Tuesday, May11, 2021
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Marine Weather and Tides
Wilmette, IL

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 5:32AMSunset 8:02PM Tuesday May 11, 2021 6:32 AM CDT (11:32 UTC) Moonrise 5:40AMMoonset 8:05PM Illumination 0% Phase: New Moon; Moon at 29 days in cycle
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:202105111515;;936155 Fzus53 Klot 110819 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 319 Am Cdt Tue May 11 2021 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>742-111515- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 319 Am Cdt Tue May 11 2021
Today..Northeast winds 10 to 20 kt. Sunny. Waves 1 to 3 ft building to 2 to 4 ft late in the afternoon.
Tonight..North winds 10 to 15 kt. Mostly clear. Waves 1 to 3 ft subsiding to 1 ft or less after midnight.
Wednesday..North winds 5 to 10 kt becoming southeast in the afternoon. Sunny. Waves 1 ft or less.
Wednesday night..East winds 5 to 10 kt becoming south after midnight. Mostly clear. Waves 1 ft or less.
LMZ741


7 Day Forecast for Marine Location Near Wilmette, IL
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location: 42.08, -87.73     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 110802 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 302 AM CDT Tue May 11 2021

SHORT TERM. 302 AM CDT

Through Wednesday .

Tenacious cloud cover tied to a persistent region of modest but broad isentropic upglide is finally making southward progress out of our forecast area early this morning as the mid-level flow has started to veer more appreciably. We'll eventually lose this altostratus deck completely, but should start to gain a bit more in the way of high cloud cover ahead of an advancing low-amplitude shortwave currently translating across the central plains. With high pressure building in to our north, we'll see a lake breeze charge inland this afternoon which will probably push all the way through our I-39 locales by early this evening. Associated lake cooling will likely hold high temperatures in the upper 40s/near 50 degrees near the lake, with upper 50s/near 60 degree readings becoming more prevalent with inland extent. A notably more cloud- free sky tonight should allow temperatures to more uniformly fall into the mid 30s, so we'll once again be headed for additional frost headlines away from Chicago once this current batch expires later this morning.

Wednesday will see our sprawling 1030+ mb high build essentially directly overhead. H85 temps will take a bit of a jump as this occurs, which will allow our surface temperatures to respond by inching back into the low and even mid 60s away from the lake, with low to mid 50s lakeside. Think we'll start to build a somewhat healthier and more expansive diurnal cumulus field on Wednesday afternoon away from the lake shadow, but no precipitation is anticipated.

Carlaw

LONG TERM. 302 AM CDT

Wednesday night through Monday .

Wednesday night should finally feature our last in a series of frosty nights across the region and likely on a bit more of a localized basis as high pressure starts to build off to our east. We'll continue the warming trend through the end of the week, although continued daily lake breezes--which will begin to lose some oomph with time as the background gradient flow increases-- will hold temperatures across northeast Illinois lakeside locales 5 to 10 degrees under inland values which, but Friday, may start to make a run for the lower 70s.

While the gridded forecast through the end of the week remains precipitation-free area wide, there's probably a non-zero potential for a few spits of rain on Thursday the diurnal cumulus gets a bit deeper and we start to carve out some non-zero surface-based instability.

By this weekend, our protective high pressure will finally build far enough east of us to open us back up to return flow with a low-level jet forecast to start pumping increased moisture across the area. Global guidance has been--and continues to--offer up varying solutions regarding just how quickly dewpoints increase more appreciably. It does look like we'll probably start to transition to a more unsettled weather pattern during the Saturday-Sunday timeframe with ensemble support for higher precipitation chances increasing towards Sunday. Depending on where the main jet forcing and instability axis sets up shop, there will likely be a corridor where some heavier rain and thunderstorms materializes, but whether that's across our forecast area of farther downstate remains to be seen.

Carlaw

AVIATION. For the 06Z TAFs .

Aviation Forecast Highlights:

* Northeast surface winds through the period, generally 10-15 kt during daytime hours.

* Dry with VFR conditions through the period.

High pressure across Minnesota and the northern Plains will settle southward toward the area keeping northeasterly winds in place through the period. Speeds will be light overnight with some variation on the northeast direction. Speeds will increase into the 10-15 kt range by late morning and continue through the afternoon before diminishing this evening. Expect calm to light and variable winds by late evening into early Wednesday with the high in close proximity.

VFR will continue with scattered to broken clouds yet tonight as an upper level disturbance continues to generate an east-west band of cloud cover over the terminals. This will shift off to the east later this morning. Otherwise may see some limited cumulus development later this morning.

MDB

LOT WATCHES/WARNINGS/ADVISORIES. IL . Frost Advisory . ILZ003-ILZ004-ILZ005-ILZ006-ILZ008-ILZ011- ILZ012-ILZ013-ILZ103 until 8 AM Tuesday.

IN . None. LM . None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
45174 5 mi33 min N 5.8 G 7.8 49°F2 ft1025.8 hPa (+1.2)
OKSI2 13 mi93 min NE 6 G 7 46°F
CHII2 - Chicago, IL 14 mi43 min NNE 8.9 G 9.9 44°F 36°F
CNII2 17 mi33 min NNE 6 G 9.9 43°F 32°F
WHRI2 - Waukegan Harbor, IL 20 mi93 min 37°F
JAKI2 22 mi93 min NE 5.1 G 12 46°F
CMTI2 - 9087044 - Calumet, IL 26 mi63 min N 5.1 G 7 1024.8 hPa
45187 29 mi33 min NW 7.8 G 9.7 40°F 49°F1 ft
KNSW3 - Kenosha, WI 35 mi33 min NW 6 G 8.9 39°F 1026.1 hPa
BHRI3 - Burns Harbor, IN 43 mi53 min NNE 7 G 8 44°F 1025.7 hPa

Wind History for Calumet Harbor, IL
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N5
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G15
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G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL9 mi41 minN 010.00 miFair36°F32°F86%1026.7 hPa
Chicago, Chicago-O'Hare International Airport, IL11 mi42 minN 010.00 miA Few Clouds39°F31°F73%1026.1 hPa
Chicago, Chicago Midway Airport, IL20 mi40 minN 010.00 miA Few Clouds39°F30°F70%1026.5 hPa

Link to 5 minute data for KPWK

Wind History from PWK (wind in knots)
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Last 24hrNE5NE5E8NE9
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E9E76E8NE9E8NE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoE8E6NE10E11
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N7NE7N5N3CalmNW3NW4CalmCalmNE5N4NE7
2 days agoNW4CalmNE4E53SE5NE7SE9E8E9E7E7E7NE6CalmS5S7S7S7S4E3NE4E8E7

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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