Tuesday, October27, 2020
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Marine Weather and Tides
Shepherdsville, KY

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 8:02AMSunset 6:50PM Tuesday October 27, 2020 10:34 AM EDT (14:34 UTC) Moonrise 4:26PMMoonset 3:10AM Illumination 82% Phase: Waxing Gibbous; Moon at 11 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 Shepherdsville, KY
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location: 38, -85.7     debug


Area Discussion for - Louisville, KY
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FXUS63 KLMK 271351 AFDLMK

Area Forecast Discussion National Weather Service Louisville KY 951 AM EDT Tue Oct 27 2020

Forecast Update. Issued at 949 AM EDT Tue Oct 27 2020

Current radar continues to show a SW-NE oriented band of light rain and drizzle roughly over the OH River, which is expected to slowly dissipate by mid afternoon. Accumulations have been light for the most part with HNB reporting a 24 hour total of 0.12" and hardly any measurable amounts in central KY according to KY Mesonet. Current temperatures across the region are on track, and sounding data continues to suggest a breaking up of clouds in the Lake Cumberland area that will result in much warmer temperatures in the low to mid 60s compared to highs in the low to mid 50s across southern Indiana and north central KY. Overall, previous forecast remains on track. Only slight updates made to near term grids, so no updated products will be needed at this time.

Short Term. (Today and tonight) Issued at 312 AM EDT Tue Oct 27 2020

An area of light rain from northeast Oklahoma to southern Missouri during the pre-dawn hours will slide northeast into southern Indiana and north central Kentucky this morning, potentially dropping around a tenth of an inch of rain. This afternoon looks drier as forcing weakens, though there will continue to be some weak isentropic upglide coincident with high RH resulting in stubborn cloudiness and perhaps a few sprinkles over southern Indiana and north central Kentucky. Over southern Kentucky dry mid level air is expected to push northward from the Tennessee Valley and may actually enable some peeks of sunshine. High temperatures will vary greatly from around 50 with clouds and rain in southern Indiana . to middle or upper 60s in the Lake Cumberland region with drier weather and possibly some afternoon sun.

Tonight the dry mid-level air will continue to push northward but low level moisture will remain in place with widespread cloudiness. Some patchy drizzle not out of the question in southern Indiana and northwest Kentucky generally west of I-65 in region of lowest cloud bases.

Long Term. (Wednesday through Monday) Issued at 330 AM EDT Tue Oct 27 2020

The focus for the start of the period remains how much rain we could receive Wed through Thu as several weather features come together and interact with one another. Deep cutoff low across NM/TX will slowly eject eastward lifting a surface warm front and deep tropical moisture northward across the OH/TN Valleys which will interact with a baroclinic zone across the region. All of this as Zeta makes landfall across the Gulf Coast of LA/MS Wednesday night and then lifts quickly northward along/east of the Appalachians. While we're less concerned about the actual tropical system, moisture ahead and north of Zeta could bring precipitation totals of 2 to 3 inches across the region with some local areas approaching 3.5 to possibly 4 inches, especially our counties across southern Indiana and along the Ohio River.

Rain will spread in across the CWA Wednesday afternoon from the south and push northward. Most widespread and heaviest of the precipitation is anticipated to be Wednesday night into Thursday thanks to a developing deformation band. As mentioned in the previous discussion, some bust potential continues, especially over south-central KY, as a dry slot associated with the upper low could cut into rain amounts.

Drying will take place during the day on Friday as the cut off low is absorbed into the main flow across the Mid-Atlantic and a 1031mb surface high settles in over the Ohio Valley by Saturday morning. Colder air behind the departing system and clearing skies sets the stage for possible frost Saturday morning.

November starts with a cooler than normal pattern as a trough develops over the eastern US. A reinforcing cold front pushes through on Sunday but moisture is limited so continue to keep the period dry. Highs over the Halloween weekend will be in the upper 50s to near 60 with Monday high temperatures cooler in the low to middle 50s.

Aviation. (12Z TAF Issuance) Issued at 643 AM EDT Tue Oct 27 2020

A corridor of low clouds is expected to persist from Texas to the Ohio Valley today, likely keeping HNB IFR for much of the daylight hours. A hole in the low clouds opened up INVOF SDF, but that is expected to close early in the new TAF period. An area of light rain over the Ozarks during the pre-dawn hours will slide up the Ohio Valley after sunrise, bringing light rain to HNB and possibly SDF.

This afternoon and evening we lose some upper support and vertical motion weakens, leading to drier weather and a possible slight lifting of ceilings but likely still prevailing below VFR.

The well advertised heavy rain event for Wednesday-Thursday should commence just beyond this TAF period.

LMK WATCHES/WARNINGS/ADVISORIES. IN . None. KY . None.

Update . CG Short Term . 13 Long Term . BTN Aviation . 13


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Louisville Muhammad Ali International Airport, KY13 mi39 minN 65.00 miLight Rain Fog/Mist50°F46°F89%1024.8 hPa
Fort Knox, KY16 mi39 minN 310.00 miOvercast49°F47°F96%1024.9 hPa
Louisville, Bowman Field Airport, KY16 mi42 minN 56.00 miOvercast with Haze50°F45°F83%1024.9 hPa

Link to 5 minute data for KSDF

Wind History from SDF (wind in knots)
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Last 24hrN3W6NW5N9NW4NW6N8NE7N6N5N5N7NE4SE8NE5N7N5NE5N4NE6E5NE4E5N6
1 day agoNE7NE7E8NE8E7E8E5NE5E43NE3E3E3CalmCalmNW3W3W4NW5W5W7NW4NW3N4
2 days agoN10N9N9E6E104NE5E8NE8NE9NE6E8NE11E8E7NE6NE7E8NE7NE7NE9N6N7NE8

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
Ground Weather Radar Station Louisville, KY
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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.