Friday, July20, 2018 L-36.com


Marine Weather and Tides
Highland Park, IL

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:31AMSunset 8:23PM Friday July 20, 2018 3:51 AM CDT (08:51 UTC) Moonrise 2:09PMMoonset 12:40AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 323 Am Cdt Fri Jul 20 2018
.small craft advisory in effect until 10 am cdt this morning...
Today..South winds to 30 kt becoming southwest 15 to 20 kt. Showers likely and a chance of Thunderstorms. Waves 3 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
Tonight..West winds 10 to 20 kt. Slight chance of waterspouts. Showers likely and a chance of Thunderstorms. Waves 1 to 3 ft.
Saturday..North winds 10 to 20 kt. Chance of waterspouts. Showers likely and slight chance of Thunderstorms. Waves 2 to 4 ft building to 3 to 5 ft in the afternoon.
Saturday night..North winds 15 to 20 kt becoming northeast. Chance of waterspouts. Chance of showers and slight chance of Thunderstorms. Waves 3 to 5 ft.
LMZ740 Expires:201807201515;;758855 FZUS53 KLOT 200823 NSHLOT NEARSHORE MARINE FORECAST National Weather Service Chicago/Romeoville IL 323 AM CDT Fri Jul 20 2018 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>742-201515-

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 200836
afdlot
area forecast discussion
national weather service chicago romeoville, il
336 am cdt Fri jul 20 2018

Short term
335 am cdt
through tonight...

main focus for the short term forecast period will continue to be
impacts of an unseasonable upper low slowly tracking across the upper
mississippi valley and upper midwest.

Early this morning, the center of the upper low was located over
sern minnesota. The system is vertically stacked with the associated
sfc low right under the upper low, with a warm front extending from
nwrn il nr rockford to the champaign area. A series of vort maxs
rotating around the SRN periphery of the upper low will keep chances
for shra tsra across the region until the system moves off to the
east. Exact timing and coverage of TS will be low confidence
through the period, with scattered low-topped convection and
isolated stronger storms possible. Given pwats in excess of 1.6
inches expected to remain in place, locally heavy rainfall will be
likely with some of the heavier showers and storms. Temperatures
will be well below normal today, under mostly cloudy-cloudy skies
with highs only in the lower to middle 70s across much of the cwa.

The far sern portions of the cwa, generally south an east of a ling
from gary, in to pontiac, il could remain in low level sly-swly flow
today long enough to allow temps into the upper 70s, but as the
system slowly moves ewd, low level flow across the region will
gradually veer to wly-wnwly.

Long term
335 am cdt
Saturday through Thursday...

the unseasonably cool and cloudy conditions will continue through
the weekend as the upper low very slowly tracks ewd. The longer
range guidance is in relatively good agreement on the general track
and ewd progression of the system. As the upper low tracks to
southern lake michigan by Saturday morning, upper level flow will
veer from wly to nwly aloft, setting up deep layer cold advection
and a track for weak impulses to cross the cwa. This pattern will
continue into early next week as the upper low settles over the
upper ohio valley from Sunday afternoon through Monday, with
temperatures remaining below normal, only in the middle 70s on
Saturday. A ridge axis extending from an expansive upper high
centered over the four corners region will begin to approach the
region Sunday, bringing minor height rises and, consequently,
slightly higher temps for Sunday. However, with highs generally in
the upper 70s to around 80 f, and cooler near the lake in onshore
flow, temperatures will still be 5 to 10 degrees below normal with
continued chances for scattered showers and isolated thunderstorms.

By late Sunday or early Monday, the center of the upper low should
be far enough east, with upper ridging continuing to build across
the region, that temperatures should trend back to near seasonal
normal levels for Tuesday into mid-week, with minimal chances for
pcpn.

Aviation
For the 06z tafs...

a slow moving upper low traversing the region will bring multiple
chances for showers and thunderstorms through the period, along
with lowering ceiling heights.

Precipitation: scattered showers and thunderstorms are expected
through the period, though there do appear to be a couple windows of
better chances for precipitation at the terminals. The first
window will be 06z through 08-09z overnight. A line of
thunderstorms is currently lifting across north central illinois
and a few isolated showers storms are possible farther south over
or near the chicago area terminals. Meanwhile, a shortwave trough
evident on water vapor imagery digging across north central iowa
late this evening is expected to push into northern illinois mid
to late Friday morning and will help to increase precip coverage.

Instability appears best during the late morning hours as this
initial wave moves over the area, and will introduce a vcts into
the forecast this issuance. If confidence in scattered storms
increases further, may have to add a tempo for tsra.

Ceilings:VFR conditions are in place across most of northern
illinois and northwest indiana late this evening outside the
influence of precip, but closer to the low center, more widespread
ifr and lower MVFR ceilings are present across northeast iowa
and southern minnesota. Guidance suggests these lower ceilings
will gradually build southeast across the terminals. Conceptually,
not favoring the lowest solutions given the low center track to
our north with moderate southwest flow locally.

