Friday, March22, 2019 L-36.com


Marine Weather and Tides
North Riverside, IL

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:49AMSunset 7:06PM Friday March 22, 2019 7:49 PM CDT (00:49 UTC) Moonrise 9:14PMMoonset 8:07AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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
LMZ741 Expires:201903230300;;765436 Fzus53 Klot 222109 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 409 Pm Cdt Fri Mar 22 2019 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>742-230300- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 409 Pm Cdt Fri Mar 22 2019
.small craft advisory in effect through late tonight...
Tonight..Northeast winds 20 to 25 kt diminishing to 5 to 10 kt by morning. Clear. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
Saturday..West winds 5 to 10 kt becoming southeast 10 to 15 kt in the afternoon. Sunny. Waves 2 to 4 ft subsiding to 1 to 3 ft in the afternoon.
Saturday night..South winds 10 to 15 kt. Slight chance of rain after midnight. Waves 1 ft or less.
Sunday..Southeast winds 5 to 10 kt becoming east in the afternoon. Rain likely. Waves 1 ft or less.
LMZ741


7 Day Forecast for Marine Location Near North Riverside, IL
   Hourly   EDIT   Help
location: 41.84, -87.82     debug


Area Discussion for - Chicago, IL
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klot 222325
afdlot
area forecast discussion
national weather service chicago romeoville, il
625 pm cdt Fri mar 22 2019

Short term
241 pm cdt
through Friday night...

a cold front continues to sag south across the ohio valley this
afternoon leaving breezy and cool conditions across much of the
midwest. Meanwhile, high pressure analyzed over the northern great
plains and upper midwest is progged to build across northern
illinois and northwest indiana tonight. Calm winds and clear skies
under the influence of the high will set the stage for favorable
radiational cooling conditions overnight. Temperatures are
expected to fall into the mid 20s outside the urban heat island
of chicago, which may hold onto upper 20s. Dew points this
afternoon have mixed into the mid 20s, so we'll have a way to go
for fog development, but wouldn't be surprised to see at least
some patchy fog tonight in low lying and fog prone areas.

Fair weather is expected on Saturday as center of high pressure
slides to our east and a modest south wind sets up over the area.

925mb temps are progged to be 2-4c warmer tomorrow which should
translate down to the surface resulting in temps a few degrees
warmer tomorrow despite a colder start to the day. In addition,
south synoptic flow will impede the inland progress of an
afternoon lake breeze, so the lake cooling will be much less
extensive tomorrow. The Saturday afternoon lake breeze will make
the best inland progress across northern cook county and lake
county (il), but will likely struggle in northwest indiana with
opposing synoptic flow. Anticipate highs in the low to mid 50s
away from the lake with 40s near the lake.

Deubelbeiss

Long term
307 pm cdt
Sunday through Friday...

main concern for the short term forecast period will be the next
significant chance for precipitation early Sunday into early Monday.

The high amplitude, short wavelength progressive pattern will
continue to gradually transition to a broad long wavelength, low
amplitude pattern by early next week. The longer term guidance
remains consistent with the next chance for significant pcpn
expected for early Sunday morning through early Monday morning. The
responsible feature is a southern pacific short wave moving through
the southern rockies as of Friday afternoon. The long range
guidance has maintained relatively good agreement with the
track timing strength of the system for the past few runs, so
confidence is relatively high for pop wx trends associated with this
system. The general trend should be for the main short wave to
transition from a closed low and weaken into an open wave as it
crosses the central plains Saturday night and into early Sunday. The
short wave should eventually get absorbed into a broad, deep upper
low centered over northern quebec. At the time of pcpn onset early
Sunday morning, temperatures should be high enough to support all
rain and with strengthening warm moist advection in advance of the
system, temperatures should reach into the upper 40s to lower 50s,
except cooler near the lakefront, with dewpoints in the lower 40s.

Longer range guidance is still suggesting pwats of 0.75 to 1.0" with
some positive bl CAPE and broad isentropic lift poking into, at
least, the southern portions of the cwa. Given the good consistency
in the positioning of the instability axis, have added a slight
chance of thunder with this system, for the far southern portions of
the CWA for Sunday evening. However, should the track of the sfc
low be shunted to a more southerly track by a strong sfc high over
central canada, then any thunder potential would be more confined to
the south. Also, QPF remains a concern for the portions of the rock
and pecatonica river basins that have been impacted by recent
significant flooding. Latest river stage forecasts still suggest
that many locations on these rivers should drop below flood stage
Monday or Tuesday. While there remains some uncertainty to the qpf
with this system, there are indicators that there could be enough
rainfall to delay locations dropping below flood stage or, at least,
slow down the falling trends on the rock and pecatonica rivers.

