Friday, March5, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Highland Park, 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 6:17AMSunset 5:47PM Friday March 5, 2021 7:45 AM CST (13:45 UTC) Moonrise 1:28AMMoonset 11:07AM Illumination 57% Phase: Waning Gibbous; Moon at 22 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
    EDIT      (on/off)   Help
LMZ740 Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 300 Am Cst Fri Mar 5 2021
Today..Northeast winds 10 to 15 kt becoming northwest after daybreak, then becoming northeast again early in the afternoon. Sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft by late morning.
Tonight..North winds 10 to 15 kt becoming northwest around 10 kt late in the evening, and then north late. Mostly clear. Waves 1 to 3 ft.
Saturday..North winds 10 to 15 kt becoming northeast in the afternoon. Sunny. Waves 2 to 4 ft.
Saturday night..Northeast winds 5 to 10 kt becoming southeast after midnight. Mostly clear. Waves 1 to 3 ft.
LMZ740 Expires:202103051615;;497746 FZUS53 KLOT 050900 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 300 AM CST Fri Mar 5 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>742-051615-


7 Day Forecast for Marine Location Near Highland Park, IL
   Hourly   EDIT   Help
location: 42.18, -87.81     debug


Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KLOT 051135 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 535 AM CST Fri Mar 5 2021

SHORT TERM. 205 AM CST

Through Sunday .

Meteorological Spring continues its quiet start through the weekend. Lake breeze potential and how much of an area near the lake this wind shift keeps cooler is really the only item of note. Temperatures will be a tad above normal and start making larger strides above early March climatology on Sunday.

High pressure of 1030 mb is centered over Wisconsin and sprawled into northwest and north central Illinois this morning. Maintained to the immediate east of this feature is boundary layer flow from the northwest today. Forecast profiles from high-resolution models do vary on the mixed boundary layer depth this afternoon, with the NAM more pronounced and keeping a lake breeze out of northeast Illinois while the HRRR is much less so and allows intrusion to a little west of I-294. Last warm season the HRRR was at times too aggressive on lake breezes and even its profiles indicate ~10 kt of flow today, which usually retards a lake breeze to near the shore. So have kept the turn of the winds for Chicago to late afternoon with highs mid 40s, while northwest Indiana will have more of an onshore component through the day with highs upper 30s to possibly lower 40s. Some upper 40s are likely in the southern CWA. Patchy shallow fog potential may be present again tonight over north central Illinois, but with little of it materializing this morning, don't see tonight being any more of a threat.

Through Saturday there will be little movement in the long wave pattern that is primarily held up by a stout sub-500 dam low at 500 mb over eastern Quebec. Northwest flow that has little acting on it to be ageostrophic will continue over our forecast area and and surface high pressure underneath. With a slight eastward inching of the high on Saturday, this will allow an onshore turn of the winds near the lake with higher confidence than today, and keep lakeside areas in the 30s.

Sunday will start to see movement in the mid/upper level pattern, with heights building and lower tropospheric warm advection. The 925 mb temperatures are forecast to warm from -1C to 3C in the morning to 5C to 9C by late day. The surface wind direction remains more south-southeast to due south, which typically does not mean temperatures racing away this time of year (like they may the following days), but at least jumping into the 50s for most locations. The exception will be near the lake in Illinois where the direction should provide some degree of cooling.

MTF

LONG TERM. 330 AM CST

Sunday Night through Thursday .

The new work week will be a continuation of the dry and increasingly mild conditions, with highs in the 60s a good bet on Monday and Tuesday. Our long quiet stretch then appears likely to come to an end in the Wednesday-Thursday timeframe, when at least isolated thunderstorms appear possible.

The synoptic pattern is a good one on Monday and Tuesday for unseasonable warmth, with strong positive mid-level height anomalies and persistent warm advection. At the surface, elongated troughing over the high Plains and expansive high pressure over the eastern CONUS will keep southwest to southerly winds elevated. The position of the surface high center over the southeast and ridging back across the Gulf states will block off moisture trajectories. Climo of progged 925 mb temps of +8 to +10C or a bit higher at peak heating on Monday-Tuesday supports highs in the lower to mid 60s. Monday will feature breezy southwesterly winds, becoming close to due south-southwesterly and increasing on Tuesday as the pressure gradient tightens. If there's less clouds, Tuesday could be a candidate for deeper mixing, meaning temps overperform a bit and dew points possibly underperform. With wind gusts up to or over 30 mph, extended dry pattern over areas that lost snow cover earliest could yield an elevated fire weather risk. Still a few days to monitor trends for this period.

The gusty southerly winds will increase through Tuesday night, likely keeping temps in the lower 50s, well above normal highs for the date. Both the GFS and ECMWF depict a plume of very steep mid-level lapse rates being advected eastward across our area. Have some low PoPs indicated overnight, which would be elevated warm advection showers. With such steep lapse rates, if parcels can overcome the very warm EML base at 700 mb, would spell a non- zero chance for isolated thunderstorms. We look to finally tap into better boundary layer moisture on Wednesday, with dew points getting to 50F or higher drawn northward by south-southwest winds gusting up to 30-40 mph. Despite mostly cloudy skies, very mild start and strong warm advection will support highs again in the low-mid 60s. While we look to be in the warm sector of troughing off to the west and northwest, some upper jet support could help scattered showers break out during the day.

