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

June 19, 2024 12:13 AM CDT (05:13 UTC) Change Location
Sunrise 5:13 AM   Sunset 8:31 PM
Moonrise 6:39 PM   Moonset 3:00 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.

Marine Forecasts
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LMZ741 Expires:202406190915;;268437 Fzus53 Klot 190244 Nshlot
nearshore marine forecast national weather service chicago/romeoville il 944 pm cdt Tue jun 18 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>742-190915- winthrop harbor to wilmette harbor il- wilmette harbor to northerly island il- northerly island to calumet harbor il- 944 pm cdt Tue jun 18 2024

.small craft advisory in effect until 4 am cdt Wednesday - .

Rest of tonight - South winds to 30 kt becoming southwest 15 to 20 kt. Partly cloudy. Waves 2 to 4 ft.

Wednesday - Southwest winds 15 to 20 kt becoming south 10 to 15 kt in the afternoon, then shifting northeast late. Chance of showers and Thunderstorms in the afternoon. Waves 1 to 3 ft.

Wednesday night - Northeast winds 10 to 15 kt becoming north 5 to 10 kt overnight. Slight chance of showers and Thunderstorms. Waves 1 to 3 ft.

Thursday - North winds 10 to 15 kt becoming northeast. Slight chance of showers and Thunderstorms. Waves 1 to 3 ft.

No data

7 Day Forecast for Marine Location Near Niles, IL
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Area Discussion for - Chicago, IL
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Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 635 PM CDT Tue Jun 18 2024


- Hot and muggy conditions will prevail through the end of the week, although cooler conditions are expected near the lake Thursday and Friday.

- Periodic chances for thunderstorms will continue, though many hours will remain dry.

Issued at 248 PM CDT Tue Jun 18 2024

Through Wednesday Night:

Forecast focus is on thunderstorm potential overnight through Wednesday evening. A cold front will be moving into the northwest cwa Wednesday afternoon. There may be some lingering showers/isolated thunderstorms ahead of this front into far northwest IL around daybreak Wednesday morning. As the front moves further into the area Wednesday afternoon, at least isolated thunderstorms will be possible. Models have a general consensus of a narrow ribbon of instability along/ahead of this front thus still some uncertainty for coverage with the best chance for any thunderstorms generally along/north of I-80. Main severe threat from any the storms would be localized damaging winds. The cold front is also expected to accelerate down Lake Michigan and several of the cams show winds turning northeasterly off the lake by late Wednesday afternoon. This could also serve as an area for development for isolated thunderstorms.

Some of the models show a weak wave lifting north across eastern IL and IN late tonight into Wednesday morning, that may bring a few showers/isolated thunderstorms to the southeast cwa by daybreak Wednesday morning.

Temperatures have warmed into the lower 90s for most areas, with dewpoints dropping back into the mid/upper 60s this afternoon.
This will keep heat index values in the upper 90s to a few locations tagging 100. Lows tonight will be similar to this morning, mid 70s for most locations, warmer in Chicago.
Wednesday will be similar to today, with highs back in the lower/mid 90s along with dewpoints in the mid/upper 60s with heat index values again in the upper 90s to 100. With the expected wind shift off the lake late Wednesday afternoon, could see some temps dropping into the 70s for areas near the lake, though overall confidence is low for the timing/speed of the boundary. Lows Wednesday night/Thursday morning are expected to be back into the upper 60s/lower 70s. cms

Thursday through Tuesday:

The amplified upper level ridge responsible for this ongoing stretch of hot weather will be in the process of flattening out heading into Thursday. This will bring the local area closer to the northern extent of 90 degree temperatures. An associated surface boundary is forecast to stall out somewhere near or just northwest of the local area on Thursday. This will serve as the focus for potential thunderstorm development, particularly across northwest Illinois and southern Wisconsin Thursday afternoon. A further south placement of this boundary would result in increasing chances of showers and thunderstorms into northern Illinois. For now opted to maintain 30-50% chances for areas mainly along and west of the Fox River Valley and north of I-80, though isolated storms can't be ruled areawide (20% chance). While there are differences in the magnitude of its influence, onshore flow will keep temperatures cooler near the lakeshore, and potentially further inland across northeast Illinois if a backdoor front can make further inroads resulting in high temperatures only in the upper 70s to mid 80s.
Otherwise expect 90s yet again for the rest of the area.

