Wednesday, April24, 2019 L-36.com


Marine Weather and Tides
Barry, 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 6:13AMSunset 7:53PM Wednesday April 24, 2019 3:44 AM CDT (08:44 UTC) Moonrise 12:00AMMoonset 9:12AM Illumination 76% 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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7 Day Forecast for Marine Location Near Barry, IL
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location: 39.71, -91     debug


Area Discussion for - St. Louis, MO
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Fxus63 klsx 240838
afdlsx
area forecast discussion
national weather service saint louis mo
338 am cdt Wed apr 24 2019

Short term (through late Thursday afternoon)
issued at 335 am cdt Wed apr 24 2019
a slow moving positively tilted upper trof currently extending from
far northwest mo into southeast ks will slowly shift eastward into
the middle ms valley today. A series of vorticity maxima within
southwest flow ahead of the trof will help bring several waves of
rain showers to the region today. The current wave is centered
between columbia and st. Louis which is also being aided by lift via
a weak southwesterly LLJ will shift east-northeastward this morning
and should largely be centered within south central il after 12z.

Another wave is expected to develop across southwest south central
mo later this morning, and this will move east-northeast into
southeast and east central mo during the late morning early
afternoon and into southwest il early mid afternoon. The warm front
will also retreat northward into southeast mo and southern il later
this morning and into the afternoon as a surface low moves along it.

Increasing instability both surface and elevated along and north of
this boundary and migrating surface wave will support scattered
thunderstorms, and deep layer shear and progged SBCAPE over 1000
j kg would suggest a few of the storms in the vicinity of the front
and low could be rather robust this afternoon and early this
evening. Precipitation trends across northeast mo and west central
il are a bit harder to gage. There will be scattered showers through
mid-morning but then I think the overall trend will be downward in
terms of probability and coverage. Clouds will limit temperatures
today and it looks like another day of below average readings.

The focus for precipitation tonight will shift to southeast mo and
southern il. The aforementioned positively titled trof will weaken
significantly as it moves east resulting in veering low and mid
level flow. During the evening the precipitation will be associated
with the frontal boundary draped across semo SRN il, but by the
later part of the evening waning instability and a lack of forcing
should bring diminishing coverage. Overnight however there will be
an upswing in rain showers spreading back into southeast mo from the
southwest attendant with the migratory southern stream upper
low trof. Otherwise I think stratus fog will dominate the area
tonight into early Thursday morning given very moist low levels and
light winds.

Forcing associated with the upper system moving through the lower ms
valley will continue to support showers across southeast mo and
southern il on Thursday, with coverage diminishing in the afternoon
as the trof moves east. A digging northern stream upper trof will
also send a secondary cold front into northeast mo and west central
il on Thursday afternoon, which will be accompanied by scattered
showers and maybe even a thunderstorm.

Glass

Long term (Thursday night through Tuesday)
issued at 335 am cdt Wed apr 24 2019
(Thursday night - Friday)
a cold front associated with a northern stream shortwave trough is
expected to be across far southeastern sections of the forecast area
Thursday evening. This front should quickly exit the CWA and merge
with an inverted trough that extends northeastward out of a surface
low across the lower-mississippi valley. A few lingering showers are
possible early on Thursday evening associated with this frontal
boundary, mainly across southeast missouri and southwest illinois in
close proximity to the front. Dry weather is forecast behind the
boundary across the bi-state area for the remainder of Thursday
night as well as through the day on Friday.

The combination of moderately strong low-level cold air advection,
decreasing cloudiness, and slackening of northwest winds should lead
to a seasonably cool night Thursday night. Forecast lows range from
the mid 40s to near 50 degrees from northwest to southeast.

Seasonable temperatures will continue on Friday to conclude the work
week along with a mostly sunny sky. Highs should top out in the
upper 60s to mid 70s from north to south across the area.

(Friday night - Saturday)
a system will likely eject eastward out of wyoming Friday night and
into the central plains. The combination of a lead vorticity maxima
and increasing low-level moisture convergence should yield a round
of showers across much of the northern half of the CWA late Friday
night into early Saturday. After the passage of the aforementioned
vorticity maxima coincident with stronger low-level warm moist
advection moving off into the ohio valley, there should be a break
in activity. Attention then will turn to the trailing cold front.