Uncertainty increases in how things will evolve Wednesday evening- Thursday, but in a broad sense we should see surface cold front move into the area and then possibly stall out during Thursday as waves of energy interact with the front. PWATs of 150-250% of normal could set the stage for heavy rainfall, especially associated with any thunderstorms, which appear quite possible. With this period 6+ days out and plenty of time for changes, introduced a slight chance for thunderstorms Wednesday night- Thursday (I-80 and south for now on Thursday closer to boundary). Temperatures will cool down to the north of the boundary on Thursday, in particular near the lake if winds flip to out of the north and northeast. The active period should continue through Thursday night and early Friday, followed by much cooler conditions next weekend.

Castro

AVIATION. For the 12Z TAFs . 535 AM CST

Only items of note include: * Chance for lake breeze wind shift late afternoon-early evening, low confidence but a bit higher probability for MDW * North-northeast winds Sat. AM and a small chance for lower CIGs

High pressure will be in control of the local weather through Saturday. The surface high center will be just far enough northwest from Chicago plus decent mixing for 310-330 deg winds around 10 kt this afternoon. GYY's proximity to the lake should allow its winds to flop over to north-northeast around 19-20z. Main question/uncertainty is whether a lake enhanced wind shift can make it into MDW and ORD later today. Most guidance except the HRRR keeps winds northwesterly until early evening, and think the HRRR depiction of a backdoor boundary shifting winds at MDW and ORD to the northeast as early as mid afternoon is on the aggressive side. Recent RAP and NAM runs though do hint at shift to north or north-northeast trying to make it into MDW in 00z-01z timeframe. Confidence is low in the wind forecast, but expect that trends should emerge to increase confidence for subsequent updates.

Light to variable winds tonight should take on a north to northeast component Saturday morning as high pressure position and lake influence supports that. It's possible that some lower MVFR level strato-cu drifts in off the lake on Saturday morning, but currently think overall dryness of column should keep coverage low/few.

Castro

LOT WATCHES/WARNINGS/ADVISORIES. IL . None. IN . None. LM . None.

Visit us at weather.gov/chicago

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/NWSChicago www.twitter.com/NWSChicago www.youtube.com/NWSChicago


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WHRI2 - Waukegan Harbor, IL 13 mi106 min NW 2.9 G 7 25°F
FSTI2 17 mi106 min 29°F
OKSI2 21 mi106 min WNW 1.9 G 2.9 34°F
CHII2 - Chicago, IL 22 mi26 min NW 5.1 G 5.1 31°F 28°F
CNII2 25 mi31 min W 2.9 G 4.1 34°F 25°F
KNSW3 - Kenosha, WI 28 mi46 min W 9.9 G 12 25°F 1028.1 hPa (+0.0)
CMTI2 - 9087044 - Calumet, IL 34 mi46 min Calm G 1.9 1027.6 hPa (+0.4)

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
N15
G19
N14
G21
N13
G18
N11
N13
G16
N13
G16
N13
G18
N17
G21
N17
G21
N13
G17
N13
G18
N11
G17
N11
G18
N13
G19
N13
G16
N9
G13
NE9
G12
NE9
G12
N8
NE6
NE2
NW1
W2
W1
1 day
ago
SW5
G9
W5
G8
W3
E4
NE7
NE7
NE6
NE5
NE5
NE4
NE3
N3
N5
N7
N5
N5
N5
N3
NW5
G8
N8
G12
N11
G16
N8
G13
N11
G17
N16
2 days
ago
S9
S12
G16
S10
G16
S13
G18
S12
G19
SW14
G22
SW13
G19
SW9
G16
S14
G20
S9
G14
S8
G12
S8
G11
S8
G11
S6
G10
S9
G12
S10
G13
SW14
G18
S12
G17
S12
G17
SW8
G13
SW8
G11
SW7
G11
SW5
G8
SW5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL7 mi54 minN 08.00 miFair25°F22°F88%1029.3 hPa
Chicago, Chicago-O'Hare International Airport, IL15 mi55 minN 010.00 miA Few Clouds27°F21°F78%1029 hPa
Chicago/Waukegan Regional Airport, IL17 mi51 minW 36.00 miFog/Mist23°F19°F85%1029.6 hPa

Link to 5 minute data for KPWK

Wind History from PWK (wind in knots)
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hrN13
G20
N12
G23
NE15
G21
NE15
G23
NE11NE11
G18
NE11
G21
NE11NE13NE11N8N8N6N4CalmW3N5NW3CalmCalmNW3NW3NW3Calm
1 day agoW4NW53NW4NW8NW6NW8
G15
NW8NW10NW8NE5NE6N3N3CalmNE3NW3N4N7
G15
NE7
G15
NE6N8
G17
N11N11
G19
2 days agoS8S13S14
G23
SW14
G24
S12
G21
S13
G22
SW12
G22
SW11
G22
S15
G21
S11
G19
S11S11S9S9S8SW10SW10SW7S7SW6SW6W5W4W3

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of    EDIT
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.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.