Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Winchester, MO

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:50AMSunset 4:46PM Tuesday November 21, 2017 4:09 AM CST (10:09 UTC) Moonrise 9:24AMMoonset 7:27PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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 Winchester, MO
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location: 38.58, -90.53     debug


Area Discussion for - St. Louis, MO
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Fxus63 klsx 210921
afdlsx
area forecast discussion
national weather service saint louis mo
321 am cst Tue nov 21 2017

Short term (through late tonight)
issued at 315 am cst Tue nov 21 2017
a upper trof was located over the mississippi river valley early
this morning, with several imbedded shortwave disturbances. Three
are of note: the first was directly over our region, helping to
create an area of mid and hi level cloudiness to its east in il; a
second, stronger disturbance was over northern mn and eastern nd;
and a third was over western mt. At the surface, a cold front
extended from western wi thru central ia and into southeast
nebraska. SW surface winds existed ahead of the front across our
region and have kept temperatures in the 40s for much of the area.

The atmospheric column was much too dry and lifting mechanisms too
weak to produce any pcpn anywhere near our region.

The first shortwave disturbance over our region will exit before
12z tue. The strong second disturbance over mn nd will be the main
driver in deepening the upper trof and its southern periphery will
come close to edging our northern and northeastern CWA during the
afternoon hours, but much of the lift from it will remain outside
the cwa. The third disturbance over western mt should track well
south of our region during late this afternoon and early evening.

Focusing on the second disturbance to edge our N and NE CWA this
afternoon, this will also track behind the timing of the passage of
the surface cold front which should make it thru areas N and W of
stl metro this morning, stl metro during midday, and areas S and e
of stl metro during early-mid afternoon. Both low level moisture
will be limited due to presence of a blocking ridge over the gulf of
mexico and aloft due to a very dry initial column and the main lift
missing our area and it tracking too fast to saturate anything below
the mid levels. Taking all of this into account, despite a cold
fropa, it should be dry today but with plenty of cloud cover. The
strength of the cold front today will result in falling afternoon
temps, especially for areas near and north of interstate 70, along
with gusty NW winds of 25-30mph. MAX temps will be slightly above
average ranging from the upper 40s in northern mo and central il, to
the 50s elsewhere.

A cold canadian high pressure will build in and dominate our region
tonight with clear skies and below average temps, as readings bottom
out in the lower 20s for most areas, or about 10 degrees below
norms.

Tes

Long term (Wednesday through Monday)
issued at 315 am cst Tue nov 21 2017
the tranquil, dry weather pattern will continue through the
forecast period with dry, cold frontal passages. Despite full
sunshine it will be colder on Wednesday with northwesterly mid-upper
level flow, and a surface ridge moving through the forecast area.

Warm advection, mid level cloudiness will drop southeastward through
our area Wednesday night with a warming trend beginning on Thursday.

More pronounced warming can be expected on Friday as surface low
level winds strengthen from a southwesterly direction. Highs on
Friday will be around 10 degrees above normal for late november. A
cold front will drop southeastward through our forecast area Friday
afternoon and night as an upper level trough moves eastward through
the great lakes region. It appears that any precipitation will be
northeast of the forecast area closer to the better upper level
forcing, although could not totally rule out a few sprinkles in
northeast mo and west central il Friday afternoon and evening. Will
see cooler temperatures beginning Saturday and continuing through
the weekend as a large surface ridge moves slowly through our area
with continued northwesterly upper level flow, although the coldest
air should remain northeast of the forecast area. Will see a
warming tend beginning on Monday as the surface winds become
southerly as the surface ridge shifts east of the region.

Gks

Aviation (for the 06z tafs through 06z Tuesday night)
issued at 1050 pm cst Mon nov 20 2017
dry andVFR conditions are expected through the period. Llws will
continue through mid morning on Tuesday as a south southwesterly
low level jet has developed over the area. A cold front will move
southeast across the area on Tuesday causing the wind to shift
from southwest to northwest.

Specifics for kstl:
dry andVFR conditions are expected through the period. Llws will
continue through 15z. A cold front will move through the terminal
around 19z causing winds to shift out of the northwest.

Britt

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
St. Louis, Spirit Of St. Louis Airport, MO8 mi16 minSSW 810.00 miFair48°F30°F50%1010 hPa
St. Louis Lambert International Airport, MO15 mi19 minSSW 810.00 miA Few Clouds45°F28°F54%1010.3 hPa
St. Louis Downtown Airport, IL20 mi17 minS 410.00 miFair42°F28°F60%1010.8 hPa

Wind History from SUS (wind in knots)
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Last 24hrCalm3SW6SW9S9SW8S11
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1 day agoW7W8W8NW10NW12W10NW11NW12
G20
W5W7W9NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoS4S55SW8SW13
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W13W14
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NW8NW7NW11
G18
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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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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Midwest    EDIT
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Wind Forecast for St. Louis, MO (5,6,7,8)
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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.