Marine Weather and Tides
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.
|Sunrise 7:10AM||Sunset 7:16PM||Monday March 18, 2019 8:28 PM CDT (01:28 UTC)||Moonrise 3:33PM||Moonset 4:55AM||Illumination 95%|
7 Day Forecast for Marine Location Near Hannibal, MOHourly EDIT Help
Area Discussion for - St. Louis, MO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 klsx 182315|
area forecast discussion... Updated aviation
national weather service saint louis mo
615 pm cdt Mon mar 18 2019
Short term (through late Tuesday afternoon)
issued at 259 pm cdt Mon mar 18 2019
the period is pleasantly quiet with few items to address. The main
focus will be on chances for precipitation ahead of the next system
Surface high pressure is position at the western edge of an upper
longwave trough with northwest flow aloft. Surface analysis shows
a spread in temperatures that range from the mid upper 40s over
northeast missouri and into interior portions of illinois to the
mid upper 50s over central and southeast missouri.
Northwest flow continues to pump relatively drier air into the
area with just enough surface and mid-level moisture to result in
diurnal cu, mainly over far southeastern missouri and central
illinois. Given deeper mixing, what has developed generally
resides between 4k and 6k feet agl. Satellite obs show some of
this eroding on the back side, which is likely due to lower rh
being pushing in from the northwest through the mid-levels.
Expect much of the evening to remain mostly sunny with cloud cover
giving way after diurnal heating is lost.
Tuesday is looking to remain dry for most locations with the main
region in question being over central missouri. As the surface low
ejects east from the plains, it runs well ahead of the main upper
level shortwave that is passing southward through the central
plains. Ahead of the surface low, there is a relatively weak area
of mid-level lift associated with a warm front. However, moisture
is lacking through the surface and up to a certain point through
the mid layer, which has me less confident in any appreciable
precip. Therefore, much of the day is likely to remain dry with
maybe a widely scattered shower from columbia to quincy from late
morning into the early evening.
Otherwise, expect high clouds to stream in and thicken through the
morning as moisture continues to increase above 10k feet. Surface
flow turns out of the south southwest, likely pushing temperatures
into the 50s, despite less sunshine that today.
Long term (Tuesday night through next Monday)
issued at 259 pm cdt Mon mar 18 2019
much of the long term is quiet, but bookended by precipitation
chances. Near normal temperatures will moderate late in the week
with above normal condition as we head into next weekend.
Rain chances will increase through late Tuesday afternoon into
Tuesday evening. Latest trends in guidance bring a surface low|
from southwest to northeast through the heart of central
missouri. This focuses better lift and core of deeper moisture
through central and northeast missouri Tuesday evening and Tuesday
night. Further east, drier air remains in place through the low
and mid-levels, holding precipitation off until later in the
A cold front extending southwest of the surface low will begin to
push east through Tuesday night and into Wednesday morning. There
is enough moisture and convergence along the front that will
result in a linear pattern of scattered rain showers, most likely
through early Wednesday morning. Winds shifts out of the west
behind the front, but there isn't much cold air associate with the
surface wave. The main front moves through behind the upper level
shortwave late Wednesday with temperatures that will top out in
Much of the time is quiet beyond Wednesday as we settle back in
underneath northwest flow. A narrow, high amplitude upper ridge
begins to build northward through the central plains late this
week. As this move east, southerly flow develops and brings
milder, above normal temperatures to the region from Thursday into
Friday. It look like much of this could extend into the weekend as
surface high pressure builds over the great lakes and midwest.
The next chance of rain may hold off until early next week. This
results from a broad and weak upper level wave that continue to
open up as it pushes into the midwest. Surface dry layer may
impede much of the onset with plenty of time for changes to occur.
For now, it looks like low end chances for scattered rain showers
as we going into Monday with temperatures in the low 60s.
Aviation (for the 00z tafs through 00z Tuesday evening)
issued at 615 pm cdt Mon mar 18 2019
vfr conditions will prevail at the TAF sites through the valid
period. Chances for rain showers will gradually increase heading
into Tuesday afternoon, enough to place vcsh at kuin and kcou,
with the likely or higher pops holding off until after sunset. Stl
metro sites should be dry until late Tuesday night. Otherwise,
look for light winds to become SE and strengthen some during the
daytime on Tuesday but should mainly be just less than 10kts.
Lsx watches warnings advisories
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
|Quincy Regional Airport-Baldwin Field, IL||18 mi||35 min||N 3||10.00 mi||Fair||43°F||23°F||45%||1029.2 hPa|
Wind History from UIN (wind in knots)
|1 day ago||SE||SE||SE||SE||SE||SW||SW||W||NW||N||N||N||N||N||N||W||NW|
|2 days ago||W||W||W||NW||NW||NW||NW||W||W||Calm||SW||SW||SW||SW||W||W||NW||NW||SW||SW||SW||S||SE |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  HelpWeather Map
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 (21,6,7,8)(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.