Thursday, August13, 2020
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Marine Weather and Tides
Boston, 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 6:56AMSunset 8:39PM Thursday August 13, 2020 1:08 PM EDT (17:08 UTC) Moonrise 12:36AMMoonset 3:21PM Illumination 27% Phase: Waning Crescent; Moon at 24 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 Boston, KY
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location: 37.75, -85.63     debug


Area Discussion for - Louisville, KY
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FXUS63 KLMK 131702 AFDLMK

Area Forecast Discussion National Weather Service Louisville KY 102 PM EDT Thu Aug 13 2020

. Updated Aviation Discussion .

Forecast Update. Issued at 940 AM EDT Thu Aug 13 2020

Visibilities have improved enough that the dense fog advisory will be allowed to expire at the top of the hour. Fog/stratus will likely persist for another couple of hours in south-central KY with clearing expected around noon. Rest of forecast remains on track.

Issued at 553 AM EDT Thu Aug 13 2020

Satellite imagery and a few obs are showing more persistent spots of dense fog across southern KY. Skies look to stay mostly clear in that area through sunrise, so expect the visibility restrictions to persist. Therefore, have issued a Special Weather Statement in coordination with OHX. Fog should burn off by 10 AM EDT/9AM CDT

Short Term. (Today and tonight) Issued at 305 AM EDT Thu Aug 13 2020

Today's forecast appears to be following a pretty similar template to what we saw yesterday. The early morning hours should stay mostly dry, with perhaps a few blips on radar across our SW. Otherwise, the main concern this morning will be patchy and transient fog. There have been some instances of locally dense fog across our southern CWA, however given the variable cloudiness don't expect fog to become very widespread or persist in one place very long. Will keep an eye on it.

Otherwise, expect another muggy day as highs top out in the upper 80s to around 90 in the presence of low 70s dew points. Given the weak upper low in the area and perhaps some differential heating due to variable cloudiness, expect to see showers and storms fire once again this afternoon. The best coverage is still supposed to be mainly along and west of the I-65 corridor, and across far southern KY although can't rule out at least an isolated shower or storm anywhere. A very moist atmospheric column will be around generally along and west of I-65 once again, where PWATs should exceed 2" this PM once again. Given the moist column and slow movement of any storms, some locally heavy rainfall amounts will once again be possible. Given moderate instability and little to no shear, don't expect any real organization to storms. However, gusty winds will be possible with stronger storms as we have seen with similar environments.

Overall coverage should diminish later tonight with the loss of heating, however with the upper low in the area and plenty of moisture still can't rule out some isolated to widely scattered activity. Look for mild lows around 70 once again.

Long Term. (Friday through Wednesday) Issued at 300 AM EDT Thu Aug 13 2020

Friday through Sunday Night .

A generally unsettled weather pattern is expected through this portion of the forecast period. Upper level flow will feature a baggy trough axis across the Ohio Valley with a developing ridge over the western US. This upper trough will move slowly through the region Friday and Saturday bringing periods of showers and thunderstorms to the region. Overall coverage should be higher on Friday and Saturday than what we've seen over the past few days. Environmental shear is still forecast to be rather weak, with your run of the mill afternoon instability values. Some of the storms could be on the strong side, but the main threats here will be torrential rainfall, gusty winds, and lightning. PWATs within this airmass will be quite high (>1.8 in). Training of cells could pose some flooding issues in places that see repeated rainfall.

Secondary upper level wave over the Midwest is forecast to drop into the region by Sunday. Associated with this wave, a surface cold front is forecast to push through the region late Sunday. Another round of showers and storms will accompany this front and quickly push through the region.

Highs through the period will generally be in the mid-upper 80s with overnight lows in the upper 60s to the lower 70s.

Monday through Wednesday .

Upper level pattern in this period will be very amplified with a ridge out over the western US and a large/baggy trough over the eastern US. This will place the Ohio Valley in a northwest flow configuration. The main weather story here will be the cooler than normal temperatures and much less humid conditions. Monday will likely be a transition day as the cooler air settles into the region with highs mainly in the low 80s. By Tuesday and Wednesday, highs will generally be in the mid-upper 70s with a few of the urban spots hitting 80. Overnight lows will be quite pleasant and cool with readings mid-upper 50s. A few of the typical cool spots may be able to drop into the low 50s Tuesday and Wednesday mornings.

Aviation. (18Z TAF Issuance) Issued at 101 PM EDT Thu Aug 13 2020

Isolated to scattered showers and thunderstorms have formed this afternoon near a weak boundary across central Kentucky. This activity will likely persist up through sunset before gradually tapering down in coverage. Models hint at overnight showers and storms redeveloping and moving into the region in the 03-06z timeframe and persisting past sunrise tomorrow morning. Confidence in where this may occur is low, and for now will highlight the potential with VCSH wording.

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

Update . BJS/DM Short Term . BJS Long Term . MJ Aviation . DM


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Knox, KY21 mi72 minN 010.00 miA Few Clouds84°F73°F71%1017.8 hPa

Link to 5 minute data for KFTK

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Last 24hrNE4N5NW4NW4N3N6N3CalmE4CalmN3CalmN4N5N3CalmCalmN3CalmE5E5CalmCalmNW3
1 day agoW6W5W5SW4W6W6CalmCalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoE10E7SE10SE8S7S6S8CalmS5N12N10CalmS6SE6CalmS3SW4CalmW3SW4SW4SW6SW6W5

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 Louisville, KY (13,3,4,5)
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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.