Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:49AM||Sunset 4:29PM||Sunday November 19, 2017 2:52 AM CST (08:52 UTC)||Moonrise 8:39AM||Moonset 6:41PM||Illumination 0%|
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|LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 917 Pm Cst Sat Nov 18 2017 |
.small craft advisory in effect through Sunday morning...
Rest of tonight..Northwest winds to 30 kt. Cloudy. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft toward daybreak.
Sunday..Northwest winds to 30 kt becoming west 15 to 25 kt. Mostly cloudy in the morning then becoming mostly Sunny. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft in the afternoon.
Sunday night..Southwest winds 15 to 25 kt. Mostly clear. Waves 2 to 4 ft.
Monday..Southwest winds to 30 kt. Sunny. Waves 2 to 4 ft building to 3 to 5 ft.
|LMZ740 Expires:201711191030;;625901 FZUS53 KLOT 190317 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 917 PM CST Sat Nov 18 2017 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>742-191030-|
7 Day Forecast for Marine Location Near Woodstock, ILHourly EDIT Help
Area Discussion for - Chicago, IL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 klot 190756|
area forecast discussion
national weather service chicago romeoville, il
156 am cst Sun nov 19 2017
121 am cst
after the soggy, windy, and cool autumn weather of the past few
days, we enter a fairly quiet and dry pattern as we head into the
thanksgiving week. Sunday will begin on the cold side of the
temperature roller coaster in wake of yesterday's system, one that
will continue to deepen across the northeast and bring this same
messy system to that region. Nighttime satellite across the
midwest depicts a still an area of stratus across much of
wisconsin, northeast il and northwest in. Despite some breaking up
of the clouds, which will gradually continue , the upper level
flow is still cyclonic, and thus the low clouds remain trapped
below a frontal inversion. As the morning continues, expect one
last upper wave to clear the area and the associated subsidence
will allow for better lower cloud clearing this afternoon. The
heart of the cold air behind this first front will shift through
the western great lakes this morning, and with increasing higher
clouds today, highs will hold in the low to mid 30s.
Passing high clouds tonight but low level warm advection as winds
shift back to southwesterly as surface high pressure, overhead
this afternoon, will shift to the ohio valley tonight. Therefore
temps will fallow back to the mid 20s in our colder areas. Highs
bounce back nicely Monday, with near 50 degree readings and
plentiful Sun other than some cirrus.
121 am cst
Monday through Saturday...
the general idea is high pressure will shift across
the great lakes, then shift off to the ohio valley and mid
atlantic regions with some regularity throughout the extended. A
series of clipper like systems will bring occasional wind, clouds
and cold spells, followed by warm ups as each high pressure
departs east. This will result in several up and down swings of
temperature. No one system is expected to bring any real
precipitation, even though occasionally Tuesday night, Wednesday
night, and toward Saturday a model will try to throw out some very
light qpf, so most of the week appears dry at this point. The
first front will lead to a little cooler day Tuesday, then a
repeat of today on Wednesday with highs only in the 30s, before
readings head back closer to normal thanksgiving day and toward
week's end before another colder shot next weekend, and maybe some
light precipitation mainly of the liquid form to accompany this|
For the 06z tafs...
concerns with the tafs through Sunday are just upper end MVFR
clouds at times through early-mid Sunday morning.
Northwest winds continue to show regular gusts and expect that to
continue, though a little less frequency overnight. Gusts into the
lower 20 kt range are likely, while sporadic mid 20 kt gusts are
possible. Winds will back to more west-northwest on Sunday
morning. Some gusts into the upper teens are likely through the
day Sunday before diminishing near sunset.
Satellite trends have shown an expansion of 2500-3500 ft clouds
across northern illinois since 03z. While there may be some brief
breaks, the clouds should generally be broken through daybreak.
Clearing by mid-morning is with medium-high confidence. Only some
cirrus is expected after that time.
156 am... Northwest gales have ended and will be canceling the
gale warning early. Northwest winds to 30 kts will slowly turn
westerly this afternoon as high pressure moves south of lake
michigan. Speeds may diminish further to 15-25kts tonight...
especially on the north end of the lake. Winds will turn to the
southwest Monday and are expected to increase to gales Monday
afternoon as strong low pressure moves across ontario Monday
night. These gales will diminish Tuesday morning and shift to the
northwest as a cold front moves across the region. High pressure
will build across the plains Tuesday and then to the southern
lakes and ohio valley Wednesday into Thursday with westerly winds
for mid week. Cms
Lot watches warnings advisories
Lm... Small craft advisory... In nearshore waters until 6 pm Sunday.
Small craft advisory... Il nearshore waters until noon Sunday.
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Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|WHRI2 - Waukegan Harbor, IL||34 mi||73 min||WNW 11 G 21||34°F|
|KNSW3 - Kenosha, WI||39 mi||53 min||NW 13 G 20||34°F||1011.5 hPa (+2.0)|
|FSTI2||49 mi||113 min||NW 11||35°F|
|CHII2 - Chicago, IL||54 mi||53 min||WNW 21 G 24||37°F||26°F|
Wind History for Calumet Harbor, IL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Burlington Municipal Airport, WI||27 mi||83 min||NW 9 G 16||10.00 mi||Overcast||34°F||27°F||78%||1011.5 hPa|
Wind History from BUU (wind in knots)
|1 day ago||S||S||S||S||S||S|
|2 days ago||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
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Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Midwest EDIT
Wind Forecast for Chicago, IL (3,6,7,8)(on/off)  Help
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