000000T0000Z-210121T0400Z/
/O.UPG.KLOT.SC.Y.0005.000000T0000Z-210122T0600Z/
/O.NEW.KLOT.GL.W.0002.210121T0401Z-210121T0600Z/
/O.NEW.KLOT.SC.Y.0006.210121T0600Z-210122T0600Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
1001 PM CST Wed Jan 20 2021

...GALE WARNING NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT CST THURSDAY
NIGHT...


* WHAT...For the Gale Warning, southwest gales to 35 kt,
  significant waves to 6 ft, and occasional waves to 8 ft
  expected. For the Small Craft Advisory, winds to 25 to 30 kt
  expected, direction southwest tonight, west on Thursday, and
  northwest on Thursday evening through Friday morning,
  significant waves to 5 ft.

* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...For the Gale Warning, until midnight CST tonight. For 
  the Small Craft Advisory, until midnight CST Thursday night.

* 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.

&&

$$

LMZ744-745-211215-
/O.CON.KLOT.GL.W.0001.000000T0000Z-210121T0600Z/
/O.CON.KLOT.SC.Y.0005.210121T0600Z-210122T1500Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
1001 PM CST Wed Jan 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY...

* WHAT...For the Gale Warning, south gales to 35 kt, significant 
  waves to 6 ft, and occasional waves to 8 ft expected. For the 
  Small Craft Advisory, winds to 25 to 30 kt expected, direction 
  southwest tonight, west on Thursday, and northwest on Thursday 
  evening through Friday morning, significant waves to 7 ft, and 
  occasional waves to 9 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...For the Gale Warning, until midnight CST tonight. For 
  the Small Craft Advisory, from midnight tonight to 9 AM CST 
  Friday.

* 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.

&&

$$

708 
WHUS73 KLOT 210407 CCA
MWWLOT

URGENT - MARINE WEATHER MESSAGE...CORRECTED
National Weather Service Chicago IL
1007 PM CST Wed Jan 20 2021

LMZ740>743-211215-
/O.EXP.KLOT.GL.W.0001.000000T0000Z-210121T0400Z/
/O.UPG.KLOT.SC.Y.0005.000000T0000Z-210122T0600Z/
/O.COR.KLOT.GL.W.0002.210121T0407Z-210121T0600Z/
/O.COR.KLOT.SC.Y.0006.210121T0600Z-210122T0600Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
1007 PM CST Wed Jan 20 2021

...GALE WARNING NOW IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
...SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT CST THURSDAY
NIGHT...


* WHAT...For the Gale Warning, southwest gales to 35 kt,
  significant waves to 6 ft, and occasional waves to 8 ft
  expected. For the Small Craft Advisory, winds to 25 to 30 kt
  expected, direction southwest tonight, west on Thursday, and
  northwest on Thursday evening through Friday morning,
  significant waves to 4 to 5 ft.

* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...For the Gale Warning, until midnight CST tonight. For 
  the Small Craft Advisory, until midnight CST Thursday night.

* 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.

&&

$$

LMZ744-745-211215-
/O.COR.KLOT.GL.W.0001.000000T0000Z-210121T0600Z/
/O.COR.KLOT.SC.Y.0005.210121T0600Z-210122T1500Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
1007 PM CST Wed Jan 20 2021

...GALE WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY...

* WHAT...For the Gale Warning, southwest gales to 35 kt, 
  significant waves to 6 ft, and occasional waves to 8 ft 
  expected. For the Small Craft Advisory, winds to 25 to 30 kt 
  expected, direction southwest tonight, west on Thursday, and 
  northwest on Thursday evening through Friday morning, 
  significant waves to 7 ft, and occasional waves to 9 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...For the Gale Warning, until midnight CST tonight. For 
  the Small Craft Advisory, from midnight tonight to 9 AM CST 
  Friday.

* 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.

&&

$$

RC

411 
WHUS73 KLOT 210642
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
1242 AM CST Thu Jan 21 2021

LMZ744-745-211445-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210122T1500Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
1242 AM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY...

