Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Winchester, MO

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:57AMSunset 7:19PM Thursday March 23, 2017 1:17 AM CDT (06:17 UTC) Moonrise 3:16AMMoonset 1:47PM Illumination 20% 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 230446
afdlsx
area forecast discussion... Updated aviation
national weather service saint louis mo
1146 pm cdt Wed mar 22 2017

Short term (through late Thursday afternoon)
issued at 326 pm cdt Wed mar 22 2017
as surface ridge shifts off to the east tonight, winds to veer to
the southeast across the region. So southeast winds along with mid
and high clouds, lows will be a bit milder with near normal lows in
the low 30s to low 40s.

In the meantime, next weather system to begin lifting northeastward
out of the desert southwest towards region. Will see increasing low
level moisture, weak instability and developing warm front lift
northeastward through region late tonight. Scattered showers and/or
drizzle to develop along and north of boundary and move across
central/northeast mo and west central il. Then as system exits area,
precipitation to taper off from south to north, coming to an end
late Thursday afternoon. As for high temperatures tomorrow, it will
depend on cloud cover and precipitation. For now have highs in the
mid 50s to low 70s, with the warmest temps over central mo.

Byrd

Long term (Thursday night through next Wednesday)
issued at 326 pm cdt Wed mar 22 2017
a very active pattern seems in store thru the middle of next week.

Main focus will be potential for severe threat on sat, otherwise,
pops in general.

Mdls are in fairly good agreement thru the weekend in a general
sense. An upper trof will begin traversing the rockies tonight with
strong lee cyclogenesis thru fri. While mdls agree with the general
soln, the small differences among solns will have a big impact on
the severe threat for the cwa. Mdls are suggesting a classic cold
core system, tho the GFS is more stacked than the other guidance.

Location and timing of sfc features will determine locations of any
severe threat.

Expect a dry slot to push into the area ahead of the approaching sfc
low. Have trended temps warmer, but are probably still not warm enuf
even with a short period of warming. Low topped tsra will be
possible, potentially supercells where hodographs are optimized,
with all severe threats possible near the sfc low. Further south,
appears there will be enuf CAPE with steep enuf lapse rates to
support at least a hail threat. Will need to continue to monitor
this event as it approaches.

Otherwise, trended warm thru sat. Generally trended twd a compromise
beyond with mdl solns continuing to diverge. Generally capped pops
in low chance or slight chance range beyond mon. The gem is faster
with moving the sfc ridge out of the area and the next approaching
system. Have kept low pops to account for this soln, but have low
confidence in this soln.

Tilly

Aviation (for the 06z tafs through 06z Thursday night)
issued at 1145 pm cdt Wed mar 22 2017
vfr conditions are expected to prevail at the TAF sites for much
of the valid period. A warm front will approach our region later
tonight and will result in scattered showers maybe a thunderstorm
developing out ahead of it. Have placed in vcsh when the highest
probs are expected at most of the TAF sites mainly during Thursday
morning, with the addition of a tempo group at uin. A period of
MVFR conditions is now expected at uin with it possible elsewhere
but less likely. Clearing is then anticipated for later on Thursday
afternoon into evening as the warm front pushes thru. Surface
winds will gradually veer from easterly to southeast tonight and
southerly on Thursday. Llws has been added for much of Thursday
night with a 45-50kt low level jet expected.

Tes

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 mi24 minE 710.00 miA Few Clouds44°F19°F38%1027 hPa
St. Louis, Lambert-St. Louis International Airport, MO15 mi27 minESE 1310.00 miMostly Cloudy44°F19°F37%1027.7 hPa
St. Louis Downtown Airport, IL20 mi25 minESE 710.00 miFair42°F18°F38%1027.7 hPa

Wind History from SUS (wind in knots)
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Last 24hrN3N4NE7NE10E17E15E14E12E14E9E12
G18
NE9
G15
E12
G18
NE9E12E12E8E9E6E4E7E8E7E7
1 day agoNE5N5NE4NE5N4NE6NE4N7NE6E8NE10
G19
N6
G15
NE8NE8N11NE15
G21
NE12NE9NE6N8N7NE10N9N6
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmSW7W9W8SW10W8W8W7NW8
G18
NW12
G15
N11N9N9NE12
G22
NE11NE8NE7

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.