Winds: south to south-southeast winds are in place late this
evening but will veer to the south-southwest by the pre-dawn
hours Friday. Winds will continue to gradually veer through the
day, becoming southwest through the afternoon and eventually
northwest by late evening or overnight. Winds will be gusty at
times, particularly during the afternoon hours Friday when gusts
into the low 20 kt range are expected.

Bmd

Marine
329 am cdt
moderately strong south to southeast flow with gusts to 30 kt is
occurring early this morning across portions of lake michigan
ahead of an approaching low. The low, over far southeast minnesota
early this morning, will slowly track east across southern
wisconsin this afternoon and across the southern third of lake
michigan overnight. Split the open waters (glflm) forecast into
three zones to try to better detail the winds across the lake
during the low passage.

Several models are hinting at winds over the far southern end of
lake michigan staying moderately strong as they veer to the
southwest late this morning into the afternoon. With michigan city
already gusting mid 20kt range and expectations for winds to stay
elevated through mid late afternoon, will hoist a small craft
advisory for the indiana nearshore zones through late afternoon.

By this afternoon, expect the illinois zones to be slightly
weaker with respect to wind speeds later today, so will maintain
the advisory currently in place which expires mid morning. The
passage of the low overnight into the weekend will support
additional chances of showers and thunderstorms as well as the
chance for waterspouts.

Bmd

Lot watches warnings advisories
Il... Beach hazards statement... Ilz006-ilz014 until 10 am Friday.

In... None.

Lm... Small craft advisory... Il nearshore waters until 10 am Friday.

Small craft advisory... In nearshore waters until 5 pm Friday.

Visit us at http: weather.Gov chicago (all lowercase)
follow us on facebook... Twitter... And youtube at:


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
45174 9 mi21 min S 16 G 23 76°F 72°F4 ft68°F
WHRI2 - Waukegan Harbor, IL 13 mi71 min S 19 G 27 76°F
FSTI2 17 mi111 min SSW 25 77°F
CHII2 - Chicago, IL 22 mi31 min S 25 G 29 77°F 66°F
45177 22 mi111 min 73°F1 ft
CNII2 25 mi21 min S 8.9 G 18 76°F 62°F
KNSW3 - Kenosha, WI 28 mi51 min S 14 G 18 69°F 1005.1 hPa (-2.4)
JAKI2 30 mi111 min SSW 13 G 22 78°F
CMTI2 - 9087044 - Calumet, IL 34 mi33 min S 12 G 19 76°F 1006.4 hPa65°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
-12
PM
-12
PM
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
Last
24hr
E5
NE4
NE5
E4
E5
E6
SE12
G17
SE13
G17
SE13
G16
S13
G18
S11
G17
SE10
G16
S9
G16
SE8
G15
SE11
G14
SE9
G13
SE9
G15
SE9
G12
S11
G19
SE10
G16
SE11
G17
S11
G19
1 day
ago
N6
NE5
N5
G8
NE7
NE6
N7
G10
NE9
NE6
G10
NE9
NE7
N8
G11
NE7
G11
N6
G11
N7
G11
NE7
G10
N4
G8
N3
G6
N3
NE5
NE5
NE5
NE6
NE5
G8
NE4
2 days
ago
W3
NW4
NW7
G11
NW6
G10
NW7
N7
G10
N11
G15
N11
G15
N11
N11
G14
NE10
G13
N10
G14
N11
N9
G13
N10
G14
N9
G12
N9
G12
N8
G11
N8
N9
G12
N8
N6
G10
N7
G10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL7 mi59 minS 17 G 2310.00 miA Few Clouds77°F64°F66%1005.9 hPa
Chicago, Chicago-O'Hare International Airport, IL15 mi60 minS 9 G 1910.00 miMostly Cloudy76°F63°F64%1005.5 hPa
Chicago/Waukegan Regional Airport, IL17 mi56 minS 1110.00 miFair75°F66°F74%1003.9 hPa

Wind History from PWK (wind in knots)
4
AM
5
AM
6
AM
7
AM
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
Last 24hrCalmNE3CalmCalmE5SE6SE7SE5S11S13S12
G22
S12S10S12SW8S6S10SE7S9SE16
G20
S12SE14
G20
S20
G26
S17
G23
1 day agoCalmN3CalmCalm4E76NE7E9E6E8NE9E8E7NE8E6E4CalmCalmCalmCalmCalmCalmCalm
2 days agoNW5NW5N3NW4N5NE6NE9N7NE7NE8NE9NE10NE10E9NE9NE9NE9NE6NE4NE3CalmCalmCalmCalm

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES 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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (4,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Chicago, IL
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.