IEM VTEC Product Browser
This application allows easy navigation of National Weather Service issued products with Valid Time Event Coding (VTEC).
13 Nov 2024 Update: The tool was updated to use non-hash link style URLs. A shim is in place to translate the old URLs to the new ones, so nothing should be broken (famous last words). This was done to allow the HTML5 History API to provide a better user experience.
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- Help: This page!
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2025 [KLOT] CHICAGO Marine Dense Fog (MF) Advisory (Y) Number 3
Listing of Counties/Parishes/Zones Included in Product
RADAR Composite at Issuance Time
Storm Based Warning History
692 WHUS73 KLOT 301000 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 500 AM CDT Sun Mar 30 2025 LMZ740>742-301800- /O.NEW.KLOT.MF.Y.0003.250330T1000Z-250330T1500Z/ /O.CON.KLOT.SC.Y.0040.250330T1400Z-250401T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 500 AM CDT Sun Mar 30 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 4 AM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than 1 NM. For the Small Craft Advisory, south winds to 30 kt shifting southwest this afternoon and northwest to 25 kt tonight and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 10 AM CDT this morning. For the Small Craft Advisory, from 9 AM this morning to 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743>745-301800- /O.CON.KLOT.SC.Y.0040.250330T1400Z-250401T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 500 AM CDT Sun Mar 30 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 4 AM CDT TUESDAY... * WHAT...South winds to 30 kt shifting southwest this afternoon and northwest to 25 kt tonight and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 9 AM this morning to 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
448 WHUS73 KLOT 301500 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1000 AM CDT Sun Mar 30 2025 LMZ740>742-302300- /O.EXP.KLOT.MF.Y.0003.000000T0000Z-250330T1500Z/ /O.CON.KLOT.SC.Y.0040.000000T0000Z-250401T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1000 AM CDT Sun Mar 30 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY... ...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM CDT THIS MORNING... * WHAT...South to southwest winds to 25 kt shifting northwest tonight and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-302300- /O.CON.KLOT.SC.Y.0040.000000T0000Z-250401T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1000 AM CDT Sun Mar 30 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY... * WHAT...South to southwest winds to 30 kt shifting northwest to 25 kt tonight and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
Permalink to 202503301000-KLOT-WHUS73-MWWLOT
692 WHUS73 KLOT 301000 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 500 AM CDT Sun Mar 30 2025 LMZ740>742-301800- /O.NEW.KLOT.MF.Y.0003.250330T1000Z-250330T1500Z/ /O.CON.KLOT.SC.Y.0040.250330T1400Z-250401T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 500 AM CDT Sun Mar 30 2025 ...DENSE FOG ADVISORY IN EFFECT UNTIL 10 AM CDT THIS MORNING... ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 4 AM CDT TUESDAY... * WHAT...For the Dense Fog Advisory, dense fog will reduce visibility to less than 1 NM. For the Small Craft Advisory, south winds to 30 kt shifting southwest this afternoon and northwest to 25 kt tonight and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...For the Dense Fog Advisory, until 10 AM CDT this morning. For the Small Craft Advisory, from 9 AM this morning to 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. Low visibility will make navigation difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass. && $$ LMZ743>745-301800- /O.CON.KLOT.SC.Y.0040.250330T1400Z-250401T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 500 AM CDT Sun Mar 30 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 4 AM CDT TUESDAY... * WHAT...South winds to 30 kt shifting southwest this afternoon and northwest to 25 kt tonight and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...From 9 AM this morning to 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
Permalink to 202503301500-KLOT-WHUS73-MWWLOT
448 WHUS73 KLOT 301500 MWWLOT URGENT - MARINE WEATHER MESSAGE National Weather Service Chicago IL 1000 AM CDT Sun Mar 30 2025 LMZ740>742-302300- /O.EXP.KLOT.MF.Y.0003.000000T0000Z-250330T1500Z/ /O.CON.KLOT.SC.Y.0040.000000T0000Z-250401T0900Z/ Winthrop Harbor to Wilmette Harbor IL- Wilmette Harbor to Northerly Island IL- Northerly Island to Calumet Harbor IL- 1000 AM CDT Sun Mar 30 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY... ...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM CDT THIS MORNING... * WHAT...South to southwest winds to 25 kt shifting northwest tonight and significant waves to 6 ft occasionally to 8 ft expected. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ LMZ743>745-302300- /O.CON.KLOT.SC.Y.0040.000000T0000Z-250401T0900Z/ Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN- Burns Harbor to Michigan City IN- 1000 AM CDT Sun Mar 30 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 AM CDT TUESDAY... * WHAT...South to southwest winds to 30 kt shifting northwest to 25 kt tonight and significant waves to 8 ft occasionally to 10 ft expected. * WHERE...Calumet Harbor IL to Michigan City IN. * WHEN...Until 4 AM CDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$
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