Monday, December16, 2019
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Marine Weather and Tides
Acworth, GA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:36AMSunset 5:32PM Monday December 16, 2019 5:31 AM EST (10:31 UTC) Moonrise 10:17PMMoonset 11:28AM Illumination 78% Phase: Waning Gibbous; Moon at 19 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 Acworth, GA
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location: 34.1, -84.62     debug


Area Discussion for - Peachtree City, GA
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FXUS62 KFFC 160932 AFDFFC

Area Forecast Discussion National Weather Service Peachtree City GA 432 AM EST Mon Dec 16 2019


SHORT TERM /Today through Tuesday/.

Current satellite loop shows some Mid to Low level clouds streaming across the SE ahead of developing approaching frontal system now over the Central and Southern Plains states. The cold front will make its way through the Central and Southern MS river valley today with a line of severe showers and thunderstorms. This front will push into NW GA just after sunset tonight with showers and thunderstorms moving into the state. Before the system arrives temperatures will increase into the unseasonably warm mid-60s to mid- 70s. With such warm temps and moist southerly flow we will see some isolated prefrontal showers today, but precip chances dont really increase until the front arrives. As this front moves out of the MS river valley This evening the Hi-res/short-term models are continuing to show an overall weakening trend with this system. The over all organization/intensity weakens some as broken line of showers/storms approach northwest and west-central GA between 8 pm and midnight tonight. However, low-mid 60s dewpoints yielding just enough instability along with 40-50kt low lvl (0-3km) winds to support small pockets of organized convection that could result in strong to damaging winds and perhaps even a brief/spin-up tornado. Axis of heaviest rain with this system will be across north GA where a more prolonged period of heavier rain is likely. As much as 1 to locally 2 inches is expected with lesser amounts south/east of I-85.

Risk for severe includes areas mainly across West and NW GA through daybreak Tuesday morning. There will still be a potential for a few stronger storms across east/central GA Tuesday afternoon as the system exits the area. However, weakening low lvl wind shear and overall support should end overall severe threat across these areas.

As this system exits the area Tuesday afternoon, gusty northwest winds 15-30 MPH will usher in a much colder and drier airmass.

01

LONG TERM /Tuesday Night through Sunday/.

Models agree on a strong cold front pushing east of the forecast area as the long term begins. Have continued with low pops in the far east central counties for Tuesday night. Tuesday night into Wednesday should be dominated by gusty winds and strong cold advection. Temperatures should moderate some for Friday as an upper ridge builds briefly over the southeast. Southwest flow aloft ahead of the next upper trough will bring rain back into the forecast area for Friday night into Sunday. GFS and ECMWF diverge on evolution of features for the weekend. The ECMWF is deeper and slower with the southern stream trough while the GFS sweeps the system off the Atlantic Coast by Saturday afternoon. To compromise with these differences and to blend with surrounding offices . pops have been continued for much of north and central GA through Sunday.

41

AVIATION .

06Z Update .

MVFR to VFR ceilings across the area this morning with light SE winds. Ceilings will fall a bit more through daybreak with some IFR reading across the area. The ceilings will lift back into t he MVFR range the VFR by this afternoon. Winds will stay out of the SE at 10kt or less today but as the frontal boundary moves a bit closer winds will increase out of the SW with 10-14kt gusting to 20kt. tonight into Tuesday morning. Precip chances slowly increase across the area from NW to SE but not expecting any precip at the ATL area sites until after 00z Tuesday.

//ATL Confidence . 06Z Update . Low confidence for ceilings heights Medium to high confidence all other elements.

01

PRELIMINARY POINT TEMPS/POPS. Athens 67 56 64 34 / 20 80 100 5 Atlanta 67 55 64 32 / 20 90 100 5 Blairsville 60 49 58 27 / 30 100 90 5 Cartersville 67 52 59 29 / 30 90 90 5 Columbus 73 59 65 34 / 10 90 90 5 Gainesville 63 54 62 32 / 30 90 100 0 Macon 75 60 67 34 / 10 60 100 10 Rome 68 50 57 29 / 30 90 70 5 Peachtree City 69 56 64 31 / 20 90 100 5 Vidalia 76 59 74 40 / 5 30 70 40

FFC WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . 01 LONG TERM . 41 AVIATION . 01


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cobb County International Airport - McCollum Field, GA6 mi41 minS 410.00 miOvercast57°F53°F87%992.4 hPa
Cartersville Airport, GA12 mi38 minSE 310.00 miOvercast58°F53°F84%1019.3 hPa
Marietta / Dobbins Air Force Base, GA13 mi35 minSE 310.00 miOvercast56°F51°F86%1020 hPa
Dallas Paulding County Regional Airport, GA22 mi36 minN 07.00 miOvercast52°F51°F100%1019.6 hPa
Fulton County Airport-Brown Field, GA23 mi38 minN 010.00 miOvercast56°F51°F84%1019.9 hPa
Atlanta, De Kalb-Peachtree Airport, GA23 mi38 minN 010.00 miOvercast54°F50°F87%1020.3 hPa

Link to 5 minute data for KRYY

Wind History from RYY (wind in knots)
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Last 24hrCalmCalmCalmCalmCalm454SW6S85SW84E6E5NE4E64SE53354S4
1 day agoW65W6
G15
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W8W11NW11W8SW4CalmCalmW3CalmCalmCalmCalmCalmCalmW3Calm
2 days ago6E8
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E866E7E43E7E5E5E33E4CalmNW5W4W4W6W6W7

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
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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 Peachtree City, GA (5,6,7,8)
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Ground Weather Radar Station Atlanta, GA
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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 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.