Evanston, IL Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Evanston, IL

April 17, 2024 5:46 PM CDT (22:46 UTC) Change Location
Sunrise 6:04 AM   Sunset 7:36 PM
Moonrise 1:31 PM   Moonset 3:43 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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Marine Forecasts
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LMZ741 Expires:202404180330;;914936 Fzus53 Klot 172003 Nshlot
nearshore marine forecast national weather service chicago/romeoville il 303 pm cdt Wed apr 17 2024
for waters within five nautical miles of shore on lake michigan
waves are provided as a range of significant wave heights, which is the average of the highest 1/3 of the waves, along with the average height of the highest 10 percent of the waves which will occasionally be encountered.
lmz740>742-180330- winthrop harbor to wilmette harbor il- wilmette harbor to northerly island il- northerly island to calumet harbor il- 303 pm cdt Wed apr 17 2024

.small craft advisory in effect through late tonight - .

Tonight - West winds to 30 kt with occasional gales to 35 kt diminishing to 10 to 15 kt. Mostly cloudy in the evening then clearing. Waves 2 to 4 ft subsiding to around 1 ft.

Thursday - Northwest winds 5 to 10 kt becoming northeast 10 to 15 kt in the afternoon. Chance of showers in the morning, then showers likely in the afternoon. Waves 1 ft or less building to 1 to 2 ft.

Thursday night - North winds 10 to 20 kt becoming northwest overnight. Showers in the evening. Waves 1 to 2 ft.

Friday - Northwest winds 10 to 20 kt becoming west 15 to 25 kt. Sunny in the morning, then becoming partly cloudy. Waves 1 to 3 ft.

LMZ700
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7 Day Forecast for Marine Location Near Evanston, IL
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Area Discussion for - Chicago, IL
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FXUS63 KLOT 171959 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 259 PM CDT Wed Apr 17 2024

KEY MESSAGES

- Periods of showers on Thursday with a few thunderstorms and instances of heavy downpours possible

- Much cooler over the weekend with frost/freeze concerns, particularly on Saturday night

DISCUSSION
Issued at 228 PM CDT Wed Apr 17 2024

Through Thursday Night:

We find ourselves beneath mostly cloudy skies this afternoon with just a few pockets of very light rain found north of I-88. The clouds and rain are remnants of the same storm system that brought yesterday's and this morning's thunderstorms to the area, which is now centered up in central Wisconsin. As the low continues to pull away from the region this afternoon, subsidence behind the departing system will shave away what little low level instability we have and the light rain should call it quits after mid-afternoon. Cloud cover will clear up nicely through the evening and overnight, but will fill back in tomorrow morning ahead of our next rain system.

A center of low pressure will spin up in the western Plains tonight and will quickly trek into the lower Midwest by midday tomorrow. The behavior and track of the low is not well agreed upon for tomorrow. What looks to be a small majority of guidance suggests that the low will track south of the area. The NAM and Euro are farthest north with the track and pull the center of the low into the southern reaches of our CWA A few thunderstorms in our south look rather likely if the storm takes such a track with ample instability and forcing near the center of the low. Thunder parameters drop off pretty quickly as you move north of the low pressure center. If the low tracks not too far south of the CWA (a popular opinion among models), tall, skinny CAPE profiles just north of the low could still promote a few light thunderstorms in our south, but may favor a bit more the potential for a period of healthy downpours.

Models are in good agreement that we'll see intense deformation of the low level wind field occur on the northwestern periphery of the system. This will lead to a robust frontogenetic circulation barreling across the region just trailing the center of the low. It's influence on the low itself is uncertain and is a big contributor to the overall lack of confidence with this storm. Several models, including a big chunk of available high-res guidance, have the deformation stretching and elongating the orientation of the low prior to moving into the region. Such solutions spread out the coverage of instability a bit, in some instances pulling it farther north into our CWA, while also diffusing the magnitude of low level forcing. The RAP is one such example of this.

The initial push of rain, which may miss parts of the CWA to the south, will occur during the morning into the afternoon. It looks like we'll see a relative lull in activity during the afternoon. This is before a second round of showers is expected during the evening. This second round will be a direct result of the trailing f-gen circulation and presents a concern for an area of sizable rainfall amounts. A handful of models drop a swath of 1"+ of QPF on parts of the area underneath this band of potentially heavy showers. With so much yet to be resolved with this system, we'll have to keep a close eye on model trends into tomorrow.

Doom

Friday through Wednesday:

After several days of unseasonable warmth, a dry and cool airmass will settle across the region Friday into early next week. Westerly winds gusting to 30 mph across portions of northern Illinois combined with the dry airmass will support the potential for elevated brush fire spread Friday afternoon.
Daytime highs in the 50s Friday through Sunday will moderate closer to seasonal normals in the 60s by Monday. While a surface ridge is expected to remain west of the forecast area Saturday night, some decoupling will allow temps to fall into the 30s nearly areawide. Will maintain frost mention in the grids for areas away from the lake and the core of the Chicago metro.

While forecast guidance is in decent agreement with a compact mid-level wave digging southeast across the Upper Great Lakes Monday night into Tuesday, somewhat complicated phasing of a western Canada trough and another longwave trough over Hudson Bay suggests forecast guidance is subject to notable changes this far out. At this time, will advertise high-end chance to low- end likely PoPs with a few embedded thunderstorms.

Kluber

AVIATION /18Z TAFS THROUGH 00Z FRIDAY/
Issued at 1246 PM CDT Wed Apr 17 2024

Key Aviation Messages: - W gusts over 30 knots into this evening - NE wind shift mid-morning Thursday

MVFR ceilings are expected to persist through this evening and possibly overnight. Widely isolated -SHRA may also continue into mid- afternoon. Meanwhile, W/WSW winds gusting over 30 knots will veer WNW by late afternoon, then gradually diminish tonight while further veering NW. Winds may become VRB late tonight through sunrise Thursday before shifting NE under 10 knots mid- morning. Otherwise, scattered -SHRA are expected late morning through early afternoon Thursday, with higher coverage of -RA just beyond the current TAF period Thursday evening.

Kluber

LOT WATCHES/WARNINGS/ADVISORIES
IL...None.
IN...None.
LM...Small Craft Advisory until 3 AM CDT Thursday for the IL and IN nearshore waters.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
OKSI2 9 mi107 min NW 5.1G9.9 61°F
CHII2 - Chicago, IL 10 mi57 min W 30G36 62°F 53°F
CNII2 13 mi32 min WSW 12G19 58°F 46°F
CMTI2 - 9087044 - Calumet, IL 22 mi47 min SW 8G18 29.76
WHRI2 - Waukegan Harbor, IL 24 mi107 min WSW 13
BHRI3 - Burns Harbor, IN 39 mi67 min W 13G17 57°F 29.77
KNSW3 - Kenosha, WI 39 mi47 min WSW 11G16 59°F 29.72
MCYI3 - Michigan City, IN 46 mi57 min WSW 19G20 54°F 29.7447°F


Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KORD CHICAGO O'HARE INTL,IL 12 sm55 minW 20G3110 smOvercast59°F48°F67%29.75
KPWK CHICAGO EXECUTIVE,IL 12 sm54 minW 14G2710 smOvercast59°F48°F67%29.76
KMDW CHICAGO MIDWAY INTL,IL 17 sm53 minW 19G3010 smOvercast61°F46°F59%29.78
Link to 5 minute data for KPWK


Wind History from PWK
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Tide / Current for
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Weather Map
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GEOS Local Image of great lakes   
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Chicago, IL,



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