Marine Weather and Tides
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 5:50AM||Sunset 8:24PM||Saturday July 22, 2017 5:55 AM CDT (10:55 UTC)||Moonrise 4:01AM||Moonset 6:46PM||Illumination 2%|
EDIT (on/off)  Help
7 Day Forecast for Marine Location Near Hettick, ILHourly EDIT Help
Area Discussion for - St. Louis, MO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 klsx 220850|
area forecast discussion
national weather service saint louis mo
350 am cdt Sat jul 22 2017
Short term (through late tonight)
issued at 350 am cdt Sat jul 22 2017
warm front extending from surface low over south central iowa east
southeastward through central illinois will eventually lift
northeastward away from forecast area. In the meantime, could see
some isolated showers storms over portions of west
central southwestern il through sunrise.
Beyond that, main cold front to begin sinking slowly southward into
northern missouri today and tonight with isolated scattered showers
and storms spreading south across region. As conditions become
unstable this afternoon through tonight, some of these storms could
be strong to severe. In the meantime, hot and humid conditions to
persist with highs in the mid 90s to low 100s. Heat indices will be
in the 100 to 115 range once again. Lows tonight will be in the 70s.
Long term (Sunday through Friday)
issued at 350 am cdt Sat jul 22 2017
it continues to look more likely that most areas will see one
more day on Sunday of high heat and humidity before this event comes
to a close.
By Sunday, a transition to a NW flow aloft is expected in response
to a strong upper level storm system dropping southeastward into the
great lakes region from the canadian plains. The NW flow aloft will
allow a pair of surface cold fronts to move thru our area. By
Sunday morning, the first cold front is already expected to be in
southern mo and far southern il on its way out of our region.
Impacts from this front will be mostly on rain chances, with the
best rain chances on Sunday being across far southern mo and il and
predominantly during the morning hours. The second cold front will
be just entering into northern mo and central il by Sunday evening.
With the highest cloud amounts and pops expected during the morning
and not so much in the afternoon, and only slightly cooler air
accompanying the first cold front, the dangerous heat and humidity
for many areas on Sunday is really not going anywhere. Currently
have forecast MAX air temps into the mid to upper 90s for most areas
with MAX heat index values of 100 or more for areas near and south
of i-70 with several areas topping 105. Will expand coverage of
heat headlines on Sunday from what was done yesterday still further,
most notably now into central mo. This headline may need to be
expanded to cover more areas further north yet until that second
cold front can get thru.
Speaking of which, the second cold front will drop down thru the
area on Sunday night. It looks like surface convergence with this
front will not be as pronounced as the first front 12-24 hours
earlier and rain chances look small. The main thing with this
second front will be the air that moves in behind it for Monday
and Tuesday will be noticeably cooler, to get us back to seasonable
temp values, and should finally bring an end to all heat headlines.|
The building of the upper ridge still looks on target for late
Tuesday into Wednesday but the models are less certain to it lasting
much more than that, with decent model consensus on a regression to
the west with a NW flow aloft developing once again for late next
week. This flow should once again enourage a cold front to drop
down thru the area. Such as it is, we may need to re-issue heat
headlines for select areas for a day or two during the middle of
next week, perhaps longer.
At this time. Rain chances look low for most days after Sunday, with
better chances returning late next week if the cold front does
indeed drop down thru the area.
Aviation (for the 06z tafs through 06z Saturday night)
issued at 1140 pm cdt Fri jul 21 2017
expect dry andVFR conditions at the terminals through midday on
Saturday. There is a slight chance that a thunderstorm could
affect kuin around 12z, but the chance is too low to include in
the TAF at this time. Then a cold front will begin moving south
across the area bringing isolated thunderstorms during the late
afternoon and evening hours. Coverage will be too isolated to
include in the tafs at this time. MVFR possible ifr ceilings and
visibilities are possible with any thunderstorms. A low level jet
will also cause llws at kuin and kcou between 07-13z.
Specifics for kstl:
mainly dry andVFR conditions are expected through the taf
period. The only exception will be on Saturday evening when a
cold front will move through the area from north to the south
bringing isolated thunderstorms. Winds will be west to
southwesterly through Saturday afternoon before they veer
northwesterly behind the front on Saturday evening.
Lsx watches warnings advisories
Mo... Excessive heat warning until 8 pm cdt Sunday for boone mo-
callaway mo-cole mo-crawford mo-franklin mo-gasconade mo-
iron mo-jefferson mo-lincoln mo-madison mo-moniteau mo-
montgomery mo-osage mo-reynolds mo-saint charles mo-saint
francois mo-saint louis city mo-saint louis mo-sainte
genevieve mo-warren mo-washington mo.
Excessive heat warning until 8 pm cdt this evening for audrain
mo-knox mo-lewis mo-marion mo-monroe mo-pike mo-ralls mo-
Il... Excessive heat warning until 8 pm cdt Sunday for bond il-calhoun
il-clinton il-jersey il-madison il-marion il-monroe il-
randolph il-saint clair il-washington il.
Excessive heat warning until 8 pm cdt this evening for adams il-
brown il-fayette il-greene il-macoupin il-montgomery il-
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Litchfield Municipal Airport, IL||25 mi||60 min||S 3||7.00 mi||Fair||74°F||73°F||96%||1011.2 hPa|
Wind History from 3LF (wind in knots)
|1 day ago||SW||SW||W||W||W||SW||SW||S||SW||SW||S||SW||S||S||S||S||S||S||S||Calm||Calm||Calm||Calm||Calm|
|2 days ago||Calm||Calm||W||W||W||W||W||W||Calm||Calm||Calm||Calm||S||S||Calm||S||Calm||Calm||SE||SE||S||S||S||S |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Midwest EDIT
Wind Forecast for St. Louis, MO (6,6,7,8)(on/off)  Help
Ad by Google
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.