Monday, August21, 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 6:21AMSunset 7:48PM Monday August 21, 2017 8:35 PM CDT (01:35 UTC) Moonrise 5:07AMMoonset 6:55PM Illumination 0% Phase: New Moon; Moon at 29 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 220008
afdlsx
area forecast discussion... Updated aviation
national weather service saint louis mo
708 pm cdt Mon aug 21 2017

Short term (through late Tuesday afternoon)
issued at 344 pm cdt Mon aug 21 2017
scattered afternoon thunderstorms are mainly being driven by
afternoon heat and humidity as well as a pair of outflow boundaries
left over from this morning's storms. Temperatures have rebounded
back into the upper 80s and low 90s in the wake of the eclipse which
has invigorated convection. Had a few reports of wind gusts to 40-
50 mph, frequent lightning, and brief heavy downpours as the cores of
the storms fall out, but deep layer effective shear is only 25-30kts
at this time, so think widespread severe weather is unlikely even
with the fairly high MLCAPE values of 2500 j kg indicated on the spc
mesoanalysis at this time. Should see these afternoon storms
diminish this evening as we lose daytime heating.

Attention turns to the cold front over the northern plains tonight.

This front will push southeast into northern missouri and west
central illinois between 08-11z. Showers and thunderstorms look
likely along and ahead of the front after midnight tonight. Guidance
seems to be in good agreement that a line of storms will move into
the area ahead of the front after 06z and move southeast to near the
i-70 corridor by between 09-12z. The line slows as elevated
instability wanes toward morning... With scattered thunderstorms
likely continuing across the southern 1 2 to 2 3 of the forecast
area on Tuesday before the front finally pushes all the way through
the area on Tuesday night.

Carney

Long term (Tuesday night through next Monday)
issued at 344 pm cdt Mon aug 21 2017
should have lingering showers and storms southeast of the stl area
Tuesday evening until the cold front shifts southeast of our
forecast area and a surface ridge builds southeastward into the
region from the northern plains. Cooler and less humid air will
filter into the area Tuesday night leading to lows about 5 to 10
degrees below normal. This will begin a period of relatively cool
and dry weather from Wednesday into the weekend as surface ridging
remains locked in place from the great lakes region southwest into
eastern mo with any convection likely remaining west and north of
our forecast area. Although weak northwest flow shortwaves will
move through the region it appears that the low levels will be too
dry to generate any precipitation. The ECMWF model does develop an
upper level trough over the northern plains on Sunday, but it looks
like any precipitation associated with this feature will stay north
of our forecast area. Highs will typically be around 80 degrees
with lows in the upper 50s to around 60 degrees during this period.

Gks

Aviation (for the 00z tafs through 00z Tuesday evening)
issued at 702 pm cdt Mon aug 21 2017
scattered storms ahead of front through this evening so have
vicinity TS mention. Then cold front to begin moving thru taf
sites by 05z Tuesday with storms along it. So timing similar to
last set of tafs. Behind cold front will see MVFR CIGS for a few
hours, so kept mention in. As for winds, southeast to south winds
to veer to the west then northwest to north behind cold front.

Specifics for kstl:
scattered storms ahead of front through this evening over portions
of NE and central mo, but should diminish before reaching metro
area. Then cold front to begin moving thru metro area by 08z
Tuesday with storms along it. So timing similar to last set of
tafs. As for winds, southeast winds to veer to the west then
northwest to north behind cold front.

Byrd

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 mi42 minN 010.00 miMostly Cloudy81°F77°F88%1014.8 hPa
St. Louis Lambert International Airport, MO15 mi45 minESE 710.00 miMostly Cloudy84°F71°F65%1015 hPa
St. Louis Downtown Airport, IL20 mi43 minN 010.00 miFair81°F72°F74%1015.8 hPa

Wind History from SUS (wind in knots)
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Last 24hrN4S3CalmS3CalmCalmCalmNW3CalmCalmW3W4SW9W9W7SW7SW5W3W7SW7W7SW4E3Calm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmN3W7N8N9E5E5SE7S8S7SW6SW4SW9
2 days agoCalmCalmCalmNW7CalmCalmCalmCalmCalmCalmCalmCalmCalm3S3Calm5W6SW6SW6W4W4CalmCalm

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
Geos

Wind Forecast for St. Louis, MO (21,6,7,8)
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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.