* WHAT...Winds to 25 to 30 kt expected, direction southwest 
  tonight, west on Thursday, and northwest on Thursday evening 
  through Friday morning, significant waves to 7 ft, and 
  occasional waves to 9 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 9 AM CST Friday.

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

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.

&&

$$

LMZ740>743-211445-
/O.CON.KLOT.SC.Y.0006.000000T0000Z-210122T0600Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
1242 AM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT CST
TONIGHT...

* WHAT...Winds to 25 to 30 kt expected, direction southwest 
  tonight, west on Thursday, and northwest on Thursday evening 
  through Friday morning, significant waves to 4 to 5 ft.

* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...Until midnight CST Thursday night.

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

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.

&&

$$

948 
WHUS73 KLOT 210931
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
331 AM CST Thu Jan 21 2021

LMZ744-745-211745-
/O.EXT.KLOT.SC.Y.0005.000000T0000Z-210123T0300Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
331 AM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 PM CST FRIDAY...

* WHAT...Winds to 25 to 30 kt expected, with significant waves to
  8 ft, and occasional waves to 10 ft. Wind direction west on 
  Thursday, and northwest on Thursday evening through Friday 
  morning. 

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 9 PM CST Friday.

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

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.

&&

$$

LMZ740>743-211745-
/O.EXT.KLOT.SC.Y.0006.000000T0000Z-210122T0900Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
331 AM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM CST FRIDAY...

* WHAT...Winds to 25 to 30 kt and significant waves to 4 to 5 ft.
  expected. Wind direction west on Thursday, and northwest 
  Thursday evening through Friday morning.
 
* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...Until 3 AM CST Friday.

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

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.

&&

$$

415 
WHUS73 KLOT 211543
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
943 AM CST Thu Jan 21 2021

LMZ744-745-212345-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210123T0300Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
943 AM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CST FRIDAY...

* WHAT...Winds to 25 to 30 kt expected, with significant waves to
  8 ft, and occasional waves to 10 ft. Wind direction west today,
  and northwest this evening through Friday morning.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 9 PM CST Friday.

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

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.

&&

$$

LMZ740>743-212345-
/O.CON.KLOT.SC.Y.0006.000000T0000Z-210122T0900Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
943 AM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY...

* WHAT...Winds to 25 to 30 kt and significant waves to 4 to 5 ft.
  expected. Wind direction west today, and northwest this evening
  through Friday morning.

* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...Until 3 AM CST Friday.

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

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.

&&

$$

645 
WHUS73 KLOT 212121
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
321 PM CST Thu Jan 21 2021

LMZ744-745-220530-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210123T0300Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
321 PM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CST FRIDAY...

* WHAT...West to northwest winds to 30 kt. Occasional gale force
  gusts to 35 kt through early this evening. Significant waves to
  8 ft with occasional waves to 10 ft. 

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 9 PM CST Friday.

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

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.

&&

$$

LMZ740>743-220530-
/O.CON.KLOT.SC.Y.0006.000000T0000Z-210122T0900Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
321 PM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY...

* WHAT...West to northwest winds to 30 kt. Occasional gale force
  gusts to 35 kt through early this evening. Significant waves to
  6 ft with occasional waves to 8 ft. 

* WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor 
  to Northerly Island IL, Northerly Island to Calumet Harbor IL 
  and Calumet Harbor IL to Gary IN.

* WHEN...Until 3 AM CST Friday.

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

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.

&&

$$

753 
WHUS73 KLOT 220317
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
917 PM CST Thu Jan 21 2021

LMZ744-745-221130-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210123T0300Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
917 PM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CST FRIDAY...

* WHAT...Northwest winds to 30 kt. Significant waves to 8 ft.
  Occasional waves to 10 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 9 PM CST Friday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LMZ740>743-220900-
/O.CON.KLOT.SC.Y.0006.000000T0000Z-210122T0900Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-
917 PM CST Thu Jan 21 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST FRIDAY...

* WHAT...Northwest winds to 30 kt. Waves to 5 ft.

* WHERE...Northerly Island to Calumet Harbor IL, Calumet Harbor 
  IL to Gary IN, Winthrop Harbor to Wilmette Harbor IL and 
  Wilmette Harbor to Northerly Island IL.

