Monday, March27, 2017 L-36.com


Marine Weather and Tides
Hettick, IL

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 6:51AMSunset 7:21PM Sunday March 26, 2017 11:48 PM CDT (04:48 UTC) Moonrise 5:12AMMoonset 4:54PM 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 Hettick, IL
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location: 39.38, -90.06     debug


Area Discussion for - St. Louis, MO
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Fxus63 klsx 270401
afdlsx
area forecast discussion... Updated aviation
national weather service saint louis mo
1101 pm cdt Sun mar 26 2017

Short term (through late Monday afternoon)
issued at 334 pm cdt Sun mar 26 2017
weak surface ridge to continue building into region this evening,
as next closed low lifts northeastward out of southern plains
towards forecast area. Developing warm front associated with this
system to lift northward on nose of llj, so will see increasing
chances of showers and some thunderstorms by midnight over central
mo. Then the activity will spread east and northeast through rest of
forecast area by daybreak.

During the day on Monday as surface low tracks along i-44 corridor
in mo, will see strong to severe storms possible, mainly over
southeast mo and southern il where mu capes between 1000 and 2000
j/kg, decent effective shear and plenty of low level moisture. This
system to move out a bit quicker than yesterday's, so will see
showers and storms taper off through the mid to late afternoon hours
from west to east.

As for temps, will see lows tonight in the mid 40s to mid 50s and
highs on Monday will be in the mid 50s to near 70.

Byrd

Long term (Monday night through next Sunday)
issued at 334 pm cdt Sun mar 26 2017
all the guidance continues to support an active pattern through the
weekend with an especially wet period from Wednesday through early
Friday.

Present indications are that any precipitation on Monday night
should be confined to the early evening and mainly be located from
southeast mo into south central il. The upper trof moving through
the region on Monday will be centered through the far eastern CWA at
00z Tuesday and exiting quickly eastward into the oh valley. The new
forecast trims back the western extent of the pops and even this may
be a bit overdone, with the greatest threat of lingering showers in
south central il.

Tuesday looks like a tranquil day with height rises aloft in the
wake of the departing system and in advance of the next deep upper
trof/low. High pressure will dominate the low-levels and low-level
moisture trapped within the ridge should make for a mostly cloudy
day with near average temps.

The ECMWF and GFS have come into better agreement with the large
scale mass fields wed/thurs with the GFS now trending towards the
more persistent ECMWF solution. The largest differences evolve
Friday into the weekend.

The gradual progression of the next southwest upper trof/low through
the south/central rockies on Tuesday night will result in backing
flow aloft as well as height falls as a lead impulse moves into
western mo. The mass changes attendant with this system will also
lead to the development of a southerly LLJ which will remain focused
into eastern ks/western mo through 12z Wednesday, and this is where
the majority of the precipitation should remain through daybreak.

Slow progession of the upper trof into the southern/central plains
on Wednesday will result in continued height falls aloft/backing
upper flow and a slow eastward shift of the southerly llj. Thus the
greatest precipitation threat will be centered through western mo
and into parts of central mo through Wednesday afternoon. The
threat/coverage of precipitation should ramp-up Wednesday night into
Thursday as the upper trof and nearly vertically stacked system
continues to progress east and deep southerly flow and moisture
transport evolves, including a pronounced southerly llj. Attendant
with this would be a chance of thunderstorms.

As alluded to above, the GFS and ecwmf diverge Friday into the
weekend. The ecwmf is more progressive overall with this mid-late
week system departing early Friday and then the next upper trof/low
into the plains on Sunday, and into the ms valley on Monday. At
this point there is no clearly preferred solution and the forecast
is an ensemblistic approach with another threat of showers late
Saturday night into Sunday.

Glass

Aviation (for the 06z tafs through 06z Monday night)
issued at 1045 pm cdt Sun mar 26 2017
showers and thunderstorms across eastern portions of ks and ok
and west central and southwest mo, ahead of an approaching upper
level and surface low will spread into the TAF sites late tonight
and early Monday morning. The cloud ceiling will drop down into
the ifr catagory as the low levels of the atmosphere saturate. The
surface wind will become easterly as the surface low approaches
southwest mo late tonight, then back around to a northwest
direction Monday afternoon as the surface low moves eastward
through southern mo. The showers and storms should shift southeast
of the TAF sites by late afternoon or early Monday evening with
improvement of the cloud ceiling into the MVFR catagory.

Specifics for kstl: showers and thunderstorms across eastern portions
of ks and ok and west central and southwest mo, ahead of an
approaching upper level and surface low will spread into the stl
area early Monday morning. The cloud ceiling will drop down into
the ifr catagory as the low levels of the atmosphere saturate. The
surface wind will become easterly as the surface low approaches
southwest mo late tonight, then back around to a northwest
direction Monday afternoon as the surface low moves eastward
through southern mo. The showers and storms should shift southeast
of the stl area by early Monday evening with improvement of the
cloud ceiling into the MVFR catagory.

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
Litchfield Municipal Airport, IL25 mi73 minE 47.00 miPartly Cloudy47°F46°F98%1014.2 hPa

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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 (0,6,7,8)
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Ground Weather Radar Station Central Illinois, IL
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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.