Alert archive / Illinois / Storm Warnings in 2021
Storm Warning 1, NWS Chicago, IL
NWS Chicago, IL issued this storm warning at Dec 15, 2021, 3:51 AM CST. It took effect at Dec 15, 2021, 6:00 PM CST. It was in force for 15 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 15, 2021, 3:51 AM CST (09:51 UTC)
- In effect from
- Dec 15, 2021, 6:00 PM CST
- Expired
- Dec 16, 2021, 9:00 AM CST
- In force
- 15 hr
- Issued by
- NWS Chicago, IL
The text
As transmitted.
945 WHUS73 KLOT 150951 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 351 AM CST Wed Dec 15 2021 LMZ743>745-151800- /O.CON.KLOT.SC.Y.0107.211215T1500Z-211216T0000Z/ /O.UPG.KLOT.SR.A.0001.211216T0000Z-211216T1500Z/ /O.NEW.KLOT.GL.W.0022.211216T0000Z-211216T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 351 AM CST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 6 PM CST THIS EVENING... ...GALE WARNING IN EFFECT FROM 6 PM THIS EVENING TO 3 PM CST THURSDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt. For the Gale Warning, southwest winds to 45 kt with a few storm force gusts up to 50 kt. Significant waves to 7 ft. Occasional waves to 9 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, from 9 AM to 6 PM CST today. For the Gale Warning, from this evening through Thursday morning. * IMPACTS...Very strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare to remain in port, alter course, and/or secure the vessel for severe conditions before conditions deteriorate. A Gale Warning means winds of 34 to 47 knots are imminent or occurring. Operating a vessel in gale conditions requires experience and properly equipped vessels. It is highly recommended that mariners without the proper experience seek safe harbor prior to the onset of gale conditions. A Small Craft Advisory means that wind speeds of 21 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners...especially those operating smaller vessels should avoid navigating in these conditions. && $$ LMZ740>742-151800- /O.CON.KLOT.SC.Y.0107.211215T1500Z-211216T0000Z/ /O.UPG.KLOT.SR.A.0001.211216T0000Z-211216T1500Z/ /O.NEW.KLOT.SR.W.0001.211216T0000Z-211216T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 351 AM CST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 6 PM CST THIS EVENING... ...STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST THURSDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt. For the Storm Warning, southwest storm force wind gusts up to 50 kt. Significant waves to 9 ft. Occasional waves to 12 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, from 9 AM to 6 PM CST today. For the Storm Warning, from this evening through Thursday morning. * IMPACTS...Very strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should prepare to remain in port, alter course, and/or secure the vessel for severe conditions before conditions deteriorate. A Storm Warning means winds of 48 to 63 knots are imminent or occurring. Recreational boaters should remain in port...or take shelter until winds and waves subside. Commercial vessels should prepare for very strong winds and dangerous sea conditions...and consider remaining in port or taking shelter in port until winds and waves subside. A Small Craft Advisory means that wind speeds of 21 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners...especially those operating smaller vessels should avoid navigating in these conditions. && $$
5 follow-up statements
199 WHUS73 KLOT 151636 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1036 AM CST Wed Dec 15 2021 LMZ743>745-160045- /O.CON.KLOT.SC.Y.0107.000000T0000Z-211216T0000Z/ /O.CON.KLOT.GL.W.0022.211216T0000Z-211216T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1036 AM CST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... ...GALE WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 3 PM CST THURSDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt. For the Gale Warning, southwest winds to 45 kt with a few storm force gusts up to 50 kt. Significant waves to 7 ft. Occasional waves to 9 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, until 6 PM CST today. For the Gale Warning, from this evening through Thursday morning. * IMPACTS...Very 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. && $$ LMZ740>742-160045- /O.CON.KLOT.SC.Y.0107.000000T0000Z-211216T0000Z/ /O.CON.KLOT.SR.W.0001.211216T0000Z-211216T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1036 AM CST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... ...STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 9 AM CST THURSDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt. For the Storm Warning, southwest storm force wind gusts up to 50 kt. Significant waves to 9 ft. Occasional waves to 12 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, until 6 PM CST today. For the Storm Warning, from this evening through Thursday morning. * IMPACTS...Very strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for severe conditions. && $$
