Friday, July19, 2019 L-36.com


Marine Weather and Tides
Jacksonville, IL

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:46AMSunset 8:27PM Thursday July 18, 2019 11:17 PM CDT (04:17 UTC) Moonrise 8:52PMMoonset 6:16AM 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
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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 190134
afdilx
area forecast discussion
national weather service lincoln il
834 pm cdt Thu jul 18 2019

Update
Issued at 834 pm cdt Thu jul 18 2019
much of the afternoon clouds have faded away, though there is a
band of altocumulus pushing southeast from the illinois river
valley at sunset. Dew points remain quite tropical, mid 70s to
around 80 degrees in some cases, and this should keep temperatures
quite warm though the night. Forecast was largely on track; the
only change was to update the zones to remove the heat index
mention for overnight.

Short term (this evening through Friday)
issued at 252 pm cdt Thu jul 18 2019
19z 2pm visible satellite imagery shows an outflow boundary from
convection that pushed across northern illinois earlier today just
north of the i-74 corridor. While a cu-field has developed along
this boundary, mid-level capping as evidenced by a maximum warm
layer temperature of 16c on the 12z kilx upper air sounding will
prevent convective development for the remainder of the afternoon.

The boundary will gradually dissipate mix northward by early
evening, followed by clear skies and muggy conditions tonight.

Another complex of thunderstorms will develop much further north
along a synoptic warm front across southern minnesota into
wisconsin overnight: however, this activity will remain well north
of the area. Lows tonight will only drop into the middle to upper
70s. Even hotter weather will be on tap for Friday as the primary
thermal ridge axis builds into illinois. Afternoon highs will top
out in the middle 90s with peak heat index values exceeding 105
degrees.

Long term (Friday night through Thursday)
issued at 252 pm cdt Thu jul 18 2019
one more very hot day will be in store for Saturday as heat index
values once again climb above 105 degrees. However, relief from
the heat is on the way... As a major pattern change will bring much
cooler and less humid conditions into the area next week.

12z jul 18 models are all in excellent agreement showing a
short-wave tracking across southern canada... Then digging a
significant trough over eastern canada into new england by Monday.

This will push a cold front southward into the region, with the
nam gfs ECMWF gem all bringing the front to near the i-72 corridor
by 12z sun. Given the highly capped airmass in the warm sector ahead
of the boundary, most models suggest its associated convection
will be post-frontal. As a result, think dry conditions will
prevail through Saturday... With pops increasing across the
northern half of the CWA by late Saturday night. Sunday will
feature the best rain chances across the entire area as the front
sinks slowly southward.

After a few lingering showers storms across mainly the southern
cwa Sunday night, a much cooler drier airmass will spill into the
region behind the departing cold front. Highs on Monday will only
reach the lower 80s, while lows Monday night dip into the upper
50s and lower 60s. While upper heights will gradually rise by the
middle of next week, prevailing northwesterly flow will ensure the
continuation of pleasant conditions with temperatures remaining in
the 80s through Thursday.

Aviation (for the 00z tafs through 00z Friday evening)
issued at 623 pm cdt Thu jul 18 2019
vfr conditions expected through the period. Diurnal cumulus is
showing signs of fading, though a few thicker bands of clouds are
persisting near kpia. Main concern will be with winds. While they
have been gusting over 20 knots this afternoon, they are starting
to show signs of fading, but will still be 7-10 knots overnight.

Kept low level wind shear in for kpia, which will be on the edge
of the jet streak moving from missouri to northern illinois.

Ilx watches warnings advisories
Excessive heat warning until 7 pm cdt Sunday for ilz038-043>046-
053>057-061>063-066>068-071>073.

Excessive heat warning until 7 pm cdt Saturday for ilz027>031-
036-037-040>042-047>052.

Update... Geelhart
short term... Barnes
long term... Barnes
aviation... Geelhart


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Jacksonville Municipal Airport, IL3 mi23 minSSW 10 G 1410.00 miFair84°F75°F75%1010.8 hPa

Wind History from IJX (wind in knots)
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Last 24hrS5S5S6S5SW5SW7S8S7S7S10SW11
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1 day agoSW3SW4SW3CalmCalmSW4CalmSW3CalmSW3W3CalmW4SW4CalmCalmSW4S4NW10
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2 days agoSE6SE8E4E4E3SE6SE4SE4SE3S3S5SE6SW4CalmCalmCalmNW5W3N4N3CalmCalmCalmSW3

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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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 Central Illinois, IL (0,6,7,8)
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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 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.