Monday, March25, 2019 L-36.com


Marine Weather and Tides
Evanston, 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 6:43AMSunset 7:09PM Monday March 25, 2019 7:23 PM CDT (00:23 UTC) Moonrise 12:00AMMoonset 9:48AM Illumination 75% Phase: Waning Gibbous; Moon at 20 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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LMZ741 Expires:201903260315;;331949 Fzus53 Klot 251957 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 257 Pm Cdt Mon Mar 25 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>742-260315- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 257 Pm Cdt Mon Mar 25 2019
.small craft advisory in effect through late tonight...
Tonight..Northeast 15 to 25 kt easing to 10 to 20 kt overnight. Clear. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft late.
Tuesday..East winds 10 to 15 kt. Sunny. Waves 2 to 4 ft.
Tuesday night..Southeast winds 5 to 10 kt becoming south 10 to 15 kt after midnight. Mostly clear. Waves 1 ft or less.
Wednesday..South winds 10 to 20 kt. Sunny. Waves 1 to 3 ft.
LMZ741


7 Day Forecast for Marine Location Near Evanston, IL
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location: 42.03, -87.69     debug


Area Discussion for - Chicago, IL
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Fxus63 klot 252350
afdlot
area forecast discussion
national weather service chicago romeoville, il
650 pm cdt Mon mar 25 2019

Short term
207 pm cdt
through Tuesday night...

overall, it will be a fairly quiet period of weather through the
period.

Surface high pressure will settle over the area tonight into
Tuesday. With clear skies and light winds, expect a chilly night
tonight, with lows dropping into the 20s. Light easterly winds
will continue on Tuesday with the surface high nearly overhead.

However, wind speeds will likely increase a bit in the afternoon
near the lake as a lake breeze push occurs. Highs on Tuesday will
be a bit warmer than today, especially for inland areas where
temperatures will warm into the mid to upper 40s. Colder
conditions in the 30s are expected near the lake.

Kjb

Long term
255 pm cdt
Wednesday through Monday...

Wednesday: dry weather will continue as high pressure exits to the
east. Increasing SW winds will advect in a milder air mass. Expect
high in the mid 50s amidst breezy conditions and mostly sunny skies.

Wednesday night through Thursday night: a deep trough over southern
canada and an associated surface low will push a cold front into the
western great lakes by Wednesday night. The front will ultimately
stall somewhere across central illinois by Thursday night. A series
of weak impulses traversing over this boundary will support sporadic
chances of showers with an outside chance of an isolated embedded
thunderstorm. Overall, most of the period will be dry across the
area, though the highest chances of showers will be later Thursday
night.

Friday through Saturday: focus then shifts to the potential for a
couple rounds of potentially moderate to heavy rain across the cwa.

The focus for heavier rain will be dependent on the location of the
stalled surface low-level boundary. This boundary should remain
across the southern CWA or south of the CWA Friday before shifting
northward into the central CWA as the surface low tracks NE across
the area Friday night into Saturday. Heavy rain potential will be
enhanced by a few factors:
1) high pwat anomalies for late march of around two standard
deviations and averaging near the climatological maximum values
based off sounding climatology at dvn and ilx.

2) stalled frontal boundary draped west to east across the cwa.

3) notable low-level moisture transport in response to increasing
sw flow ahead of low pressure in the central great plains,
particularly Friday afternoon and night.

Given the recent river flooding across the NW half of the cwa, there
is increased concern of heavy rainfall occurring across those river
basins. Long-range guidance, including forecast ensembles, continue
to shift the heavy rain axis north and south from run to run.

However, it is becoming more evident that the axis of heavy rain
will affect at least portions of the cwa, with the period of
heaviest rain with possible a few embedded thunderstorms occurring
Friday afternoon into Saturday morning. Consensus forecasts produce
widespread 1" to locally 2"+ within the cwa. Continue to monitor the
latest forecasts and statements for the latest details.

Saturday night through Monday: high pressure will settle behind the
late-week system, resulting in dry conditions into early next week.

Unseasonably cold conditions can also be expected during this time,
with highs in the upper 30s to mid 40s on Sunday, coldest near lake
michigan.

Kluber

Hydrology
A front will stall over the region late in the week, which will
result in a couple bouts of moderate to heavy rainfall from
Thursday night through Saturday. Isolated thunderstorms are also
possible. Significant rainfall totals of one inch to in excess of
two inches are possible. Despite it being about five days from the
start of this potential event, model guidance is in very good
agreement on area wide rainfall totals of at least one inch. Given
that the air mass over the region will be unseasonably moist and
supportive of efficient rainfall rates, pattern recognition of
past similar heavy rainfall setups suggest that event totals of
2.5" or higher will be possible in spots.

It's too early to be able to pinpoint specifics for which areas
will receive the highest rainfall totals, but even the ensemble
baseline of 1"+ is concerning for renewed sharp river and stream
rises and lowland flooding. This includes the most impacted
basins the past few weeks, the rock, pecatonica and fox, with
moderate flooding still ongoing along portions of these rivers.

Soil moisture remains above normal for late march, so increased
runoff will be a concern with respect to river flooding area wide.

An esf hydrologic outlook has been issued to highlight the
concerns for this potentially significant rainfall event.

Castro

Aviation
For the 00z tafs...

dry andVFR conditions expected this forecast period as high
pressure builds across the region. The stronger northeast winds in
place this evening will diminish tonight into Tuesday morning. A
lake influence will assist with a slight increase in speed Tuesday
afternoon, while winds remain an east northeast direction.

Rodriguez

Lot watches warnings advisories
Il... None.

In... None.

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

Visit us at http: weather.Gov chicago (all lowercase)
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSTI2 4 mi144 min N 30 33°F
CHII2 - Chicago, IL 10 mi34 min N 21 G 24 34°F 25°F
CNII2 13 mi24 min NNW 8.9 G 19 33°F 24°F
JAKI2 18 mi144 min N 12 G 28 36°F
CMTI2 - 9087044 - Calumet, IL 22 mi36 min 34°F 1026.2 hPa23°F
WHRI2 - Waukegan Harbor, IL 24 mi44 min N 12 G 18 33°F
BHRI3 - Burns Harbor, IN 39 mi44 min N 11 G 14 35°F 1026.4 hPa
KNSW3 - Kenosha, WI 39 mi84 min NNE 15 G 17 33°F 1027.4 hPa (+0.3)
MCYI3 - Michigan City, IN 46 mi34 min N 27 G 29 35°F 23°F

Wind History for Calumet Harbor, IL
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N6
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G11
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago / Wheeling, Pal-Waukee Airport, IL12 mi32 minNNE 10 G 1810.00 miFair35°F12°F40%1028.7 hPa
Chicago, Chicago-O'Hare International Airport, IL12 mi33 minN 1310.00 miA Few Clouds36°F8°F31%1027.6 hPa
Chicago, Chicago Midway Airport, IL17 mi31 minN 1210.00 miA Few Clouds36°F10°F34%1027.9 hPa

Wind History from PWK (wind in knots)
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Last 24hrN11
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NE12N10
G18
1 day agoE4SE3SE4CalmCalmSE3CalmCalmCalmS3CalmCalmCalmSE3CalmS3S7S4S6CalmN5N5NE15
G25
NE12
G20
2 days agoNE5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4534355SW9S8E4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (20,4,5,8)
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Ground Weather Radar Station Chicago, IL
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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.