Friday, September24, 2021
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Marine Weather and Tides
Beach Park, IL

Version 3.4
NOTICE
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 6:39AMSunset 6:46PM Friday September 24, 2021 10:09 PM CDT (03:09 UTC) Moonrise 8:40PMMoonset 10:15AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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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LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 951 Pm Cdt Fri Sep 24 2021
.gale warning in effect until 1 am cdt Saturday...
Rest of tonight..Southwest gales to 35 kt becoming northwest winds 20 to 25 kt by midnight. Showers and isolated Thunderstorms ending shortly after midnight. Waves 3 to 5 ft subsiding to 2 to 4 ft after midnight.
Saturday..West winds 15 to 20 kt increasing to 20 to 25 kt by early afternoon. Sunny. Waves 1 to 3 ft.
Saturday night..West winds 10 to 20 kt. Mostly clear. Waves 1 to 3 ft.
Sunday..Southwest winds 15 to 25 kt. Sunny. Waves 1 to 3 ft.
LMZ740 Expires:202109250915;;135128 FZUS53 KLOT 250251 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 951 PM CDT Fri Sep 24 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>742-250915-


7 Day Forecast for Marine Location Near Beach Park, IL
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location: 42.41, -87.82     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 242346 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 646 PM CDT Fri Sep 24 2021

SHORT TERM. 325 PM CDT

Through Saturday .

The autumn pattern continues into the start of the weekend over the Upper Midwest into the Great Lakes, and this is highlighted by a fairly strong (albeit somewhat moisture-starved) system moving across the area tonight. Breezy conditions will continue through early to mid evening, with some gusts of 35 to possibly 40 mph late this afternoon into early evening. Showers, with isolated non-severe thunderstorms, are expected this evening. Another breezy and very dry, although slightly cooler day on Saturday will unfold with elevated fire weather concerns.

A well-defined upper circulation across the Upper Midwest as seen on GOES-16 water vapor imagery is advancing southeastward toward the area late this afternoon. Forcing for ascent is quickly improving ahead of this system and it is starting to tap into eastern Pacific moisture as well. A lead impulse is interacting with warm advection aloft in eastern Iowa into northwest Illinois, resulting in scattered showers and at times a lightning flash or two. This should move across locations along/north of I-80 and west of I-55 late this afternoon. The main focus for rain remains the lower to mid-level baroclinic zone (surface to 850 mb cold front). As this moves into the area this evening and is juxtaposed with the better forcing, shower coverage is expected to increase. There should be at least spotty thunderstorms in the region too given very steep lapse rates aloft (sampled at 8 to 9 C/km on the 12Z MPX and OAX soundings) and the dynamics of the system to continue to support ascent and greater saturation. The main time for a thunder chance in the Chicago area looks to be ~8:30 PM to midnight.

Anafrontal shower activity will shift away from the CWA during the overnight, with a quick burst of cold advection and pressure rises moving across the area. The west-northwest winds look to gust to 20 to 25 mph during the day Saturday. With some steeper low-level lapse rates over the lake, this wind vector alignment will result in higher wave action along the Porter County shore overnight into at least Saturday morning. Felt comfortable enough for a Beach Hazards Statement issuance for this.

MTF

LONG TERM.

Saturday Night through Friday .

202 PM . No significant forecast concerns this period.

An area of high pressure will be shifting southeast of the area on Saturday night with southerly flow returning by Sunday morning. Low temps by Sunday morning still likely to be in the 40s over much of the area, warmer in the immediate metro area. Forecast soundings suggest Sunday could be breezy/windy and bumped up speeds/gusts with gusts to 35 mph possible. Though there could be a fairly thick mid deck for part of the day that may limit mixing. High temps may also under perform if the clouds stick around in the afternoon but upper 70s to perhaps lower 80s is possible with some sunshine.

Monday is looking quite warm ahead of a cold front that will move across the area and highs will depend on the timing of this front. Have maintained mid 80s for most of the area. If the front is slower, than some upper 80s are doable, especially in the west and southwest cwa. A faster fropa will likely lead to lower highs for most of the area, but also a faster decline in the afternoon off the lake. The 12z ECMWF and NAM are quite progressive with the front, reaching the southern cwa by early Monday evening. Changes to this time period can be expected with later forecasts.

