Wednesday, September26, 2018 L-36.com


Marine Weather and Tides
Winchester, MO

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

Sunrise 6:53AMSunset 6:53PM Wednesday September 26, 2018 5:18 AM CDT (10:18 UTC) Moonrise 7:08PMMoonset 7:13AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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
    EDIT      (on/off)   Help


7 Day Forecast for Marine Location Near Winchester, MO
   Hourly   EDIT   Help
location: 38.58, -90.53     debug


Area Discussion for - St. Louis, MO
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 klsx 260855
afdlsx
area forecast discussion
national weather service saint louis mo
355 am cdt Wed sep 26 2018

Short term (through late tonight)
issued at 354 am cdt Wed sep 26 2018
post frontal showers and storms should nearly be out of the area by
daybreak, setting the stage for a proper fall day. Breezy, dry, and
cool NW winds behind the front will scour moisture out of the low-to-
mid atmosphere. We'll only be left with scattered mid-to-high clouds
as a modest plume of moisture advects in above 500mb. Those NW winds
will also usher in much cooler temperatures, with non-bias corrected
forecast guidance keeping nearly the entire area below 70 this
afternoon.

By this evening, a bit more moisture will build into the mid levels,
per upstream obs and model guidance. This will result in slightly
lower cloud bases and an uptick in coverage as compared to the day.

Nonetheless, those NW winds will be enough to drop overnight low
temperatures to the coolest we've see this season by a good margin.

Bsh

Long term (Thursday through Tuesday)
issued at 354 am cdt Wed sep 26 2018
mid-high level cloudiness across southeast mo and southwest il will
advect southeast of our forecast area by Thursday afternoon as a
positively tilted, southern stream upper level trough with embedded
shortwaves shifts east of our area. Will see slightly warmer
temperatures Thursday and Thursday night with temperatures at or
slightly below normal for late september. Another cold front will
drop southward into our area late Thursday night and Friday as more
shortwaves move through the upper level trough over the northern
plains and great lakes region. The NAM model is the quickest
dropping this front through our forecast area late Thursday night
and Friday morning, while the ECMWF model does not move it through
our area until Friday afternoon and night. For now will follow the
compromise solution of the operational GFS with the timing of this
front. There may be a few showers across northeast mo and west
central il Friday afternoon just behind the front. As the front
drops further southward it will weaken with the best upper level
support for any precipitation shifting well northeast of our area.

Cooler air will filter into northeast and central mo and west
central il behind the cold front Friday and into most of the
forecast area Friday night. Cool temperatures can be expected
Friday night and Saturday, about 5 to 10 degrees below normal.

There will be a chance of showers across northeast into central mo
and west central il Saturday and Saturday night due to low-mid level
warm air advection coupled with a return southerly flow of moisture
on the backside of the retreating surface ridge shifting east of our
area. A weak warm front will also be lifting slowly northward
through this area. The precipitation will shift north of our
forecast area by Sunday. Will see warmer temperatures Sunday and
into the next work week due to a persistent south-southwesterly
surface low-level flow and rising upper level heights.

Gks

Aviation (for the 06z tafs through 06z Wednesday night)
issued at 1127 pm cdt Tue sep 25 2018
rather solid band of showers and some thunderstorms is sliding
through our region and will affect the TAF sites, especially the
stl metro ones where it is approaching. This will take much of the
overnight to move through. Look for a period of MVFR ceilings as
well, with all sites becomingVFR by sunrise Wednesday. NW surface
winds, gusty at times to 20-25kts, will diminish Wednesday
morning.

Specifics for kstl: a few hours of showers are now expected
overnight, possibly a thunderstorm. This will be coincident with
with MVFR ceilings for the most part. Otherwise,VFR conditions
will settle in by sunrise Wednesday and continue through the
remainder of the valid period with gusty NW surface winds
diminishing during Wednesday morning.

Tes

Lsx watches warnings advisories
Mo... None.

Il... None.

Wfo lsx


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Louis, Spirit Of St. Louis Airport, MO8 mi25 minNW 1110.00 miOvercast58°F55°F90%1019.2 hPa
St. Louis Lambert International Airport, MO15 mi28 minN 910.00 miOvercast58°F55°F93%1019.1 hPa
St. Louis Downtown Airport, IL20 mi26 minN 910.00 miLight Rain57°F55°F93%1019.5 hPa

Wind History from SUS (wind in knots)
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrCalmCalmCalmSW35S8SW4SW6SW8SW10SW10
G15
SW10SW6SW4SW4W4N55
G15
N8N10NW15
G19
NW9NW6NW11
1 day agoE4SE4E3E5E4S5553S4S53SW4S3S4S5S3SW3S3CalmCalmCalmCalmCalm
2 days agoCalmCalmCalmNE5E6E5E45NE74E6NE5E4E3SW3CalmCalmE3E3CalmE4E4E5E6

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES Local Image of    EDIT
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for St. Louis, MO (6,6,7,8)
      (on/off)   Help

Ground Weather Radar Station St. Louis, MO
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.