Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 5:13AM||Sunset 8:33PM||Monday June 21, 2021 1:52 AM CDT (06:52 UTC)||Moonrise 5:08PM||Moonset 2:44AM||Illumination 86%|
7 Day Forecast for Marine Location Near Lake Bluff, ILHourly EDIT Help
Area Discussion for - Chicago, IL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KLOT 210555 AFDLOT
Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 1255 AM CDT Mon Jun 21 2021
SHORT TERM. 344 PM CDT
Through Monday night .
Convection from this evening's expected activity should be clear of the area by morning with the passage of the frontal zone, but additional daytime showers could develop as the strong upper vort lobe swings through during the period of peak afternoon heating. Low levels will be well mixed and unstable given the breezy northwest winds, but any convection that manages to develop should be relatively shallow given a projected warm nose around the 700mb level. Thus thunderstorms appear to be less likely relative to isolated showers. In addition, with the cooler and drier airmass, afternoon heat indices should be 10 to 20 degrees below today's values. Actual highs will only reach the upper 60s to lower 70s.
LONG TERM. 344 PM CDT
Tuesday through Sunday .
Northwest and westerly low level flow around a surface ridge passing to our south will support cooler and drier conditions continuing into Tuesday. A warmer and more humid airmass then returns for Wednesday as the ridge moves into the Ohio Valley and winds turn more southerly again. Weak disturbances in mid and upper level flow may support a small chance of precip Tuesday night into early Wednesday for northern portions of the area. By Thursday afternoon and especially into Friday, models are showing a more pronounced upper disturbance with a corresponding surface low and frontal zone. The peak period for associated shower and thunderstorm activity appears to be late Thursday through Friday . with the weekend showing typical summertime heat with slight chances of storms. The timing of these features through the area could of course change, which would also influence the weekend outlook.
AVIATION. For the 06Z TAFs .
Aviation Forecast Concerns:
* Thunderstorms exiting the Chicago metro to the southeast at this time. Brief VCTS mention at MDW/GYY next hour or so.
* Wind shift to northwest during the pre-dawn hours with increasing winds and gusts 25+ kts. Winds remain breezy but gradually diminish. Likely turn northeast along the Lake Michigan shore and the Chicago metro terminals Monday afternoon.
* Period of MVFR ceilings behind cold front into Monday morning. Improving to VFR Monday afternoon.
Trailing edge of thunderstorm squall-line was roughly from KGYY southwest to KJOT and KPIA at 0530Z. Thunder lingering at KGYY will move out within the next hour or so. Farther northwest, a surface cold front was trailing across southwest WI and eastern IA from low pressure over northeast WI. Winds will shift westerly just ahead of the front 07-08Z, then northwest as the front itself moves through the terminals 09-11Z. Gusts in excess of 25 kts are possible for a time into early Monday morning, before slowly easing and eventually veering more northerly during the day. Winds will likely turn 010-020 degrees across the Chicago metro sites Monday afternoon.
Also behind the front, MVFR ceilings in the 1500-2000 foot range were noted, and a period of MVFR is likely for the terminals from the pre-dawn hours into Monday morning before improving to VFR.
LOT WATCHES/WARNINGS/ADVISORIES. IL . None. IN . Beach Hazards Statement . INZ001-INZ002 . 7 AM Monday to 10 PM Monday.
LM . Small Craft Advisory . IL nearshore waters until 3 PM Monday.
Small Craft Advisory . IN nearshore waters until 10 PM Monday.
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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|
|45186||6 mi||42 min||68°F||66°F||1 ft|
|WHRI2 - Waukegan Harbor, IL||6 mi||112 min||S 18 G 23||67°F|
|45174||14 mi||42 min||S 9.7 G 14||68°F||1 ft||997.8 hPa|
|45187||15 mi||42 min||66°F||65°F||1 ft|
|KNSW3 - Kenosha, WI||21 mi||52 min||SSW 5.1 G 6||68°F||998 hPa (-4.0)|
|OKSI2||28 mi||112 min||WSW 1.9 G 4.1||69°F|
|CHII2 - Chicago, IL||29 mi||52 min||S 21 G 24||68°F||68°F|
|CNII2||32 mi||37 min||S 11 G 25||68°F||66°F|
|JAKI2||37 mi||112 min||SSW 5.1 G 13||68°F|
|CMTI2 - 9087044 - Calumet, IL||41 mi||58 min||S 6 G 8.9||999.4 hPa|
Wind History for Calumet Harbor, IL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Chicago/Waukegan Regional Airport, IL||10 mi||57 min||SW 6||10.00 mi||Fair||67°F||65°F||93%||997.1 hPa|
|Chicago / Wheeling, Pal-Waukee Airport, IL||12 mi||60 min||SSW 9||10.00 mi||A Few Clouds||69°F||67°F||93%||999 hPa|
|Chicago, Chicago-O'Hare International Airport, IL||21 mi||61 min||SSW 10 G 19||10.00 mi||Overcast||69°F||67°F||93%||998.5 hPa|
|Kenosha, Kenosha Regional Airport, WI||22 mi||59 min||WSW 7||10.00 mi||Fair||69°F||66°F||90%||997.3 hPa|
Link to 5 minute data for KUGN
Wind History from UGN (wind in knots)
|1 day ago||Calm||Calm||S||Calm||SW||N||NE||SW||SW|
|2 days ago||S||SE||N||NE||NW|
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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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