By Friday this boundary will begin to retreat back to the north and closer to the lakeshore, keeping mainly lake adjacent areas cooler. Accordingly, storm chances are relegated to near and north of the WI/IL stateline, otherwise capping looks to keep most areas dry. Saturday continues to look like the warmest day for most areas late week, including near the lakeshore given strong southerly flow developing in response to a developing surface low across the Northern Plains. This will allow temperatures to warm well into the 90s for all areas, including near the lakeshore. This surface low will eventually swing a cold front through the area Saturday night into early Sunday morning bringing the areas best potential for showers and thunderstorms (50-60% chance).

In the wake of this front cooler temperatures will prevail for the start of the week, albeit still warmer than normal, with highs in the mid-upper 80s. There are signs that this break will be short lived, however, with 90s returning to the forecast already by Tuesday as the upper ridge builds back across the central CONUS.

Deep mixing each day this week will keep dew points mostly in check this week with heat indices in the 90-100 degree range.
While no heat headlines are planned with this update, continue to take steps to beat the heat this week!


Issued at 635 PM CDT Tue Jun 18 2024

Breezy southwest winds will continue through the evening and the overnight period as unseasonably warm temperatures prevent full decoupling beneath an intensifying low-level jet. In fact, gusts may still tag 30kt a few hours after sunset. For now, will carry G28KT and make adjustments with the scheduled 03Z AMD.
Otherwise, a quiet night is in store.

Toward daybreak tomorrow, showers and thunderstorms currently in the Plains will approach the Mississippi River in a decaying form. At this point, chances for showers surviving as far east as RFD are only around 20%, so the outgoing TAF will be dry tomorrow morning. During the afternoon, showers and thunderstorms should redevelop near the remnant outflow boundary or within the otherwise warm, humid, and uncapped airmass. With meager deep-layer shear, thunderstorms will likely adhere to "pulse"-like behavior with redevelopment along outflow boundaries in stochastic fashion. While confidence in a thunderstorm impacting any given terminal is hence relatively low (20-30%), felt PROB30 groups were justified centered on peak heating (21-01Z or so), which matches when HRRR thunder probabilities maximize.

Finally, for the 30-hour ORD/MDW TAF sites, felt increased detail for winds was required in the latter 6 hours of the TAF.
First, winds will become light after sunset as the surface pressure gradient relaxes. A northeasterly wind shift off Lake Michigan will sneak into the Chicago terminals sometime in the 03-06Z window, which may even be accompanied by SCT to BKN MVFR stratus.


Issued at 305 AM CDT Tue Jun 18 2024

With a high temperature of 97 degrees recorded at O'Hare Airport yesterday, Chicago broke its daily high temperature record of 96 degrees for June 17th, which was previously set in 1887 and 1957. A few additional temperature records (primarily some of the record warmest low temperatures for both Chicago and Rockford) may be threatened over the next few days.

Here are the daily high and warmest low temperature records for Chicago and Rockford for each day through Saturday, June 22nd:

Chicago --------------------------------------- Day: 6/18 6/19 6/20 6/21 6/22 --------------------------------------- Record High: 98 102 104 101 97 Record Warm Low: 77 78 78 74 76

Rockford --------------------------------------- Day: 6/18 6/19 6/20 6/21 6/22 --------------------------------------- Record High: 99 99 101 100 97 Record Warm Low: 74 76 73 71 73


IN...Air Quality Alert from midnight tonight to midnight CDT Wednesday night for INZ001-INZ002-INZ010-INZ011.

LM...Small Craft Advisory until 10 PM CDT this evening for the IL and IN nearshore waters.

Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
45174 12 mi54 minSSE 16G21 76°F 62°F2 ft29.9966°F
OKSI2 12 mi134 minNW 1.9G7 83°F
CHII2 - Chicago, IL 14 mi44 minSSW 27G29 84°F 73°F
45198 15 mi44 minS 18G21 76°F 62°F2 ft30.07
CNII2 15 mi44 minS 15G20 81°F 64°F
CMTI2 - 9087044 - Calumet, IL 24 mi56 minS 8.9G13 81°F 30.0569°F
45186 25 mi44 minESE 9.7G14 71°F 57°F1 ft
45187 34 mi44 minS 14G21 70°F 47°F1 ft
KNSW3 - Kenosha, WI 41 mi74 minSSW 7G13 84°F 30.00
BHRI3 - Burns Harbor, IN 43 mi94 minS 8G14 80°F 30.09
45170 48 mi54 minS 12G16 75°F 1 ft30.11
45199 49 mi74 minSSE 12 64°F 61°F2 ft30.03

Wind History for Calumet Harbor, IL
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Airport Reports
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Wind History graph: ORD
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Chicago, IL,

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