This boundary may provide another round of showers and a few
thunderstorms with it, but coverage of activity is uncertain. It
will depend on the track of the parent system shortwave trough, more
specifically, how far north this feature tracks. The ECMWF has a dry
frontal passage due to a more northerly track and weaker convergence
along the surface frontal boundary. Meanwhile the GFS and especially
the cmc gem are further south, with more influence felt across the
mid-mississippi valley from the shortwave trough leading to isolated
to scattered coverage of showers storms.

Temperatures during this period will be quite difficult because of
the low confidence in the timing and track of this system. For now,
leaned fairly close to climatological norms which resulted in lows
Friday night in the upper 40s to low 50s and highs on Saturday in
the mid 60s to low 70s.

(Saturday night - Sunday)
the cold front associated with Saturday's system should move south
and east of the CWA early Saturday night, with a surface high across
the upper midwest sliding southeastward with time. Another short
period of dry weather is forecast, along with seasonably cool
temperatures. Lows on Saturday night Sunday morning are forecast to
be in the upper 30s to upper 40s from northwest to southeast. Cannot
rule out the possibility either of scattered frost across parts of
northeast missouri and or west-central illinois if the timing of the
surface ridge is just right. This would help provide favorable
conditions for radiational cooling with light variable winds along
with a clearing sky.

Sunday's highs should be at least slightly cooler than those on
Saturday, mainly due to a cold start to the day with increasing
cloudiness expected from the west during the day. Look for high
temperatures to be in the low to upper 60s, or about 5 degrees below
normal for the date.

(Sunday night - Tuesday)
quasi-zonal flow aloft is expected early next week with several weak
disturbances quickly moving across the region. With a surface front
likely stalled somewhere between the lower to mid-mississippi valley
regions, the expectation is for a wet weather pattern to begin. Not
surprisingly, deterministic models differ greatly with the placement
of this front and its evolution, which makes temperature forecasting
a chore. Needless to say that there is a low confidence high
uncertainty with respect to temperatures early next week, in
particular high temperatures. For now, started off near normal for
highs on Monday before moderating slightly on Tuesday due to an
expectation that the stalled front will move at least slightly back
to the north as a warm front as the mid upper level flow becomes
more southwesterly.

Gosselin

Aviation (for the 06z tafs through 06z Wednesday night)
issued at 1046 pm cdt Tue apr 23 2019
stationary front extends across southern portions of mo and il.

Showers will through the TAF sites late tonight and Wednesday
as a weak surface low develops along this front ahead of an
approaching upper level disturbance. The cloud ceiling will
lower late tonight, down to around 1000 feet by early Wednesday
morning. The cloud ceiling will rise some Wednesday afternoon,
but remain MVFR. The surface wind will be east-northeasterly
late tonight, albeit quite weak, then become mainly
north-northwesterly by late Wednesday afternoon or evening
and remain weak.

Specifics for kstl: stationary front extends across southern
portions of mo and il. Showers will through stl late tonight
and Wednesday as a weak surface low develops along this front
ahead of an approaching upper level disturbance. The cloud
ceiling will lower late tonight, down to around 1000 feet by
early Wednesday morning. The cloud ceiling will rise some
Wednesday afternoon, but remain MVFR. The surface wind will
be east-northeasterly late tonight, albeit quite weak, then
become mainly north-northwesterly by late Wednesday afternoon
or evening and remain weak.

Gks

Lsx watches warnings advisories
Mo... None.

Il... None.

Wfo lsx


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsfield, Pittsfield Penstone Municipal Airport, IL13 mi49 minE 47.00 miOvercast54°F52°F96%1015.2 hPa
Quincy Regional Airport-Baldwin Field, IL19 mi50 minSE 38.00 miOvercast53°F50°F89%1015.1 hPa

Wind History from PPQ (wind in knots)
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Last 24hrNW7
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NW8NW7NW8NW7W7W5NW5NW6N4N4N3N4NW3CalmN6NE6NE3NE5NE4E3E5E4E3
1 day agoS6S5S6S7
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2 days agoS3S4S3SE5S5S9S10S12S12S11S10
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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 St. Louis, MO (4,6,7,8)
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Ground Weather Radar Station St. Louis, MO
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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.