* WHEN...Until 3 AM CST Friday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

155 
WHUS73 KLOT 220856
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
256 AM CST Fri Jan 22 2021

LMZ740>742-221000-
/O.CAN.KLOT.SC.Y.0006.000000T0000Z-210122T0900Z/
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
256 AM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY IS CANCELLED...

Waves and winds have decreased early this morning.

$$

LMZ744-745-221700-
/O.EXT.KLOT.SC.Y.0005.000000T0000Z-210123T0900Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
256 AM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 AM CST SATURDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 25 kt and
  waves 4 to 7 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 3 AM CST Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LMZ743-221500-
/O.EXT.KLOT.SC.Y.0006.000000T0000Z-210122T1500Z/
Calumet Harbor IL to Gary IN-
256 AM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 9 AM CST THIS
MORNING...

* WHAT...Waves 3 to 6 ft.

* WHERE...Calumet Harbor IL to Gary IN.

* WHEN...Until 9 AM CST this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

535 
WHUS73 KLOT 221529
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
929 AM CST Fri Jan 22 2021

LMZ743-221630-
/O.EXP.KLOT.SC.Y.0006.000000T0000Z-210122T1500Z/
Calumet Harbor IL to Gary IN-
929 AM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY HAS EXPIRED...

Waves are gradually subsiding, thus the advisory has been allowed
to expire. 

$$

LMZ744-745-222330-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210123T0900Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
929 AM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST
SATURDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 25 kt and
  waves 5 to 8 ft occasionally 10 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 3 AM CST Saturday.

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

* ADDITIONAL DETAILS...Freezing spray is also expected. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

381 
WHUS73 KLOT 222051
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
251 PM CST Fri Jan 22 2021

LMZ744-745-230500-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210123T0900Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
251 PM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST
SATURDAY...

* WHAT...Northwest winds to 20 kt and waves to 6 ft occasionally 8 
  ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 3 AM CST Saturday.

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

* ADDITIONAL DETAILS...Freezing spray is also expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

168 
WHUS73 KLOT 230309
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
909 PM CST Fri Jan 22 2021

LMZ744-745-230900-
/O.CON.KLOT.SC.Y.0005.000000T0000Z-210123T0900Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
909 PM CST Fri Jan 22 2021

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 AM CST
SATURDAY...

* WHAT...Northwest winds to 20 kt. Significant waves to 6 ft.
  Occasional waves to 8 ft.

* WHERE...Gary to Burns Harbor IN and Burns Harbor to Michigan 
  City IN.

* WHEN...Until 3 AM CST Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

835 
WHUS73 KLOT 230913
MWWLOT

URGENT - MARINE WEATHER MESSAGE
National Weather Service Chicago IL
313 AM CST Sat Jan 23 2021

LMZ744-745-231015-
/O.EXP.KLOT.SC.Y.0005.000000T0000Z-210123T0900Z/
Gary to Burns Harbor IN-Burns Harbor to Michigan City IN-
313 AM CST Sat Jan 23 2021

...SMALL CRAFT ADVISORY HAS EXPIRED...

Waves have subsided to under 4 feet early this morning.

$$

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
240 PM CST Wed Jan 20 2021

.SHORT TERM...
238 PM CST

Through Thursday night...

A potent sub 985mb surface low currently shifting eastward into
western Ontario is inducing some strong pressure falls (12-16
mb/6hr) over the Upper Midwest and into the western Great Lakes
this afternoon. Winds in this regime will continue to become
increasingly gusty out of the south-southwest through the
afternoon and early even over our area. It appears our peak gusts,
possibly just in excess of 35 mph, look to be early this evening,
and will likely be tied to the period of best pressure falls
sweeping into the western Great Lakes. The winds will then shift
westerly and ease overnight.

After a cold start to the day, temperatures across the area
continue to warm through the 20s under most sunny skies. In spite
of this, the winds are creating wind chills in the teens.
Temperatures will likely reach their daily peak in the lower 30s
this evening as warm air advection continues. We should then see
temperatures drop back into the mid to upper 20s overnight as the
winds ease and veer westerly.

