Thursday, August17, 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 6:17AMSunset 7:54PM Thursday August 17, 2017 1:02 AM CDT (06:02 UTC) Moonrise 12:53AMMoonset 3:34PM Illumination 26% Phase: Waning Crescent; Moon at 25 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 170419
afdlsx
area forecast discussion... Updated aviation
national weather service saint louis mo
1119 pm cdt Wed aug 16 2017

Update
Issued at 929 pm cdt Wed aug 16 2017
another line of showers and thunderstorms as moved into central
missouri ahead of a cold front that extends from low pressure over
the upper midwest southward into the central plains. This line
will move east and southeast over the next few hours per the
latest cams guidance. Made only minor adjustments to overnight
lows based on temperature trends.

Britt

Short term (through late Thursday afternoon)
issued at 332 pm cdt Wed aug 16 2017
a line of showers and isolated severe thunderstorms currently in
central missouri will rapidly move east through the region. This
first line of showers and thunderstorms will bring uncertainty to
the second line which will be highly dependent on if the atmosphere
has time to recover before the second line forms ahead of the cold
front. The cold front is currently in northwest missouri will move
into central missouri late this afternoon, then through the rest of
the area this evening. An additional line of showers and
thunderstorms is expected and reflected through several hrrr cams
runs. The cams runs have been inconsistent in evolution of storms.

If the atmosphere can recover. The primary threats will be damaging
winds and large hail. An isolated tornado is also possible late this
afternoon and evening particularly with the line of thunderstorms
just ahead of the cold front with sufficient bulk shear of 45 to 50
knots along with surface CAPE values in excess of 3500j kg.

High pressure will move into the area with partly cloudy skies on
Thursday with seasonal temperatures expected and this is reflected
in forecast temperatures.

Kelly

Long term (Thursday night through next Wednesday)
issued at 332 pm cdt Wed aug 16 2017
Thursday night through next Wednesday
a couple of strong systems will affect the area over the long term
however it looks like there will be just enough of a break in
between to get the eclipse in.

The first system moves through by Thursday evening with a clearing
sky and drier air moving in for Friday. However another short wave
moves in on the northwest flow Friday night into Saturday bringing
another chance of showers and storms. The surface front should be
clear of the area by midday Saturday. The models are now tending
to produce some ridging across the area Saturday into Monday. This
was best seen while looking at the ensembles of the gfs. The
ecmwf is also trending this way as it has now moved any
precipitation for Sunday night into Monday morning well to the
north. So conditions are looking pretty good for the eclipse in
the lsx cwa. Can't rule out an isolated shower or thunderstorm
Monday, but it should hold off until later in the afternoon.

The next short wave and associated front moves in Tuesday afternoon
into Wednesday morning with chances for showers and thunderstorms.

Temperatures are pretty seasonable with the warmest day looking to
be Monday.

Jpk

Aviation (for the 06z tafs through 06z Thursday night)
issued at 1109 pm cdt Wed aug 16 2017
a cold front extending from a surface low over southern mn
southwest through northwestern mo will move southeastward through
the TAF sites late tonight and Thursday morning. An area of
showers and thunderstorms ahead of this front and extending from
uin southwest through cou will move southeastward through the st
louis metro area late tonight. Most of this activity should shift
southeast of the TAF sites around 10z early Thursday morning with
at least a brief period of MVFR CIGS during the early morning
hours, then the sky will clear out during the late morning and
afternoon as drier air moves into the area after fropa. The
southwesterly surface wind will veer around to a westerly
direction late Thursday morning and early afternoon after fropa.

Specifics for kstl: a cold front extending from a surface low over
southern mn southwest through northwestern mo will move
southeastward through the stl area Thursday morning. An area of
showers and thunderstorms ahead of this front and extending from
uin southwest through cou will move southeastward through the stl
area late tonight. Most of this activity should shift southeast of
the stl area around 10z early Thursday morning with at least a
brief period of MVFR CIGS during the morning hours, then the sky
will clear out during the afternoon as drier air moves into the
area after fropa. The southwesterly surface wind will veer around
to a westerly direction early Thursday afternoon after fropa.

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
St. Louis, Spirit Of St. Louis Airport, MO8 mi68 minSW 112.50 miRain Fog/Mist71°F70°F96%1011.8 hPa
St. Louis Lambert International Airport, MO15 mi71 minWSW 12 G 2610.00 miLight Rain72°F70°F94%1011.9 hPa
St. Louis Downtown Airport, IL20 mi69 minN 010.00 miOvercast73°F69°F87%1011.7 hPa

Wind History from SUS (wind in knots)
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Last 24hrCalmCalmSE3CalmCalmE3CalmSE4SE5S9S535S3NE5E4S8S8SW5S5S3S8SW11S8
1 day agoCalmCalmCalmCalmCalmCalmCalmW34435SW4E43NE9NE7NE7SE7SE3SE4S5S5S4
2 days agoS3CalmCalmW3CalmE4E3S4S54S4S4S56S5SW3W6SW5CalmCalmCalmCalmCalmCalm

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
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for St. Louis, MO (2,6,7,8)
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Ground Weather Radar Station St. Louis, MO
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weather_mapweather_map weather_map

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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.