Alert archive / Illinois / Beach Hazards Statements in 2023
Beach Hazards Statement 21, NWS Chicago, IL
NWS Chicago, IL issued this beach hazards statement at Sep 17, 2023, 3:55 AM CDT for Cook County, Lake County, Illinois; Lake County, Porter County, Indiana. It took effect at Sep 17, 2023, 9:09 AM CDT. It was in force for 24 hr.
The area
The counties it named.
The facts
- Issued
- Sep 17, 2023, 3:55 AM CDT (08:55 UTC)
- In effect from
- Sep 17, 2023, 9:09 AM CDT
- Expired
- Sep 18, 2023, 9:05 AM CDT
- In force
- 24 hr
- Issued by
- NWS Chicago, IL
Counties Cook County, IL, Lake County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 54 km from the middle of the area, began a volume at 08:55 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.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 8.9 hours before the alert went out and 206 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.
- Mixed-layer CAPE
- 90 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1222 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
567 WHUS43 KLOT 170855 CFWLOT Coastal Hazard Message National Weather Service Chicago IL 355 AM CDT Sun Sep 17 2023 ILZ006-103-104-171700- /O.NEW.KLOT.BH.S.0021.230917T2000Z-230918T1500Z/ Lake IL-Northern Cook-Central Cook- 355 AM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT IN EFFECT FROM 3 PM CDT THIS AFTERNOON THROUGH MONDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...From 3 PM CDT this afternoon through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$ INZ001-002-171700- /O.NEW.KLOT.BH.S.0021.230918T0000Z-230918T1500Z/ Lake IN-Porter- 355 AM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT IN EFFECT FROM THIS EVENING THROUGH MONDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Lake IN and Porter Counties. * WHEN...From this evening through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$
5 follow-up statements
368 WHUS43 KLOT 171409 CFWLOT Coastal Hazard Message National Weather Service Chicago IL 909 AM CDT Sun Sep 17 2023 ILZ006-103-104-172215- /O.EXT.KLOT.BH.S.0021.230917T1409Z-230918T1500Z/ Lake IL-Northern Cook-Central Cook- 909 AM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH MONDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$ INZ001-002-172215- /O.CON.KLOT.BH.S.0021.230918T0000Z-230918T1500Z/ Lake IN-Porter- 909 AM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH MONDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Lake IN and Porter Counties. * WHEN...From 7 PM CDT this evening through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$
575 WHUS43 KLOT 171959 CFWLOT Coastal Hazard Message National Weather Service Chicago IL 259 PM CDT Sun Sep 17 2023 INZ001-002-180400- /O.EXT.KLOT.BH.S.0021.230917T2200Z-230918T1500Z/ Lake IN-Porter- 259 PM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH MONDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Lake IN and Porter Counties. * WHEN...Through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$ ILZ006-103-104-180400- /O.CON.KLOT.BH.S.0021.000000T0000Z-230918T1500Z/ Lake IL-Northern Cook-Central Cook- 259 PM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY MORNING... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$
632 WHUS43 KLOT 180211 CFWLOT Coastal Hazard Message National Weather Service Chicago IL 911 PM CDT Sun Sep 17 2023 ILZ006-103-104-181015- /O.EXT.KLOT.BH.S.0021.000000T0000Z-230918T1800Z/ Lake IL-Northern Cook-Central Cook- 911 PM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH MONDAY AFTERNOON... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 7 feet expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Through Monday afternoon. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$ INZ001-002-181015- /O.EXT.KLOT.BH.S.0021.000000T0000Z-230918T2100Z/ Lake IN-Porter- 911 PM CDT Sun Sep 17 2023 ...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH MONDAY AFTERNOON... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 7 feet expected. * WHERE...Lake IN and Porter Counties. * WHEN...Through Monday afternoon. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$
612 WHUS43 KLOT 180903 CFWLOT Coastal Hazard Message National Weather Service Chicago IL 403 AM CDT Mon Sep 18 2023 ILZ006-103-104-181715- /O.CON.KLOT.BH.S.0021.000000T0000Z-230918T1800Z/ Lake IL-Northern Cook-Central Cook- 403 AM CDT Mon Sep 18 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 feet expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Until 1 PM CDT this afternoon. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$ INZ001-002-181715- /O.CON.KLOT.BH.S.0021.000000T0000Z-230918T2100Z/ Lake IN-Porter- 403 AM CDT Mon Sep 18 2023 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON... * WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 feet expected. * WHERE...Lake IN and Porter Counties. * WHEN...Until 4 PM CDT this afternoon. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures. && $$
625 WHUS43 KLOT 181405 CFWLOT Coastal Hazard Message National Weather Service Chicago IL 905 AM CDT Mon Sep 18 2023 ILZ006-103-104-181515- /O.CAN.KLOT.BH.S.0021.000000T0000Z-230918T1800Z/ Lake IL-Northern Cook-Central Cook- 905 AM CDT Mon Sep 18 2023 ...BEACH HAZARDS STATEMENT IS CANCELLED... The danger to swimmers has decreased, but waves will remain choppy through today. $$ INZ001-002-181515- /O.CAN.KLOT.BH.S.0021.000000T0000Z-230918T2100Z/ Lake IN-Porter- 905 AM CDT Mon Sep 18 2023 ...BEACH HAZARDS STATEMENT IS CANCELLED... The danger to swimmers has decreased, but waves will remain choppy through today. $$
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 7:16 PM CDT | Areal Flood Advisory | LOT | Lee | 3 hr |
| Sep 16, 8:29 PM CDT | Areal Flood Advisory | LOT | Winnebago | 3 hr |
| Sep 16, 8:46 PM CDT | Flash Flood Warning | LOT | Winnebago | 62 min |
| Sep 17, 3:54 AM CDT | Small Craft Advisory | LOT | 29 hr | |
| Sep 17, 6:02 AM CDT | Areal Flood Advisory | LOT | Cook | 3 hr |
| Sep 17, 7:26 AM CDT | Flash Flood Warning | LOT | Cook, DuPage | 5 hr |
| Sep 17, 7:30 AM CDT | Special Marine Warning | LOT | 90 min | |
| Sep 17, 8:11 AM CDT | Special Marine Warning | LOT | 49 min | |
| Sep 17, 8:53 AM CDT | Special Marine Warning | LOT | 2 hr | |
| Sep 17, 10:07 AM CDT | Flash Flood Warning | LOT | Cook | 7 hr |
| Sep 17, 10:50 AM CDT | Flash Flood Warning | LOT | Cook | 3 hr |
| Sep 17, 12:35 PM CDT | Special Marine Warning | LOT | 115 min | |
| Sep 17, 4:57 PM CDT | Areal Flood Warning | LOT | Cook | 16 hr |
Nearby
Beach Hazards Statements in Illinois, 2023Beach Hazards Statements in Indiana, 2023Every beach hazards statement in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.