Monday, December10, 2018 L-36.com


Marine Weather and Tides
Columbus, GA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:29AMSunset 5:36PM Monday December 10, 2018 6:42 PM EST (23:42 UTC) Moonrise 10:10AMMoonset 8:38PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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 Columbus, GA
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location: 32.51, -84.87     debug


Area Discussion for - Peachtree City, GA
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Fxus62 kffc 101944
afdffc
area forecast discussion
national weather service peachtree city ga
244 pm est Mon dec 10 2018

Short term tonight through Tuesday night
We allowed the winter storm warnings and advisories to expire across
the northern ga counties. While the threat for some snow still
exists in the higher terrain we should only see light accumulations,
if any, on grassy surfaces as the snow should also mix with rain as
well. Model soundings suggest precip would originate as snow but
the lower boundary layer above freezing is just deep enough to melt
it across most of the population areas. The sheared upper low
responsible is slowly sinking south today and as it does will fill
with light rain showers and drizzle across most of north ga. Mean
1000-500mb layer rh values with this upper low running a very high
90-100%... Which also includes the lowest 1km of the atmosphere.

Model soundings and forecast rh suggest very high rh values continue
into Tuesday am which when combined with the upper 20s to near 30
degrees should pose a threat for black ice formation overnight.

Refer to the special weather statement for black ice concerns and
locations. The uncertain part of the forecast revolves around any
fog formation overnight and if we see dense fog and if it forms when
temps drop below freezing to create a freezing fog situation. Will
need to take a closer look at things the next few hours to evaluate
both potentials.

On Tuesday... Temps warm rather quickly behind the upper low as skies
clear and the Sun is able to finally make an appearance. Most if
not all winter hazards should subside through the morning hours.

Drier air and surface ridge works in for the remainder of the
period.

30

Long term Wednesday through Monday
No major changes made to the extended forecast. Models agree on
drying for mid week as an upper ridge builds over the southeast.

The ridge progresses eastward rapidly... And by late Wednesday early
Thursday moisture has started to work its way back into north ga.

For that time frame... The available moisture looks limited but
have held on to slight chance precipitation for the north. This
would still give a chance of light rain freezing rain for the far
northeast. No accumulation mentioned at this time since it looks
like it may depend on whether the moisture can arrive quick
enough. Otherwise... A strong closed upper low will move across the
southeast Thursday into Saturday. ECMWF is slower with moving the
low eastward... But Sunday still looks like it may be dry... Or
drying so have left pops out.

41 01

Aviation 18z update...

ifr MVFR CIGS should continue through the afternoon and into the
early evening. Tricky forecast with the vsby as they are likely to
lower in the showers and drizzle but bounce back outside of those
times. Large area of showers over north ga is expanding as the
main upper low sinks south and expect much of this to spread into
taf sites through the afternoon and evening. Meanwhile do expect
cigs to gradually improve through the evening and overnight as
drier air works in aloft. Some fg is possible overnight at all
sites with light winds and high rh values. For now... Have left it
out but will need to possibly add in future updates. Skies should
clear out quickly in the morning as the upper level system exits.

Atl confidence... 18z update...

medium confidence on CIGS and vsby.

High confidence on precip and winds.

30

Preliminary point temps pops
Athens 32 53 30 53 70 0 0 0
atlanta 31 50 30 52 60 0 0 0
blairsville 23 47 24 49 60 0 0 0
cartersville 27 49 28 52 60 0 0 0
columbus 35 54 30 56 40 0 0 0
gainesville 30 51 30 51 70 0 0 0
macon 35 55 28 56 50 0 0 0
rome 26 49 27 51 50 0 0 0
peachtree city 31 52 28 54 60 0 0 0
vidalia 36 56 32 58 30 5 0 0

Ffc watches warnings advisories
None.

Short term... 30
long term... .01
aviation... 30


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Columbus, Columbus Metropolitan Airport, GA3 mi52 minNNW 89.00 miOvercast44°F39°F85%1021.1 hPa
Fort Benning, GA14 mi47 minW 410.00 miOvercast43°F43°F100%1021.6 hPa

Wind History from CSG (wind in knots)
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Last 24hrNE3N4N4N3N5NW7N6N4NW5NW6NW5NW7NW6NW9NW5NW8NW8NW7NW5NW8NW7N6NW6N8
1 day agoE15
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E11NE8NE8N5E11E15
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2 days agoE5E3NE3CalmCalmCalmE3E6E5E3E5E8E9E11E10E12E10E11E10NE9
G14
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G22
E12

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Peachtree City, GA (18,4,5,8)
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Ground Weather Radar Station Atlanta, GA
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Disclaimer:
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 numerious 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.