Tuesday, September25, 2018 L-36.com


Marine Weather and Tides
Olmsted, IL

Version 3.4
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9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:47AMSunset 6:50PM Tuesday September 25, 2018 8:06 AM CDT (13:06 UTC) Moonrise 7:32PMMoonset 7:07AM Illumination 100% Phase: Full Moon; Moon at 15 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 Olmsted, IL
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location: 37.18, -89.08     debug


Area Discussion for - Paducah, KY
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Fxus63 kpah 251110
afdpah
area forecast discussion
national weather service paducah ky
610 am cdt Tue sep 25 2018

Update
Updated aviation section for 12z TAF issuance

Short term (today through Thursday night)
issued at 330 am cdt Tue sep 25 2018
after the impressive rainfall amounts of the past few days,
averaging from 2 to 5 inches in west ky and SE missouri, the final
round of precipitation looks relatively uneventful.

A moist southerly low level wind flow is contributing to precip
water values around 2 inches, near record levels for this time of
year. A round of warm advection showers and storms has developed
in the tropical moisture over SE missouri early this morning. The
00z suite of high-res models has a good handle on this rainfall,
which should overspread southern il early this morning. Later this
morning into the afternoon, this area of showers and storms is
forecast to shift eastward across the lower ohio valley as it
loses organization. The rate of movement of the activity is likely
to keep rainfall totals below flash flood guidance values.

Later this afternoon, there is a general model consensus there
will be a lull in the activity. There may be some breaks in the
overcast. Most areas should reach the lower 80s today, with dew
points in the lower to mid 70s.

Tonight, a surface cold front will move southeast across
southeast mo and southern il around 06z, then across the ohio
river around 09z. One's initial thought might be another round of
heavy rainfall would accompany the front. However, the models are
in good agreement that the deep layer wind flow will veer into the
southwest or even west ahead of the front. As a result, precip
water values are forecast to decrease to near 1.5 inches before
the front passes. In addition, our region will be in the entrance
region of the southwest low level jet, potentially resulting in
low level divergence. The models indicate rather low QPF amounts,
and MOS pops are only in the chance category for tonight.

There is some potential for a few strong to severe storms. As
mentioned above, a limiting factor is the limited low level
convergence needed for sfc-based storm initiation. The timing of
the frontal passage during the overnight hours is not favorable,
since instability will be on the wane. However, there will be a
period of rather strong instability later today and this evening.

Surface based capes will peak around 2000 j kg where any breaks
in the cloudcover occur this afternoon. There will be sufficient
deep-layer flow (30-40 kt in the mid levels) for storm
organization if activity is able to develop in the warm sector,
ahead of the front this afternoon or this evening.

On Wednesday, the cold front will exit western ky around 12z. Any
lingering showers will end early in the day. Cooler and much drier
north winds will limit high temps to the lower 70s, even with
increasing afternoon sunshine. Lows Wed night will be in the lower
50s, although a few upper 40s are possible.

On Thursday, a 500 mb trough will shear out as it moves northeast
from the ozarks across the lower ohio valley. This feature will
produce considerable cloudiness, but clearing is expected later in
the day. Weak surface high pressure will maintain the cool dry air
mass, with highs again in the lower 70s.

Long term (Friday through Monday)
issued at 330 am cdt Tue sep 25 2018
confidence starts out high and then decreases from Sunday into
next week.

Surface high pressure will keep the area dry and seasonably cool
Friday through Sunday. Aloft we will be on the fringe of cyclonic
flow. The medium range models all to a certain extent bring a weak
surface low cold front toward the area Saturday with a weak
mid upper-level disturbance. However, the forcing diminishes as it
moves south into our area, so the associated precipitation ends up
drying up before reaching our area, leaving us with nothing more
than a minor reinforcing shot of surface high pressure.

The surface high begins to build east of the area, resulting in
southeast winds Sunday. The GFS develops a weak warm frontal
boundary and generates some convection just into our far northwest
territory in the afternoon and evening. The ECMWF and cmc have
different solutions and keep the area dry. We will have the
slightest of chances for showers and thunderstorms in that region
in respect for the gfs.

By Monday the upper ridge begins to re-assert itself over the
southeast states and the northern gulf, which puts our region in
weak southwest flow aloft. This will lead to south winds at the
surface, an increase in low-level moisture, and the potential for at
least scattered convection over the region.

By Tuesday a northern stream storm system will have moved quickly
into the great lakes or southeast canada depending on how much
amplitude the southeastern upper ridge develops. The GFS is flatter
with the ridge and pushes a cold front into the area early Tuesday.

Meanwhile the ECMWF has more amplitude and keeps the cold front to
our north. Both models develop substantial QPF over our entire
region. The presence of better flow aloft and the cold front in the
gfs solution would raise a minor severe concern. For now we will
hold pops under likely levels given the uncertainty in the general
scenario.

Aviation
Issued at 610 am cdt Tue sep 25 2018
an area of showers and thunderstorms over southern il and southeast
mo early this morning may clip the ohio river valley TAF sites this
morning. Within storms, ifr conditions will occur in heavy rain.

After this activity moves away during the midday hours, scattered
storms will develop through the afternoon and evening. The
probability of occurrence at any given TAF site is too low for any
tempo groups. Outside storms, MVFR conditions will improve toVFR
later today and early tonight.

A cold front will move southeast across the region overnight, mainly
after 06z. This front will be accompanied by a wind shift into the
west or northwest. Widespread low clouds will arrive along and
behind the front, including some ifr cigs.

Pah watches warnings advisories
Il... None.

Mo... None.

In... None.

Ky... None.

Short term... My
long term... Drs
aviation... My


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cairo Regional Airport, IL11 mi71 minS 610.00 miOvercast73°F72°F100%1014.6 hPa
Metropolis Municipal Airport, IL17 mi70 minS 77.00 miOvercast73°F71°F94%1014.9 hPa
Paducah, Barkley Regional Airport, KY18 mi73 minS 610.00 miOvercast75°F71°F88%1014.1 hPa

Wind History from CIR (wind in knots)
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Last 24hrS3S3S3CalmCalmS5CalmCalmS5CalmCalmS5SE5SE5SE7SE4SE4SE5SE7SE7S7S7S5S7
1 day agoN6NE7NE5N4NE5NE8NE8NE5NE7NE5E6N3E5NE4NE6E5CalmNE3E3CalmCalmCalmCalmS4
2 days agoNE5N6NE10NE10N7N6NE11NE8NE8N7N6N6N7NE7NE9N6N5N5N5N4NE5N4N5N5

Tide / Current Tables for
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Weather Map and Satellite Images
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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.
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Wind Forecast for Paducah, KY (9,2,3,4)
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Ground Weather Radar Station Paducah, KY
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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.