997 WHUS73 KLOT 152143 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 343 PM CST Wed Dec 15 2021 LMZ743>745-160545- /O.CON.KLOT.SC.Y.0107.000000T0000Z-211216T0000Z/ /O.CON.KLOT.GL.W.0022.211216T0000Z-211216T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 343 PM CST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... ...GALE WARNING REMAINS IN EFFECT UNTIL 3 PM CST THURSDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt with a few gusts to 35 kt gales. For the Gale Warning, southwest winds to 45 kt with a few storm force gusts up to 50 kt. Significant waves to 8 ft. Occasional waves to 10 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, until 6 PM CST today. For the Gale Warning, from this evening through Thursday morning. * IMPACTS...Very 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. && $$ LMZ740>742-160545- /O.CON.KLOT.SC.Y.0107.000000T0000Z-211216T0000Z/ /O.CON.KLOT.SR.W.0001.211216T0000Z-211216T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 343 PM CST Wed Dec 15 2021 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... ...STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THURSDAY... * WHAT...For the Small Craft Advisory, south winds to 30 kt with a few gusts to 35 kt gales. For the Storm Warning, southwest storm force wind gusts up to 50 kt. Significant waves to 9 ft. Occasional waves to 12 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, until 6 PM CST today. For the Storm Warning, from this evening through Thursday morning. * IMPACTS...Very strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for severe conditions. && $$
422 WHUS73 KLOT 160356 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 956 PM CST Wed Dec 15 2021 LMZ743>745-161200- /O.UPG.KLOT.GL.W.0022.000000T0000Z-211216T2100Z/ /O.EXA.KLOT.SR.W.0001.000000T0000Z-211216T1500Z/ /O.NEW.KLOT.GL.W.0023.211216T1500Z-211216T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 956 PM CST Wed Dec 15 2021 ...STORM WARNING IN EFFECT UNTIL 9 AM CST THURSDAY... ...GALE WARNING IN EFFECT FROM 9 AM TO 3 PM CST THURSDAY... * WHAT...For the Storm Warning, winds up to 50 kt. For the Gale Warning, gales up to 35 kt. * WHERE...Calumet Harbor IL to Gary IN, Gary to Burns Harbor IN and Burns Harbor to Michigan City IN. * WHEN...For the Storm Warning, until 9 AM CST Thursday. For the Gale Warning, from 9 AM to 3 PM CST Thursday. * 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. && $$ LMZ740>742-161200- /O.CON.KLOT.SR.W.0001.000000T0000Z-211216T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 956 PM CST Wed Dec 15 2021 ...STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THURSDAY... * WHAT...storm force wind gusts up to 50 kt. Significant waves to 9 ft. Occasional waves to 12 ft. * WHERE...Portions of Lake Michigan. * WHEN...For the Small Craft Advisory, until 6 PM CST today. For the Storm Warning, from this evening through Thursday morning. * IMPACTS...Very strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for severe conditions. && $$
218 WHUS73 KLOT 160901 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 301 AM CST Thu Dec 16 2021 LMZ743>745-161715- /O.CON.KLOT.SR.W.0001.000000T0000Z-211216T1500Z/ /O.CON.KLOT.GL.W.0023.211216T1500Z-211216T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 301 AM CST Thu Dec 16 2021 ...STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... ...GALE WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 3 PM CST THIS AFTERNOON... * WHAT...For the Storm Warning, southwest gales to 45 kt with occasional storm force winds to 50 kt. For the Gale Warning, southwest gales up to 40 kt. Significant waves to 7 ft. Occasional waves to 9 ft. * WHERE...Gary to Burns Harbor IN, Burns Harbor to Michigan City IN and Calumet Harbor IL to Gary IN. * WHEN...For the Storm Warning, until 9 AM CST this morning. For the Gale Warning, from 9 AM this morning to 3 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. && $$ LMZ740>742-161500- /O.CON.KLOT.SR.W.0001.000000T0000Z-211216T1500Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 301 AM CST Thu Dec 16 2021 ...STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST THIS MORNING... * WHAT...Storm force wind gusts up to 50 to 55 kt. Significant waves to 7 ft. Occasional waves to 9 ft. * WHERE...Northerly Island to Calumet Harbor IL, Winthrop Harbor to Wilmette Harbor IL and Wilmette Harbor to Northerly Island IL. * WHEN...Until 9 AM CST this morning. * IMPACTS...Very strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should remain in port, alter course, and/or secure the vessel for severe conditions. && $$
291 WHUS73 KLOT 161437 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 837 AM CST Thu Dec 16 2021 LMZ743>745-162100- /O.EXP.KLOT.SR.W.0001.000000T0000Z-211216T1500Z/ /O.CON.KLOT.GL.W.0023.211216T1500Z-211216T2100Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 837 AM CST Thu Dec 16 2021 ...GALE WARNING REMAINS IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... ...STORM WARNING WILL EXPIRE AT 9 AM CST THIS MORNING... * WHAT...West winds 20 to 25 kt with gusts up to 35 kt and waves 4 to 7 ft expected. * WHERE...Gary to Burns Harbor IN, Burns Harbor to Michigan City IN and Calumet Harbor IL to Gary IN. * WHEN...For the Storm Warning, until 9 AM CST this morning. For the Gale Warning, from 9 AM this morning to 3 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. && $$ LMZ740>742-162100- /O.EXP.KLOT.SR.W.0001.000000T0000Z-211216T1500Z/ /O.EXA.KLOT.GL.W.0023.211216T1500Z-211216T2100Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 837 AM CST Thu Dec 16 2021 ...GALE WARNING IN EFFECT UNTIL 3 PM CST THIS AFTERNOON... ...STORM WARNING WILL EXPIRE AT 9 AM CST THIS MORNING... * WHAT...West winds 20 to 25 kt with gusts up to 35 kt and waves 3 to 5 ft expected. * WHERE...Winthrop Harbor to Wilmette Harbor IL, Wilmette Harbor to Northerly Island IL and Northerly Island to Calumet Harbor IL. * WHEN...For the Storm Warning, until 9 AM CST this morning. For the Gale Warning, from 9 AM this morning to 3 PM CST this afternoon. * IMPACTS...Strong winds will cause hazardous waves which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe conditions. && $$
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 9:14 PM CST | Storm Watch | LOT | 7 hr | |
| Dec 15, 3:09 AM CST | High Wind Warning | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 30 hr |
| Dec 15, 3:51 AM CST | Gale Warning | LOT | 18 hr |
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.