Tomorrow looks to be another mainly sunny day across the area, and
temperatures should be a few degrees warmer than todays readings
(into the mid to upper 30s). Winds do look to become a bit breezy
(25 to 30 mph) again during the day, though this time from a
westerly direction. A cold front will shift southward across the
area Thursday evening, and this will result in a wind shift to the
northwest. Overall, it looks like this front will go through
precipitation free. However, I can't rule out a period of flurries
over light snow. For this reason, I added in some change for some
flurries during the evening. Otherwise, expect much colder
temperatures Thursday night, with lows bottoming out in the teens
and wind chills falling near zero towards early Friday morning.

KJB

&&

.LONG TERM...
238 PM CST

Friday through Wednesday...

As a cold front moves east of our area and high pressure moving in
from the west, northwesterly winds will bring in slightly cooler
air, but much colder air will move in overnight Thursday, with 925
mb temperatures dropping 12 to 16 degrees by Friday morning vs.
Thursday morning. Cold-air advection (CAA) will continue throughout
Friday and Friday night, and combined with snow cover and lack of
clouds, will lead to  single digit lows Saturday morning, especially
for sites in our northwestern counties. High pressure moves over the
CWA Saturday morning, flipping our winds from the north to
southeast.

Another weather system approaches from the west, tightening our
gradient and increasing our cloud cover on Saturday. As winds turn
more southerly, moisture will be pumped up from the Gulf ahead of
the surface low. Wide-spread precipitation will begin Saturday
evening, which has slowed down from yesterday's timing. Models vary
with the timing; some indicate precipitation beginning as early as
24/02Z (Saturday at 8 pm), while the GFS has it beginning in the
western counties between 00 and 06Z (6 pm to midnight Saturday).
Chances of snow exist over the entire CWA by midday Sunday, with
Sunday evening appearing to be the most ideal time for snow.
Originally this system would exit our area Monday morning, followed
quickly by a low coming from Texas, but latest runs indicate this
second low pressure will remain further south, but confidence on
this track is presently not high, and there remains a chance that
this low tracks a bit further north, threatening the southern
counties with another round of snow throughout Monday.

BKL

&&

.AVIATION...
For the 18Z TAFs...

Gusty south-southwesterly winds this afternoon and evening, and
the threat for LLWS this evening are the primary weather concerns
through the period.

South-southwesterly winds will continue to increase and become
gusty across the area this afternoon in response to a strong area
of low pressure tracking eastward across south central Canada.
As a consequence of this, we can expect gusts up in the 25 to 30
kt range for a period late this afternoon into the early evening.
LLWS will also be a concern this evening as the winds about 2,000
feet AGL increase into the 50 to 60 kt range. Fortunately the
winds should ease and turn more westerly overnight as the surface
low shifts over eastern Ontario. Breezy westerly winds are
expected for Thursday.

Otherwise, expect VFR conditions through the period.

KJB

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...Small Craft Advisory...Gary to Michigan City IN until 9 AM Friday.

     Small Craft Advisory...Winthrop Harbor to Gary IN until
     midnight Friday.

&&

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Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
346 PM CST Wed Jan 20 2021

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-212200-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
346 PM CST Wed Jan 20 2021 /446 PM EST Wed Jan 20 2021/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

 Limited Non Thunderstorm Wind Risk.

DISCUSSION...

Breezy southwest winds with gust in excess of 30 mph are expected
through this evening.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
  Limited Non Thunderstorm Wind Risk.
Friday and Saturday...
  Limited Excessive Cold Risk.

DISCUSSION:

Breezy west winds with wind gusts approaching 30 mph are expected
Thursday.

Friday, wind chills in the single digits are possible mainly
northwest of I-55. Friday night into Saturday morning, low
temperatures near zero and wind chills below zero are possible,
mainly along and north of I-88.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

LMZ740>745-212200-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
346 PM CST Wed Jan 20 2021

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Tonight.

Weather hazards expected...

  Hazardous conditions for small craft.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thursday...
  Hazardous conditions for small craft are likely.
Friday...
  Hazardous conditions for small craft are likely.
  Limited Freezing Spray Risk.
Monday and Tuesday...
  Hazardous conditions for small craft are likely.

Petr

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