Interests along these rivers should monitor forecast updates. As
the system passes off to the east early Sunday, colder air should
filter back into the region, allowing for a transition from rain to
a rain snow mix early Monday morning as temperatures drop into the
lower 30s for the northern portions of the cwa.

High pressure will build back across the region on Monday and then
quickly slide to the east on Tuesday. Upper level ridging with
veering low mid level flow will then help a warming trend through
mid week, with above normal temps possible.

Aviation
For the 00z tafs...

expect dryVFR conditions across the terminals this period.

Scattered CU still in place early this evening will diminish, with
only high clouds expected for the remainder of the forecast
period. The steady north northeast winds this evening will
diminish, with winds likely becoming variable for much of the
overnight hours. Expect winds to slowly increase out of the south
southwest Saturday morning, then becoming more southerly for the
remainder of the day. A lake breeze will likely develop and at
this time, expect it to only impact gyy and turn the winds to the
northeast. It's possible that this lake breeze reaches ord and mdw
Saturday afternoon, but confidence is low at this time. If it
were to reach ord and mdw, the winds would become more east
southeast.

Rodriguez

Lot watches warnings advisories
Il... None.

In... None.

Lm... Small craft advisory... Nearshore waters
until 4 am Saturday.

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
FSTI2 13 mi109 min NNE 12 34°F
CHII2 - Chicago, IL 14 mi29 min N 11 G 11 35°F 28°F
JAKI2 14 mi109 min NNE 9.9 G 16 35°F
CMTI2 - 9087044 - Calumet, IL 17 mi31 min 33°F 1023.1 hPa27°F
WHRI2 - Waukegan Harbor, IL 36 mi69 min NE 9.9 G 12 34°F
BHRI3 - Burns Harbor, IN 38 mi69 min N 6 G 8 34°F 1024 hPa
MCYI3 - Michigan City, IN 49 mi29 min N 23 G 24 34°F 27°F

Wind History for Calumet Harbor, IL
(wind in knots)    EDIT      (on/off)   Help
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
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last
24hr
SW4
G8
SW4
SW3
SW6
SW5
SW4
G7
SW4
G7
W4
W3
G7
W6
G10
NW6
G9
NW10
G17
NW11
G15
NW10
G16
NW13
G17
NW8
G14
N12
G18
N14
G18
N11
G17
N16
N15
N13
G19
N9
G15
N9
G14
1 day
ago
SW4
S3
S3
SW7
G10
NW4
G9
W1
W3
W5
G9
NW5
G8
W4
G7
NW7
G11
NW9
G12
NW12
G20
NW13
G19
NW12
G20
NW13
G21
NW11
G17
NW11
G16
N6
G13
N5
G10
N2
E2
W4
G8
W9
G16
2 days
ago
S6
G9
S3
S3
S4
SE4
S5
G8
S6
G9
S3
G7
SW6
G9
S8
S12
G18
S4
S6
G11
S7
S11
S9
G14
S15
G19
S11
G16
S9
G13
S8
G11
S5
G8
SW6
G9
SW4
SW4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago Midway Airport, IL5 mi56 minNE 1110.00 miA Few Clouds35°F24°F64%1024.4 hPa
Chicago, Chicago-O'Hare International Airport, IL11 mi58 minENE 910.00 miA Few Clouds35°F25°F67%1023.9 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL19 mi57 minNE 610.00 miFair36°F24°F62%1024.6 hPa
Lewis University Airport, IL22 mi74 minENE 1210.00 miFair38°F28°F67%1023 hPa
Chicago / West Chicago, Dupage Airport, IL24 mi57 minE 810.00 miFair38°F26°F62%1023.4 hPa

Wind History from MDW (wind in knots)
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
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
Last 24hr--SW7W7W8W8W7W5NW8NW8NW7N11N9N10N10NE17
G25
NE18
G23
N17
G24
NE15
G23
NE13NE12
G20
NE13NE12NE10NE11
1 day agoS5S7SW4NW8NW8NW13NW9NW10NW11N11NW12N13N15
G23
N9N10N11N8N7NW8NW9W7W11W10W7
2 days agoS5S5S6S5S6S7SW5SW4SW9SW10
G19
S7S10S8S10
G20
S9S11
G20
S13
G25
SW8SW10SW9SW8SW7SW6SW5

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 Midwest    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
Wind Forecast for Chicago, IL (20,4,5,8)
      (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.