Saturday, March28, 2020
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Marine Weather and Tides
Hettick, IL

Version 3.4
NOTICE
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 6:48AMSunset 7:22PM Saturday March 28, 2020 4:06 PM CDT (21:06 UTC) Moonrise 8:12AMMoonset 10:32PM Illumination 23% Phase: Waxing Crescent; Moon at 5 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 282025 AFDLSX

Area Forecast Discussion National Weather Service Saint Louis MO 325 PM CDT Sat Mar 28 2020

SHORT TERM. (Through Late Sunday Night) Issued at 325 PM CDT Sat Mar 28 2020

Early this afternoon, a strong storm system was centered over eastern Nebraska moving northeast. The general upper pattern over the CONUS was one of a broad-based TROF over the western CONUS with another storm system located offshore of northern California, with an anomalously strong RIDGE based over the southeastern CONUS. At the surface, an area of low pressure around 996mb and deepening was located near KOMA. A warm front extended east of this low pressure through the Missouri-Iowa border into central Illinois and a cold front extended southward near the Missouri-Kansas border. Mostly stratiform precipitation with embedded convection existed over our region but new storms were taking shape near central Missouri with what will become our main severe weather event for today. This nicely intersects a region of strengthening and deepening lift from the main system and where clouds have cleared and destabilization is occurring in a very moist column. Temperatures in the 70s exist for most areas. Strong winds are taking shape in the dry slot of the system in western MO, where gusts have already topped 45mph in spots. This appears likely to edge into northeastern MO later this afternoon.

The center of the strong storm system will continue tracking northeast and become increasingly vertically stacked as it does so. With the surface cold front expected to push through our region this evening, look for one maybe two lines of convection (depending on the location) to drive through the forecast area during that time. Strong shear profiles especially at the lowest levels will open the door to tornado potential with storms exhibiting strong ascent along with the more usual large hail and damaging straight line winds. The storms are expected to exit the forecast area by 03-04z, maybe sooner if the second line does not develop as well as it appears to on the CAMs.

Currently affecting northeast MO is strong wind gusts mixing down from the dry slot influence. This should wane as the sun goes down, but of more importance will be strong winds pushing through later tonight as mixing levels deepen and tap into a 40kt H925 jet aloft. Will be issuing a Wind Advisory for areas near and north of I-70 where gusts to 45mph are expected and this will continue through most of Sunday.

Otherwise, look for dry weather the remainder of the period after midnight tonight. Temperatures will still be slightly above normal despite being behind the front on Sunday, with max temps in the 60s forecast, and more seasonal min temps expected Sunday night with upper 30s and lower 40s.

TES

LONG TERM. (Monday through Next Saturday) Issued at 325 PM CDT Sat Mar 28 2020

Overall this looks to be a quieter period, at least with respect to high impact weather, with one system edging us to the south for late Monday and Tuesday and another system edging us to the north for late week. Thunder looks hard to come by in either system and ensemble QPF members are showing nothing particularly heavy either. Much more uncertainty surrounds late week PoPs and trended towards CLIMO 20 percent values.

For temperatures, the persistent upper troffiness and intrusion of cooler airmasses will initiate a more prolonged period of below normal to normal temps for a good portion of next week.

TES

AVIATION. (For the 18z TAFs through 18z Sunday Afternoon) Issued at 1242 PM CDT Sat Mar 28 2020

VFR conditions outside of thunderstorms are expected at the TAF sites through the valid period. Main focus of thunderstorms will be associated with a pre-frontal TROF this afternoon for all sites and possibly again along the cold front itself for the STL metro sites a couple hours later early this evening. Some gusts to 20kts are possible ahead of the pre-frontal TROF with mainly south winds, but the main thrust of strong gusts to 30-35kt winds will arrive later this evening and overnight with the strongest gusts for KUIN.

TES

LSX WATCHES/WARNINGS/ADVISORIES. MO . Wind Advisory from 1 AM to 5 PM CDT Sunday for Lincoln MO- Montgomery MO-Pike MO-Saint Charles MO-Saint Louis City MO- Saint Louis MO-Warren MO.

Wind Advisory from 10 PM this evening to 5 PM CDT Sunday for Audrain MO-Boone MO-Callaway MO-Ralls MO.

Wind Advisory until 5 PM CDT Sunday for Knox MO-Lewis MO-Marion MO-Monroe MO-Shelby MO.

IL . Wind Advisory from 1 AM to 5 PM CDT Sunday for Adams IL-Bond IL- Brown IL-Calhoun IL-Clinton IL-Fayette IL-Greene IL-Jersey IL-Macoupin IL-Madison IL-Montgomery IL-Pike IL-Saint Clair IL.



WFO LSX


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Litchfield Municipal Airport, IL25 mi71 minSSE 107.00 miLight Rain67°F65°F95%1004.4 hPa

Link to 5 minute data for K3LF

Wind History from 3LF (wind in knots)
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Last 24hrN4SE3NE7NE4E11SE7SW5S12S10S9S10S11S12S8S7S8S9S7S8S11S13
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1 day agoS4NW3N8N7N7NE8NE8NE11
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NE9E6NE7E8SW5NE7E9E10SE8CalmN4NE4E5NE6NE7NE7
2 days agoS13
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 (17,4,5,8)
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Ground Weather Radar Station Central Illinois, IL
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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.