A large area of high pressure is expected to remain nearly stationary or slowly drift southeast across the eastern Great Lakes/Quebec/New England for the middle of next week. This is expected to keep the local area dry with east/southeast winds and afternoon lake breezes. cms

FIRE WEATHER. 325 PM CDT

Antecedent dry conditions combined with limited precip, a period of stronger winds, and a drier autumn air masses will produce increased fire weather concerns through the weekend.

Saturday: A good mixing day is expected within a very dry air mass as WSW/W winds gust to 25 mph. Dew points into the upper 20s to lower 30s (possibly as low as the mid 20s) will produce min RH values to near 20 percent. This will result in near-critical to critical fire weather conditions for Saturday afternoon.

Sunday: Southwest winds will gusts to 25 mph and support decent mixing, but increasing dew points will limit the lower bound of RH values for the day. However, min RH values into the low 30s will support continued fire weather concerns.

Kluber

AVIATION. For the 00Z TAFs .

A cluster of showers out ahead of an approaching cold front had recently moved through the area and very light, isolated showers will continue to fall for the next few hours. For the most part however, a lengthy break from the rain is expected as we wait for the cold front to close in a bit later tonight. Frontal passage along with a resulting wind NW wind shift and likely more showers is expected to begin over the Chicago terminals around 0230Z and last as late as about 06Z. A VCTS was also included in the TAF for all terminals with the exception of RFD, however thunderstorm chances at this time appear rather low. In addition, MVFR ceilings are likely along and just behind the line of showers. Sub-020 ceilings are also possible for a brief time, most likely between 04-06Z, but confidence in this at the moment is moderate at best. Drier air will slowly work its way in overnight as the front moves off to the east and winds back to westerly. This will result in the prompt return of VFR ceilings which will last through the day on Saturday. A tightening pressure gradient within the boundary layer north of an approaching center of high pressure will likely cause westerly winds to gust upwards of 20-25kts through the afternoon and early evening before decoupling will bring WSW winds down to below 10kts for the bulk of the evening push.

Doom

LOT WATCHES/WARNINGS/ADVISORIES. IL . None. IN . Beach Hazards Statement . INZ002 . midnight Saturday to noon Saturday.

LM . Gale Warning . nearshore waters until 1 AM Saturday.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WHRI2 - Waukegan Harbor, IL 3 mi70 min W 9.9 G 14
45186 3 mi30 min 16 G 23 65°F 65°F1 ft
45187 6 mi30 min NW 14 G 18 63°F 65°F1 ft
KNSW3 - Kenosha, WI 12 mi70 min W 15 G 21 70°F 1009.1 hPa (+0.6)
45174 21 mi30 min SSW 16 G 23 65°F3 ft1008 hPa
OKSI2 36 mi130 min N 1 G 4.1 75°F
CHII2 - Chicago, IL 37 mi70 min S 30 G 34 73°F 50°F
45198 38 mi30 min SSW 18 G 21 70°F 63°F2 ft56°F
MLWW3 - Milwaukee, WI 41 mi30 min NW 13 G 18 58°F
JAKI2 45 mi130 min SSW 7 G 17 73°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI 46 mi30 min S 19 G 23 69°F 66°F1007.8 hPa60°F
45013 48 mi40 min WNW 16 G 19 59°F 65°F2 ft1010.1 hPa
CMTI2 - 9087044 - Calumet, IL 49 mi52 min S 14 G 20 1008.6 hPa

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago/Waukegan Regional Airport, IL3 mi15 minNW 87.00 miLight Rain59°F0°F%1010 hPa
Kenosha, Kenosha Regional Airport, WI14 mi17 minWNW 104.00 miHeavy Rain Fog/Mist59°F55°F87%1010.9 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL21 mi18 minNW 15 G 2310.00 miOvercast67°F56°F68%1010.4 hPa
Racine, Batten International Airport, WI24 mi17 minNW 11 G 1910.00 miLight Rain58°F54°F87%1011.1 hPa

Link to 5 minute data for KUGN

Wind History from UGN (wind in knots)
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Last 24hrSW7Calm34543W4SW3Calm4SW7SW10
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1 day ago66N9
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2 days agoNW4NW5NW4N7
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G19
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N74N6

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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