Saturday, July4, 2020
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Marine Weather and Tides
Jacksonville, IL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:37AMSunset 8:33PM Saturday July 4, 2020 7:01 AM CDT (12:01 UTC) Moonrise 7:27PMMoonset 3:56AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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7 Day Forecast for Marine Location Near Jacksonville, IL
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location: 39.73, -90.23     debug


Area Discussion for - Central Illinois, IL
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FXUS63 KILX 041039 AFDILX

Area Forecast Discussion National Weather Service Lincoln IL 539 AM CDT Sat Jul 4 2020

SYNOPSIS. Issued at 239 AM CDT Sat Jul 4 2020

High pressure will continue to bring summertime heat to central and southeast Illinois, for the holiday weekend. Highs will reach the lower 90s today and Sunday, while dry weather persists.

SHORT TERM. (Today through Sunday) ISSUED AT 239 AM CDT Sat Jul 4 2020

Upper ridge axis extends from west TX up through the western Great Lakes and into central Canada early this morning. At the surface, high pressure had moved very little from 24 hours ago, with a 1018 mb ridge over the western Great Lakes. Light northeast trajectories provided moderate humidity levels for much of the area where dewpoints were in the 60s, though where rains have fallen in recent days lower 70s dewpoints were more common southwest of a Jacksonville to Olney line. Low dewpoint depressions and light winds resulted in patchy light fog over the far southwest CWA.

Little change in the overall pattern today as the ridging at the surface and aloft provides hot and dry weather. Highs should reach the lower 90s and with mid/upper 60s dewpoints peak heat indices will be in the mid 90s. Pops remain below mentionable levels due to a capping inversion at 700 mb. This appears weaker over eastern IL, but CAMs suggest any isolated afternoon activity would be farther east into Indiana. Tonight will feature mainly clear skies and lows near 70. More of the same is expected on Sunday as the surface ridge remains over the Great Lakes. Highs may be a degree or two warmer, so with modest humidity levels heat indices to again peak in the mid 90s. Just an outside chance for an isolated storm primarily over the southern CWA.

LONG TERM. (Monday through Friday) ISSUED AT 239 AM CDT Sat Jul 4 2020

The main story through the extended forecast will be persistent heat, with increasing humidity as we head through the first half of the week. Highs should generally remain in the lower 90s with possibly a few mid 90s through the period. A higher dewpoint pool to our southwest will advect in as the surface ridge currently over the Great Lakes shifts east, allowing south to southwest low level flow to develop. This will make lower 70s dewpoints more common beginning on Monday. Mid/upper 90s afternoon heat indices will be a daily occurrence through the week.

While widespread rain chances continue to look fairly low, there are several opportunities for at least scattered storms during the work week. Separate upper waves will flatten the ridge on Monday and Tuesday, and this could produce enough mid level cooling this far south the erode the cap and allow isolated to scattered, mainly afternoon convection. In the wake of these waves the mid level flow temporarily turns northwest, and this may open up a better chance for scattered storm clusters Wednesday and Thursday. Due to uncertainty in coverage pops were capped at 40 percent through the extended portion of the forecast.

AVIATION. (For the 12Z TAFS through 12Z Sunday morning) Issued at 539 AM CDT Sat Jul 4 2020

High pressure over the Great Lakes will keep light northeast flow in place through tonight. VFR skies will prevail with scattered diurnal cu, otherwise passing cirrus.

ILX WATCHES/WARNINGS/ADVISORIES. NONE.

SYNOPSIS . 25 SHORT TERM . 25 LONG TERM . 25 AVIATION . 25


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Municipal Airport, IL3 mi67 minE 45.00 miFog/Mist67°F66°F99%1016.3 hPa

Link to 5 minute data for KIJX

Wind History from IJX (wind in knots)
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Last 24hrNE5NE4NE6E6NE8E7N5NE6CalmSE6N4N3NW3CalmN5CalmCalmCalmCalmE4CalmE4E3E3
1 day agoCalmCalmCalmE3CalmE6NE4E5E5E12E9NE7NE5CalmCalmE3E4CalmCalmNE5E6NE5E6E3
2 days agoSE4E8CalmSE5CalmCalmE4CalmW5CalmW6NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 Central Illinois, IL (8,2,3,4)
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Ground Weather Radar Station Central Illinois, 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 numerous 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.