Friday, January17, 2020
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Marine Weather and Tides
Hamilton, OH

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 7:54AMSunset 5:42PM Friday January 17, 2020 10:27 AM EST (15:27 UTC) Moonrise 12:39AMMoonset 12:25PM Illumination 51% Phase: Third Quarter Moon; Moon at 22 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 Hamilton, OH
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location: 39.4, -84.57     debug


Area Discussion for - Wilmington, OH
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FXUS61 KILN 171354 AFDILN

AREA FORECAST DISCUSSION National Weather Service Wilmington OH 854 AM EST Fri Jan 17 2020

SYNOPSIS. High pressure extending across the area will move off to the east today. A warm front will lift north through the region late tonight into Saturday morning bringing a wintry mix with it. A cold front will quickly follow on Saturday afternoon and evening with gusty winds after it passes.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Not too many updates made to the ongoing fcst other than raising temps a degree or two in the south for this afternoon. The near term period will be relatively quiet with a gradual increase in mid/high level clouds through the day today. Even though we may see some radar returns on composite mosaic imagery approaching from the west even by late afternoon, substantial dry air in the low levels will initially inhibit this pcpn from reaching the ground until a bit later in the evening -- even in the west. So kept the fcst dry through the near term period.

The increase in thicker cloud cover should keep temps fairly chilly -- with many spots near/north of the I-70 corridor remaining below/close to freezing through the day. Highs will top out close to 40 degrees south of the Ohio River.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/. Robust warm air advection ahead of low pressure heading into the Great Lakes will result in precipitation developing during the evening. A warm advection wing will push across the area. This will likely be light, especially with dry low levels. Expect initial precipitation type to be snow or a rain/snow mix. As low levels moisten, temperatures will wet bulb down a few degrees. But then readings will start to slowly rise as a warm front lifts into and across the area late tonight into Saturday morning.

As large scale forcing increases with the approach of a short wave, more widespread precipitation will occur and move across the area later tonight. Warm surge will result in temperatures getting above freezing aloft faster than at the surface. Thus precipitation will transition through a wintry mix before becoming plain rain. Guidance has trended heavier with precipitation while cold air is still in place to the north and west of I-71. So snow accumulations across northern counties are a bit higher. This in combination with some freezing rain warrants a winter weather advisory from Mercer to Union Counties. Snow accumulations will be less in east central Indiana and adjacent sections of western Ohio as warm air aloft gets there earlier, but heavier precipitation means that there may be a bit more freezing rain accumulation there compared to other parts of the forecast area. So have also issued a winter weather advisory in those locations. Elsewhere, precipitation will be lighter while still frozen/freezing. There could be some minor snow/ice accumulation before transitioning and warming enough for rain. But based on available data, it seems like this would have minimal impact.

Rain will continue until a cold front pushes across the area later Saturday afternoon. Clouds and precipitation should limit the temperature rise in the warm sector. Fairly strong pressure gradient will result in respectable sustained winds, but without much potential for mixing, gusts should be limited, at least until the cold front moves through. Even then, gust potential continues to trend down.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/. While the bulk of the precipitation will have ended by Saturday evening, the cold air intrusion behind the frontal passage will just be getting started. What few lingering rain and snow showers overpower the dryness of the incoming air will be few and short lived early in the evening, primarily expected in the eastern sections of the CWA, and most sincerely finished by midnight. A strong zonal wind at all levels will have temperatures range from 11 in the northwest to 22 in the southeast. Highs on Sunday will only bounce back 4 or 5 degrees in the north and 6 or 7 degrees in the south under continued cold air advection. Sunday night lows will be a bit more uniform in the 10-15 degree range, with cooler readings found in the western CWA over southeast Indiana.

Cloud cover will not make any difference in temperatures during the weekend, though a bit more clouds are expected in the north whereas the south could see some clearing on Sunday. The continued cold air intrusion and passage of upper level shortwave energy will create a good bit of clouds on Monday, as temperatures range from around 20 in the west to near 25 in the east. While some flurries and a passing snow shower are possible, the dryness of the lower atmosphere had me leave out mention this far out in the forecast.

Overnight temps will be uniformly in the middle teens by Tuesday morning, and then the region may start to modify readings as a surface high settles over the Ohio Valley and upper level ridging builds in from the west. Highs will still be below climo but begin to approach them on highs for this day. The clear skies and lighter winds (even if they do become southerly overnight) will keep upper teens as the forecast mins for yet one more night.

South flow on the back side of this high ahead of the next low developing in the plains will see readings surpass normals for the end of the forecast. Any rain should hold off until after the last valid period of this forecast.

AVIATION /14Z FRIDAY THROUGH TUESDAY/. Lower clouds are starting to break up, but there will still be come MVFR ceilings around the region for the beginning of the TAF period until those clouds scatter. After that, it will be VFR with high and eventually mid clouds spreading across the area. Some light precipitation may develop after 00Z but more substantial precipitation will be after 06Z. This will start as a wintry mix, except in the Cincinnati area where it will start as rain, and then transition to rain. Conditions may lower to MVFR again late in the period.

Winds will become east today and then veer to southeast or even south while strengthening to near 15 kt.

OUTLOOK . MVFR ceilings and visibilities will continue through Saturday, possibly lingering into Saturday night. Winds gusts over 30 kt are likely Saturday night.

ILN WATCHES/WARNINGS/ADVISORIES. OH . Winter Weather Advisory from 11 PM this evening to 6 AM EST Saturday for OHZ042-051-060. Winter Weather Advisory from 8 PM this evening to 8 AM EST Saturday for OHZ026-034-035-043>045-052. KY . None. IN . Winter Weather Advisory from 11 PM this evening to 6 AM EST Saturday for INZ050-058-059.

SYNOPSIS . NEAR TERM . KC SHORT TERM . LONG TERM . Franks AVIATION .


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Butler County Regional Airport, OH4 mi34 minE 810.00 miFair26°F16°F66%1043.3 hPa
Hook Field Municipal Airport, OH13 mi52 minE 710.00 miFair26°F16°F66%1043 hPa
Cincinnati, Cincinnati Municipal Airport Lunken Field, OH22 mi34 minE 810.00 miFair27°F16°F63%1043.3 hPa
Dayton, Dayton-Wright Brothers Airport, OH23 mi34 minE 810.00 miFair26°F15°F63%1042.5 hPa

Link to 5 minute data for KHAO

Wind History from HAO (wind in knots)
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1 day ago3Calm4CalmS43W5W6W8
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2 days agoW7W9W8--NW7W5W74CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE3NE3N3Calm4

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 Midwest    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

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Wind Forecast for Wilmington, OH (10,2,3,4)
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Ground Weather Radar Station Wilmington, OH
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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.