Marine Forecasts

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7 Day Forecast for Marine Location Near North Chicago, IL

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Area Discussion for - Chicago, IL

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FXUS63 KLOT 132327 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 627 PM CDT Thu Aug 13 2020

SHORT TERM. 131 PM CDT

Through Friday night .

Quiescent pattern continues through the end of the week here with the region hanging out in the more subsident regime immediately north of a slow-moving upper low across southern Illinois. Can't rule out some light/patchy fog tonight, but this would mainly be for locales west of Chicago where dewpoints remain the highest. No formal mention in the gridded products at this time, however, given the anticipated localized and ephemeral nature of any fog development.

Tomorrow looks much the same as today, with high temperatures around a degree or two warmer than today. Can't rule out a stray shower developing in our far southeastern locales as the upper low starts to jog a bit more northeastward, but any chances seem to be under 10% or so with no mention in the gridded forecast. A cold front will approach the region from the northwest late Friday night, but any associated shower and thunderstorm chances look to hold off until later on Saturday.

Carlaw

LONG TERM. 211 PM CDT

Saturday through Thursday .

Overall the period will feature fairly quiet weather. The only exception to this is the continued chance for a period of showers and thunderstorms late Saturday through Saturday evening. Additionally, as mentioned in previous discussions, we will have to monitor the potential for dangerous swimming conditions on Lake Michigan early next week due to some enhanced northerly winds down the lake.

Saturday will be another warm day across the area, with temperatures likely to top out well into the 80s. A surface cold front, associated with a potent area of low pressure over northern Ontario, is expected to shift eastward over the area sometime during the day. As it approaches, a warming prefrontal airmass along with some pooling of higher dew points near the frontal zone on Saturday afternoon could support a corridor featuring MLCAPE values in excess of 1,000 J/KG. Therefore, there is some concern for convective development with the front over the area Saturday afternoon. However, there are some signals that the better upper support from an approaching mid-level disturbance and the exit region of an upper jet may lag the frontal boundary and the better diurnal timing some, thus possibly limiting the areal coverage of storms over the area during the day. While questions still remain with the extend of storms late Saturday, the chances continue, with a favored timing centered around the Saturday afternoon through early evening. The threat of severe storms with this activity will not be zero, but limited deep layer shear and the possibilities for a lower areal coverage of storms should limit the extent of severe storms over the area.

Behind the cold front, northwest winds will take over and a secondary front looks to push over the area sometime late in the weekend. If that timing holds, Sunday is likely to be dry CWA- wide. Behind the secondary front, highs look to drop into the mid-upper 70s Monday and Tuesday. As for the northerly winds, the duration of them into especially northwest Indiana may be enough for a rip current threat and possibly into Cook County as well during Sunday into Monday.

We maintain a dry forecast for next week. The northwest flow may not be void of disturbances, and 00Z long range guidance did show hints of a low amplitude feature passing nearby or overhead in the Tuesday-Wednesday period, but confidence is much too low to deviate from a dry forecast at this juncture.

KJB/MTF

AVIATION. For the 00Z TAFs .

627 PM . No forecast concerns through the period. Easterly winds to 10kts will diminish this evening . possibly becoming light and variable. Winds may favor a light northerly direction for ord/mdw overnight. Winds will turn back easterly Friday morning and increase to 10kts Friday afternoon. cms

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

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
WHRI2 - Waukegan Harbor, IL	1 mi	79 min	NE 8 G 9.9	75°F
45187	10 mi	39 min	ENE 5.8 G 7.8	76°F	75°F	1 ft
45174	16 mi	19 min	NNE 7.8 G 7.8	75°F	75°F	1 ft	1017.6 hPa (+0.0)	68°F
KNSW3 - Kenosha, WI	17 mi	79 min	NNE 8.9 G 8.9	76°F			1017.6 hPa (-0.3)
CHII2 - Chicago, IL	32 mi	29 min	NNE 8.9 G 9.9	76°F				71°F
OKSI2	32 mi	139 min	ENE 5.1 G 7	76°F
CNII2	35 mi	34 min	NNE 6 G 12	73°F				66°F
CMTI2 - 9087044 - Calumet, IL	45 mi	49 min	N 4.1 G 8	75°F			1017.4 hPa	69°F
45007 - S MICHIGAN 43NM East Southeast of Milwaukee, WI	46 mi	29 min	NNE 9.7 G 12	74°F		1 ft	1017.9 hPa	71°F
MLWW3 - Milwaukee, WI	46 mi	39 min	NE 2.9 G 4.1	74°F

Wind History for Calumet Harbor, IL

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8 PM

9 PM

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12 AM

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Last 24hr

NE7

E7

E8 G11

NE7

NE6

E3

E5 G8

NE2

NE4

E3

E3 G6

SE2

NE1

NE3

NE3

N6

NE6

NE4

NE7

NE7

N7 G10

N7

N7

N6 G11

1 day ago

NE4

NE4

E2

SE1

SW1

SW2

SW2

SW1

SW1

S1

W1

NW1

N4

NE6

NE7

NE6

NE5 G8

NE7

N10

N8 G11

NE9

NE7 G10

NE7

NE4 G7

2 days ago

S7 G10

W3 G9

W3 G7

SW5 G8

SW5

SW5 G8

SW5

SW5 G8

SW5 G9

SW4

SW3

W2

N7

N7 G10

N4 G8

N7 G10

N6 G9

N6 G9

N7

NE7

NE7

NE6

NE4 G7

NE5

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Chicago/Waukegan Regional Airport, IL	6 mi	24 min	N 0	10.00 mi	Fair	72°F	63°F	73%	1017.1 hPa
Kenosha, Kenosha Regional Airport, WI	18 mi	26 min	ENE 4	10.00 mi	Fair	71°F	61°F	71%	1018.2 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL	18 mi	27 min	NE 3	10.00 mi	Fair	77°F	64°F	66%	1018 hPa

Link to 5 minute data for KUGN

Wind History from UGN (wind in knots)

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Last 24hr

Calm

Calm

Calm

E3

Calm

Calm

Calm

Calm

N3

Calm

Calm

Calm

NE5

E6

E6

5

E6

E7

E7

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NE7

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NE4

Calm

1 day ago

SW3

Calm

Calm

Calm

Calm

Calm

W3

Calm

W5

NW5

NW3

NW3

Calm

4

S5

SE7

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E8

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NE5

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2 days ago

W4

6

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3

W6

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3

W4

NW4

N4

N5

NW4

3

NW3

NE3

Calm

E5

E8

E5

SE6

E6

SE6

SE3

Calm

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Tide / Current Tables for

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Tide / Current Tables for

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Weather Map

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GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for Chicago, IL (21,6,7,8)

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Ground Weather Radar Station Chicago, IL

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