Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 6:14AM||Sunset 7:58PM||Thursday August 13, 2020 7:14 PM CDT (00:14 UTC)||Moonrise 12:00AM||Moonset 2:39PM||Illumination 24%|
7 Day Forecast for Marine Location Near Ozora, MOHourly EDIT Help
Area Discussion for - St. Louis, MO  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KLSX 132338 AFDLSX
Area Forecast Discussion . Updated Aviation National Weather Service Saint Louis MO 638 PM CDT Thu Aug 13 2020
SHORT TERM. (Through Late Friday Night) Issued at 226 PM CDT Thu Aug 13 2020
Slow moving thunderstorms continue develop along the stationary front draped from central North Dakota through central Iowa into eastern Missouri and southern Illinois. Driven by day time heating and a mid-level low and associated disturbance that retrograded overnight into eastern Missouri and southwest Illinois, these storms will largely linger where they form. Flash flood continues to be a concern as long as these showers and thunderstorms persist across the area, producing prodigious rainfall amounts across portions of southeast Missouri and southwest Illinois thanks to 1.5-2" of available precipitable water.
Convection and sky cover is expected to decay with nightfall, leaving moist conditions behind. Patchy fog will be possible during the early hours of the morning tomorrow in areas where the sky is able to clear sufficiently overnight. Any fog that develops will dissipate tomorrow morning once the sun comes up and daytime mixing commences.
Overnight and into Friday the mid-level low creeps slowly eastward, centering the best lift over southeast Missouri and southwest Illinois. As day time heating kicks into gear on Friday, blossoming showers will be able to tap into the 1500-2500 J/kg of MUCAPE and 1- 1.5" of precipitable water to generate another day of slow moving thunderstorms producing localized heavy rainfall over southeast Missouri and southwest Illinois. Showers and thunderstorms will die off with the loss of day time heating and the movement of the mid- level low and associated vorticity maxima out of the immediate area Friday evening.
With conditions across the area largely unchanged between Wednesday and Friday, we can expect temperatures to be fairly consistent with highs in the mid to upper 80s and lows in the mid 60s to low 70s.
LONG TERM. (Saturday through Next Thursday) Issued at 226 PM CDT Thu Aug 13 2020
A low-level cold front will move through the region Saturday afternoon. SREF probabilities and operational models indicate instabilities between 1000-2000 J/kg are likely with operational models indicating around 20 kts of 0-6 km bulk shear ahead of and along the front. But a lack of deep moisture convergence along the front will greatly limit precipitation chances, so have kept the NBM forecast of scattered showers and thunderstorms during the day Saturday.
A high pressure system will build in behind the front, lingering through the end of the period and helping to keep the extended period largely dry. Operational and ensemble guidance all point to the lingering surface high and persistent northerly flow keeping the area in below normal temperatures through the end of the period. The CIPS Analogs from St. Louis University point to below normal temperatures sticking around until the end of next week.
AVIATION. (For the 00z TAFs through 00z Friday Evening) Issued at 614 PM CDT Thu Aug 13 2020
Thunderstorms from earlier this afternoon are diminishing, and by 02Z they should dissipate completely. VFR conditions will prevail through the night until sometime between 09Z-11Z Friday morning. Some degree of MVFR radiational fog is expected at all sites except for KSTL, where relative humidity should remain low enough to keep fog at bay. Visibilities will likely be lower at KCPS and KSUS, where higher humidity values are forecasted.
After sunrise, low stratus should linger at these sites until 15Z, which could result in lower ceilings than those currently in the TAFs. Confidence is not high enough in IFR ceilings to warrant mention in the TAFs at this time. Once ceilings improve, VFR conditions should prevail. Thunderstorm activity is expected in southeast MO and southwest IL, but should remain southeast of the terminals.
LSX WATCHES/WARNINGS/ADVISORIES. MO . Flash Flood Watch until 7 PM CDT this evening for Crawford MO- Franklin MO-Iron MO-Jefferson MO-Lincoln MO-Madison MO- Reynolds MO-Saint Charles MO-Saint Francois MO-Saint Louis City MO-Saint Louis MO-Sainte Genevieve MO-Warren MO- Washington MO.
IL . Flash Flood Watch until 7 PM CDT this evening for Bond IL- Calhoun IL-Clinton IL-Fayette IL-Greene IL-Jersey IL- Macoupin IL-Madison IL-Marion IL-Monroe IL-Montgomery IL- Randolph IL-Saint Clair IL-Washington 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. Follow links for more data.
|Farmington Airport, MO||20 mi||18 min||ENE 7||10.00 mi||A Few Clouds||80°F||72°F||76%||1015.7 hPa|
Link to 5 minute data for KFAM
Wind History from FAM (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NE||Calm||Calm||Calm||S||SE||N||Calm||S||S||NE||E||S||E||NE||E|
|2 days ago||N||NE||E||S||SE||NW||S||S||S||S||Calm||Calm||Calm||S||W||Calm||N||W||S||Calm||S||NW||SW |
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map(on/off)  Help Weather Map
GEOS 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 (20,4,5,8)(on/off)  Help
Ad by Google
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 numerous 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.