Saturday, May27, 2017 L-36.com


Marine Weather and Tides
Columbus, GA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:33AMSunset 8:41PM Saturday May 27, 2017 11:42 AM EDT (15:42 UTC) Moonrise 7:31AMMoonset 9:48PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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 271125
afdffc
area forecast discussion
national weather service peachtree city ga
725 am edt Sat may 27 2017

Update
The hi-res models are coming more into line with and MCS impacting
the northern portions of the state late this afternoon early
evening. Have raised pops before midnight in the tonight period to
reflect the current trends.

Prev discussion issued 356 am edt Sat may 27 2017
short term today through Sunday ...

unsettled weather is expected across portions of northern ga through
the short term period.

Surface high pressure remains well to the south, while aloft the
cwfa will remain on the periphery of ridge. A couple of strong upper
level disturbances are progged to move across the top of the ridge,
one today and another during the first part of Sunday. The synoptic
and hi-res models do struggle with these types of systems,
especially with timing. Both of the locally run WRF models are
similar with trends for today's system, a potential mcs. The hrrr
looks like it may be catching on, if the last frames are any
indication. There are still some timing issues, so have taken a
blend between the two locally run wrf's and whatever frames of the
hrrr that are in.

The MCS is currently winding up across southern mo and northern ar.

The system should continue eastward in the flow for the next few
hours, then start to make a southeast dive during the late
morning early afternoon... Clipping northern ga. Have increased pops
to likely across those areas most likely impacted by the mcs. Do
think areas north of the metro will have the best chances of
convection.

With very steep mid level lapse rates, good deep level shear and
very good surface instability present... Storms will have the
potential to become severe. Isolated to scattered severe
thunderstorms will be possible across the north, with the primary
severe weathers modes begin large hail and damaging wind gusts.

The models are suggesting another round of convection during the
early part of Sunday... Another potential mcs. Have taken a more
broadbrushed approach to pops for now... But it does look like areas
mainly north of interstate 20 will be impacted. In addition, a few
of the storms could also be strong to severe.

Nlistemaa
long term Sunday night through Friday ...

main forecast concern in long term period is chance for
strong severe convection on Monday. 00z model guidance in pretty
good agreement with Monday forecast. Front progged to continue to
sag into the state Monday with above normal sfc temps and
dewpoints. SBCAPE rises to fairly high values even for late may,
gfs 2500-3500 j kg. Deep layer shear should be sufficient for
severe convection, 0-6km bulk shear mags > 30kts over much of the
cwa, however low level shear quite weak with 0-1km bulk shear
around 5-10kts. In such environments, we typically see severe
storms with large hail and wind threats but very low risk of
tornadoes. Pw will be fairly high but not too abnormally high for
this time of year (gfs values around 1.6 in). With large scale
lift not too high, QPF also less than 1 inch in most locations
mon, so will likely see periods of heavy rain but flash flooding
risk somewhat low.

After front sags into middle or south ga, essentially washes out
Tuesday. Moisture remains plentiful but without any forcing, any
storms would be fairly isolated thru Thursday. Have kept pops
fairly low but unlikely we will see a dry period with weak swly
flow aloft. By thurs night or Friday, warm advection should kick
in with increase in moisture as well. Have bumped up pops then.

Snelson

Aviation
12z update...

hi-res models are in somewhat better agreement with the track of
an area of shra tsra to impact portions of northern ga late this
afternoon and evening. Latest tracks to bring the system to near
atl before it weakens. Added in vcsh around 1-3z to account for
the increased chances for shra. Not confident on the extent of
coverage for the storms, so will not mention thunder in a tempo or
prob group just yet. Another disturbance is expected to
potentially impact the area early on Sunday. Models still progging
MVFR CIGS for a brief period overnight. Winds will remain on the
west side with low end gusts during prime mixing today.

Atl confidence... 12z update...

medium confidence all elements.

Preliminary point temps pops
Athens 88 69 89 70 30 30 30 20
atlanta 87 71 87 70 20 30 20 40
blairsville 82 63 82 63 60 60 40 50
cartersville 86 69 88 68 30 30 30 50
columbus 89 71 90 73 0 5 10 20
gainesville 85 69 86 69 50 60 30 30
macon 90 68 91 71 0 5 10 20
rome 85 68 87 68 30 30 40 60
peachtree city 87 68 88 69 10 20 10 30
vidalia 91 70 94 73 0 0 10 10

Ffc watches warnings advisories
None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Columbus, Columbus Metropolitan Airport, GA3 mi51 minW 710.00 miFair77°F63°F62%1018 hPa
Fort Benning, GA14 mi44 minSW 610.00 miFair77°F65°F68%1018.6 hPa

Wind History from CSG (wind in knots)
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Last 24hr--6NW5SW8NW6W4W12SW9SW7SW5SW4SW4S3SW3W3CalmCalmE3CalmCalmCalmSW5W7W7
1 day agoW8
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W9W12NW8NW11W8W5W3NW3CalmCalmE3CalmCalmCalmCalmCalmCalmCalm4SW7
2 days agoW9W11W13
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G19

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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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Peachtree City, GA (11,2,3,4)
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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.