Saturday, January25, 2020
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Marine Weather and Tides
Shepherdsville, KY

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 7:51AMSunset 5:58PM Saturday January 25, 2020 11:54 PM EST (04:54 UTC) Moonrise 8:35AMMoonset 6:47PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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 260101 AFDLMK

Area Forecast Discussion National Weather Service Louisville KY 801 PM EST Sat Jan 25 2020

Forecast Update. Issued at 800 PM EST Sat Jan 25 2020

Forecast has been updated this evening to account for the drizzle that has blossomed up over the last hour or so across north-central Kentucky and southern Indiana. There is some concern that we could see this activity transition to patchy freezing drizzle later tonight. Temperatures across most locations at this hour are above freezing where the drizzle is occurring (33-35 degrees), but a couple of locations (KIMS in Jefferson County, IN, and KFRH in Orange County, IN) are at the freezing mark. No road issues have been reported at this time, but an SPS has been issued to cover the potential for freezing drizzle and resulting slick spots.

Short Term. (This evening through Sunday) Issued at 310 PM EST Sat Jan 25 2020

Cloudy skies that have persisted throughout today look to continue tomorrow as the low pressure system to our north slowly meanders east of the Ohio Valley. Given that this stratus deck will limit radiational cooling overnight, only have lows falling into the upper 20s to low 30s. As we head into Sunday, the region will become situated between the exiting low pressure system and a weak wave upstream, allowing for dry conditions to prevail for much of the day with highs in the mid 40s. However, by late Sunday afternoon, the aforementioned shortwave will begin encroaching upon the region, causing light showers to develop along and slightly north of the KY/TN border.

Long Term. (Sunday night through Saturday) Issued at 310 PM EST Sat Jan 25 2020

Still some question marks on just how far north the precip shield will get Sunday night, i.e., will it make it to the I-64 corridor? The farther north areas will have a better chance for some kind of wintry conditions . farther into the colder air. Will maintain chances, though have a tighter gradient as we get into southern Indiana, trying to make our northern counties much drier. Limiting QPF and having a loss of ice crystals aloft will mean more of a drizzle, or freezing drizzle early Monday, forecast that far north.

Deep moisture looks to leave the region Monday morning, but forecast time-height sections from the GFS and NAM continue to depress . showing trapped low-level moisture that lingers at least to midweek. Both models show some very light QPF under that low- cloud scenario through Tuesday, so cannot rule out some periods of drizzle. Should it occur early Tuesday morning, we'll have another round of freezing drizzle potential. For now will carry a dry forecast and re-assess as we get closer to that forecast period.

As we get to Wednesday, we still have some model spread in how a couple of split stream systems will/will not phase. The GFS/GEFS/Euro all keep us dry, whereas the CMC has the southern upper low passing close enough to provide some light wintry precip over the region. We will have to watch for some upslope flow over eastern KY with any streamers coming down from Lake Michigan Wednesday afternoon and evening.

Then as we get to Friday, GFS and 00Z Euro both have another system crossing the Gulf Coast, which once again could phase with a northern stream system to drag some additional precip our way. Precip could linger into Saturday, once again with any moisture coming down from the Great Lakes. Timing of precip is in question . anything morning-wise would see light snow chances and otherwise expect rain. Did not make many changes to the blended model forecast here.

Aviation. (00Z TAF Issuance) Issued at 618 PM EST Sat Jan 25 2020

A large area of low pressure swirling over the Great Lakes will keep a low overcast in our skies through the night. Some patchy very light drizzle or flurries may fall from that overcast as well.

On Sunday a broad, weak surface trough will approach from the west while a fresh slug of low level moisture spreads from the lower Mississippi Valley into the Ohio Valley. The result will be a continuation of low clouds along with scattered light rain showers, especially in southern Kentucky (BWG) toward the end of the forecast period.

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

Update . DM Short Term . SSC Long Term . RJS Aviation . 13


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Louisville, Standiford Field, KY13 mi2 hrsWSW 1110.00 miOvercast35°F30°F82%1018.2 hPa
Fort Knox, KY16 mi58 minWSW 910.00 miLight Unknown Precip33°F33°F99%1019.5 hPa
Louisville, Bowman Field Airport, KY16 mi61 minWSW 810.00 miOvercast35°F28°F78%1018.3 hPa

Link to 5 minute data for KSDF

Wind History from SDF (wind in knots)
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Last 24hrSW9SW9W15
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1 day agoSE7SE7SE8SE9SE5SE4SE4SE5SE6SE6S4SW7S5S8SW8SW8W10W14SW10SW7SW5SW13
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2 days agoE3CalmS3SE4SE5SE6SE5SE6SE4SE4SE5SE5SE7SE8SE5SE6SE7SE8E6SE5E7E7E9SE10

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 Louisville, KY (23,6,7,8)
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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.